main external API structure. More...

#include <avcodec.h>

Data Fields
const AVClass *	av_class
	information on struct for av_log

int	log_level_offset

enum AVMediaType	codec_type

struct AVCodec *	codec

attribute_deprecated char	codec_name [32]

enum AVCodecID	codec_id

unsigned int	codec_tag
	fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

unsigned int	stream_codec_tag
	fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

void *	priv_data

struct AVCodecInternal *	internal
	Private context used for internal data.

void *	opaque
	Private data of the user, can be used to carry app specific stuff.

int	bit_rate
	the average bitrate

int	bit_rate_tolerance
	number of bits the bitstream is allowed to diverge from the reference.

int	global_quality
	Global quality for codecs which cannot change it per frame.

int	compression_level

int	flags
	CODEC_FLAG_*.

int	flags2
	CODEC_FLAG2_*.

uint8_t *	extradata
	some codecs need / can use extradata like Huffman tables.

int	extradata_size

AVRational	time_base
	This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.

int	ticks_per_frame
	For some codecs, the time base is closer to the field rate than the frame rate.

int	delay
	Codec delay.

int	width
	picture width / height.

int	height

int	coded_width
	Bitstream width / height, may be different from width/height e.g.

int	coded_height

int	gop_size
	the number of pictures in a group of pictures, or 0 for intra_only

enum AVPixelFormat	pix_fmt
	Pixel format, see AV_PIX_FMT_xxx.

int	me_method
	Motion estimation algorithm used for video coding.

void(*	draw_horiz_band )(struct AVCodecContext s, const AVFrame src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
	If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.

enum AVPixelFormat(*	get_format )(struct AVCodecContext s, const enum AVPixelFormat fmt)
	callback to negotiate the pixelFormat

int	max_b_frames
	maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.

float	b_quant_factor
	qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).

int	rc_strategy
	obsolete FIXME remove

int	b_frame_strategy

float	b_quant_offset
	qscale offset between IP and B-frames

int	has_b_frames
	Size of the frame reordering buffer in the decoder.

int	mpeg_quant
	0-> h263 quant 1-> mpeg quant

float	i_quant_factor
	qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).

float	i_quant_offset
	qscale offset between P and I-frames

float	lumi_masking
	luminance masking (0-> disabled)

float	temporal_cplx_masking
	temporary complexity masking (0-> disabled)

float	spatial_cplx_masking
	spatial complexity masking (0-> disabled)

float	p_masking
	p block masking (0-> disabled)

float	dark_masking
	darkness masking (0-> disabled)

int	slice_count
	slice count

int	prediction_method
	prediction method (needed for huffyuv)

int *	slice_offset
	slice offsets in the frame in bytes

AVRational	sample_aspect_ratio
	sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.

int	me_cmp
	motion estimation comparison function

int	me_sub_cmp
	subpixel motion estimation comparison function

int	mb_cmp
	macroblock comparison function (not supported yet)

int	ildct_cmp
	interlaced DCT comparison function

int	dia_size
	ME diamond size & shape.

int	last_predictor_count
	amount of previous MV predictors (2a+1 x 2a+1 square)

int	pre_me
	prepass for motion estimation

int	me_pre_cmp
	motion estimation prepass comparison function

int	pre_dia_size
	ME prepass diamond size & shape.

int	me_subpel_quality
	subpel ME quality

int	dtg_active_format
	DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.

int	me_range
	maximum motion estimation search range in subpel units If 0 then no limit.

int	intra_quant_bias
	intra quantizer bias

int	inter_quant_bias
	inter quantizer bias

int	slice_flags
	slice flags

int	mb_decision
	macroblock decision mode

uint16_t *	intra_matrix
	custom intra quantization matrix

uint16_t *	inter_matrix
	custom inter quantization matrix

int	scenechange_threshold
	scene change detection threshold 0 is default, larger means fewer detected scene changes.

int	noise_reduction
	noise reduction strength

int	me_threshold
	Motion estimation threshold below which no motion estimation is performed, but instead the user specified motion vectors are used.

int	mb_threshold
	Macroblock threshold below which the user specified macroblock types will be used.

int	intra_dc_precision
	precision of the intra DC coefficient - 8

int	skip_top
	Number of macroblock rows at the top which are skipped.

int	skip_bottom
	Number of macroblock rows at the bottom which are skipped.

float	border_masking
	Border processing masking, raises the quantizer for mbs on the borders of the picture.

int	mb_lmin
	minimum MB lagrange multipler

int	mb_lmax
	maximum MB lagrange multipler

int	me_penalty_compensation

int	bidir_refine

int	brd_scale

int	keyint_min
	minimum GOP size

int	refs
	number of reference frames

int	chromaoffset
	chroma qp offset from luma

int	scenechange_factor
	Multiplied by qscale for each frame and added to scene_change_score.

int	mv0_threshold
	Note: Value depends upon the compare function used for fullpel ME.

int	b_sensitivity
	Adjust sensitivity of b_frame_strategy 1.

enum AVColorPrimaries	color_primaries
	Chromaticity coordinates of the source primaries.

enum AVColorTransferCharacteristic	color_trc
	Color Transfer Characteristic.

enum AVColorSpace	colorspace
	YUV colorspace type.

enum AVColorRange	color_range
	MPEG vs JPEG YUV range.

enum AVChromaLocation	chroma_sample_location
	This defines the location of chroma samples.

int	slices
	Number of slices.

enum AVFieldOrder	field_order
	Field order.

int	sample_rate
	samples per second

int	channels
	number of audio channels

enum AVSampleFormat	sample_fmt
	audio sample format

int	frame_size
	Number of samples per channel in an audio frame.

int	frame_number
	Frame counter, set by libavcodec.

int	block_align
	number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.

int	cutoff
	Audio cutoff bandwidth (0 means "automatic")

attribute_deprecated int	request_channels
	Decoder should decode to this many channels if it can (0 for default)

uint64_t	channel_layout
	Audio channel layout.

uint64_t	request_channel_layout
	Request decoder to use this channel layout if it can (0 for default)

enum AVAudioServiceType	audio_service_type
	Type of service that the audio stream conveys.

enum AVSampleFormat	request_sample_fmt
	desired sample format

attribute_deprecated int(*	get_buffer )(struct AVCodecContext c, AVFrame pic)
	Called at the beginning of each frame to get a buffer for it.

attribute_deprecated void(*	release_buffer )(struct AVCodecContext c, AVFrame pic)
	Called to release buffers which were allocated with get_buffer.

attribute_deprecated int(*	reget_buffer )(struct AVCodecContext c, AVFrame pic)
	Called at the beginning of a frame to get cr buffer for it.

int(*	get_buffer2 )(struct AVCodecContext s, AVFrame frame, int flags)
	This callback is called at the beginning of each frame to get data buffer(s) for it.

int	refcounted_frames
	If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted and are valid indefinitely.

float	qcompress
	amount of qscale change between easy & hard scenes (0.0-1.0)

float	qblur
	amount of qscale smoothing over time (0.0-1.0)

int	qmin
	minimum quantizer

int	qmax
	maximum quantizer

int	max_qdiff
	maximum quantizer difference between frames

float	rc_qsquish
	ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.

float	rc_qmod_amp

int	rc_qmod_freq

int	rc_buffer_size
	decoder bitstream buffer size

int	rc_override_count
	ratecontrol override, see RcOverride

RcOverride *	rc_override

const char *	rc_eq
	rate control equation

int	rc_max_rate
	maximum bitrate

int	rc_min_rate
	minimum bitrate

float	rc_buffer_aggressivity

float	rc_initial_cplx
	initial complexity for pass1 ratecontrol

float	rc_max_available_vbv_use
	Ratecontrol attempt to use, at maximum, of what can be used without an underflow.

float	rc_min_vbv_overflow_use
	Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.

int	rc_initial_buffer_occupancy
	Number of bits which should be loaded into the rc buffer before decoding starts.

int	coder_type
	coder type

int	context_model
	context model

int	lmin
	minimum Lagrange multiplier

int	lmax
	maximum Lagrange multiplier

int	frame_skip_threshold
	frame skip threshold

int	frame_skip_factor
	frame skip factor

int	frame_skip_exp
	frame skip exponent

int	frame_skip_cmp
	frame skip comparison function

int	trellis
	trellis RD quantization

int	min_prediction_order

int	max_prediction_order

int64_t	timecode_frame_start
	GOP timecode frame start number.

void(*	rtp_callback )(struct AVCodecContext avctx, void data, int size, int mb_nb)

int	rtp_payload_size

int	mv_bits

int	header_bits

int	i_tex_bits

int	p_tex_bits

int	i_count

int	p_count

int	skip_count

int	misc_bits

int	frame_bits
	number of bits used for the previously encoded frame

char *	stats_out
	pass1 encoding statistics output buffer

char *	stats_in
	pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.

int	workaround_bugs
	Work around bugs in encoders which sometimes cannot be detected automatically.

int	strict_std_compliance
	strictly follow the standard (MPEG4, ...).

int	error_concealment
	error concealment flags

int	debug
	debug

int	debug_mv
	debug Code outside libavcodec should access this field using AVOptions

int	err_recognition
	Error recognition; may misdetect some more or less valid parts as errors.

int64_t	reordered_opaque
	opaque 64bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque

struct AVHWAccel *	hwaccel
	Hardware accelerator in use.

void *	hwaccel_context
	Hardware accelerator context.

uint64_t	error [AV_NUM_DATA_POINTERS]
	error

int	dct_algo
	DCT algorithm, see FF_DCT_* below.

int	idct_algo
	IDCT algorithm, see FF_IDCT_* below.

int	bits_per_coded_sample
	bits per sample/pixel from the demuxer (needed for huffyuv).

int	bits_per_raw_sample
	Bits per sample/pixel of internal libavcodec pixel/sample format.

int	lowres
	low resolution decoding, 1-> 1/2 size, 2->1/4 size

AVFrame *	coded_frame
	the picture in the bitstream

int	thread_count
	thread count is used to decide how many independent tasks should be passed to execute()

int	thread_type
	Which multithreading methods to use.

int	active_thread_type
	Which multithreading methods are in use by the codec.

int	thread_safe_callbacks
	Set by the client if its custom get_buffer() callback can be called synchronously from another thread, which allows faster multithreaded decoding.

int(*	execute )(struct AVCodecContext c, int(func)(struct AVCodecContext c2, void arg), void arg2, int ret, int count, int size)
	The codec may call this to execute several independent things.

int(*	execute2 )(struct AVCodecContext c, int(func)(struct AVCodecContext c2, void arg, int jobnr, int threadnr), void arg2, int ret, int count)
	The codec may call this to execute several independent things.

attribute_deprecated void *	thread_opaque

int	nsse_weight
	noise vs.

int	profile
	profile

int	level
	level

enum AVDiscard	skip_loop_filter
	Skip loop filtering for selected frames.

enum AVDiscard	skip_idct
	Skip IDCT/dequantization for selected frames.

enum AVDiscard	skip_frame
	Skip decoding for selected frames.

uint8_t *	subtitle_header
	Header containing style information for text subtitles.

int	subtitle_header_size

attribute_deprecated int	error_rate

attribute_deprecated AVPacket *	pkt

uint64_t	vbv_delay
	VBV delay coded in the last frame (in periods of a 27 MHz clock).

int	side_data_only_packets
	Encoding only.

AVRational	pkt_timebase
	Timebase in which pkt_dts/pts and AVPacket.dts/pts are.

const AVCodecDescriptor *	codec_descriptor
	AVCodecDescriptor Code outside libavcodec should access this field using: av_codec_{get,set}_codec_descriptor(avctx)

int64_t	pts_correction_num_faulty_pts
	Current statistics for PTS correction.

int64_t	pts_correction_num_faulty_dts
	Number of incorrect PTS values so far.

int64_t	pts_correction_last_pts
	Number of incorrect DTS values so far.

int64_t	pts_correction_last_dts
	PTS of the last frame.

char *	sub_charenc
	DTS of the last frame.

int	sub_charenc_mode
	Subtitles character encoding mode.

int	skip_alpha
	Skip processing alpha if supported by codec.

int	seek_preroll
	Number of samples to skip after a discontinuity.

uint16_t *	chroma_intra_matrix
	custom intra quantization matrix Code outside libavcodec should access this field using av_codec_g/set_chroma_intra_matrix()

Detailed Description

main external API structure.

New fields can be added to the end with minor version bumps. Removal, reordering and changes to existing fields require a major version bump. Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user applications. sizeof(AVCodecContext) must not be used outside libav*.

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_audio.c, filtering_video.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 1213 of file avcodec.h.

Field Documentation

const AVClass* AVCodecContext::av_class

information on struct for av_log

set by avcodec_alloc_context3

Definition at line 1218 of file avcodec.h.

Referenced by avcodec_get_context_defaults3().

int AVCodecContext::log_level_offset

Definition at line 1219 of file avcodec.h.

enum AVMediaType AVCodecContext::codec_type

Examples:: transcoding.c.

Definition at line 1221 of file avcodec.h.

Referenced by add_av_stream(), add_codec(), add_dstream(), add_input_streams(), add_metadata_from_renditions(), adp_read_header(), adts_aac_read_header(), adx_read_header(), aea_read_header(), afc_read_header(), aiff_write_header(), aiff_write_packet(), amr_read_header(), apc_read_header(), ape_read_header(), ape_tag_read_field(), aqt_read_header(), asf_parse_packet(), asf_read_header(), asf_read_picture(), asf_read_stream_properties(), asf_write_header1(), asf_write_packet(), ass_read_header(), ast_read_header(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_find_default_stream_index(), avcodec_default_get_buffer2(), avcodec_default_release_buffer(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avf_read_header(), avformat_find_stream_info(), avformat_match_stream_specifier(), avi_read_header(), avi_read_seek(), avi_sync(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avisynth_read_packet(), avisynth_read_seek(), avpriv_dv_init_demux(), avr_read_header(), avs_read_packet(), bfi_read_header(), bmv_read_header(), build_feed_streams(), build_frame_code(), caca_write_header(), cdata_read_header(), cdxl_read_packet(), celt_header(), check_packet(), choose_decoder(), choose_encoder(), cin_read_header(), cine_read_header(), compute_bandwidth(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), configure_input_audio_filter(), configure_input_video_filter(), configure_output_audio_filter(), create_audio_stream(), create_new_audio_stream(), create_stream(), daud_header(), dc1394_read_common(), decode_stream_header(), dfa_read_header(), dirac_header(), do_streamcopy(), do_video_stats(), dsf_read_header(), dshow_add_device(), dtshd_read_header(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), ea_read_header(), enable_tracks(), encode_write_frame(), epaf_read_header(), estimate_timings_from_pts(), fbdev_read_header(), fbdev_write_header(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_compute_frame_duration(), ff_decklink_write_header(), ff_decklink_write_packet(), ff_flac_parse_picture(), ff_get_wav_header(), ff_id3v2_parse_apic(), ff_img_read_header(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_parse_mpeg2_descriptor(), ff_parse_specific_params(), ff_pixblockdsp_init(), ff_raw_audio_read_header(), ff_raw_data_read_header(), ff_raw_video_read_header(), ff_rfps_calculate(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_spdif_read_packet(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), filter_codec_opts(), find_decoder(), find_stream(), flac_header(), flac_read_header(), flush_encoders(), flv_data_packet(), flv_read_metabody(), flv_read_packet(), flv_write_header(), flv_write_packet(), flv_write_trailer(), force_codec_ids(), frm_read_header(), g722_read_header(), g723_1_init(), g729_read_header(), gdigrab_read_header(), get_aiff_header(), get_attachment(), get_bit_rate(), get_buffer_internal(), get_ost_filters(), get_sindex(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_read_header(), gxf_compare_field_nb(), gxf_interleave_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_packet(), handle_file(), has_codec_parameters(), hds_write_header(), hds_write_packet(), hls_write_header(), hls_write_packet(), hnm_read_header(), http_prepare_data(), idcin_read_header(), iff_read_header(), iff_read_packet(), ilbc_read_header(), init_filter(), init_filters(), init_input_filter(), init_muxer(), init_pts(), init_stream(), interleave_compare_dts(), ipmovie_read_header(), ipod_get_codec_tag(), ircam_read_header(), is_intra_only(), ism_write_header(), ism_write_packet(), iss_read_header(), ivf_write_header(), jacosub_read_header(), lavfi_read_header(), lmlm4_read_header(), loas_read_header(), log_slave(), lrc_read_header(), lrc_write_header(), lvf_read_header(), lxf_read_header(), m4sl_cb(), main(), matroska_parse_tracks(), matroska_read_header(), microdvd_read_header(), mkv_write_attachments(), mkv_write_codecprivate(), mkv_write_cues(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_track(), mmf_read_header(), modplug_read_header(), mov_build_index(), mov_codec_id(), mov_create_chapter_track(), mov_create_timecode_track(), mov_finalize_stsd_codec(), mov_get_codec_tag(), mov_read_covr(), mov_read_hdlr(), mov_read_header(), mov_read_stss(), mov_read_trak(), mov_read_trun(), mov_write_audio_tag(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_iods_tag(), mov_write_isml_manifest(), mov_write_minf_tag(), mov_write_single_packet(), mov_write_stbl_tag(), mov_write_stsd_tag(), mov_write_stts_tag(), mov_write_tfhd_tag(), mov_write_tkhd_tag(), mov_write_trak_tag(), movie_common_init(), movie_config_output_props(), movie_push_frame(), movie_query_formats(), mp3_read_header(), mp4_get_codec_tag(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), mpeg_parse_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mxf_handle_small_eubc(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_parse_structural_metadata(), mxf_read_packet(), mxf_read_packet_old(), mxf_read_seek(), mxf_write_common_fields(), mxf_write_header(), mxf_write_packet(), mxg_read_header(), nc_read_header(), new_audio_stream(), new_output_stream(), new_stream(), new_subtitle_stream(), nist_read_header(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogg_read_seek(), ogg_write_header(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_input_file(), open_input_stream(), open_output_file(), opengl_write_header(), opt_map_channel(), opt_target(), opus_header(), output_packet(), parse_ffconfig(), parse_packet(), parse_strk(), parse_vtrk(), pcm_read_header(), pjs_read_header(), pmp_header(), pmt_cb(), print_final_stats(), print_report(), process_frame(), process_input(), pulse_read_header(), pulse_write_header(), put_frame(), pva_read_header(), pvf_read_header(), qcp_read_header(), qt_rtp_parse_packet(), qtkit_read_header(), r3d_read_red1(), rawvideo_read_header(), read_desc_chunk(), read_ffserver_streams(), read_frame(), read_header(), read_header_gme(), read_index(), read_packet(), realtext_read_header(), redspark_read_header(), reget_buffer_internal(), release_delayed_buffers(), report_new_stream(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_dts(), rm_read_header(), rm_write_header(), rm_write_packet(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rsd_read_header(), rso_read_header(), rtp_write_header(), rv10_write_header(), sami_read_header(), sbg_read_header(), sdl_write_header(), sdr2_read_header(), seg_write_header(), select_reference_stream(), seq_read_header(), set_codec_from_probe_data(), show_frame(), show_packet(), show_stream(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smjpeg_write_packet(), smush_read_header(), sol_read_header(), sox_read_header(), speex_header(), srt_read_header(), srt_write_header(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), sub2video_prepare(), subviewer1_read_header(), subviewer_read_header(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), tak_read_header(), tedcaptions_read_header(), theora_header(), thp_read_header(), tmcd_is_referenced(), tmv_read_header(), transcode_init(), try_decode_frame(), tta_read_header(), txd_read_header(), update_frame_pool(), update_stream_timings(), v4l2_read_header(), vc1t_read_header(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), vorbis_header(), vp8_header(), vplayer_read_header(), vqf_read_header(), wc3_read_header(), webvtt_read_header(), write_adaptation_set(), write_frame(), write_header(), write_manifest(), write_stream_codec(), write_stream_codec_info(), write_stream_data(), write_streamheader(), write_streaminfo(), write_timestamp(), wsaud_read_header(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xv_write_header(), yop_read_header(), and yuv4_read_header().

struct AVCodec* AVCodecContext::codec

Examples:: muxing.c, remuxing.c, transcode_aac.c, and transcoding.c.

Definition at line 1222 of file avcodec.h.

Referenced by a64_write_header(), a64multi_encode_init(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), alloc_frame_buffer(), apply_param_change(), ass_encode_frame(), avcodec_close(), avcodec_copy_context(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio2(), avcodec_encode_subtitle(), avcodec_encode_video2(), avcodec_flush_buffers(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), close_connection(), codec_child_next(), config(), context_to_name(), copy_frame(), decode_end(), decode_frame(), decode_init(), decode_nal_units(), do_video_out(), dpcm_decode_frame(), dpcm_decode_init(), eightsvx_decode_init(), encode_init(), er_supported(), ff_frame_thread_encoder_init(), ff_frame_thread_free(), ff_frame_thread_init(), ff_get_format(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_execute_decode_slices(), ff_h264_field_end(), ff_h264_set_parameter_from_sps(), ff_init_buffer_info(), ff_jpeg2000_init_component(), ff_mjpeg_decode_init(), ff_mjpeg_encode_picture_header(), ff_mjpeg_init_hvsample(), ff_MPV_encode_init(), ff_MPV_frame_start(), ff_print_debug_info2(), ff_thread_can_start_frame(), ff_thread_flush(), ff_vc1_parse_frame_header(), ff_vp56_init_context(), ff_wma_init(), find_decoder(), flush_encoder(), flush_encoders(), frame_size_alloc(), frame_worker_thread(), get_category(), get_nb_samples(), get_pixel_format(), h261_decode_init(), h264_frame_start(), init(), main(), movie_common_init(), mpeg_decode_init(), open_audio(), open_input_file(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), process_frame(), reap_filters(), receive_frame(), show_stream(), srt_decode_frame(), srt_encode_frame(), srt_end_cb(), srt_move_cb(), submit_packet(), thread_get_buffer_internal(), try_decode_frame(), update_context_from_thread(), vaapi_mpeg4_start_frame(), validate_thread_parameters(), vc1_decode_frame(), vc1_decode_init(), vdadec_init(), vdpau_mpeg4_start_frame(), vp6_decode_init(), vp78_decode_frame(), vp78_decode_init(), wma_decode_init(), and write_frame().

attribute_deprecated char AVCodecContext::codec_name[32]

Deprecated:: this field is not used for anything in libavcodec

Definition at line 1228 of file avcodec.h.

Referenced by ico_check_attributes().

enum AVCodecID AVCodecContext::codec_id

Examples:: demuxing_decoding.c, muxing.c, and transcoding.c.

Definition at line 1230 of file avcodec.h.

Referenced by add_av_stream(), add_input_streams(), add_stream(), adp_read_header(), adts_aac_read_header(), adx_read_header(), aea_read_header(), afc_read_header(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), amf_parse_object(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amr_read_packet(), apc_read_header(), ape_read_header(), ape_tag_read_field(), aqt_read_header(), asf_parse_packet(), asf_read_picture(), asf_read_stream_properties(), asf_write_header1(), ass_read_header(), ast_read_header(), ast_write_header(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_get_audio_frame_duration(), av_vdpau_get_profile(), avcodec_align_dimensions2(), avcodec_encode_audio(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avf_read_header(), avformat_find_stream_info(), avi_read_header(), avi_write_header(), avi_write_packet(), avi_write_trailer(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avpriv_dv_init_demux(), avpriv_mpa_decode_header(), avr_read_header(), avs_read_packet(), bfi_read_header(), bitstream_switching(), bmv_read_header(), caca_write_header(), caf_write_header(), caf_write_trailer(), cdata_read_header(), cdxl_read_packet(), celt_header(), choose_decoder(), choose_encoder(), choose_pix_fmts(), choose_pixel_fmt(), cin_read_header(), cine_read_header(), clone_tables(), close_input_file(), commit_bitstream_and_slice_buffer(), compute_pkt_fields(), compute_status(), copy_stream_props(), create_audio_stream(), create_new_audio_stream(), cyuv_decode_frame(), daud_header(), dc1394_read_common(), decode_end(), decode_frame(), decode_init(), decode_mb(), decode_slice(), decode_stream_header(), decode_video(), detect_stream_specific(), determinable_frame_size(), dfa_read_header(), dirac_header(), do_subtitle_out(), dsf_read_header(), dshow_add_device(), dtshd_read_header(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), dxva2_create_decoder(), dxva2_get_decoder_configuration(), dxva2_init(), dxva2_vc1_decode_slice(), ea_read_header(), encode_frame(), encode_init(), encode_mb(), epaf_read_header(), estimate_best_b_count(), extract_mpeg4_header(), fbdev_read_header(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_audio_interleave_init(), ff_draw_horiz_band(), ff_dsputil_init_pix_mmx(), ff_er_frame_end(), ff_flac_parse_picture(), ff_frame_thread_encoder_init(), ff_get_audio_frame_size(), ff_get_format(), ff_get_wav_header(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_h264_set_parameter_from_sps(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_img_read_header(), ff_img_read_packet(), ff_init_me(), ff_load_image(), ff_mjpeg_decode_sof(), ff_mjpeg_encode_picture_header(), ff_mjpeg_find_marker(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_MPV_encode_init(), ff_parse_mpeg2_descriptor(), ff_pcm_read_seek(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_psy_init(), ff_psy_preprocess_init(), ff_put_wav_header(), ff_raw_audio_read_header(), ff_raw_data_read_header(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_rtp_parse_open(), ff_rv34_decode_init(), ff_spdif_read_packet(), ff_thread_decode_frame(), ff_vc1_decode_init_alloc_tables(), ff_vc1_parse_frame_header(), ff_voc_get_packet(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffserver_opt_preset(), fill_slice(), film_read_header(), filter_packet(), find_compressor(), find_expected_header(), find_stream_in_feed(), flac_header(), flac_read_header(), flac_read_timestamp(), flac_write_header(), flv_data_packet(), flv_read_packet(), flv_same_audio_codec(), flv_same_video_codec(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), force_codec_ids(), frame_worker_thread(), frm_read_header(), g722_read_header(), g723_1_init(), g729_read_header(), gdigrab_read_header(), get_aiff_header(), get_attachment(), get_audio_flags(), get_bit_rate(), get_codec_data(), get_packet_header(), get_private_data(), get_sindex(), get_video_private_data(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_decode_frame(), gsm_init(), gsm_parse(), gsm_read_header(), guess_mv(), gxf_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_packet(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), handle_file(), handle_rstn(), has_codec_parameters(), has_decode_delay_been_guessed(), hnm_read_header(), ico_check_attributes(), ico_write_packet(), ico_write_trailer(), idcin_read_header(), iff_read_header(), ilbc_read_header(), ilbc_write_header(), imc_decode_block(), imc_decode_init(), imx_dump_header(), init_input_stream(), init_muxer(), ipmovie_read_header(), ipod_get_codec_tag(), ircam_read_header(), ircam_write_header(), is_intra_more_likely(), is_intra_only(), ism_write_header(), iss_read_header(), ivf_write_header(), ivi_decode_blocks(), jacosub_read_header(), jpeg_table_header(), latm_write_header(), latm_write_packet(), lavfi_read_header(), libgsm_decode_init(), libgsm_encode_frame(), libgsm_encode_init(), libgsm_flush(), lmlm4_read_header(), loas_read_header(), log_slave(), lrc_read_header(), lrc_write_header(), lvf_read_header(), lxf_read_header(), m4sl_cb(), mace_decode_frame(), matroska_parse_block(), matroska_parse_frame(), matroska_parse_rm_audio(), matroska_parse_tracks(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mjpega_dump_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mkv_write_header(), mkv_write_native_codecprivate(), mkv_write_packet_internal(), mkv_write_track(), mmf_read_header(), modplug_read_header(), mov_codec_id(), mov_finalize_stsd_codec(), mov_find_codec_tag(), mov_get_codec_tag(), mov_parse_stsd_audio(), mov_parse_stsd_video(), mov_read_ares(), mov_read_covr(), mov_read_enda(), mov_read_extradata(), mov_read_hdlr(), mov_read_header(), mov_read_trak(), mov_read_wave(), mov_write_audio_tag(), mov_write_chan_tag(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_packet(), mov_write_subtitle_tag(), mov_write_trailer(), mov_write_uuidprof_tag(), mov_write_video_tag(), mov_write_wave_tag(), mp3_read_header(), mp4_get_codec_tag(), mpc8_read_header(), mpc_read_header(), mpeg1_decode_sequence(), mpeg_decode_postinit(), mpeg_decode_sequence_extension(), mpeg_get_pixelformat(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mpegvideo_extract_headers(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mvc_decode_frame(), mvc_decode_init(), mxf_handle_small_eubc(), mxf_parse_structural_metadata(), mxf_set_audio_pts(), mxf_write_cdci_common(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_packet(), mxg_read_header(), nc_read_header(), nist_read_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nut_read_header(), nuv_header(), ogg_buffer_data(), ogg_validate_keyframe(), ogg_write_header(), ogg_write_packet_internal(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_codec_context(), open_input_file(), open_output_file(), open_stream(), opengl_write_header(), opus_header(), parse(), parse_dsd_prop(), parse_ffconfig(), parse_fmtp(), parse_media_type(), parse_mpeg1waveformatex(), parse_strk(), parse_video_var(), parse_vtrk(), parse_waveformatex(), pcm_decode_frame(), pcm_decode_init(), pcm_read_header(), pjs_read_header(), pmp_header(), probe_codec(), pulse_read_header(), pulse_write_header(), put_xiph_codecpriv(), pva_read_header(), pvf_read_header(), qcp_read_header(), qdm2_parse_packet(), qtkit_read_header(), r3d_read_red1(), rawvideo_read_header(), rdt_parse_packet(), read_access_unit(), read_desc_chunk(), read_ffserver_streams(), read_frame(), read_frame_internal(), read_header(), read_header_gme(), read_kuki_chunk(), read_major_sync(), read_matrix_params(), read_packet(), read_restart_header(), realtext_read_header(), redspark_read_header(), remove_extradata(), rl2_read_header(), rm_ac3_swap_bytes(), rm_read_audio_stream_info(), rm_write_audio(), roq_read_packet(), rpl_read_header(), rsd_read_header(), rsd_read_packet(), rso_read_header(), rso_write_header(), rtp_write_header(), rtp_write_packet(), rv10_decode_init(), rv10_write_header(), rv34_parse(), sami_read_header(), sbg_read_header(), sdl_write_header(), sdp_parse_fmtp_config_h264(), sdr2_read_header(), seek_frame_generic(), segment_mux_init(), select_from_pts_buffer(), seq_read_header(), set_codec_from_probe_data(), set_mv_strides(), setup_find_stream_info_opts(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), sox_write_trailer(), sp5x_decode_frame(), spdif_write_header(), speex_header(), srt_read_header(), srt_write_header(), srt_write_packet(), str_read_packet(), stream_component_open(), subviewer1_read_header(), subviewer_read_header(), svq3_parse_packet(), swf_read_packet(), swf_write_header(), swf_write_video(), tak_read_header(), tb_unreliable(), tedcaptions_read_header(), theora_header(), thp_read_header(), tmv_read_header(), transcode_init(), try_decode_frame(), tta_read_header(), txd_read_header(), v408_decode_frame(), v408_encode_frame(), v4l2_read_header(), vaapi_vc1_decode_slice(), validate_codec_tag(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vcr2_init_sequence(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), voc_write_header(), vorbis_header(), vp3_decode_init(), vp8_header(), vplayer_read_header(), vpx_init(), vqf_read_header(), wc3_read_header(), webvtt_read_header(), write_adaptation_set(), write_header(), write_packet(), write_stream_codec_info(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), wv_write_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xv_write_header(), xvid_encode_init(), xwma_read_header(), yop_read_header(), yuv4_read_header(), and yuv4_write_header().

unsigned int AVCodecContext::codec_tag

fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs. A demuxer should set this to what is stored in the field used to identify the codec. If there are multiple such fields in a container then the demuxer should choose the one which maximizes the information about the used codec. If the codec tag field in a container is larger than 32 bits then the demuxer should remap the longer ID to 32 bits with a table or other structure. Alternatively a new extra_codec_tag + size could be added but for this a clear advantage must be demonstrated first.

encoding: Set by user, if not then the default based on codec_id will be used.
decoding: Set by user, will be converted to uppercase by libavcodec during init.

Examples:: remuxing.c.

Definition at line 1245 of file avcodec.h.

Referenced by a64multi_encode_init(), aasc_decode_frame(), add_input_streams(), aiff_write_header(), amr_read_header(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), av_get_audio_frame_duration(), avcodec_string(), avformat_find_stream_info(), avi_read_header(), avi_read_idx1(), avi_write_header(), avi_write_packet(), avpriv_dv_frame_profile2(), cdata_read_header(), cdxl_read_packet(), cin_read_header(), cine_read_header(), daud_header(), decode_frame(), decode_init(), decode_stream_header(), dpcm_decode_frame(), dpcm_decode_init(), dshow_add_device(), ea_read_header(), encode_init(), export_orphan_timecode(), ff_get_wav_header(), ff_h264_decode_seq_parameter_set(), ff_mjpeg_decode_init(), ff_mjpeg_decode_sos(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_MPV_common_init(), ff_parse_mpeg2_descriptor(), ff_put_bmp_header(), ff_put_wav_header(), ff_rm_read_mdpr_codecdata(), ff_update_duplicate_context(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), flv_same_audio_codec(), flv_same_video_codec(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), frm_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), handle_file(), hnm_read_header(), idcin_read_header(), iff_read_header(), iff_read_packet(), init_duplicate_context(), init_muxer(), init_stream(), ipmovie_read_header(), ipod_get_codec_tag(), ivf_write_header(), libspeex_decode_init(), lvf_read_header(), lxf_read_header(), main(), matroska_parse_tracks(), mjpeg_decode_com(), mkv_write_codecprivate(), mkv_write_native_codecprivate(), mov_codec_id(), mov_create_timecode_track(), mov_finalize_stsd_codec(), mov_get_codec_tag(), mov_get_mpeg2_xdcam_codec_tag(), mov_get_rawvideo_codec_tag(), mov_parse_stsd_audio(), mov_parse_stsd_data(), mov_parse_stsd_subtitle(), mov_parse_stsd_video(), mov_read_ares(), mov_read_header(), mov_read_trak(), mov_write_gmhd_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_ms_tag(), mov_write_stbl_tag(), mov_write_stsd_tag(), mp4_get_codec_tag(), mpeg_decode_frame(), mpegts_set_stream_info(), msnwc_tcp_read_header(), new_output_stream(), nsv_parse_NSVs_header(), nut_read_header(), ogm_header(), oma_read_header(), oma_write_header(), on2avc_decode_init(), parse_ffconfig(), parse_strk(), parse_videoinfoheader2(), parse_waveformatex(), pmt_cb(), prores_encode_init(), raw_encode(), raw_encode_init(), raw_init_decoder(), read_desc_chunk(), read_header(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rsd_read_header(), rso_read_header(), rso_write_header(), rv10_write_header(), scan_file(), segment_mux_init(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), smush_read_header(), sol_read_header(), str_read_packet(), tb_unreliable(), thp_read_header(), transcode_init(), utvideo_decode_init(), utvideo_encode_init(), v4l2_read_header(), validate_codec_tag(), vivo_read_header(), vmd_read_header(), voc_write_header(), voc_write_packet(), vp3_decode_init(), wc3_read_header(), write_streamheader(), wsvqa_read_header(), xmv_read_header(), xsub_encoder_init(), xvid_encode_init(), xwma_read_header(), zero12v_decode_frame(), and zero12v_decode_init().

unsigned int AVCodecContext::stream_codec_tag

fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs.

encoding: unused
decoding: Set by user, will be converted to uppercase by libavcodec during init.

Definition at line 1253 of file avcodec.h.

Referenced by avi_read_header(), ff_h263_decode_init(), and ff_MPV_common_init().

void* AVCodecContext::priv_data

Examples:: decoding_encoding.c.

Definition at line 1255 of file avcodec.h.

struct AVCodecInternal* AVCodecContext::internal

Private context used for internal data.

Unlike priv_data, this is not codec-specific. It is used in general libavcodec functions.

Definition at line 1263 of file avcodec.h.

Referenced by add_metadata_from_side_data(), audio_get_buffer(), avcodec_close(), avcodec_copy_context(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio(), avcodec_encode_audio2(), avcodec_encode_video2(), avcodec_flush_buffers(), avcodec_is_open(), avcodec_open2(), decode(), decode_fill(), decode_init(), decode_init_thread_copy(), ff_alloc_entries(), ff_alloc_packet2(), ff_frame_thread_encoder_free(), ff_frame_thread_encoder_init(), ff_frame_thread_free(), ff_frame_thread_init(), ff_get_format(), ff_h264_decode_init(), ff_init_buffer_info(), ff_reset_entries(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), ff_slice_thread_free(), ff_slice_thread_init(), ff_thread_await_progress(), ff_thread_await_progress2(), ff_thread_can_start_frame(), ff_thread_decode_frame(), ff_thread_finish_setup(), ff_thread_flush(), ff_thread_get_format(), ff_thread_release_buffer(), ff_thread_report_progress(), ff_thread_report_progress2(), ff_thread_video_encode_frame(), ff_vda_output_callback(), frame_worker_thread(), hevc_decode_init(), libopus_decode_init(), libopus_flush(), mimic_decode_end(), mimic_decode_init(), png_dec_init(), thread_execute(), thread_execute2(), thread_get_buffer_internal(), update_context_from_thread(), update_frame_pool(), vda_h264_decode_slice(), vda_h264_end_frame(), vda_h264_start_frame(), vda_h264_uninit(), vda_old_h264_decode_slice(), vda_old_h264_end_frame(), vda_old_h264_start_frame(), video_get_buffer(), vp3_decode_end(), vp3_decode_init(), vp78_decode_init(), vp9_decode_init(), and worker().

void* AVCodecContext::opaque

Private data of the user, can be used to carry app specific stuff.

encoding: Set by user.
decoding: Set by user.

Definition at line 1270 of file avcodec.h.

Referenced by dxva2_alloc(), dxva2_create_decoder(), dxva2_destroy_decoder(), dxva2_get_buffer(), dxva2_get_decoder_configuration(), dxva2_init(), dxva2_retrieve_data(), dxva2_uninit(), get_buffer(), get_format(), init_input_stream(), update_context_from_user(), vda_init(), vda_retrieve_data(), vda_uninit(), vdpau_alloc(), vdpau_get_buffer(), vdpau_init(), vdpau_retrieve_data(), and vdpau_uninit().

int AVCodecContext::bit_rate

the average bitrate

encoding: Set by user; unused for constant quantizer encoding.
decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.

Examples:: decoding_encoding.c, and muxing.c.

Definition at line 1277 of file avcodec.h.

Referenced by aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), add_av_stream(), add_codec(), add_stream(), aea_read_header(), aiff_read_header(), amf_parse_object(), amr_read_packet(), amr_wb_encode_frame(), amr_wb_encode_init(), apc_read_header(), asf_read_header(), asf_write_header1(), audio_encode_example(), av_find_best_stream(), avcodec_open2(), avformat_new_stream(), avi_write_header(), avpriv_dv_init_demux(), avpriv_dv_produce_packet(), bfi_read_header(), calculate_bitrate(), check_stream_max_drift(), cin_read_header(), compute_bandwidth(), compute_status(), daud_header(), dc1394_read_common(), dca_decode_frame(), decode_frame(), decode_ppc(), dv_extract_audio_info(), dv_extract_video_info(), ea_read_header(), encode_init(), estimate_timings_from_bit_rate(), Faac_encode_init(), fbdev_read_header(), ff_aac_ac3_parse(), ff_adx_decode_header(), ff_dnxhd_find_cid(), ff_dv_offset_reset(), ff_get_audio_frame_size(), ff_get_wav_header(), ff_MPV_encode_init(), ff_parse_specific_params(), ff_pcm_read_seek(), ff_put_wav_header(), ff_voc_get_packet(), ff_wma_init(), ff_xvid_rate_control_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), find_stream_in_feed(), flv_write_header(), gdigrab_read_header(), get_aiff_header(), get_bit_rate(), get_mode(), get_sindex(), grab_read_header(), gsm_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), handle_file(), hds_write_header(), idcin_read_header(), iff_read_header(), ilbc_read_header(), init_bitstream_params(), ipmovie_read_header(), ism_write_header(), iss_read_header(), lame_window_init(), libgsm_encode_init(), libopus_configure_encoder(), libopus_encode_init(), libschroedinger_encode_init(), libshine_encode_init(), libspeex_decode_frame(), libvorbis_setup(), libx265_encode_init(), lxf_read_header(), matroska_parse_tracks(), metasound_decode_init(), mlp_parse(), mmf_read_header(), modify_current_stream(), mov_build_index(), mov_read_header(), mov_write_esds_tag(), mov_write_isml_manifest(), mov_write_uuidprof_tag(), mp3_write_xing(), mp3lame_encode_init(), MPA_encode_init(), mpeg_decode_postinit(), mpeg_mux_init(), mpegaudio_parse(), mpegts_read_header(), mpegvideo_extract_headers(), mtv_read_header(), mxf_write_header(), ogm_dshow_header(), ogm_header(), oma_read_header(), optimum_dist(), optimum_use15_7(), parse_ffconfig(), parse_mpeg1waveformatex(), parse_strk(), pcm_bluray_parse_header(), pcm_dvd_parse_header(), pcm_encode_init(), print_enc_params(), psy_3gpp_init(), psy_3gpp_window(), qcp_read_header(), qdm2_decode_init(), ra144_encode_init(), rawvideo_read_header(), read_desc_chunk(), read_header(), real_parse_asm_rule(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_header(), rm_write_header(), roq_dpcm_encode_init(), roq_read_packet(), rv10_write_header(), s302m_encode_init(), s302m_parse_frame_header(), search_for_quantizers_twoloop(), seq_read_header(), show_stream(), sipr_decoder_init(), sox_read_header(), tmv_read_header(), transcode_init(), twinvq_decode_init(), twolame_encode_init(), v4l2_read_header(), validate_options(), vid_read_packet(), video_encode_example(), vivo_read_header(), vmd_read_header(), vorbis_encode_init(), vorbis_header(), vpx_init(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), write_manifest(), wsaud_read_header(), x11grab_read_header(), X264_frame(), X264_init(), xa_read_header(), XAVS_init(), xmv_read_header(), xvid_encode_init(), xwma_read_header(), and yop_read_header().

int AVCodecContext::bit_rate_tolerance

number of bits the bitstream is allowed to diverge from the reference.

      the reference can be CBR (for CBR pass1) or VBR (for pass2)

encoding: Set by user; unused for constant quantizer encoding.
decoding: unused

Definition at line 1285 of file avcodec.h.

Referenced by add_codec(), ff_MPV_encode_init(), ff_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), parse_ffconfig(), and XAVS_init().

int AVCodecContext::global_quality

Global quality for codecs which cannot change it per frame.

This should be proportional to MPEG-1/2/4 qscale.

encoding: Set by user.
decoding: unused

Definition at line 1293 of file avcodec.h.

Referenced by a64multi_encode_init(), aac_encode_init(), config(), config_props(), do_video_out(), encode_init(), Faac_encode_init(), lame_window_init(), libopenjpeg_encode_init(), libopus_configure_encoder(), libschroedinger_encode_init(), libvorbis_setup(), libwebp_encode_init(), mp3lame_encode_init(), new_output_stream(), optimum_use15_7(), parse_ffconfig(), twolame_encode_init(), vorbis_encode_init(), and X264_init().

int AVCodecContext::compression_level

encoding: Set by user.
decoding: unused

Definition at line 1299 of file avcodec.h.

Referenced by alac_encode_init(), encode_frame(), encode_init(), flac_encode_init(), flashsv2_encode_init(), libopenjpeg_encode_init(), libopus_encode_init(), libwebp_encode_init(), mp3lame_encode_init(), print_enc_params(), and wavpack_encode_init().

int AVCodecContext::flags

CODEC_FLAG_*.

encoding: Set by user.
decoding: Set by user.

Examples:: decoding_encoding.c, muxing.c, remuxing.c, and transcoding.c.

Definition at line 1307 of file avcodec.h.

Referenced by aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_init(), add_input_streams(), add_stream(), amv_encode_picture(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), av_parser_change(), avcodec_encode_video2(), avcodec_string(), comp_block(), config(), config_props(), configure_input_video_filter(), dca_decode_init(), dct_get(), decode_init(), decode_nal_units(), decode_slice_thread(), dnxhd_decode_macroblock(), dnxhd_encode_init(), do_video_out(), do_video_stats(), dsp_init(), dv_guess_dct_mode(), encode_frame(), encode_init(), encode_q_branch(), encode_slice_data(), estimate_best_b_count(), Faac_encode_init(), ff_ac3_encode_init(), ff_ac3_float_encode_init(), ff_celt_init(), ff_dct_common_init(), ff_dnxhd_find_cid(), ff_dsputil_init_pix_mmx(), ff_fmt_convert_init_arm(), ff_fmt_convert_init_ppc(), ff_fmt_convert_init_x86(), ff_frame_thread_encoder_init(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_h264_decode_seq_parameter_set(), ff_hevc_decode_nal_sps(), ff_huffyuv_common_init(), ff_mjpeg_decode_init(), ff_mpegvideoencdsp_init_x86(), ff_MPV_common_init(), ff_MPV_encode_init(), ff_snow_frame_start(), ff_thread_video_encode_frame(), ff_twinvq_decode_init(), ff_vp56_init_context(), ff_wma_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffv1_common_init(), get_cox(), get_flags(), h261_decode_frame(), h264_decode_frame(), idct_put(), imc_decode_init(), init_muxer(), ipvideo_decode_init(), jpeg_put_comments(), lame_window_init(), libschroedinger_encode_init(), libvorbis_encode_init(), libvorbis_setup(), libx265_encode_init(), main(), mimic_decode_init(), mp3lame_encode_init(), mpeg_decode_init(), new_output_stream(), new_video_stream(), on2avc_decode_init(), open_output_file(), parse_ffconfig(), print_report(), ra288_decode_init(), remove_extradata(), render_slice(), rv10_decode_frame(), smvjpeg_decode_init(), stream_component_open(), svq1_decode_frame(), svq1_decode_init(), svq1_encode_init(), svq1_encode_plane(), svq3_decode_init(), tgq_idct_put_mb(), tgq_idct_put_mb_dconly(), tqi_idct_put(), twolame_encode_init(), unpack_dct_coeffs(), update_context_from_user(), validate_thread_parameters(), vble_decode_frame(), vc1_decode_init(), video_decode_example(), vorbis_decode_init(), vorbis_encode_init(), vp3_decode_init(), vp8_encode(), vpx_init(), wmv2_decode_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::flags2

CODEC_FLAG2_*.

encoding: Set by user.
decoding: Set by user.

Definition at line 1314 of file avcodec.h.

Referenced by av_parser_change(), decode_frame(), decode_nal_units(), decode_vui(), dump_extradata(), encode_422_bitstream(), encode_bgra_bitstream(), encode_frame(), encode_gray_bitstream(), encode_init(), encode_plane_bitstream(), ff_h263_decode_frame(), ff_h264_decode_nal(), ff_h264_decode_seq_parameter_set(), ff_h264_decode_slice_header(), ff_hevc_decode_nal_sps(), ff_MPV_common_init(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), h261_decode_frame(), h264_decode_frame(), mov_parse_stsd_data(), mpeg_decode_init(), remove_extradata(), rv10_decode_frame(), stream_component_open(), update_context_from_user(), and validate_thread_parameters().

uint8_t* AVCodecContext::extradata

some codecs need / can use extradata like Huffman tables.

mjpeg: Huffman tables rv10: additional flags mpeg4: global headers (they can be in the bitstream or here) The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger than extradata_size to avoid problems if it is read with the bitstream reader. The bytewise contents of extradata must not depend on the architecture or CPU endianness.

encoding: Set/allocated/freed by libavcodec.
decoding: Set/allocated/freed by user.

Definition at line 1327 of file avcodec.h.

Referenced by a64_write_header(), a64multi_encode_frame(), a64multi_encode_init(), aac_adtstoasc_filter(), aac_decode_frame(), aac_decode_init(), aac_encode_close(), aac_encode_init(), aacPlus_encode_close(), aacPlus_encode_init(), aasc_decode_init(), add_av_stream1(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adts_write_header(), adx_decode_init(), adx_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), alac_encode_close(), alac_encode_init(), alac_set_info(), alloc_buffers(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), asfrtp_parse_sdp_line(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_parser_change(), avcodec_close(), avcodec_copy_context(), avcodec_free_context(), avformat_find_stream_info(), avi_extract_stream_metadata(), avi_read_header(), avpriv_bprint_to_extradata(), avpriv_flac_is_extradata_valid(), avpriv_vorbis_parse_extradata(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), bfi_read_header(), bitstream_switching(), caf_write_header(), celt_header(), cine_read_header(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), copy_stream_props(), decode_chunks(), decode_ext_header(), decode_flush(), decode_header_trees(), decode_init(), decode_init_thread_copy(), detect_stream_specific(), dfa_decode_frame(), dfa_read_header(), dshow_add_device(), dump_attachment(), dump_extradata(), dvbsub_init_decoder(), dvdsub_parse_extradata(), encode_close(), encode_end(), encode_ext_header(), encode_init(), encode_intervals(), extract_header(), extract_mpeg4_header(), Faac_encode_close(), Faac_encode_init(), fdk_aac_decode_init(), ff_alloc_extradata(), ff_free_stream(), ff_generate_avci_extradata(), ff_get_extradata(), ff_get_wav_header(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_MPV_encode_end(), ff_mss12_decode_init(), ff_opus_parse_extradata(), ff_parse_mpeg2_descriptor(), ff_put_bmp_header(), ff_put_wav_header(), ff_rm_read_mdpr_codecdata(), ff_vda_default_init(), ffm_write_header(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flac_header(), flac_read_header(), flac_write_header(), flac_write_trailer(), flic_decode_init(), flv_get_extradata(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), framecrc_write_header(), get_aac_sample_rates(), get_codec_data(), get_nb_samples(), get_private_data(), get_video_private_data(), h264_extradata_to_annexb(), h264_mp4toannexb_filter(), h264_parse(), hevc_decode_extradata(), hevc_decode_init(), hnm_decode_init(), hnm_read_header(), idcin_decode_init(), iff_read_header(), init(), jacosub_write_header(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_write_frame_header(), latm_write_header(), latm_write_packet(), libcelt_dec_init(), libopus_decode_init(), libopus_encode_close(), libopus_encode_init(), libopus_write_header(), libspeex_decode_init(), libvorbis_encode_close(), libvorbis_encode_init(), libx265_encode_init(), matroska_parse_tracks(), matroska_parse_wavpack(), matroska_read_header(), metasound_decode_init(), microdvd_init(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mkv_write_native_codecprivate(), mov_create_chapter_track(), mov_create_dvd_sub_decoder_specific_info(), mov_finalize_stsd_codec(), mov_free(), mov_parse_stsd_data(), mov_read_dvc1(), mov_read_extradata(), mov_read_glbl(), mov_read_strf(), mov_read_targa_y216(), mov_read_wave(), mov_rewrite_dvd_sub_extradata(), mov_text_encode_init(), mov_write_extradata_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_subtitle_tag(), mov_write_tmcd_tag(), mp3_header_decompress(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg4_decode_header(), mpeg_decode_frame(), mpegts_write_pmt(), msrle_decode_init(), msvideo1_decode_init(), mtv_read_header(), mvc_decode_init(), mxf_parse_structural_metadata(), new_stream(), nut_read_header(), ogg_build_opus_headers(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_decode_init(), ogm_header(), oma_read_header(), oma_write_header(), open_output_file(), opus_header(), opus_parse(), parse_fmtp_config(), parse_media_type(), parse_mpeg1waveformatex(), parse_packed_headers(), parse_video_var(), parse_vtrk(), put_audio_specific_config(), put_flac_codecpriv(), put_wv_codecpriv(), put_xiph_codecpriv(), qdm2_decode_init(), qdm2_parse_config(), raw_init_decoder(), read_audio_mux_element(), read_extra_header(), read_gab2_sub(), read_header(), read_kuki_chunk(), read_specific_config(), realtext_read_header(), redspark_read_header(), rl2_decode_init(), rsd_read_header(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), sdp_parse_fmtp_config_h264(), show_stream(), smacker_read_header(), smush_read_header(), smvjpeg_decode_init(), speex_header(), Stagefright_close(), Stagefright_init(), subviewer_read_header(), svq3_decode_init(), svq3_parse_packet(), tak_read_header(), theora_header(), transcode_init(), tta_decode_init(), tta_read_header(), twinvq_decode_init(), uninit(), utvideo_decode_init(), utvideo_encode_close(), utvideo_encode_init(), vc1_decode_init(), vc1test_write_header(), vdadec_init(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_init(), vorbis_header(), vqa_decode_init(), vqf_read_header(), wavesynth_parse_extradata(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_extradata(), write_header(), write_streamheader(), write_trailer(), wsvqa_read_header(), wsvqa_read_packet(), X264_close(), X264_init(), XAVS_close(), XAVS_init(), xmv_process_packet_header(), xvid_encode_close(), xvid_encode_init(), xvid_strip_vol_header(), xwma_read_header(), yop_decode_init(), and yop_read_header().

int AVCodecContext::extradata_size

Definition at line 1328 of file avcodec.h.

Referenced by a64_write_header(), a64multi_encode_init(), aac_adtstoasc_filter(), aac_decode_frame(), aac_decode_init(), aac_encode_init(), aacPlus_encode_init(), aasc_decode_init(), add_av_stream1(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adts_write_header(), adx_decode_init(), adx_read_header(), aiff_write_header(), alac_decode_init(), alac_encode_close(), alac_encode_init(), alac_set_info(), ape_decode_init(), asf_read_stream_properties(), asf_write_header1(), asfrtp_parse_sdp_line(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_parser_change(), avcodec_copy_context(), avcodec_open2(), avformat_find_stream_info(), avi_extract_stream_metadata(), avi_read_header(), avpriv_bprint_to_extradata(), avpriv_flac_is_extradata_valid(), avpriv_vorbis_parse_extradata(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), bfi_read_header(), bitstream_switching(), caf_write_header(), cine_read_header(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), copy_stream_props(), decode_ext_header(), decode_flush(), decode_header_trees(), decode_init(), decode_init_thread_copy(), decode_stream_header(), detect_stream_specific(), dfa_decode_frame(), dshow_add_device(), dump_attachment(), dump_extradata(), dvbsub_init_decoder(), dvdsub_parse_extradata(), encode_close(), encode_ext_header(), encode_init(), extract_header(), extract_mpeg4_header(), Faac_encode_init(), fdk_aac_decode_init(), ff_alloc_extradata(), ff_get_extradata(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_write_packet(), ff_mp4_read_dec_config_descr(), ff_mss12_decode_init(), ff_opus_parse_extradata(), ff_parse_mpeg2_descriptor(), ff_put_bmp_header(), ff_put_wav_header(), ff_rtp_send_aac(), ff_rtp_send_latm(), ff_vda_default_init(), ffm_write_header(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flac_header(), flac_read_header(), flac_write_header(), flic_decode_init(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), framecrc_write_header(), get_aac_sample_rates(), get_codec_data(), get_private_data(), get_video_private_data(), h264_extradata_to_annexb(), h264_mp4toannexb_filter(), h264_parse(), hevc_decode_extradata(), hevc_decode_init(), hnm_decode_init(), hnm_read_header(), idcin_decode_init(), iff_read_header(), init(), jacosub_write_header(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_decode_init(), latm_write_frame_header(), latm_write_header(), libcelt_dec_init(), libopus_decode_init(), libopus_encode_init(), libspeex_decode_init(), libvorbis_encode_init(), libx265_encode_init(), m4sl_cb(), matroska_parse_tracks(), metasound_decode_init(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mkv_write_native_codecprivate(), mov_create_chapter_track(), mov_finalize_stsd_codec(), mov_read_extradata(), mov_read_targa_y216(), mov_read_trak(), mov_rewrite_dvd_sub_extradata(), mov_text_encode_init(), mov_write_extradata_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_subtitle_tag(), mov_write_tmcd_tag(), mp3_header_decompress(), mp_decode_init(), mpc7_decode_init(), mpc8_decode_init(), mpeg4_decode_header(), mpeg_decode_frame(), mpegts_write_header(), mpegts_write_pmt(), msrle_decode_init(), msvideo1_decode_init(), mtv_read_header(), mvc_decode_init(), new_stream(), nut_read_header(), ogg_build_opus_headers(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_decode_init(), ogm_header(), oma_write_header(), open_output_file(), parse_fmtp_config(), parse_media_type(), parse_packed_headers(), parse_video_var(), parse_vtrk(), print_final_stats(), put_audio_specific_config(), put_flac_codecpriv(), put_wv_codecpriv(), put_xiph_codecpriv(), qdm2_decode_init(), raw_init_decoder(), read_extra_header(), read_header(), read_specific_config(), realtext_read_header(), rl2_decode_init(), rl2_read_header(), rm_read_audio_stream_info(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), sdp_parse_fmtp_config_h264(), show_stream(), smacker_read_header(), smvjpeg_decode_init(), speex_header(), Stagefright_close(), Stagefright_decode_frame(), Stagefright_init(), svq3_decode_init(), svq3_parse_packet(), tak_read_header(), theora_header(), transcode_init(), tta_decode_init(), tta_read_header(), twinvq_decode_init(), uninit(), utvideo_decode_init(), utvideo_encode_init(), vc1_decode_init(), vdadec_init(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vqa_decode_init(), wavesynth_parse_extradata(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_extradata(), write_header(), write_streamheader(), write_trailer(), X264_init(), XAVS_init(), xmv_process_packet_header(), xvid_encode_init(), xvid_strip_vol_header(), xwma_read_header(), and yop_decode_init().

AVRational AVCodecContext::time_base

This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.

For fixed-fps content, timebase should be 1/framerate and timestamp increments should be identically 1.

encoding: MUST be set by user.
decoding: Set by libavcodec.

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_video.c, muxing.c, and transcoding.c.

Definition at line 1338 of file avcodec.h.

Referenced by add_av_stream(), add_codec(), add_stream(), audio_decode_frame(), av_guess_frame_rate(), avcodec_encode_audio(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), caca_write_header(), check_recording_time(), close_output_stream(), cmv_process_header(), compute_pkt_fields2(), compute_status(), config(), config_props(), cpia_decode_init(), dc1394_read_common(), decklink_setup_video(), decode_audio(), decode_frame(), decode_packet(), decode_seq_header(), decode_sequence_header_adv(), decode_vol_header(), decode_vop_header(), dirac_header(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dshow_add_device(), dump_stream_format(), dvd_nav_parse(), dvvideo_decode_frame(), encode_ext_header(), encode_init(), encode_write_frame(), estimate_best_b_count(), fbdev_read_header(), ff_af_queue_add(), ff_compute_frame_duration(), ff_flv_encode_picture_header(), ff_h261_encode_picture_header(), ff_h263_decode_picture_header(), ff_h263_encode_picture_header(), ff_h263_show_pict_info(), ff_h264_decode_init(), ff_mpeg4_encode_picture_header(), ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_msmpeg4_encode_ext_header(), ff_raw_video_read_header(), ff_samples_to_time_base(), ff_set_mpeg4_time(), ff_xvid_rate_control_init(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), find_fps(), find_frame_rate_index(), flush_encoders(), gdigrab_read_header(), get_audio_frame(), get_fps(), get_video_format_idx(), get_video_frame(), grab_read_header(), h261_decode_picture_header(), h264_slice_header_init(), init_filter(), init_filters(), init_muxer(), init_pts(), lavfi_read_header(), libschroedinger_encode_init(), libschroedinger_handle_first_access_unit(), libx265_encode_init(), main(), microdvd_decode_frame(), microdvd_write_header(), mov_create_timecode_track(), mov_parse_stsd_data(), mov_text_decode_frame(), mov_write_tmcd_tag(), mpeg4_decode_header(), mpeg4_encode_gop_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), mpegvideo_extract_headers(), mpegvideo_parse(), mpl2_decode_frame(), oggvorbis_decode_init(), open_output_file(), opt_target(), optimum_dist(), optimum_use15_7(), output_packet(), parse_ffconfig(), parse_forced_key_frames(), parse_source_parameters(), parse_timecode_in_framenum_format(), reap_filters(), roq_write_header(), sami_decode_frame(), set_frame_distances(), set_sps(), show_stream(), srt_decode_frame(), tb_unreliable(), text_decode_frame(), tgq_decode_init(), tgv_decode_init(), tqi_decode_init(), transcode_init(), update_context_from_thread(), vaapi_mpeg4_start_frame(), vdpau_mpeg4_start_frame(), vfw_read_header(), video_encode_example(), vpx_init(), webvtt_decode_frame(), write_audio_frame(), write_streaminfo(), write_video_frame(), x11grab_read_header(), X264_init(), XAVS_init(), xvid_correct_framerate(), and xvid_encode_init().

int AVCodecContext::ticks_per_frame

For some codecs, the time base is closer to the field rate than the frame rate.

Most notably, H.264 and MPEG-2 specify time_base as half of frame duration if no telecine is used ...

Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.

Definition at line 1347 of file avcodec.h.

Referenced by av_guess_frame_rate(), avformat_find_stream_info(), compute_pkt_fields2(), decode_sequence_header_adv(), ff_compute_frame_duration(), ff_h264_decode_init(), ff_msmpeg4_encode_ext_header(), get_fps(), libx265_encode_init(), mpeg_decode_postinit(), optimum_dist(), optimum_use15_7(), output_packet(), transcode_init(), update_context_from_thread(), vc1_extract_header(), vp8_encode(), and X264_init().

int AVCodecContext::delay

Codec delay.

Encoding: Number of frames delay there will be from the encoder input to the decoder output. (we assume the decoder matches the spec) Decoding: Number of frames delay in addition to what a standard decoder as specified in the spec would produce.

Video: Number of frames the decoded output will be delayed relative to the encoded input.

Audio: For encoding, this is the number of "priming" samples added by the encoder to the beginning of the stream. The decoded output will be delayed by this many samples relative to the input to the encoder (or more, if the decoder adds its own padding). The timestamps on the output packets are adjusted by the encoder so that they always refer to the first sample of the data actually contained in the packet, including any added padding. E.g. if the timebase is 1/samplerate and the timestamp of the first input sample is 0, the timestamp of the first output packet will be -delay.

For decoding, this is the number of samples the decoder needs to output before the decoder's output is valid. When seeking, you should start decoding this many samples prior to your desired seek point.

encoding: Set by libavcodec.
decoding: Set by libavcodec.

Definition at line 1380 of file avcodec.h.

Referenced by aac_encode_init(), amr_wb_encode_frame(), amr_wb_encode_init(), encode_frame(), encode_init(), encode_superframe(), Faac_encode_init(), ff_ac3_encode_init(), ff_af_queue_init(), ff_MPV_encode_init(), ff_opus_parse_extradata(), g722_encode_init(), libopus_decode_init(), libopus_encode_init(), libopus_write_header(), libvorbis_encode_frame(), matroska_parse_tracks(), mkv_write_track(), mp3_write_xing(), mp3lame_encode_init(), MPA_encode_frame(), MPA_encode_init(), ogg_write_packet_internal(), opus_header(), ra144_encode_init(), transcode_init(), twolame_encode_frame(), twolame_encode_init(), and update_context_from_thread().

int AVCodecContext::width

picture width / height.

encoding: MUST be set by user.
decoding: May be set by the user before opening the decoder if known e.g. from the container. Some decoders will require the dimensions to be set by the caller. During decoding, the decoder may overwrite those values as required.

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_video.c, muxing.c, and transcoding.c.

Definition at line 1392 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), aic_decode_header(), aic_decode_init(), alloc_frame_buffer(), alloc_picture(), amf_parse_object(), apply_param_change(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), aura_decode_init(), avcodec_decode_video2(), avcodec_encode_video2(), avcodec_open2(), avcodec_string(), avf_read_header(), avi_read_header(), avi_write_header(), avisynth_create_stream_video(), avpriv_dv_codec_profile(), avs_read_packet(), avui_decode_frame(), avui_encode_frame(), avui_encode_init(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bitline2chunky(), bitplanar2chunky(), bmp_decode_frame(), bmp_encode_frame(), bmv_read_header(), caca_write_header(), cdg_decode_init(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), cdxl_read_packet(), cin_read_header(), cine_read_header(), cinepak_decode_init(), cinepak_encode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_reinit(), compute_display_area(), compute_overlay_rect(), compute_status(), config(), config_props(), configure_output_video_filter(), CustomSource::CustomSource(), cyuv_decode_init(), dc1394_read_common(), decklink_setup_video(), decode_13(), decode_block(), decode_frame(), decode_frame_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_frame(), decode_packet(), decode_picture_header(), decode_seq_header(), decode_sequence_header_adv(), decode_stream_header(), decode_thread(), decode_write_frame(), dfa_decode_frame(), dfa_decode_init(), dfa_read_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_video_stats(), draw_char(), dshow_add_device(), dump_stream_format(), dv_frame_offset(), dv_init_mux(), dv_write_pack(), dvbsub_parse_display_definition_segment(), dvdsub_init(), dvvideo_encode_init(), dxa_read_header(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxtory_decode_v2_410(), dxtory_decode_v2_420(), dxtory_decode_v2_444(), dxtory_decode_v2_565(), dxtory_decode_v2_rgb(), ea_read_header(), encode_frame(), encode_gbrp10(), encode_gbrp12(), encode_init(), encode_picture_ls(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_frame(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), estimate_best_b_count(), event_thread(), execute_code(), fbdev_read_header(), fbdev_write_packet(), ff_asv_common_init(), ff_ccitt_unpack(), ff_create_schro_frame(), ff_dnxhd_find_cid(), ff_flac_parse_picture(), ff_generate_avci_extradata(), ff_get_bmp_header(), ff_h264_update_thread_context(), ff_huffyuv_common_init(), ff_img_read_header(), ff_img_read_packet(), ff_mjpeg_encode_picture_header(), ff_mpeg_update_thread_context(), ff_MPV_encode_init(), ff_MPV_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_put_bmp_header(), ff_rm_read_mdpr_codecdata(), ff_rtp_send_jpeg(), ff_rv34_decode_init(), ff_sauce_read(), ff_set_dimensions(), ff_set_sar(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_frame_start(), ff_snow_get_buffer(), ff_thread_video_encode_frame(), ff_vda_default_init(), ff_vp56_decode_frame(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffv1_common_init(), ffv1_init_slice_contexts(), fic_decode_frame(), fic_decode_init(), fic_draw_cursor(), fill_picture_parameters(), film_read_header(), find_compressor(), find_slice_quant(), find_stream_in_feed(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flv_write_packet(), frm_read_header(), frm_read_packet(), g2m_decode_frame(), get_buffer_internal(), get_buffer_with_edge(), get_siz(), get_video_format_idx(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), gif_read_header(), gif_write_header(), grab_read_header(), halfpel_interpol(), handle_file(), has_codec_parameters(), hnm_decode_init(), hnm_read_header(), hscroll(), ico_check_attributes(), ico_write_packet(), idcin_decode_vlcs(), idcin_read_header(), idct_put(), iff_read_header(), init(), init_bundles(), init_dimensions(), init_filter(), init_filters(), init_image(), init_muxer(), init_stream(), ipmovie_read_header(), ipvideo_decode_frame(), ipvideo_decode_opcodes(), ir2_decode_frame(), ivf_write_header(), j2kenc_init(), jpeg_table_header(), lag_decode_arith_plane(), lag_decode_frame(), lavfi_read_header(), libopenjpeg_copy_packed12(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), libwebp_encode_frame(), libx265_encode_init(), ljpeg_encode_frame(), ljpeg_encode_init(), ljpeg_encode_yuv(), lvf_read_header(), main(), matroska_parse_tracks(), mca(), mimic_decode_frame(), mj2_create_image(), mm_decode_inter(), mm_decode_intra(), modplug_read_header(), motion_compensation(), mov_create_dvd_sub_decoder_specific_info(), mov_get_dv_codec_tag(), mov_get_mpeg2_xdcam_codec_tag(), mov_parse_stsd_subtitle(), mov_parse_stsd_video(), mov_read_ares(), mov_read_header(), mov_read_targa_y216(), mov_read_trak(), mov_rewrite_dvd_sub_extradata(), mov_write_avid_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), mov_write_video_tag(), movie_config_output_props(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_decode_line(), mp_read_changes_map(), mpeg4_decode_header(), mpegvideo_extract_headers(), msrle_decode_frame(), msrle_decode_pal4(), mss1_decode_frame(), mss2_decode_frame(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_frame(), mss4_decode_init(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mvc_decode_frame(), mvc_decode_init(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_output_file(), open_video(), opengl_compute_display_area(), opengl_write_header(), paf_video_init(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_object_segment(), parse_presentation_segment(), parse_video_var(), parse_vtrk(), pcx_encode_frame(), pmp_header(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), put_videoinfoheader2(), qtkit_read_header(), qtrle_encode_frame(), qtrle_encode_init(), r3d_read_red1(), raw_encode(), raw_init_decoder(), rawvideo_read_header(), rawvideo_read_packet(), read_argb_line(), read_frame(), read_header(), read_packet(), read_rgb24_component_line(), read_seek(), read_thread(), read_yuv_component_line(), receive_frame(), reget_buffer_internal(), rl2_decode_init(), rl2_read_header(), rl2_rle_decode(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_packet(), rpl_read_header(), rpza_decode_stream(), rv10_write_header(), scan_file(), sdl_write_packet(), sdr2_read_header(), seq_read_header(), set_sps(), sgirle_decode_frame(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), smjpeg_write_header(), smush_read_header(), smvjpeg_decode_frame(), sp5x_decode_frame(), Stagefright_init(), str_read_packet(), sub2video_prepare(), sunrast_encode_init(), sunrast_image_write_header(), sunrast_image_write_image(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_init(), swf_read_packet(), swf_write_header(), swf_write_video(), targa_encode_frame(), teletext_init_decoder(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), theora_header(), thp_read_header(), tm2_decode_blocks(), tm2_motion_block(), tmv_decode_frame(), tmv_read_header(), to_meta_with_crop(), tqi_decode_frame(), transcode_init(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), truemotion1_decode_init(), tscc2_decode_init(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), update_size(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_frame(), v308_decode_init(), v308_encode_frame(), v308_encode_init(), v408_decode_frame(), v408_encode_frame(), v410_decode_frame(), v410_decode_init(), v410_encode_frame(), v410_encode_init(), v4l2_read_header(), vb_decode_framedata(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vcr1_decode_frame(), vcr1_decode_init(), vda_h264_alloc_frame(), vdadec_init(), vfw_read_header(), video_encode_example(), vivo_read_header(), vmd_decode(), vp3_decode_init(), vp7_decode_frame_header(), vp8_decode(), vp8_decode_frame_header(), vp8_header(), vpx_init(), wc3_read_header(), write_adaptation_set(), write_header(), write_manifest(), write_packet(), write_streamheader(), write_trailer(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_chroma(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), xan_wc3_output_pixel_run(), XAVS_init(), xbm_decode_frame(), xbm_encode_frame(), xface_decode_init(), xface_encode_frame(), xiph_parse_fmtp_pair(), xmv_read_header(), xv_write_header(), xv_write_packet(), xvid_encode_frame(), xvid_encode_init(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_frame(), y41p_decode_frame(), y41p_decode_init(), y41p_encode_frame(), y41p_encode_init(), yop_decode_frame(), yop_decode_init(), yop_read_header(), yuv4_decode_frame(), yuv4_encode_frame(), yuv4_generate_header(), yuv4_read_header(), yuv4_read_packet(), yuv4_write_packet(), zero12v_decode_frame(), zerocodec_decode_frame(), and zmbv_me().

int AVCodecContext::height

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_video.c, muxing.c, and transcoding.c.

Definition at line 1392 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), aic_decode_header(), aic_decode_init(), alloc_frame_buffer(), alloc_picture(), amf_parse_object(), amv_encode_picture(), apply_param_change(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), avcodec_decode_video2(), avcodec_encode_video2(), avcodec_open2(), avcodec_string(), avf_read_header(), avi_read_header(), avi_write_header(), avisynth_create_stream_video(), avpriv_dv_codec_profile(), avs_read_packet(), avui_decode_frame(), avui_encode_frame(), avui_encode_init(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bitline2chunky(), bitplanar2chunky(), bmp_decode_frame(), bmp_encode_frame(), bmv_read_header(), caca_write_header(), cdg_decode_frame(), cdg_decode_init(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), cdxl_read_packet(), cin_read_header(), cine_read_header(), cinepak_decode_init(), cinepak_decode_vectors(), cinepak_encode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_reinit(), comp_block(), compute_display_area(), compute_overlay_rect(), compute_status(), config(), config_props(), configure_output_video_filter(), CustomSource::CustomSource(), cyuv_decode_init(), dc1394_read_common(), decklink_setup_video(), decode_13(), decode_argb_frame(), decode_frame(), decode_frame_header(), decode_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_block(), decode_p_frame(), decode_packet(), decode_picture_header(), decode_rgb24_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_stream_header(), decode_thread(), decode_write_frame(), decode_yuv_frame(), dfa_decode_frame(), dfa_decode_init(), dfa_read_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_get_blocks(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_video_stats(), draw_char(), dshow_add_device(), dump_stream_format(), dv_frame_offset(), dv_init_mux(), dv_write_pack(), dvbsub_parse_display_definition_segment(), dvdsub_init(), dvvideo_encode_init(), dxa_read_header(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxtory_decode_v2_410(), dxtory_decode_v2_420(), dxtory_decode_v2_444(), dxtory_decode_v2_565(), dxtory_decode_v2_rgb(), dxva2_h264_end_frame(), dxva2_mpeg2_end_frame(), dxva2_vc1_end_frame(), ea_read_header(), encode_frame(), encode_gbrp10(), encode_gbrp12(), encode_init(), encode_picture_ls(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), estimate_best_b_count(), event_thread(), execute_code(), fbdev_read_header(), fbdev_write_packet(), ff_asv_common_init(), ff_create_schro_frame(), ff_dnxhd_find_cid(), ff_draw_horiz_band(), ff_er_frame_end(), ff_flac_parse_picture(), ff_get_bmp_header(), ff_h264_draw_horiz_band(), ff_h264_update_thread_context(), ff_huffyuv_common_init(), ff_img_read_header(), ff_img_read_packet(), ff_mjpeg_decode_sof(), ff_mjpeg_encode_picture_header(), ff_mpeg_update_thread_context(), ff_MPV_encode_init(), ff_MPV_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_put_bmp_header(), ff_rm_read_mdpr_codecdata(), ff_rtp_send_jpeg(), ff_rv34_decode_init(), ff_sauce_read(), ff_set_dimensions(), ff_set_sar(), ff_slice_thread_init(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_frame_start(), ff_snow_get_buffer(), ff_thread_video_encode_frame(), ff_vaapi_mpeg_end_frame(), ff_vda_default_init(), ff_vp56_decode_frame(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), ffv1_common_init(), ffv1_init_slice_contexts(), fic_decode_frame(), fic_decode_init(), fic_draw_cursor(), fill_picture_parameters(), film_read_header(), find_compressor(), find_slice_quant(), find_stream_in_feed(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flip(), flv_write_packet(), frm_read_header(), frm_read_packet(), g2m_decode_frame(), get_buffer_internal(), get_buffer_with_edge(), get_siz(), get_video_format_idx(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), gif_read_header(), gif_write_header(), grab_read_header(), gxf_find_lines_index(), gxf_write_header(), gxf_write_mpeg_auxiliary(), halfpel_interpol(), handle_file(), hnm_decode_init(), hnm_read_header(), hscroll(), ico_check_attributes(), ico_write_packet(), idcin_decode_vlcs(), idcin_read_header(), iff_read_header(), import_format(), init(), init_bundles(), init_dimensions(), init_filter(), init_filters(), init_image(), init_muxer(), init_stream(), ipmovie_read_header(), ipvideo_decode_frame(), ipvideo_decode_opcodes(), ir2_decode_frame(), ivf_write_header(), j2kenc_init(), lag_decode_frame(), lavfi_read_header(), libopenjpeg_copy_packed12(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), libwebp_encode_frame(), libx265_encode_init(), ljpeg_encode_frame(), ljpeg_encode_yuv(), lvf_read_header(), main(), matroska_parse_tracks(), mca(), mimic_decode_frame(), mj2_create_image(), mm_decode_inter(), mm_decode_intra(), modplug_read_header(), motion_compensation(), mov_create_dvd_sub_decoder_specific_info(), mov_get_dv_codec_tag(), mov_get_mpeg2_xdcam_codec_tag(), mov_parse_stsd_subtitle(), mov_parse_stsd_video(), mov_read_header(), mov_read_targa_y216(), mov_read_trak(), mov_rewrite_dvd_sub_extradata(), mov_write_avid_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), movie_config_output_props(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_read_changes_map(), mpeg4_decode_header(), mpegvideo_extract_headers(), msrle_decode_8_16_24_32(), msrle_decode_frame(), msrle_decode_pal4(), mss1_decode_frame(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_frame(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mvc_decode_frame(), mvc_decode_init(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_output_file(), open_video(), opengl_compute_display_area(), opengl_write_header(), paf_video_init(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_object_segment(), parse_presentation_segment(), parse_video_var(), parse_vtrk(), pcx_encode_frame(), pmp_header(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), prepare_avpic(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), put_videoinfoheader2(), qtkit_read_header(), qtrle_decode_16bpp(), qtrle_decode_1bpp(), qtrle_decode_24bpp(), qtrle_decode_2n4bpp(), qtrle_decode_32bpp(), qtrle_decode_8bpp(), qtrle_decode_frame(), qtrle_encode_frame(), qtrle_encode_init(), r3d_read_red1(), raw_encode(), raw_init_decoder(), rawvideo_read_header(), rawvideo_read_packet(), read_frame(), read_header(), read_packet(), read_seek(), read_thread(), receive_frame(), reget_buffer_internal(), rl2_decode_init(), rl2_read_header(), rl2_rle_decode(), roq_decode_frame(), roq_decode_init(), roq_encode_init(), roq_read_packet(), rpl_read_header(), rpza_decode_stream(), rv10_write_header(), scan_file(), sdl_write_packet(), sdr2_read_header(), seq_read_header(), set_sps(), sgirle_decode_frame(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), smjpeg_write_header(), smush_read_header(), smvjpeg_decode_frame(), sp5x_decode_frame(), Stagefright_init(), str_read_packet(), sub2video_prepare(), sunrast_encode_init(), sunrast_image_write_header(), sunrast_image_write_image(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_frame(), svq3_decode_init(), swf_write_header(), swf_write_video(), targa_encode_frame(), teletext_init_decoder(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), theora_header(), thp_read_header(), tm2_decode_blocks(), tm2_motion_block(), tmv_decode_frame(), tmv_read_header(), to_meta_with_crop(), tqi_decode_frame(), transcode_init(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), tscc2_decode_init(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), update_size(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_frame(), v308_encode_frame(), v408_decode_frame(), v408_encode_frame(), v410_decode_frame(), v410_encode_frame(), v4l2_read_header(), vaapi_h264_end_frame(), vb_decode_framedata(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vcr1_decode_frame(), vcr1_decode_init(), vda_h264_alloc_frame(), vdadec_init(), vdpau_h264_end_frame(), vfw_read_header(), video_encode_example(), vivo_read_header(), vmd_decode(), vp3_decode_init(), vp3_draw_horiz_band(), vp7_decode_frame_header(), vp8_decode(), vp8_decode_frame_header(), vp8_header(), vpx_init(), wc3_read_header(), write_adaptation_set(), write_header(), write_manifest(), write_packet(), write_streamheader(), write_trailer(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xan_decode_chroma(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), XAVS_init(), xbm_decode_frame(), xbm_encode_frame(), xface_decode_init(), xface_encode_frame(), xiph_parse_fmtp_pair(), xmv_read_header(), xv_write_header(), xv_write_packet(), xvid_encode_frame(), xvid_encode_init(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_frame(), y41p_decode_frame(), y41p_encode_frame(), yop_decode_frame(), yop_decode_init(), yop_read_header(), yuv4_decode_frame(), yuv4_encode_frame(), yuv4_generate_header(), yuv4_read_header(), yuv4_read_packet(), yuv4_write_packet(), zero12v_decode_frame(), zerocodec_decode_frame(), and zmbv_me().

int AVCodecContext::coded_width

Bitstream width / height, may be different from width/height e.g.

when the decoded frame is cropped before being output or lowres is enabled.

encoding: unused
decoding: May be set by the user before opening the decoder if known e.g. from the container. During decoding, the decoder may overwrite those values as required.

Definition at line 1402 of file avcodec.h.

Referenced by avcodec_decode_video2(), avcodec_open2(), avpriv_dv_codec_profile(), avpriv_dv_frame_profile2(), decode_init(), dxva2_create_decoder(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_decode_slice_header(), ff_h264_update_thread_context(), ff_mpeg_update_thread_context(), ff_mss12_decode_init(), ff_set_dimensions(), ff_vp56_decode_frame(), get_buffer_internal(), h261_decode_frame(), h261_decode_init(), init_dimensions(), mpeg4_decode_header(), mpeg_decode_postinit(), mpegvideo_extract_headers(), rv10_decode_init(), set_sps(), sp5x_decode_frame(), update_context_from_thread(), update_dimensions(), vaapi_vc1_start_frame(), vc1_decode_frame(), vc1_decode_init(), vc1_interp_mc(), vc1_mc_1mv(), vc1_mc_4mv_chroma(), vc1_mc_4mv_chroma4(), vc1_mc_4mv_luma(), vcr2_init_sequence(), vdpau_init(), verify_md5(), and vp56_size_changed().

int AVCodecContext::coded_height

Definition at line 1402 of file avcodec.h.

Referenced by avcodec_decode_video2(), avcodec_open2(), avpriv_dv_codec_profile(), avpriv_dv_frame_profile2(), decode_init(), dxva2_create_decoder(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_decode_slice_header(), ff_h264_update_thread_context(), ff_mjpeg_decode_init(), ff_mpeg_update_thread_context(), ff_mss12_decode_init(), ff_set_dimensions(), ff_vp56_decode_frame(), get_buffer_internal(), h261_decode_frame(), h261_decode_init(), init_dimensions(), mpeg4_decode_header(), mpeg_decode_postinit(), mpegvideo_extract_headers(), rv10_decode_init(), set_sps(), sp5x_decode_frame(), update_context_from_thread(), update_dimensions(), vaapi_vc1_start_frame(), vc1_decode_frame(), vc1_decode_init(), vc1_interp_mc(), vc1_mc_1mv(), vc1_mc_4mv_chroma(), vc1_mc_4mv_chroma4(), vc1_mc_4mv_luma(), vcr2_init_sequence(), vdpau_init(), verify_md5(), and vp56_size_changed().

int AVCodecContext::gop_size

the number of pictures in a group of pictures, or 0 for intra_only

encoding: Set by user.
decoding: unused

Examples:: decoding_encoding.c, and muxing.c.

Definition at line 1413 of file avcodec.h.

Referenced by add_av_stream(), add_stream(), config(), config_props(), encode_frame(), encode_init(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flashsv2_encode_frame(), flashsv_encode_frame(), libschroedinger_encode_init(), mxf_get_mpeg2_codec_ul(), new_video_stream(), parse_ffconfig(), qtrle_encode_frame(), recommend_keyframe(), roq_encode_frame(), svq1_encode_frame(), video_encode_example(), vpx_init(), write_extradata(), X264_init(), XAVS_init(), and xvid_encode_init().

enum AVPixelFormat AVCodecContext::pix_fmt

Pixel format, see AV_PIX_FMT_xxx.

May be set by the demuxer if known from headers. May be overridden by the decoder if it knows better.

encoding: Set by user.
decoding: Set by user if known, overridden by libavcodec if known

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_video.c, muxing.c, and transcoding.c.

Definition at line 1422 of file avcodec.h.

Referenced by aasc_decode_frame(), aasc_decode_init(), add_input_streams(), add_stream(), aic_decode_init(), alloc_frame_buffer(), amv_encode_picture(), aura_decode_init(), avcodec_align_dimensions(), avcodec_align_dimensions2(), avcodec_decode_video2(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avf_read_header(), avformat_find_stream_info(), avi_write_header(), avisynth_create_stream_video(), avpriv_dv_codec_profile(), avs_decode_init(), avui_decode_init(), bethsoftvid_decode_init(), bfi_decode_init(), bfi_read_header(), bmp_decode_frame(), bmp_encode_frame(), bmp_encode_init(), bmv_read_header(), caca_write_header(), cdg_decode_init(), cdxl_decode_frame(), choose_pix_fmts(), cine_read_header(), cinepak_decode_init(), cinepak_encode_end(), cinepak_encode_init(), cinvideo_decode_init(), cllc_decode_frame(), cmv_decode_init(), config(), config_props(), copy_frame(), cpia_decode_init(), cyuv_decode_frame(), dc1394_read_common(), decklink_setup_video(), decode_frame(), decode_frame_header(), decode_header(), decode_init(), decode_packet(), decode_plane(), decode_slice(), decode_slice_thread(), decode_thread(), decode_wmv9(), dfa_decode_init(), dirac_decode_data_unit(), dnxhd_decode_header(), dnxhd_encode_init(), dshow_add_device(), dv_frame_offset(), dv_init_mux(), dvvideo_decode_frame(), dvvideo_encode_frame(), dvvideo_encode_init(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxtory_decode_v2_410(), dxtory_decode_v2_420(), dxtory_decode_v2_444(), dxtory_decode_v2_565(), dxtory_decode_v2_rgb(), encode_frame(), encode_init(), encode_init_ls(), encode_picture_ls(), encode_slice(), escape124_decode_init(), escape130_decode_init(), estimate_best_b_count(), event_thread(), extract_header(), fbdev_read_header(), fbdev_write_packet(), ff_cavs_init(), ff_create_schro_frame(), ff_draw_horiz_band(), ff_h263_decode_init(), ff_h264_decode_slice_header(), ff_h264_draw_horiz_band(), ff_img_read_header(), ff_init_buffer_info(), ff_jpegls_decode_lse(), ff_llviddsp_init_x86(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sof(), ff_mjpeg_decode_sos(), ff_mjpeg_encode_picture_header(), ff_mjpeg_init_hvsample(), ff_MPV_common_init(), ff_MPV_encode_init(), ff_MPV_frame_start(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_rtp_send_jpeg(), ff_rv34_decode_init(), ff_snow_common_init_after_header(), ff_thread_video_encode_frame(), ff_vp56_decode_frame(), ff_vp56_init_context(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), fic_decode_init(), film_read_header(), find_compressor(), flashsv_decode_init(), flic_decode_frame(), flic_decode_init(), frame_end(), frm_read_header(), frm_read_packet(), g2m_decode_init(), get_buffer_internal(), get_buffer_with_edge(), get_pixel_format(), get_siz(), gif_decode_init(), gif_encode_frame(), gif_encode_init(), gif_write_header(), grab_read_header(), gxf_write_dv_auxiliary(), gxf_write_header(), gxf_write_mpeg_auxiliary(), gxf_write_umf_media_dv(), gxf_write_umf_media_mpeg(), h261_decode_init(), h264_slice_header_init(), has_codec_parameters(), hnm_decode_init(), ico_check_attributes(), ico_write_trailer(), idcin_decode_init(), iff_read_header(), init(), init_decoder(), init_filter(), init_filters(), init_image(), ipvideo_decode_init(), ir2_decode_init(), j2kenc_init(), jpeg2000_decode_frame(), jpeg2000_decode_tile(), jpeg_put_comments(), lag_decode_arith_plane(), lag_decode_frame(), lag_pred_line(), lavfi_read_header(), libopenjpeg_decode_frame(), libopenjpeg_encode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), libwebp_encode_frame(), libx265_encode_frame(), libx265_encode_init(), ljpeg_encode_bgr(), ljpeg_encode_frame(), ljpeg_encode_init(), load_input_picture(), main(), mimic_decode_frame(), mj2_create_image(), mm_decode_init(), mov_get_dv_codec_tag(), mov_get_mpeg2_xdcam_codec_tag(), mov_get_rawvideo_codec_tag(), movie_query_formats(), mp_decode_init(), msrle_decode_frame(), msrle_decode_init(), mss1_decode_init(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_init(), mss4_decode_init(), msvideo1_decode_8bit(), msvideo1_decode_init(), mtv_read_header(), mvc_decode_init(), mxf_parse_structural_metadata(), new_video_stream(), open_output_file(), open_video(), opengl_draw(), opengl_write_header(), paf_video_init(), pam_encode_frame(), parse_ffconfig(), parse_source_parameters(), parse_video_var(), pcx_decode_frame(), pcx_encode_frame(), pix_decode_frame(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), prores_encode_init(), ptx_decode_frame(), put_cod(), qtkit_read_header(), qtrle_decode_init(), qtrle_encode_frame(), qtrle_encode_init(), qtrle_encode_line(), raw_encode(), raw_encode_init(), raw_init_decoder(), rawvideo_read_header(), rawvideo_read_packet(), read_ffserver_streams(), read_header(), reget_buffer_internal(), rl2_decode_init(), roq_decode_frame(), roq_decode_init(), rpza_decode_init(), rv10_decode_init(), scan_file(), sdl_write_header(), sdl_write_packet(), seqvideo_decode_init(), set_chroma_format(), set_sps(), setup_hwaccel_for_pixfmt(), sgirle_decode_init(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_init(), smvjpeg_decode_frame(), Stagefright_init(), sub2video_prepare(), sunrast_decode_frame(), sunrast_encode_init(), svq1_decode_init(), svq1_encode_frame(), svq3_decode_init(), targa_encode_frame(), tgq_decode_init(), tgv_decode_init(), tiff_unpack_fax(), tiff_unpack_strip(), tmv_decode_init(), tmv_read_header(), tqi_decode_init(), transcode_init(), truemotion1_decode_header(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_frame_pool(), uses_vdpau(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_init(), v408_decode_init(), v410_decode_init(), v4l2_read_header(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vcr1_decode_init(), vcr2_init_sequence(), vda_h264_alloc_frame(), vdadec_decode(), vdadec_init(), vfw_read_header(), video_encode_example(), video_get_buffer(), vmdvideo_decode_init(), vp3_decode_init(), vp78_decode_init(), vp8_decode(), vp8_lossless_decode_frame(), vp8_lossy_decode_frame(), vp9_decode_init(), vpx_init(), vqa_decode_init(), write_header(), write_packet(), x11grab_read_header(), X264_frame(), X264_init(), xan_decode_init(), xbm_decode_frame(), xface_decode_init(), xiph_parse_fmtp_pair(), xv_write_header(), xv_write_packet(), xvid_encode_frame(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_init(), y41p_decode_init(), yop_decode_init(), yuv4_decode_init(), yuv4_generate_header(), yuv4_read_header(), yuv4_read_packet(), yuv4_write_header(), yuv4_write_packet(), zero12v_decode_init(), and zerocodec_decode_init().

int AVCodecContext::me_method

Motion estimation algorithm used for video coding.

1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]

encoding: MUST be set by user.
decoding: unused

Definition at line 1431 of file avcodec.h.

Referenced by add_codec(), config_props(), encode_blocks(), encode_frame(), encode_init(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), svq1_encode_plane(), X264_init(), XAVS_init(), and xvid_encode_init().

void(* AVCodecContext::draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)

If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.

It improves cache usage. Not all codecs can do that. You must check the codec capabilities beforehand. When multithreading is used, it may be called from multiple threads at the same time; threads might draw different parts of the same AVFrame, or multiple AVFrames, and there is no guarantee that slices will be drawn in order. The function is also used by hardware acceleration APIs. It is called at least once during frame decoding to pass the data needed for hardware render. In that mode instead of pixel data, AVFrame points to a structure specific to the acceleration API. The application reads the structure and can change some fields to indicate progress or mark state.

encoding: unused
decoding: Set by user.
Parameters

height the height of the slice

y the y position of the slice

type 1->top field, 2->bottom field, 3->frame

offset offset into the AVFrame.data from which the slice should be read

Definition at line 1456 of file avcodec.h.

Referenced by draw_slice(), ff_draw_horiz_band(), ff_h264_draw_horiz_band(), ff_init_block_index(), MPV_decode_mb_internal(), update_context_from_user(), and vp3_draw_horiz_band().

enum AVPixelFormat(* AVCodecContext::get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)

callback to negotiate the pixelFormat

Parameters

fmt	is the list of formats which are supported by the codec, it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. The first is always the native one.

Returns

the chosen format

encoding: unused
decoding: Set by user, if not set the native format will be chosen.

Definition at line 1469 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), ff_get_format(), ff_thread_get_format(), init_input_stream(), restore_context(), set_context(), submit_packet(), and vdadec_init().

int AVCodecContext::max_b_frames

maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input.

encoding: Set by user.
decoding: unused

Examples:: decoding_encoding.c, and muxing.c.

Definition at line 1477 of file avcodec.h.

Referenced by add_stream(), compute_pkt_fields2(), config(), config_props(), decode_sequence_header_adv(), estimate_best_b_count(), ff_MPV_encode_init(), ff_vc1_decode_sequence_header(), ff_vc1_parse_frame_header(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), vaapi_vc1_start_frame(), vc1_decode_init(), video_encode_example(), wmv9_init(), X264_init(), XAVS_frame(), XAVS_init(), and xvid_encode_init().

float AVCodecContext::b_quant_factor

qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

encoding: Set by user.
decoding: unused

Definition at line 1486 of file avcodec.h.

Referenced by add_codec(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::rc_strategy

obsolete FIXME remove

Definition at line 1489 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_rate_control_uninit(), and ff_rate_estimate_qscale().

int AVCodecContext::b_frame_strategy

Definition at line 1492 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), select_input_picture(), X264_init(), and XAVS_init().

float AVCodecContext::b_quant_offset

qscale offset between IP and B-frames

encoding: Set by user.
decoding: unused

Definition at line 1499 of file avcodec.h.

Referenced by add_codec(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), and xvid_encode_init().

int AVCodecContext::has_b_frames

Size of the frame reordering buffer in the decoder.

For MPEG-2 it is 1 IPB or 0 low delay IP.

encoding: Set by libavcodec.
decoding: Set by libavcodec.

Definition at line 1507 of file avcodec.h.

Referenced by avcodec_decode_video2(), compute_pkt_fields(), compute_pkt_fields2(), decode(), decode_postinit(), decode_stream_header(), decode_video(), dirac_combine_frame(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_h264_execute_ref_pic_marking(), ff_h264_set_parameter_from_sps(), ff_mpeg4_decode_picture_header(), ff_MPV_encode_init(), ff_rv34_decode_init(), flush(), h264_parse(), has_decode_delay_been_guessed(), libschroedinger_decode_frame(), libschroedinger_encode_init(), mov_build_index(), mpeg_decode_postinit(), mpegvideo_extract_headers(), mxf_get_mpeg2_codec_ul(), nut_read_header(), output_packet(), receive_frame(), rv10_decode_init(), select_from_pts_buffer(), set_sps(), show_stream(), svq3_decode_init(), transcode_init(), update_context_from_thread(), update_initial_durations(), update_initial_timestamps(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), write_streamheader(), X264_init(), XAVS_frame(), and XAVS_init().

int AVCodecContext::mpeg_quant

0-> h263 quant 1-> mpeg quant

encoding: Set by user.
decoding: unused

Definition at line 1514 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), and xvid_encode_init().

float AVCodecContext::i_quant_factor

qscale factor between P and I-frames If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

encoding: Set by user.
decoding: unused

Definition at line 1523 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), X264_init(), and XAVS_init().

float AVCodecContext::i_quant_offset

qscale offset between P and I-frames

encoding: Set by user.
decoding: unused

Definition at line 1530 of file avcodec.h.

Referenced by ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), and get_qscale().

float AVCodecContext::lumi_masking

luminance masking (0-> disabled)

encoding: Set by user.
decoding: unused

Definition at line 1537 of file avcodec.h.

Referenced by adaptive_quantization(), ff_MPV_encode_init(), parse_ffconfig(), and xvid_encode_init().

float AVCodecContext::temporal_cplx_masking

temporary complexity masking (0-> disabled)

encoding: Set by user.
decoding: unused

Definition at line 1544 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

float AVCodecContext::spatial_cplx_masking

spatial complexity masking (0-> disabled)

encoding: Set by user.
decoding: unused

Definition at line 1551 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

float AVCodecContext::p_masking

p block masking (0-> disabled)

encoding: Set by user.
decoding: unused

Definition at line 1558 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

float AVCodecContext::dark_masking

darkness masking (0-> disabled)

encoding: Set by user.
decoding: unused

Definition at line 1565 of file avcodec.h.

Referenced by adaptive_quantization(), ff_MPV_encode_init(), and parse_ffconfig().

int AVCodecContext::slice_count

slice count

encoding: Set by libavcodec.
decoding: Set by user (or 0).

Definition at line 1572 of file avcodec.h.

Referenced by ff_rv34_decode_frame(), get_slice_offset(), rv10_decode_frame(), and update_context_from_user().

int AVCodecContext::prediction_method

prediction method (needed for huffyuv)

encoding: Set by user.
decoding: unused

Definition at line 1578 of file avcodec.h.

Referenced by encode_init(), encode_picture_ls(), ff_mjpeg_encode_picture_header(), j2kenc_init(), ljpeg_encode_bgr(), ljpeg_encode_yuv(), png_enc_init(), and utvideo_encode_init().

int* AVCodecContext::slice_offset

slice offsets in the frame in bytes

encoding: Set/allocated by libavcodec.
decoding: Set/allocated by user (or NULL).

Definition at line 1588 of file avcodec.h.

Referenced by avcodec_copy_context(), ff_frame_thread_free(), get_slice_offset(), and update_context_from_user().

AVRational AVCodecContext::sample_aspect_ratio

sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.

Numerator and denominator must be relatively prime and smaller than 256 for some video standards.

encoding: Set by user.
decoding: Set by libavcodec.

Examples:: filtering_video.c, and transcoding.c.

Definition at line 1597 of file avcodec.h.

Referenced by add_av_stream1(), asf_write_header1(), av_guess_sample_aspect_ratio(), avcodec_decode_video2(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avpriv_dirac_parse_sequence_header(), configure_input_video_filter(), decode_frame(), decode_sequence_header_adv(), decode_vol_header(), dump_stream_format(), dv_write_pack(), encode_frame(), encode_init(), ff_flv_decode_picture_header(), ff_h263_decode_frame(), ff_h263_decode_picture_header(), ff_h263_encode_picture_header(), ff_h264_decode_slice_header(), ff_init_buffer_info(), ff_intel_h263_decode_picture_header(), ff_MPV_encode_init(), ff_rv34_decode_frame(), ff_set_sar(), gif_image_write_header(), gif_read_header1(), has_codec_parameters(), init_filter(), init_filters(), init_muxer(), jpeg_put_comments(), lavfi_read_header(), libx265_encode_init(), mjpeg_decode_app(), mov_write_pasp_tag(), mov_write_tapt_tag(), mov_write_video_tag(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), new_video_stream(), open_output_file(), parse_source_parameters(), pcx_decode_frame(), pcx_encode_frame(), reap_filters(), receive_frame(), rv20_decode_picture_header(), set_sar(), transcode_init(), truemotion1_decode_header(), update_context_from_thread(), X264_frame(), X264_init(), XAVS_init(), xv_write_header(), and xvid_encode_frame().

int AVCodecContext::me_cmp

motion estimation comparison function

encoding: Set by user.
decoding: unused

Definition at line 1604 of file avcodec.h.

Referenced by config_props(), encode_init(), encode_q_branch(), estimate_best_b_count(), estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_4block_rd(), get_block_rd(), hpel_motion_search(), qpel_motion_search(), X264_init(), and XAVS_init().

int AVCodecContext::me_sub_cmp

subpixel motion estimation comparison function

encoding: Set by user.
decoding: unused

Definition at line 1610 of file avcodec.h.

Referenced by config_props(), direct_search(), encode_init(), encode_q_branch(), estimate_best_b_count(), estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), hpel_motion_search(), and qpel_motion_search().

int AVCodecContext::mb_cmp

macroblock comparison function (not supported yet)

encoding: Set by user.
decoding: unused

Definition at line 1616 of file avcodec.h.

Referenced by check_bidir_mv(), config_props(), direct_search(), encode_q_branch(), estimate_best_b_count(), estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), h263_mv4_search(), interlaced_search(), and sse_mb().

int AVCodecContext::ildct_cmp

interlaced DCT comparison function

encoding: Set by user.
decoding: unused

Definition at line 1622 of file avcodec.h.

Referenced by dvvideo_encode_init(), encode_mb_internal(), and ff_MPV_encode_init().

int AVCodecContext::dia_size

ME diamond size & shape.

encoding: Set by user.
decoding: unused

Definition at line 1645 of file avcodec.h.

Referenced by config_props(), estimate_motion_thread(), ff_init_me(), iterative_me(), and svq1_encode_plane().

int AVCodecContext::last_predictor_count

amount of previous MV predictors (2a+1 x 2a+1 square)

encoding: Set by user.
decoding: unused

Definition at line 1652 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::pre_me

prepass for motion estimation

encoding: Set by user.
decoding: unused

Definition at line 1659 of file avcodec.h.

Referenced by encode_picture().

int AVCodecContext::me_pre_cmp

motion estimation prepass comparison function

encoding: Set by user.
decoding: unused

Definition at line 1666 of file avcodec.h.

Referenced by ff_init_me(), and ff_pre_estimate_p_frame_motion().

int AVCodecContext::pre_dia_size

ME prepass diamond size & shape.

encoding: Set by user.
decoding: unused

Definition at line 1673 of file avcodec.h.

Referenced by ff_init_me(), and pre_estimate_motion_thread().

int AVCodecContext::me_subpel_quality

subpel ME quality

encoding: Set by user.
decoding: unused

Definition at line 1680 of file avcodec.h.

Referenced by ffm2_read_header(), ffm_read_header(), ffm_write_header(), qpel_motion_search(), X264_init(), and XAVS_init().

int AVCodecContext::dtg_active_format

DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport streams) 0 if not set.

encoding: unused
decoding: Set by decoder.

Definition at line 1690 of file avcodec.h.

Referenced by decode_user_data_itu_t_t35(), mpeg_decode_user_data(), and update_context_from_thread().

int AVCodecContext::me_range

maximum motion estimation search range in subpel units If 0 then no limit.

encoding: Set by user.
decoding: unused

Definition at line 1706 of file avcodec.h.

Referenced by encode_init(), ff_fix_long_mvs(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_limits(), mpeg1_encode_sequence_header(), X264_init(), and XAVS_init().

int AVCodecContext::intra_quant_bias

intra quantizer bias

encoding: Set by user.
decoding: unused

Definition at line 1713 of file avcodec.h.

Referenced by dnxhd_encode_init(), and ff_MPV_encode_init().

int AVCodecContext::inter_quant_bias

inter quantizer bias

encoding: Set by user.
decoding: unused

Definition at line 1721 of file avcodec.h.

Referenced by ff_MPV_encode_init().

int AVCodecContext::slice_flags

slice flags

encoding: unused
decoding: Set by user.

Definition at line 1728 of file avcodec.h.

Referenced by ff_draw_horiz_band(), ff_h264_draw_horiz_band(), mpeg_field_start(), and update_context_from_user().

int AVCodecContext::mb_decision

macroblock decision mode

encoding: Set by user.
decoding: unused

Examples:: muxing.c.

Definition at line 1748 of file avcodec.h.

Referenced by add_stream(), clip_coeffs(), dnxhd_calc_bits_thread(), dnxhd_encode_picture(), dnxhd_init_rc(), encode_mb_hq(), encode_thread(), estimate_best_b_count(), ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), MPV_decode_mb_internal(), parse_ffconfig(), and xvid_encode_init().

uint16_t* AVCodecContext::intra_matrix

custom intra quantization matrix

encoding: Set by user, can be NULL.
decoding: Set by libavcodec.

Definition at line 1758 of file avcodec.h.

Referenced by avcodec_copy_context(), encode_picture(), ff_MPV_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), new_video_stream(), and xvid_encode_init().

uint16_t* AVCodecContext::inter_matrix

custom inter quantization matrix

encoding: Set by user, can be NULL.
decoding: Set by libavcodec.

Definition at line 1765 of file avcodec.h.

Referenced by avcodec_copy_context(), ff_MPV_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), new_video_stream(), and xvid_encode_init().

int AVCodecContext::scenechange_threshold

scene change detection threshold 0 is default, larger means fewer detected scene changes.

encoding: Set by user.
decoding: unused

Definition at line 1773 of file avcodec.h.

Referenced by encode_frame(), encode_picture(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), X264_init(), and XAVS_init().

int AVCodecContext::noise_reduction

noise reduction strength

encoding: Set by user.
decoding: unused

Definition at line 1780 of file avcodec.h.

Referenced by ff_MPV_encode_init(), frame_start(), init_duplicate_context(), merge_context_after_encode(), update_noise_reduction(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::me_threshold

Motion estimation threshold below which no motion estimation is performed, but instead the user specified motion vectors are used.

encoding: Set by user.
decoding: unused

Definition at line 1789 of file avcodec.h.

Referenced by do_video_out().

int AVCodecContext::mb_threshold

Macroblock threshold below which the user specified macroblock types will be used.

encoding: Set by user.
decoding: unused

Definition at line 1796 of file avcodec.h.

Referenced by ff_MPV_encode_init(), and vpx_init().

int AVCodecContext::intra_dc_precision

precision of the intra DC coefficient - 8

encoding: Set by user.
decoding: unused

Definition at line 1803 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), and ffm_write_header().

int AVCodecContext::skip_top

Number of macroblock rows at the top which are skipped.

encoding: unused
decoding: Set by user.

Definition at line 1810 of file avcodec.h.

Referenced by ff_er_add_slice(), and ff_er_frame_end().

int AVCodecContext::skip_bottom

Number of macroblock rows at the bottom which are skipped.

encoding: unused
decoding: Set by user.

Definition at line 1817 of file avcodec.h.

Referenced by decode_chunks(), and ff_er_frame_end().

float AVCodecContext::border_masking

Border processing masking, raises the quantizer for mbs on the borders of the picture.

encoding: Set by user.
decoding: unused

Definition at line 1825 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_MPV_encode_init().

int AVCodecContext::mb_lmin

minimum MB lagrange multipler

encoding: Set by user.
decoding: unused

Definition at line 1832 of file avcodec.h.

Referenced by adaptive_quantization().

int AVCodecContext::mb_lmax

maximum MB lagrange multipler

encoding: Set by user.
decoding: unused

Definition at line 1839 of file avcodec.h.

Referenced by adaptive_quantization().

int AVCodecContext::me_penalty_compensation

encoding: Set by user.
decoding: unused

Definition at line 1846 of file avcodec.h.

Referenced by encode_picture().

int AVCodecContext::bidir_refine

encoding: Set by user.
decoding: unused

Definition at line 1853 of file avcodec.h.

Referenced by bidir_refine().

int AVCodecContext::brd_scale

encoding: Set by user.
decoding: unused

Definition at line 1860 of file avcodec.h.

Referenced by estimate_best_b_count(), and ff_MPV_encode_init().

int AVCodecContext::keyint_min

minimum GOP size

encoding: Set by user.
decoding: unused

Definition at line 1867 of file avcodec.h.

Referenced by cinepak_encode_init(), encode_frame(), encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flashsv2_encode_frame(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::refs

number of reference frames

encoding: Set by user.
decoding: Set by lavc.

Definition at line 1874 of file avcodec.h.

Referenced by config_props(), encode_init(), ff_h264_decode_slice_header(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), X264_init(), and XAVS_init().

int AVCodecContext::chromaoffset

chroma qp offset from luma

encoding: Set by user.
decoding: unused

Definition at line 1881 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

int AVCodecContext::scenechange_factor

Multiplied by qscale for each frame and added to scene_change_score.

encoding: Set by user.
decoding: unused

Definition at line 1888 of file avcodec.h.

int AVCodecContext::mv0_threshold

Note: Value depends upon the compare function used for fullpel ME.

encoding: Set by user.
decoding: unused

Definition at line 1896 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::b_sensitivity

Adjust sensitivity of b_frame_strategy 1.

encoding: Set by user.
decoding: unused

Definition at line 1903 of file avcodec.h.

Referenced by select_input_picture().

enum AVColorPrimaries AVCodecContext::color_primaries

Chromaticity coordinates of the source primaries.

encoding: Set by user
decoding: Set by libavcodec

Definition at line 1910 of file avcodec.h.

Referenced by decode_frame_header(), decode_sequence_header_adv(), encode_frame(), encode_init(), ff_h264_decode_slice_header(), ff_init_buffer_info(), libschroedinger_encode_init(), mpeg1_encode_sequence_header(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), set_sps(), update_context_from_thread(), and X264_init().

enum AVColorTransferCharacteristic AVCodecContext::color_trc

Color Transfer Characteristic.

encoding: Set by user
decoding: Set by libavcodec

Definition at line 1917 of file avcodec.h.

Referenced by decode_frame_header(), decode_sequence_header_adv(), encode_frame(), ff_h264_decode_slice_header(), ff_init_buffer_info(), libschroedinger_encode_init(), mpeg1_encode_sequence_header(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), set_sps(), update_context_from_thread(), and X264_init().

enum AVColorSpace AVCodecContext::colorspace

YUV colorspace type.

encoding: Set by user
decoding: Set by libavcodec

Definition at line 1924 of file avcodec.h.

Referenced by avcodec_string(), decode_frame(), decode_frame_header(), decode_init(), decode_sequence_header_adv(), encode_frame(), ff_h264_decode_slice_header(), ff_init_buffer_info(), ff_mjpeg_decode_init(), get_pixel_format(), libschroedinger_encode_init(), mpeg1_encode_sequence_header(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), set_sps(), show_stream(), update_context_from_thread(), utvideo_decode_init(), utvideo_encode_init(), and X264_init().

enum AVColorRange AVCodecContext::color_range

MPEG vs JPEG YUV range.

encoding: Set by user
decoding: Set by libavcodec

Definition at line 1931 of file avcodec.h.

Referenced by avcodec_string(), decode_frame(), decode_init(), decode_sequence_header_adv(), dshow_add_device(), ff_h264_decode_slice_header(), ff_init_buffer_info(), ff_mjpeg_decode_sof(), ff_MPV_encode_init(), ff_rtp_send_jpeg(), get_pixel_format(), ljpeg_encode_init(), mov_write_avid_tag(), mpeg_decode_init(), parse_source_parameters(), roq_decode_init(), set_sps(), show_stream(), svq3_decode_init(), update_context_from_thread(), and X264_init().

enum AVChromaLocation AVCodecContext::chroma_sample_location

This defines the location of chroma samples.

encoding: Set by user
decoding: Set by libavcodec

Definition at line 1938 of file avcodec.h.

Referenced by decode_init(), decode_vui_parameters(), encode_frame(), ff_dvvideo_init(), ff_h263_decode_init(), ff_h264_decode_init(), ff_init_buffer_info(), ff_mjpeg_decode_init(), mpeg_decode_init(), transcode_init(), update_context_from_thread(), vp3_decode_init(), yuv4_generate_header(), and yuv4_read_header().

int AVCodecContext::slices

Number of slices.

Indicates number of picture subdivisions. Used for parallelized decoding.

encoding: Set by user
decoding: unused

Definition at line 1947 of file avcodec.h.

Referenced by encode_init(), ff_MPV_common_init(), ff_MPV_encode_init(), utvideo_encode_init(), vpx_init(), and X264_init().

enum AVFieldOrder AVCodecContext::field_order

Field order.

encoding: set by libavcodec
decoding: Set by user.

Definition at line 1953 of file avcodec.h.

Referenced by avui_encode_frame(), avui_encode_init(), decode_frame(), do_video_out(), ff_generate_avci_extradata(), ff_mjpeg_decode_init(), find_compressor(), mov_get_mpeg2_xdcam_codec_tag(), mov_read_fiel(), mov_write_fiel_tag(), mov_write_video_tag(), mxf_parse_structural_metadata(), transcode_init(), yuv4_generate_header(), and yuv4_read_header().

int AVCodecContext::sample_rate

samples per second

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 1956 of file avcodec.h.

Referenced by aac_decode_er_frame(), aac_decode_frame_int(), aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), adp_read_header(), adpcm_encode_init(), adx_encode_header(), adx_encode_init(), adx_read_header(), aea_read_header(), afc_read_header(), aiff_read_header(), aiff_write_header(), alac_encode_init(), amf_parse_object(), amr_decode_fix_avctx(), amr_read_header(), amr_wb_encode_init(), amrnb_decode_init(), amrwb_decode_init(), apc_read_header(), ape_read_header(), apply_param_change(), ast_read_header(), ast_write_header(), audio_encode_example(), audio_read_header(), audio_write_header(), av_get_audio_frame_duration(), avcodec_decode_audio4(), avcodec_encode_audio(), avcodec_open2(), avcodec_string(), avisynth_create_stream_audio(), avpriv_flac_parse_streaminfo(), avr_read_header(), bfi_read_header(), bmv_read_header(), caf_write_header(), cdata_read_header(), cdxl_read_packet(), celt_header(), cin_read_header(), cng_decode_init(), compute_status(), configure_input_audio_filter(), create_audio_stream(), create_new_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), dca_parse(), decklink_setup_audio(), decode_audio(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decode_tag(), decode_wave_header(), do_streamcopy(), dsf_read_header(), dshow_add_device(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), ea_read_header(), encode_init(), epaf_read_header(), Faac_encode_init(), ff_aac_ac3_parse(), ff_adx_decode_header(), ff_af_queue_add(), ff_compute_frame_duration(), ff_get_audio_frame_size(), ff_get_wav_header(), ff_init_buffer_info(), ff_mp4_read_dec_config_descr(), ff_parse_specific_params(), ff_pcm_read_seek(), ff_psy_preprocess_init(), ff_put_wav_header(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_rtp_parse_open(), ff_samples_to_time_base(), ff_spdif_read_packet(), ff_voc_get_packet(), ff_wma_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), find_expected_header(), find_stream_in_feed(), flac_encode_init(), flac_header(), flac_parse(), flv_read_packet(), flv_same_audio_codec(), flv_set_audio_codec(), flv_write_header(), g722_read_header(), g723_1_init(), g729_read_header(), get_aiff_header(), get_audio_flags(), get_best_header(), get_bit_rate(), get_codec_data(), get_sindex(), get_stream_info(), gsm_init(), gsm_read_header(), gxf_write_header(), handle_file(), has_codec_parameters(), idcin_read_header(), iff_read_header(), ilbc_decode_init(), ilbc_encode_init(), ilbc_read_header(), imc_decode_init(), init_bitstream_params(), init_filter(), init_filters(), init_muxer(), init_output_frame(), init_pts(), init_resampler(), ipmovie_read_header(), ircam_read_header(), ircam_write_header(), iss_read_header(), lavfi_read_header(), libcelt_dec_init(), libgsm_decode_init(), libgsm_encode_init(), libopus_decode_init(), libopus_encode_init(), libopus_write_header(), libshine_encode_init(), libspeex_decode_init(), libvorbis_setup(), lvf_read_header(), lxf_read_header(), main(), matroska_parse_block(), matroska_parse_frame(), matroska_parse_tracks(), metasound_decode_init(), mkv_write_block(), mkv_write_track(), mlp_parse(), mmf_read_header(), modplug_read_header(), mov_finalize_stsd_codec(), mov_parse_stsd_audio(), mov_write_audio_tag(), mov_write_esds_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_uuidprof_tag(), movie_query_formats(), mp3_header_decompress(), mp3_write_xing(), mp3lame_encode_init(), MPA_encode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_write_header(), mv_read_header(), mxf_parse_structural_metadata(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_wav_common(), mxg_read_header(), new_audio_stream(), nist_read_header(), nsv_read_chunk(), nut_read_header(), nut_write_header(), ogg_write_header(), ogg_write_packet_internal(), oggvorbis_decode_init(), ogm_dshow_header(), ogm_header(), old_flac_header(), oma_read_header(), oma_write_header(), on2avc_decode_init(), open_audio(), open_output_file(), opus_decode_init(), opus_header(), output_packet(), parse_audio_var(), parse_dsd_prop(), parse_ffconfig(), parse_packet(), parse_strk(), pcm_bluray_parse_header(), pcm_dvd_parse_header(), pcm_encode_init(), pcm_read_header(), pmp_header(), psy_3gpp_init(), pulse_read_header(), pulse_write_header(), pulse_write_packet(), pvf_read_header(), qcp_read_header(), qdm2_decode_init(), r3d_read_reda(), read_desc_chunk(), read_header(), read_header_gme(), read_major_sync(), read_packet(), read_specific_config(), redspark_read_header(), rl2_read_header(), rm_read_audio_stream_info(), rm_write_header(), roq_dpcm_encode_init(), roq_read_packet(), rsd_read_header(), rso_read_header(), rso_write_header(), rtp_write_header(), rv10_write_header(), s302m_parse_frame_header(), sbg_read_header(), sdr2_read_header(), search_for_quantizers_twoloop(), seq_read_header(), set_sample_rate_params(), set_samplerate(), show_stream(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), tak_decode_frame(), tak_read_header(), thp_read_header(), tmv_read_header(), transcode_init(), tta_decode_init(), tta_encode_init(), tta_read_header(), twinvq_decode_init(), twolame_encode_init(), update_context_from_thread(), validate_options(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_init(), voc_write_packet(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_header(), vqf_read_header(), wavesynth_parse_extradata(), wavpack_decode_block(), wavpack_encode_block(), wavpack_encode_init(), wc3_read_header(), wmavoice_decode_init(), write_adaptation_set(), write_audio_frame(), write_manifest(), write_streamheader(), wsaud_read_header(), wsvqa_read_packet(), wv_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), and yop_read_header().

int AVCodecContext::channels

number of audio channels

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 1957 of file avcodec.h.

Referenced by aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), ac3_decode_init(), add_av_stream(), add_codec(), add_input_streams(), add_stream(), adp_read_header(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adpcm_swf_decode(), adx_decode_frame(), adx_decode_init(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), adx_read_packet(), aea_read_header(), afc_read_header(), aiff_write_header(), alac_decode_init(), alac_encode_frame(), alac_encode_init(), allocate_buffers(), amf_parse_object(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amr_wb_encode_init(), amrnb_decode_init(), amrwb_decode_init(), apc_read_header(), ape_decode_init(), ape_read_header(), apply_param_change(), apply_window_and_mdct(), ast_read_header(), ast_read_packet(), ast_write_header(), ast_write_packet(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_init(), audio_decode_example(), audio_encode_example(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_get_audio_frame_duration(), avcodec_decode_audio3(), avcodec_decode_audio4(), avcodec_encode_audio(), avcodec_encode_audio2(), avcodec_open2(), avcodec_string(), avisynth_create_stream_audio(), avpriv_flac_parse_streaminfo(), avr_read_header(), bfi_read_header(), bmv_aud_decode_init(), bmv_read_header(), caf_write_header(), caf_write_trailer(), cdata_read_header(), cdxl_read_packet(), celt_header(), cin_read_header(), cinaudio_decode_init(), cng_decode_init(), cng_encode_init(), compute_status(), configure_input_audio_filter(), configure_output_audio_filter(), construct_perm_table(), cook_decode_init(), cook_parse(), create_audio_stream(), create_new_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), dca_decode_init(), dec_bark_env(), dec_gain(), decklink_setup_audio(), decode_audio(), decode_block(), decode_channel_transform(), decode_decorrelation_matrix(), decode_extension_payload(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decode_subframe(), decode_tilehdr(), decoder_init(), dpcm_decode_frame(), dpcm_decode_init(), dsf_read_header(), dshow_add_device(), dump_context(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_block(), encode_frame(), encode_init(), epaf_read_header(), evrc_decode_init(), Faac_encode_frame(), Faac_encode_init(), fdk_aac_decode_frame(), ff_aac_ac3_parse(), ff_ac3_validate_metadata(), ff_adx_decode_header(), ff_audio_interleave_init(), ff_flac_set_channel_layout(), ff_get_wav_header(), ff_init_buffer_info(), ff_mp4_read_dec_config_descr(), ff_opus_parse_extradata(), ff_pcm_read_seek(), ff_psy_init(), ff_psy_preprocess_end(), ff_psy_preprocess_init(), ff_put_wav_header(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_voc_get_packet(), ff_wma_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_encode_init(), flush(), flv_read_packet(), flv_write_header(), frame_configure_elements(), g722_decode_init(), g722_encode_init(), g722_read_header(), g723_1_decode_init(), g723_1_init(), g729_read_header(), get_aiff_header(), get_audio_flags(), get_best_header(), get_bit_rate(), get_buffer_internal(), get_codec_data(), get_nb_samples(), get_sindex(), get_stream_info(), gsm_init(), gsm_read_header(), guess_channel_layout(), guess_input_channel_layout(), gxf_write_header(), handle_file(), has_codec_parameters(), idcin_read_header(), iff_read_header(), ilbc_decode_init(), ilbc_encode_init(), ilbc_read_header(), imc_decode_block(), imc_decode_frame(), imc_decode_init(), imdct_output(), init_bitstream_params(), init_converted_samples(), init_filter(), init_filters(), init_mdct_win(), init_muxer(), init_resampler(), inverse_channel_transform(), ipmovie_read_header(), ircam_read_header(), ircam_write_header(), iss_read_header(), iss_read_packet(), lame_window_init(), lavfi_read_header(), libcelt_dec_decode(), libcelt_dec_init(), libgsm_decode_init(), libgsm_encode_init(), libopus_decode(), libopus_decode_init(), libopus_encode(), libopus_encode_init(), libopus_write_header(), libshine_encode_init(), libspeex_decode_frame(), libspeex_decode_init(), libvorbis_setup(), lvf_read_header(), lxf_read_header(), mace_decode_frame(), mace_decode_init(), main(), matroska_parse_tracks(), metasound_decode_init(), metasound_read_bitstream(), mlp_parse(), mmf_read_header(), modplug_read_header(), mov_finalize_stsd_codec(), mov_parse_stsd_audio(), mov_read_dac3(), mov_read_dec3(), mov_write_audio_tag(), mov_write_header(), mov_write_isml_manifest(), mov_write_uuidprof_tag(), mp3_header_decompress(), mp3_write_xing(), mp3lame_encode_frame(), mp3lame_encode_init(), MPA_encode_init(), mpc7_decode_init(), mpc8_decode_frame(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mv_read_header(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxf_set_audio_pts(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxg_read_header(), new_audio_stream(), nist_read_header(), nsv_read_chunk(), nut_read_header(), oggvorbis_decode_init(), ogm_dshow_header(), ogm_header(), oma_read_header(), oma_write_header(), on2avc_decode_init(), on2avc_decode_subframe(), open_audio(), open_output_file(), opt_map_channel(), opus_decode_packet(), opus_header(), output_configure(), output_data(), pad_last_frame(), paf_audio_init(), parse_dsd_prop(), parse_ffconfig(), parse_mpeg1waveformatex(), parse_strk(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_decode_init(), pcm_dvd_decode_samples(), pcm_dvd_parse_header(), pcm_encode_frame(), pcm_encode_init(), pcm_read_header(), pmp_header(), pop_output_configuration(), print_enc_params(), psy_3gpp_init(), psy_3gpp_window(), pulse_read_header(), pulse_write_header(), pulse_write_packet(), pvf_read_header(), qcelp_decode_init(), qcp_read_header(), qdm2_decode_init(), r3d_read_red1(), ra144_decode_init(), ra144_encode_init(), ra288_decode_init(), read_and_decode_spectrum(), read_channel_data(), read_desc_chunk(), read_frame_data(), read_header(), read_header_gme(), read_index(), read_major_sync(), read_packet(), read_restart_header(), read_specific_config(), reap_filters(), redspark_read_header(), redspark_read_packet(), revert_channel_correlation(), rl2_read_header(), rm_read_audio_stream_info(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_read_packet(), rsd_read_header(), rso_read_header(), rso_write_header(), rtp_write_packet(), rv10_write_header(), s302m_decode_frame(), s302m_encode2_frame(), s302m_encode_init(), s302m_parse_frame_header(), sbg_read_header(), sdr2_read_header(), search_for_quantizers_twoloop(), seq_read_header(), set_channel_params(), set_channels(), show_stream(), sipr_decoder_init(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smka_decode_frame(), smka_decode_init(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), tak_decode_frame(), tak_read_header(), thp_read_header(), tmv_read_header(), transcode_init(), truespeech_decode_init(), tta_decode_init(), tta_encode_frame(), tta_encode_init(), tta_read_header(), twinvq_decode_init(), twinvq_read_bitstream(), twolame_encode_init(), update_context_from_thread(), validate_options(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_frame(), vmdaudio_decode_init(), voc_write_packet(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vqf_read_header(), wavesynth_decode(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_frame(), wavpack_encode_block(), wavpack_encode_frame(), wavpack_encode_init(), wc3_read_header(), wma_decode_block(), wma_decode_frame(), wmavoice_decode_init(), write_frame(), write_manifest(), write_streamheader(), ws_snd_decode_init(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_packet(), wv_read_header(), xa_read_header(), xa_read_packet(), xmv_read_header(), xwma_read_header(), and yop_read_header().

enum AVSampleFormat AVCodecContext::sample_fmt

audio sample format

encoding: Set by user.
decoding: Set by libavcodec.sample format

Examples:: decoding_encoding.c, demuxing_decoding.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 1964 of file avcodec.h.

Referenced by aac_decode_init(), aacPlus_encode_init(), ac3_decode_init(), add_input_streams(), add_stream(), adpcm_decode_init(), adx_decode_init(), alac_decode_init(), alac_encode_init(), allocate_buffers(), amr_decode_fix_avctx(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), audio_decode_example(), audio_encode_example(), audio_write_frame(), avcodec_decode_audio3(), avcodec_decode_audio4(), avcodec_encode_audio(), avcodec_encode_audio2(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), bmv_aud_decode_init(), choose_sample_fmt(), cinaudio_decode_init(), cng_decode_init(), configure_input_audio_filter(), cook_decode_init(), copy_samples(), dca_decode_frame(), dca_decode_init(), decode_element(), decode_frame(), decode_init(), decoder_init(), dpcm_decode_init(), dprint_options(), dshow_add_device(), eightsvx_decode_init(), evrc_decode_init(), fdk_aac_decode_frame(), fdk_aac_decode_init(), ff_init_buffer_info(), ff_twinvq_decode_init(), fill_buffer(), flac_decode_init(), flac_encode_init(), flac_set_bps(), g722_decode_init(), g723_1_decode_init(), gsm_init(), has_codec_parameters(), ilbc_decode_init(), imc_decode_init(), init_converted_samples(), init_filter(), init_filters(), init_offset(), init_output_frame(), init_resampler(), init_sample_buffers(), lavfi_read_header(), libcelt_dec_init(), libgsm_decode_init(), libopus_decode(), libopus_decode_init(), libopus_encode(), libopus_encode_init(), libspeex_decode_frame(), mace_decode_init(), main(), mkv_write_track(), mlp_parse(), movie_query_formats(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), new_audio_stream(), oggvorbis_decode_init(), on2avc_decode_init(), open_audio(), open_output_file(), opus_decode_init(), output_data(), pad_last_frame(), paf_audio_init(), parse_streaminfo(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_init(), pcm_dvd_parse_header(), pulse_write_frame(), pulse_write_header(), pulse_write_packet(), qcelp_decode_init(), qdm2_decode_init(), ra144_decode_init(), ra288_decode_init(), read_decoding_params(), read_major_sync(), read_restart_header(), s302m_encode_init(), s302m_parse_frame_header(), set_bps_params(), show_stream(), sipr_decoder_init(), smka_decode_frame(), smka_decode_init(), stream_component_open(), tak_decode_frame(), truespeech_decode_init(), tta_decode_init(), tta_encode_frame(), tta_encode_init(), twolame_encode_frame(), update_context_from_thread(), vmdaudio_decode_init(), vorbis_decode_init(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_frame(), wavpack_encode_frame(), wma_decode_init(), wmavoice_decode_init(), write_element(), and ws_snd_decode_init().

int AVCodecContext::frame_size

Number of samples per channel in an audio frame.

encoding: set by libavcodec in avcodec_open2(). Each submitted frame except the last must contain exactly frame_size samples per channel. May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the frame size is not restricted.
decoding: may be set by some decoders to indicate constant frame size

Examples:: decoding_encoding.c, muxing.c, and transcode_aac.c.

Definition at line 1976 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), adpcm_encode_init(), adx_encode_init(), alac_encode_init(), amr_wb_encode_init(), audio_encode_example(), avcodec_encode_audio(), avcodec_encode_audio2(), caf_write_header(), cng_decode_frame(), cng_decode_init(), cng_encode_init(), decode_audio(), decode_frame(), decoder_init(), do_streamcopy(), dprint_compression_options(), encode_frame(), encode_init(), Faac_encode_frame(), Faac_encode_init(), fdk_aac_decode_frame(), ff_ac3_encode_init(), ff_get_audio_frame_size(), ff_mov_write_packet(), ff_parse_specific_params(), ff_psy_preprocess(), ff_put_wav_header(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), flac_encode_init(), flush_encoders(), g722_encode_init(), get_stream_info(), gsm_decode_frame(), gsm_init(), has_codec_parameters(), ilbc_encode_init(), libcelt_dec_decode(), libcelt_dec_init(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_init(), libopus_encode_init(), libshine_encode_frame(), libshine_encode_init(), libvorbis_encode_init(), load_encode_and_write(), matroska_parse_block(), mov_write_audio_tag(), mov_write_header(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_frame(), MPA_encode_init(), mpegts_write_header(), open_audio(), output_packet(), pad_last_frame(), pcm_encode_init(), print_enc_params(), ra144_encode_frame(), ra144_encode_init(), read_header(), read_major_sync(), rm_write_header(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), rtp_write_header(), rv10_write_header(), s302m_encode_init(), sbg_read_header(), sbg_read_packet(), swf_write_audio(), swf_write_header(), transcode_init(), tta_encode_init(), twolame_encode_init(), vorbis_encode_frame(), vorbis_encode_init(), wavpack_encode_frame(), and wavpack_encode_init().

int AVCodecContext::frame_number

Frame counter, set by libavcodec.

decoding: total number of frames returned from the decoder so far.
encoding: total number of frames passed to the encoder so far.

Note
the counter is not incremented if encoding/decoding resulted in an error.

Definition at line 1987 of file avcodec.h.

Referenced by aac_encode_frame(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio2(), avcodec_encode_subtitle(), avcodec_encode_video2(), avcodec_open2(), bfi_decode_frame(), cdg_decode_frame(), decode_band_numwavs(), decode_frame(), decode_packet(), eightsvx_decode_frame(), encode_frame(), ff_eac3_output_frame_header(), ff_h263_decode_picture_header(), ff_mjpeg_decode_end(), flashsv2_encode_frame(), flashsv_encode_frame(), h261_decode_frame(), http_prepare_data(), ipvideo_decode_opcodes(), optimum_use15_7(), qtrle_encode_frame(), rv10_decode_frame(), svq1_encode_end(), svq1_encode_frame(), svq3_decode_frame(), update_context_from_user(), warn_insufficient_frame_quality(), XAVS_frame(), and yop_decode_frame().

int AVCodecContext::block_align

number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.

Definition at line 1993 of file avcodec.h.

Referenced by adpcm_decode_frame(), adpcm_encode_init(), aea_read_header(), aea_read_packet(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_trailer(), apc_read_header(), asf_write_header1(), ast_write_trailer(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_frame(), atrac3_decode_init(), atrac3p_decode_frame(), atrac3p_decode_init(), av_get_audio_frame_duration(), avi_read_header(), avi_write_packet(), avr_read_header(), caf_write_header(), caf_write_packet(), caf_write_trailer(), cook_decode_frame(), cook_decode_init(), daud_header(), decode_frame(), decode_init(), decode_packet(), dsf_read_header(), dsf_read_packet(), dxa_read_header(), ea_read_header(), encode_frame(), encode_init(), encode_superframe(), epaf_read_header(), ff_get_audio_frame_size(), ff_get_wav_header(), ff_parse_specific_params(), ff_pcm_read_packet(), ff_pcm_read_seek(), ff_put_wav_header(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_twinvq_decode_frame(), ff_twinvq_decode_init(), ff_wma_init(), film_read_header(), g729_read_header(), g729_read_packet(), get_aiff_header(), get_mode(), get_nb_samples(), get_sindex(), gsm_decode_frame(), gsm_init(), gsm_parse(), handle_file(), idcin_read_header(), iff_read_header(), iff_read_packet(), ilbc_encode_init(), ilbc_parse_fmtp(), ilbc_parse_sdp_line(), ilbc_read_header(), ilbc_read_packet(), ilbc_write_header(), init_muxer(), ipmovie_read_header(), ircam_read_header(), ism_write_header(), iss_read_header(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_frame(), libgsm_encode_init(), matroska_parse_block(), matroska_parse_rm_audio(), matroska_parse_tracks(), mov_finalize_stsd_codec(), mov_write_header(), mov_write_isml_manifest(), mxf_write_d10_audio_packet(), mxf_write_wav_common(), mxg_read_header(), nist_read_header(), oma_read_header(), oma_read_packet(), oma_write_header(), parse_strk(), pcm_encode_init(), pcm_read_header(), pvf_read_header(), ra288_decode_frame(), ra288_decode_init(), read_desc_chunk(), read_header(), read_packet(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_packet(), rsd_read_header(), rsd_read_packet(), rso_read_header(), rtp_send_ilbc(), seq_read_header(), sipr_decoder_init(), sox_read_header(), str_read_packet(), transcode_init(), tta_decode_init(), twinvq_decode_init(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_frame(), vmdaudio_decode_init(), wc3_read_header(), wma_decode_init(), wma_decode_superframe(), wmavoice_decode_init(), wmavoice_decode_packet(), xmv_read_header(), xwma_read_header(), and xwma_read_packet().

int AVCodecContext::cutoff

Audio cutoff bandwidth (0 means "automatic")

encoding: Set by user.
decoding: unused

Definition at line 2000 of file avcodec.h.

Referenced by aac_encode_init(), aacPlus_encode_init(), Faac_encode_init(), ff_psy_preprocess_init(), libopus_configure_encoder(), libopus_encode_init(), libvorbis_setup(), psy_3gpp_init(), and validate_options().

attribute_deprecated int AVCodecContext::request_channels

Decoder should decode to this many channels if it can (0 for default)

encoding: unused
decoding: Set by user.
Deprecated:
Deprecated in favor of request_channel_layout.

Definition at line 2009 of file avcodec.h.

Referenced by ac3_decode_init(), dca_decode_frame(), dca_decode_init(), ff_aac_ac3_parse(), mlp_parse(), and read_restart_header().

uint64_t AVCodecContext::channel_layout

Audio channel layout.

encoding: set by user.
decoding: set by user, may be overwritten by libavcodec.

Examples:: decoding_encoding.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 2017 of file avcodec.h.

Referenced by aac_encode_init(), ac3_decode_frame(), add_input_streams(), add_stream(), adp_read_header(), aea_read_header(), afc_read_header(), aiff_write_header(), alac_decode_init(), amf_parse_object(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amrnb_decode_init(), amrwb_decode_init(), apc_read_header(), ape_decode_init(), apply_param_change(), ast_read_header(), atrac3p_decode_init(), audio_encode_example(), avcodec_decode_audio4(), avcodec_open2(), avcodec_string(), avpriv_flac_parse_streaminfo(), bfi_read_header(), bmv_aud_decode_init(), bmv_read_header(), caf_write_header(), cdata_read_header(), cdxl_read_packet(), cin_read_header(), cinaudio_decode_init(), configure_input_audio_filter(), configure_output_audio_filter(), cook_decode_init(), create_audio_stream(), create_new_audio_stream(), daud_header(), dca_decode_frame(), decode_audio(), decode_frame(), decode_init(), dprint_options(), dsf_read_header(), dv_extract_audio_info(), encode_init(), evrc_decode_init(), ff_aac_ac3_parse(), ff_alsa_open(), ff_flac_set_channel_layout(), ff_init_buffer_info(), ff_mov_read_chan(), ff_opus_parse_extradata(), ff_put_wav_header(), flac_encode_init(), flac_read_header(), flac_write_header(), flv_read_packet(), g722_decode_init(), g723_1_decode_init(), g723_1_init(), get_best_header(), get_codec_data(), get_sindex(), get_stream_info(), gsm_init(), gsm_read_header(), guess_channel_layout(), guess_input_channel_layout(), idcin_read_header(), iff_read_header(), ilbc_decode_init(), imc_decode_init(), init_filter(), init_filters(), init_output_frame(), ipmovie_read_header(), iss_read_header(), lavfi_read_header(), libgsm_decode_init(), libopus_decode_init(), libspeex_decode_init(), libvorbis_setup(), matroska_parse_flac(), metasound_decode_init(), mlp_parse(), mmf_read_header(), mov_read_dac3(), mov_read_dec3(), mov_write_chan_tag(), mov_write_header(), movie_common_init(), movie_query_formats(), mpc7_decode_init(), mpc8_decode_init(), mpc_read_header(), mpegps_read_packet(), mxg_read_header(), oma_read_header(), on2avc_decode_init(), open_audio(), open_output_file(), output_configure(), paf_audio_init(), parse_dsd_prop(), parse_mpeg1waveformatex(), parse_waveformatex(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pop_output_configuration(), pulse_write_header(), put_flac_codecpriv(), qcelp_decode_init(), qcp_read_header(), qdm2_decode_init(), ra144_decode_init(), ra288_decode_init(), read_header(), read_major_sync(), read_restart_header(), rm_read_audio_stream_info(), roq_read_packet(), rso_read_header(), s302m_parse_frame_header(), sbg_read_header(), seq_read_header(), set_channel_params(), set_channels(), show_stream(), sipr_decoder_init(), smacker_read_header(), smka_decode_init(), sol_read_header(), speex_header(), str_read_packet(), stream_component_open(), tak_decode_frame(), tak_read_header(), tmv_read_header(), transcode_init(), truespeech_decode_init(), tta_decode_init(), twinvq_decode_init(), update_context_from_thread(), validate_options(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), vorbis_decode_frame(), vorbis_decode_init(), wavpack_decode_block(), wavpack_encode_block(), wavpack_encode_init(), wc3_read_header(), wmavoice_decode_init(), ws_snd_decode_init(), wsaud_read_header(), wv_read_header(), and yop_read_header().

uint64_t AVCodecContext::request_channel_layout

Request decoder to use this channel layout if it can (0 for default)

encoding: unused
decoding: Set by user.

Definition at line 2024 of file avcodec.h.

Referenced by ac3_decode_frame(), ac3_decode_init(), dca_decode_frame(), dca_decode_init(), dca_filter_channels(), ff_aac_ac3_parse(), mlp_parse(), output_configure(), and read_restart_header().

enum AVAudioServiceType AVCodecContext::audio_service_type

Type of service that the audio stream conveys.

encoding: Set by user.
decoding: Set by libavcodec.

Definition at line 2031 of file avcodec.h.

Referenced by ac3_decode_frame(), avformat_find_stream_info(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_ac3_validate_metadata(), mov_read_dac3(), mov_read_dec3(), and transcode_init().

enum AVSampleFormat AVCodecContext::request_sample_fmt

desired sample format

encoding: Not used.
decoding: Set by user. Decoder will decode to this format if it can.

Definition at line 2039 of file avcodec.h.

Referenced by alac_decode_init(), decode_init(), flac_set_bps(), and libopus_decode_init().

attribute_deprecated int(* AVCodecContext::get_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called at the beginning of each frame to get a buffer for it.

The function will set AVFrame.data[], AVFrame.linesize[]. AVFrame.extended_data[] must also be set, but it should be the same as AVFrame.data[] except for planar audio with more channels than can fit in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as many data pointers as it can hold.

if CODEC_CAP_DR1 is not set then get_buffer() must call avcodec_default_get_buffer() instead of providing buffers allocated by some other means.

AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't need it. avcodec_default_get_buffer() aligns the output buffer properly, but if get_buffer() is overridden then alignment considerations should be taken into account.

See Also: avcodec_default_get_buffer()

Video:

If pic.reference is set then the frame will be read later by libavcodec. avcodec_align_dimensions2() should be used to find the required width and height, as they normally need to be rounded up to the next multiple of 16.

If frame multithreading is used and thread_safe_callbacks is set, it may be called from a different thread, but not from more than one at once. Does not need to be reentrant.

See Also: release_buffer(), reget_buffer(); avcodec_align_dimensions2()

Audio:

Decoders request a buffer of a particular size by setting AVFrame.nb_samples prior to calling get_buffer(). The decoder may, however, utilize only part of the buffer by setting AVFrame.nb_samples to a smaller value in the output frame.

Decoders cannot use the buffer after returning from avcodec_decode_audio4(), so they will not call release_buffer(), as it is assumed to be released immediately upon return. In some rare cases, a decoder may need to call get_buffer() more than once in a single call to avcodec_decode_audio4(). In that case, when get_buffer() is called again after it has already been called once, the previously acquired buffer is assumed to be released at that time and may not be reused by the decoder.

As a convenience, av_samples_get_buffer_size() and av_samples_fill_arrays() in libavutil may be used by custom get_buffer() functions to find the required data size and to fill data pointers and linesize. In AVFrame.linesize, only linesize[0] may be set for audio since all planes must be the same size.

See Also: av_samples_get_buffer_size(), av_samples_fill_arrays()

encoding: unused
decoding: Set by libavcodec, user can override.

Deprecated:: use get_buffer2()

Definition at line 2105 of file avcodec.h.

Referenced by avcodec_decode_audio3(), ff_thread_release_buffer(), get_buffer_internal(), restore_context(), set_context(), submit_packet(), thread_get_buffer_internal(), and update_context_from_user().

attribute_deprecated void(* AVCodecContext::release_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called to release buffers which were allocated with get_buffer.

A released buffer can be reused in get_buffer(). pic.data[*] must be set to NULL. May be called from a different thread if frame multithreading is used, but not by more than one thread at once, so does not need to be reentrant.

encoding: unused
decoding: Set by libavcodec, user can override.

Deprecated:: custom freeing callbacks should be set from get_buffer2()

Definition at line 2119 of file avcodec.h.

Referenced by avcodec_decode_audio3(), compat_free_buffer(), get_buffer_internal(), and update_context_from_user().

attribute_deprecated int(* AVCodecContext::reget_buffer)(struct AVCodecContext *c, AVFrame *pic)

Called at the beginning of a frame to get cr buffer for it.

Buffer type (size, hints) must be the same. libavcodec won't check it. libavcodec will pass previous buffer in pic, function should return same buffer or new buffer with old frame "painted" into it. If pic.data[0] == NULL must behave like get_buffer(). if CODEC_CAP_DR1 is not set then reget_buffer() must call avcodec_default_reget_buffer() instead of providing buffers allocated by some other means.

encoding: unused
decoding: Set by libavcodec, user can override.

Definition at line 2134 of file avcodec.h.

int(* AVCodecContext::get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags)

This callback is called at the beginning of each frame to get data buffer(s) for it.

There may be one contiguous buffer for all the data or there may be a buffer per each data plane or anything in between. What this means is, you may set however many entries in buf[] you feel necessary. Each buffer must be reference-counted using the AVBuffer API (see description of buf[] below).

The following fields will be set in the frame before this callback is called:

format
width, height (video only)
sample_rate, channel_layout, nb_samples (audio only) Their values may differ from the corresponding values in AVCodecContext. This callback must use the frame values, not the codec context values, to calculate the required buffer size.

This callback must fill the following fields in the frame:

data[]
linesize[]
extended_data:
- if the data is planar audio with more than 8 channels, then this callback must allocate and fill extended_data to contain all pointers to all data planes. data[] must hold as many pointers as it can. extended_data must be allocated with av_malloc() and will be freed in av_frame_unref().
- otherwise exended_data must point to data
buf[] must contain one or more pointers to AVBufferRef structures. Each of the frame's data and extended_data pointers must be contained in these. That is, one AVBufferRef for each allocated chunk of memory, not necessarily one AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(), and av_buffer_ref().
extended_buf and nb_extended_buf must be allocated with av_malloc() by this callback and filled with the extra buffers if there are more buffers than buf[] can hold. extended_buf will be freed in av_frame_unref().

If CODEC_CAP_DR1 is not set then get_buffer2() must call avcodec_default_get_buffer2() instead of providing buffers allocated by some other means.

Each data plane must be aligned to the maximum required by the target CPU.

See Also: avcodec_default_get_buffer2()

Video:

If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused (read and/or written to if it is writable) later by libavcodec.

avcodec_align_dimensions2() should be used to find the required width and height, as they normally need to be rounded up to the next multiple of 16.

Some decoders do not support linesizes changing between frames.

If frame multithreading is used and thread_safe_callbacks is set, this callback may be called from a different thread, but not from more than one at once. Does not need to be reentrant.

See Also: avcodec_align_dimensions2()

Audio:

Decoders request a buffer of a particular size by setting AVFrame.nb_samples prior to calling get_buffer2(). The decoder may, however, utilize only part of the buffer by setting AVFrame.nb_samples to a smaller value in the output frame.

As a convenience, av_samples_get_buffer_size() and av_samples_fill_arrays() in libavutil may be used by custom get_buffer2() functions to find the required data size and to fill data pointers and linesize. In AVFrame.linesize, only linesize[0] may be set for audio since all planes must be the same size.

See Also: av_samples_get_buffer_size(), av_samples_fill_arrays()

encoding: unused
decoding: Set by libavcodec, user can override.

Definition at line 2217 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), ff_thread_release_buffer(), get_buffer_internal(), init_input_stream(), restore_context(), set_context(), submit_packet(), thread_get_buffer_internal(), and update_context_from_user().

int AVCodecContext::refcounted_frames

If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted and are valid indefinitely.

The caller must free them with av_frame_unref() when they are not needed anymore. Otherwise, the decoded frames must not be freed by the caller and are only valid until the next decode call.

encoding: unused
decoding: set by the caller before avcodec_open2().

Definition at line 2230 of file avcodec.h.

Referenced by avcodec_decode_video2(), avcodec_flush_buffers(), open_stream(), and smvjpeg_decode_init().

float AVCodecContext::qcompress

amount of qscale change between easy & hard scenes (0.0-1.0)

Definition at line 2233 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_qscale(), vpx_init(), X264_init(), and XAVS_init().

float AVCodecContext::qblur

amount of qscale smoothing over time (0.0-1.0)

Definition at line 2234 of file avcodec.h.

Referenced by add_codec(), ff_rate_control_init(), ff_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), X264_init(), and XAVS_init().

int AVCodecContext::qmin

minimum quantizer

encoding: Set by user.
decoding: unused

Definition at line 2241 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), encode_thread(), ff_init_qscale_tab(), ff_MPV_encode_init(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), parse_ffconfig(), update_qscale(), vpx_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::qmax

maximum quantizer

encoding: Set by user.
decoding: unused

Definition at line 2248 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), dnxhd_encode_init(), dnxhd_encode_rdo(), dnxhd_find_qscale(), dnxhd_init_qmat(), dnxhd_init_rc(), encode_thread(), ff_init_qscale_tab(), ff_MPV_encode_init(), ff_vbv_update(), ff_xvid_rate_estimate_qscale(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), parse_ffconfig(), update_qscale(), vpx_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::max_qdiff

maximum quantizer difference between frames

encoding: Set by user.
decoding: unused

Definition at line 2255 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), parse_ffconfig(), X264_init(), and XAVS_init().

float AVCodecContext::rc_qsquish

ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.

encoding: Set by user.
decoding: unused

Definition at line 2263 of file avcodec.h.

Referenced by modify_qscale().

float AVCodecContext::rc_qmod_amp

Definition at line 2265 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_qmod_freq

Definition at line 2266 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_buffer_size

decoder bitstream buffer size

encoding: Set by user.
decoding: unused

Definition at line 2273 of file avcodec.h.

Referenced by add_codec(), avcodec_open2(), ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_rate_control_init(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), init_pass2(), load_input_picture(), modify_qscale(), mov_write_esds_tag(), mpeg1_decode_sequence(), mpeg1_encode_sequence_header(), mpeg_decode_sequence_extension(), mpeg_mux_init(), parse_ffconfig(), select_input_picture(), transcode_init(), vpx_init(), X264_frame(), X264_init(), and XAVS_init().

int AVCodecContext::rc_override_count

ratecontrol override, see RcOverride

encoding: Allocated/set/freed by user.
decoding: unused

Definition at line 2280 of file avcodec.h.

Referenced by avcodec_copy_context(), get_qscale(), and new_video_stream().

RcOverride* AVCodecContext::rc_override

Definition at line 2281 of file avcodec.h.

Referenced by avcodec_copy_context(), get_qscale(), and new_video_stream().

const char* AVCodecContext::rc_eq

rate control equation

encoding: Set by user
decoding: unused

Definition at line 2288 of file avcodec.h.

Referenced by add_codec(), avcodec_copy_context(), ff_rate_control_init(), ffm2_read_header(), ffm_close(), ffm_read_header(), ffm_write_header(), and get_qscale().

int AVCodecContext::rc_max_rate

maximum bitrate

encoding: Set by user.
decoding: Set by libavcodec.

Definition at line 2295 of file avcodec.h.

Referenced by add_codec(), av_find_best_stream(), avcodec_string(), ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_rate_control_init(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), libvorbis_setup(), modify_qscale(), mov_write_esds_tag(), mpeg1_encode_sequence_header(), mpeg_decode_postinit(), mpeg_mux_init(), mpegvideo_extract_headers(), mxf_write_header(), parse_ffconfig(), show_stream(), transcode_init(), vpx_init(), X264_frame(), X264_init(), and XAVS_init().

int AVCodecContext::rc_min_rate

minimum bitrate

encoding: Set by user.
decoding: unused

Definition at line 2302 of file avcodec.h.

Referenced by ff_MPV_encode_init(), ff_MPV_encode_picture(), ff_vbv_update(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), libvorbis_setup(), modify_qscale(), parse_ffconfig(), and vpx_init().

float AVCodecContext::rc_buffer_aggressivity

Definition at line 2304 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), modify_qscale(), and vpx_init().

float AVCodecContext::rc_initial_cplx

initial complexity for pass1 ratecontrol

encoding: Set by user.
decoding: unused

Definition at line 2311 of file avcodec.h.

Referenced by ff_rate_control_init().

float AVCodecContext::rc_max_available_vbv_use

Ratecontrol attempt to use, at maximum, of what can be used without an underflow.

encoding: Set by user.
decoding: unused.

Definition at line 2318 of file avcodec.h.

Referenced by ff_MPV_encode_picture(), ff_rate_control_init(), and modify_qscale().

float AVCodecContext::rc_min_vbv_overflow_use

Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.

encoding: Set by user.
decoding: unused.

Definition at line 2325 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_initial_buffer_occupancy

Number of bits which should be loaded into the rc buffer before decoding starts.

encoding: Set by user.
decoding: unused

Definition at line 2332 of file avcodec.h.

Referenced by avcodec_open2(), ff_rate_control_init(), ff_xvid_rate_control_init(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::coder_type

coder type

encoding: Set by user.
decoding: unused

Definition at line 2344 of file avcodec.h.

Referenced by encode_frame(), encode_init(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), libschroedinger_encode_init(), read_extra_header(), read_header(), sunrast_encode_init(), targa_encode_frame(), and X264_init().

int AVCodecContext::context_model

context model

encoding: Set by user.
decoding: unused

Definition at line 2351 of file avcodec.h.

Referenced by encode_init(), encode_plane(), encode_rgb_frame(), encode_slice_header(), ff_frame_thread_encoder_init(), and write_header().

int AVCodecContext::lmin

minimum Lagrange multiplier

encoding: Set by user.
decoding: unused

Definition at line 2358 of file avcodec.h.

Referenced by get_qminmax().

int AVCodecContext::lmax

maximum Lagrange multiplier

encoding: Set by user.
decoding: unused

Definition at line 2365 of file avcodec.h.

Referenced by ff_MPV_encode_picture(), and get_qminmax().

int AVCodecContext::frame_skip_threshold

frame skip threshold

encoding: Set by user.
decoding: unused

Definition at line 2372 of file avcodec.h.

Referenced by MPV_decode_mb_internal(), select_input_picture(), skip_check(), and vpx_init().

int AVCodecContext::frame_skip_factor

frame skip factor

encoding: Set by user.
decoding: unused

Definition at line 2379 of file avcodec.h.

Referenced by MPV_decode_mb_internal(), select_input_picture(), and skip_check().

int AVCodecContext::frame_skip_exp

frame skip exponent

encoding: Set by user.
decoding: unused

Definition at line 2386 of file avcodec.h.

Referenced by skip_check().

int AVCodecContext::frame_skip_cmp

frame skip comparison function

encoding: Set by user.
decoding: unused

Definition at line 2393 of file avcodec.h.

Referenced by add_codec(), ff_MPV_encode_init(), ffm2_read_header(), ffm_read_header(), and ffm_write_header().

int AVCodecContext::trellis

trellis RD quantization

encoding: Set by user.
decoding: unused

Definition at line 2400 of file avcodec.h.

Referenced by adpcm_compress_trellis(), adpcm_encode_init(), encode_block(), encode_end(), encode_init(), ff_dct_encode_init(), ff_MPV_encode_init(), g722_encode_init(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::min_prediction_order

encoding: Set by user.
decoding: unused

Definition at line 2406 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

int AVCodecContext::max_prediction_order

encoding: Set by user.
decoding: unused

Definition at line 2412 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

int64_t AVCodecContext::timecode_frame_start

GOP timecode frame start number.

encoding: Set by user, in non drop frame format
decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset)

Definition at line 2419 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), encode_init(), mpeg1_encode_sequence_header(), mpeg_decode_gop(), and show_stream().

void(* AVCodecContext::rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb)

Definition at line 2427 of file avcodec.h.

Referenced by encode_thread().

int AVCodecContext::rtp_payload_size

Definition at line 2429 of file avcodec.h.

Referenced by encode_thread(), ff_MPV_encode_init(), and X264_init().

int AVCodecContext::mv_bits

Definition at line 2437 of file avcodec.h.

Referenced by encode_frame(), and ff_MPV_encode_picture().

int AVCodecContext::header_bits

Definition at line 2438 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::i_tex_bits

Definition at line 2439 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::p_tex_bits

Definition at line 2440 of file avcodec.h.

Referenced by encode_frame(), and ff_MPV_encode_picture().

int AVCodecContext::i_count

Definition at line 2441 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::p_count

Definition at line 2442 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::skip_count

Definition at line 2443 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::misc_bits

Definition at line 2444 of file avcodec.h.

Referenced by encode_frame(), and ff_MPV_encode_picture().

int AVCodecContext::frame_bits

number of bits used for the previously encoded frame

encoding: Set by libavcodec.
decoding: unused

Definition at line 2451 of file avcodec.h.

Referenced by aac_encode_frame(), encode_frame(), and ff_MPV_encode_picture().

char* AVCodecContext::stats_out

pass1 encoding statistics output buffer

encoding: Set by libavcodec.
decoding: unused

Definition at line 2458 of file avcodec.h.

Referenced by avcodec_encode_video2(), do_video_out(), encode_close(), encode_end(), encode_frame(), encode_init(), ff_MPV_encode_end(), ff_MPV_encode_init(), ff_write_pass1_stats(), ffv1_close(), flush_encoders(), get_stats(), vp8_encode(), vp8_free(), xvid_encode_close(), and xvid_encode_frame().

char* AVCodecContext::stats_in

pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.

encoding: Allocated/set/freed by user.
decoding: unused

Definition at line 2466 of file avcodec.h.

Referenced by encode_init(), ff_rate_control_init(), submit_stats(), transcode(), vpx_init(), and xvid_encode_init().

int AVCodecContext::workaround_bugs

Work around bugs in encoders which sometimes cannot be detected automatically.

encoding: Set by user
decoding: Set by user

Definition at line 2473 of file avcodec.h.

Referenced by ff_h263_decode_init(), ff_h264_decode_init(), ff_mpeg4_set_direct_mv(), and stream_component_open().

int AVCodecContext::strict_std_compliance

strictly follow the standard (MPEG4, ...).

encoding: Set by user.
decoding: Set by user. Setting this to STRICT or higher means the encoder and decoder will generally do stupid things, whereas setting it to unofficial or lower will mean the encoder might produce output that is not supported by all spec-compliant decoders. Decoders don't differentiate between normal, unofficial and experimental (that is, they always try to decode things when they can) unless they are explicitly asked to behave stupidly (=strictly conform to the specs)

Definition at line 2507 of file avcodec.h.

Referenced by amr_wb_encode_init(), amv_encode_picture(), avcodec_open2(), choose_pix_fmts(), choose_pixel_fmt(), config(), config_props(), decode_frame(), decode_postinit(), dvbsub_parse_clut_segment(), encode_frame(), encode_init(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ff_MPV_encode_init(), ff_put_wav_header(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), flv_write_header(), libgsm_encode_init(), libx265_encode_init(), ljpeg_encode_init(), mov_get_codec_tag(), parse_ffconfig(), set_default_channel_config(), validate_codec_tag(), and yuv4_write_header().

int AVCodecContext::error_concealment

error concealment flags

encoding: unused
decoding: Set by user.

Definition at line 2519 of file avcodec.h.

Referenced by ff_er_add_slice(), ff_er_frame_end(), ff_er_frame_start(), guess_mv(), and is_intra_more_likely().

int AVCodecContext::debug

debug

encoding: Set by user.
decoding: Set by user.

Definition at line 2529 of file avcodec.h.

Referenced by audio_get_buffer(), check_keyboard_interaction(), decode_chunks(), decode_ext_header(), decode_fill(), decode_frame(), decode_frame_packing_arrangement(), decode_init(), decode_nal_units(), decode_picture_timing(), decode_recovery_point(), decode_unregistered_user_data(), decode_vol_header(), decode_vop_header(), dvbsub_decode(), ff_dct_common_init(), ff_er_frame_end(), ff_flv_decode_picture_header(), ff_frame_thread_init(), ff_h263_show_pict_info(), ff_h264_decode_picture_parameter_set(), ff_h264_decode_sei(), ff_h264_decode_seq_parameter_set(), ff_h264_decode_slice_header(), ff_h264_execute_ref_pic_marking(), ff_hevc_decode_nal_sps(), ff_jpegls_decode_lse(), ff_jpegls_decode_picture(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sos(), ff_mpeg4_decode_picture_header(), ff_mpeg4_workaround_bugs(), ff_MPV_frame_start(), ff_msmpeg4_decode_picture_header(), ff_print_debug_info2(), ff_rate_estimate_qscale(), ff_thread_await_progress(), ff_thread_release_buffer(), ff_thread_report_progress(), ff_vbv_update(), ff_wmv2_decode_secondary_picture_header(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), find_short(), libschroedinger_decode_init(), libschroedinger_encode_init(), mjpeg_decode_app(), mjpeg_decode_com(), mjpegb_decode_frame(), modify_qscale(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_gop(), mpeg_decode_picture_display_extension(), mpeg_decode_sequence_display_extension(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), MPV_decode_mb_internal(), parse_avid(), parse_ffconfig(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_dvd_parse_header(), predict_slice(), predict_slice_buffered(), print_long_term(), print_short_term(), read_extra_header(), remove_short(), rv10_decode_init(), rv20_decode_picture_header(), svq3_decode_frame(), truemotion1_decode_header(), update_context_from_user(), vc1_decode_frame(), and video_get_buffer().

int AVCodecContext::debug_mv

debug Code outside libavcodec should access this field using AVOptions

encoding: Set by user.
decoding: Set by user.

Definition at line 2563 of file avcodec.h.

Referenced by alloc_picture_tables(), ff_frame_thread_init(), ff_print_debug_info2(), and update_context_from_user().

int AVCodecContext::err_recognition

Error recognition; may misdetect some more or less valid parts as errors.

encoding: unused
decoding: Set by user.

Definition at line 2574 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_frame(), avcodec_decode_audio4(), avcodec_decode_video2(), decode(), decode_chunks(), decode_frame(), decode_init(), decode_nal_unit(), decode_nal_units(), decode_region_inter(), decode_region_masked(), decode_rle(), decode_slice(), display_end_segment(), ff_ccitt_unpack(), ff_er_frame_end(), ff_h263_decode_frame(), ff_h264_decode_slice_header(), ff_h264_execute_ref_pic_marking(), ff_hevc_decode_nal_sps(), ff_hevc_decode_nal_vps(), ff_mjpeg_decode_frame(), ff_MPV_frame_start(), flac_decode_frame(), h261_decode_gob_header(), hevc_decode_frame(), hls_slice_header(), init_dimensions(), mjpegb_decode_frame(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg4_decode_mb(), mpeg_decode_frame(), mpeg_decode_slice(), mxpeg_decode_frame(), opus_decode_frame(), opus_decode_subpacket(), parse_presentation_segment(), pcx_decode_frame(), read_specific_config(), slice_decode_thread(), tak_decode_frame(), tiff_decode_tag(), tta_decode_frame(), v410_decode_init(), vc1_decode_frame(), wavpack_decode_block(), wv_unpack_mono(), and wv_unpack_stereo().

int64_t AVCodecContext::reordered_opaque

opaque 64bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque

Deprecated:

in favor of pkt_pts

encoding: unused
decoding: Set by user.

Definition at line 2600 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), ff_init_buffer_info(), Stagefright_decode_frame(), and update_context_from_user().

struct AVHWAccel* AVCodecContext::hwaccel

Hardware accelerator in use.

encoding: unused.
decoding: Set by libavcodec

Definition at line 2607 of file avcodec.h.

Referenced by alloc_frame_buffer(), alloc_picture(), avcodec_close(), avcodec_copy_context(), decode_chunks(), decode_nal_units(), decode_postinit(), decode_slice(), er_supported(), ff_blockdsp_init_x86(), ff_er_add_slice(), ff_er_frame_end(), ff_get_format(), ff_h263_decode_frame(), ff_h264_execute_decode_slices(), ff_h264_field_end(), ff_MPV_frame_start(), ff_print_debug_info2(), frame_size_alloc(), get_buffer_internal(), get_consumed_bytes(), h264_frame_start(), is_intra_more_likely(), mpeg_decode_slice(), mpeg_field_start(), MPV_decode_mb_internal(), setup_hwaccel_for_pixfmt(), slice_end(), update_context_from_thread(), and vc1_decode_frame().

void* AVCodecContext::hwaccel_context

Hardware accelerator context.

For some hardware accelerators, a global context needs to be provided by the user. In that case, this holds display-dependent data FFmpeg cannot instantiate itself. Please refer to the FFmpeg HW accelerator documentation to know how to fill this is. e.g. for VA API, this is a struct vaapi_context.

encoding: unused
decoding: Set by user

Definition at line 2619 of file avcodec.h.

Referenced by commit_bitstream_and_slice_buffer(), dxva2_alloc(), dxva2_create_decoder(), dxva2_h264_decode_slice(), dxva2_h264_start_frame(), dxva2_mpeg2_start_frame(), dxva2_uninit(), dxva2_vc1_start_frame(), ff_dxva2_common_end_frame(), ff_vaapi_common_end_frame(), ff_vaapi_mpeg_end_frame(), ff_vda_default_init(), fill_slice_long(), restore_context(), set_context(), update_context_from_thread(), vaapi_h264_decode_slice(), vaapi_h264_end_frame(), vaapi_h264_start_frame(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), vaapi_vc1_start_frame(), vda_h264_end_frame(), vda_old_h264_decode_slice(), vda_old_h264_end_frame(), vda_old_h264_start_frame(), vdpau_alloc(), vdpau_h264_end_frame(), vdpau_init(), and vdpau_uninit().

uint64_t AVCodecContext::error[AV_NUM_DATA_POINTERS]

error

encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
decoding: unused

Definition at line 2626 of file avcodec.h.

Referenced by encode_frame(), estimate_best_b_count(), ff_MPV_encode_picture(), print_report(), and storeframe().

int AVCodecContext::dct_algo

DCT algorithm, see FF_DCT_* below.

encoding: Set by user.
decoding: unused

Definition at line 2633 of file avcodec.h.

Referenced by ff_dct_encode_init_x86(), ff_fdctdsp_init(), ff_fdctdsp_init_ppc(), ff_fdctdsp_init_x86(), ff_MPV_common_init_ppc(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), and parse_ffconfig().

int AVCodecContext::idct_algo

IDCT algorithm, see FF_IDCT_* below.

encoding: Set by user.
decoding: Set by user.

Definition at line 2646 of file avcodec.h.

Referenced by decode_init(), ff_idctdsp_init(), ff_idctdsp_init_alpha(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv5te(), ff_idctdsp_init_armv6(), ff_idctdsp_init_neon(), ff_idctdsp_init_ppc(), ff_idctdsp_init_x86(), ff_mpeg4_workaround_bugs(), parse_ffconfig(), setup_hwaccel_for_pixfmt(), smvjpeg_decode_init(), and update_context_from_thread().

int AVCodecContext::bits_per_coded_sample

bits per sample/pixel from the demuxer (needed for huffyuv).

encoding: Set by libavcodec.
decoding: Set by user.

Definition at line 2676 of file avcodec.h.

Referenced by aasc_decode_frame(), aasc_decode_init(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), aiff_write_header(), amf_parse_object(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), av_get_audio_frame_duration(), avformat_find_stream_info(), avi_read_header(), avi_write_header(), avr_read_header(), avs_read_packet(), avui_decode_frame(), bfi_read_header(), bmp_encode_frame(), bmp_encode_init(), cin_read_header(), cine_read_header(), cinepak_decode_init(), cmap_read_palette(), create_audio_stream(), daud_header(), decode_frame(), decode_init(), decode_wave_header(), dshow_add_device(), ea_read_header(), encode_frame(), encode_init(), epaf_read_header(), fbdev_write_packet(), ff_get_bmp_header(), ff_get_wav_header(), ff_put_bmp_header(), ff_put_wav_header(), ff_voc_get_packet(), film_read_header(), flv_read_packet(), flv_same_audio_codec(), flv_set_audio_codec(), g722_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), get_nb_samples(), get_packet_header(), get_sindex(), ico_write_packet(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), ipvideo_decode_init(), ircam_read_header(), iss_read_header(), lag_decode_frame(), lvf_read_header(), matroska_parse_tracks(), mkv_write_track(), mmf_read_header(), mov_get_rawvideo_codec_tag(), mov_parse_stsd_audio(), mov_parse_stsd_video(), mov_write_video_tag(), mpc8_read_header(), mpc_read_header(), msrle_decode_frame(), msrle_decode_init(), msvideo1_decode_init(), mv_read_header(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxg_read_header(), nist_read_header(), nsv_parse_NSVs_header(), nuv_header(), oma_read_header(), parse_audio_var(), parse_media_type(), parse_strk(), parse_waveformatex(), pcm_bluray_parse_header(), pcm_dvd_decode_samples(), pcm_dvd_parse_header(), pcm_encode_init(), pcm_read_header(), png_enc_init(), pvf_read_header(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_init(), raw_encode_init(), raw_init_decoder(), read_desc_chunk(), read_header(), read_packet(), rl2_read_header(), roq_read_packet(), rpl_read_header(), rtp_write_packet(), scan_file(), seq_read_header(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smka_decode_init(), sox_read_header(), tak_decode_init(), tak_read_header(), targa_encode_frame(), tmv_read_header(), transcode_init(), tta_decode_init(), tta_read_header(), update_context_from_thread(), utvideo_encode_init(), vfw_read_header(), vid_read_packet(), vivo_read_header(), vmd_read_header(), vmdaudio_decode_init(), voc_write_packet(), wc3_read_header(), wsaud_read_header(), wsvqa_read_packet(), wv_read_header(), xmv_read_header(), xsub_encoder_init(), xwma_read_header(), and y41p_encode_init().

int AVCodecContext::bits_per_raw_sample

Bits per sample/pixel of internal libavcodec pixel/sample format.

encoding: set by user.
decoding: set by libavcodec.

Definition at line 2683 of file avcodec.h.

Referenced by alac_decode_init(), alac_encode_frame(), alac_encode_init(), avcodec_string(), avpriv_flac_parse_streaminfo(), cllc_decode_frame(), copy_samples(), decode_channel(), decode_frame(), decode_init(), decode_plane(), decode_rgb_frame(), dnxhd_decode_header(), dnxhd_encode_init(), encode_init(), ff_blockdsp_init(), ff_dct_common_init(), ff_fdctdsp_init(), ff_h264_decode_init(), ff_h264_decode_slice_header(), ff_h264_set_parameter_from_sps(), ff_h264_update_thread_context(), ff_idctdsp_init(), ff_mjpeg_decode_sof(), ff_mpegvideoencdsp_init_x86(), ff_pixblockdsp_init(), fic_decode_init(), fill_buffer(), flac_encode_frame(), flac_encode_init(), get_siz(), init_frame(), init_sample_buffers(), libopenjpeg_decode_frame(), mlp_parse(), new_video_stream(), pcm_bluray_parse_header(), pcm_decode_init(), pcm_dvd_parse_header(), pnm_decode_frame(), prores_encode_init(), read_const_block_data(), read_extra_header(), read_header(), read_major_sync(), read_var_block_data(), s302m_decode_frame(), s302m_encode2_frame(), s302m_encode_init(), s302m_parse_frame_header(), set_bps_params(), tak_decode_frame(), tak_decode_init(), transcode_init(), tta_decode_init(), tta_encode_init(), update_context_from_thread(), update_md5_sum(), utvideo_decode_init(), v410_decode_init(), vble_decode_init(), wavpack_decode_frame(), wavpack_encode_frame(), write_element(), write_streaminfo(), y216_decode_init(), y41p_decode_init(), zero12v_decode_init(), and zerocodec_decode_init().

int AVCodecContext::lowres

low resolution decoding, 1-> 1/2 size, 2->1/4 size

encoding: unused
decoding: Set by user. Code outside libavcodec should access this field using: av_codec_{get,set}_lowres(avctx)

Definition at line 2693 of file avcodec.h.

Referenced by avcodec_align_dimensions2(), avcodec_open2(), chroma_4mv_motion_lowres(), decode_slice(), dv_decode_video_segment(), dvvideo_decode_init(), ff_er_frame_end(), ff_h263_decode_picture_header(), ff_idctdsp_init(), ff_idctdsp_init_alpha(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv5te(), ff_idctdsp_init_armv6(), ff_idctdsp_init_neon(), ff_idctdsp_init_ppc(), ff_idctdsp_init_x86(), ff_init_block_index(), ff_intel_h263_decode_picture_header(), ff_mjpeg_decode_sof(), ff_MPV_decode_mb(), ff_msmpeg4_pred_dc(), ff_set_dimensions(), ff_update_block_index(), get_buffer_internal(), hpel_motion_lowres(), init(), libopenjpeg_decode_frame(), mjpeg_decode_scan(), mjpeg_decode_scan_progressive_ac(), mpeg_decode_slice(), mpeg_motion_lowres(), MPV_decode_mb_internal(), MPV_motion_lowres(), rv20_decode_picture_header(), and shift_output().

AVFrame* AVCodecContext::coded_frame

the picture in the bitstream

encoding: Set by libavcodec.
decoding: unused

Definition at line 2701 of file avcodec.h.

Referenced by a64multi_close_encoder(), a64multi_encode_frame(), a64multi_encode_init(), avcodec_close(), avcodec_encode_audio(), avcodec_encode_video(), avui_encode_close(), avui_encode_frame(), avui_encode_init(), bmp_encode_close(), bmp_encode_frame(), bmp_encode_init(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_encode_picture(), dnxhd_load_picture(), do_video_out(), do_video_stats(), dvvideo_encode_close(), dvvideo_encode_frame(), dvvideo_encode_init(), encode_close(), encode_end(), encode_frame(), encode_init(), encode_init_ls(), encode_slice(), ff_MPV_encode_init(), filter(), filter_frame(), find_quant_thread(), flashsv_encode_end(), flashsv_encode_frame(), flashsv_encode_init(), frame_end(), gif_encode_close(), gif_encode_init(), libopenjpeg_encode_close(), libopenjpeg_encode_init(), libschroedinger_encode_close(), libschroedinger_encode_frame(), libschroedinger_encode_init(), libx265_encode_close(), libx265_encode_init(), ljpeg_encode_close(), ljpeg_encode_init(), pam_encode_close(), pam_encode_init(), pcx_encode_close(), pcx_encode_init(), png_enc_close(), png_enc_init(), pnm_encode_close(), pnm_encode_init(), print_report(), prores_encode_close(), prores_encode_init(), qtrle_encode_end(), qtrle_encode_frame(), qtrle_encode_init(), qtrle_encode_line(), raw_encode_init(), roq_encode_video(), sunrast_encode_close(), svq1_encode_end(), svq1_encode_frame(), svq1_encode_init(), svq1_encode_plane(), targa_encode_close(), targa_encode_init(), update_context_from_thread(), utvideo_decode_close(), utvideo_decode_frame(), utvideo_decode_init(), utvideo_encode_close(), utvideo_encode_frame(), utvideo_encode_init(), v308_encode_close(), v308_encode_frame(), v308_encode_init(), v408_encode_close(), v408_encode_frame(), v408_encode_init(), v410_encode_close(), v410_encode_frame(), v410_encode_init(), v4l2_read_packet(), vp8_encode(), vp8_free(), vpx_init(), X264_close(), X264_frame(), X264_init(), XAVS_close(), XAVS_frame(), XAVS_init(), xface_encode_close(), xface_encode_init(), xvid_encode_frame(), xvid_encode_init(), y41p_encode_close(), y41p_encode_frame(), y41p_encode_init(), yuv4_encode_close(), yuv4_encode_frame(), and yuv4_encode_init().

int AVCodecContext::thread_count

thread count is used to decide how many independent tasks should be passed to execute()

encoding: Set by user.
decoding: Set by user.

Definition at line 2709 of file avcodec.h.

Referenced by avcodec_close(), avcodec_open2(), avformat_find_stream_info(), decode_chunks(), decode_end(), decode_init(), decode_init_thread_copy(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_load_picture(), dxva2_create_decoder(), encode_close(), encode_init(), ff_alloc_entries(), ff_frame_thread_encoder_free(), ff_frame_thread_encoder_init(), ff_frame_thread_init(), ff_h264_alloc_tables(), ff_MPV_common_init(), ff_MPV_encode_init(), ff_slice_thread_free(), ff_slice_thread_init(), ff_thread_decode_frame(), ff_thread_flush(), ff_thread_free(), ff_thread_video_encode_frame(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), h264_slice_header_init(), hevc_decode_init(), libx265_encode_init(), thread_execute(), update_context_from_thread(), update_dimensions(), utvideo_encode_init(), validate_thread_parameters(), vp78_decode_frame(), vpx_init(), worker(), X264_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::thread_type

Which multithreading methods to use.

Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, so clients which cannot provide future frames should not use it.

encoding: Set by user, otherwise the default is used.
decoding: Set by user, otherwise the default is used.

Definition at line 2719 of file avcodec.h.

Referenced by ff_frame_thread_encoder_init(), validate_thread_parameters(), and X264_init().

int AVCodecContext::active_thread_type

Which multithreading methods are in use by the codec.

encoding: Set by libavcodec.
decoding: Set by libavcodec.

Definition at line 2728 of file avcodec.h.

Referenced by avcodec_close(), avcodec_decode_audio4(), avcodec_decode_video2(), avcodec_encode_video2(), avcodec_flush_buffers(), avcodec_open2(), await_reference_mb_row(), decode_chunks(), decode_nal_units(), decode_slice(), dxva2_create_decoder(), ff_alloc_entries(), ff_er_add_slice(), ff_frame_thread_encoder_init(), ff_frame_thread_init(), ff_h264_decode_slice_header(), ff_h264_field_end(), ff_mjpeg_encode_stuffing(), ff_MPV_common_init(), ff_MPV_frame_start(), ff_rv34_decode_frame(), ff_slice_thread_init(), ff_thread_can_start_frame(), ff_thread_finish_setup(), ff_thread_free(), ff_thread_get_format(), ff_thread_init(), ff_thread_release_buffer(), finish_frame(), h264_slice_header_init(), hevc_decode_init(), jpeg_table_header(), mimic_decode_frame(), mpeg_field_start(), MPV_decode_mb_internal(), render_slice(), rv34_decode_mv(), rv34_decode_slice(), rv34_mc(), slice_end(), thread_execute(), thread_get_buffer_internal(), update_dimensions(), validate_thread_parameters(), vp3_decode_frame(), vp3_draw_horiz_band(), vp78_decode_frame(), vp78_decode_mb_row_sliced(), and vp9_decode_frame().

int AVCodecContext::thread_safe_callbacks

Set by the client if its custom get_buffer() callback can be called synchronously from another thread, which allows faster multithreaded decoding.

draw_horiz_band() will be called from other threads regardless of this setting. Ignored if the default get_buffer() is used.

encoding: Set by user.
decoding: Set by user.

Definition at line 2738 of file avcodec.h.

Referenced by ff_thread_get_format(), ff_thread_release_buffer(), init_input_stream(), submit_packet(), thread_get_buffer_internal(), and update_context_from_user().

int(* AVCodecContext::execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)

The codec may call this to execute several independent things.

It will return only after finishing all tasks. The user may replace this with some multithreaded implementation, the default implementation will execute the parts serially.

Parameters

count

the number of things to execute

encoding: Set by libavcodec, user can override.
decoding: Set by libavcodec, user can override.

Definition at line 2749 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), decode_chunks(), decode_component(), decode_frame(), decode_lowdelay(), decode_picture(), dvvideo_decode_frame(), dvvideo_encode_frame(), encode_frame(), encode_picture(), ff_h264_execute_decode_slices(), ff_slice_thread_init(), fic_decode_frame(), and hls_slice_data().

int(* AVCodecContext::execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)

The codec may call this to execute several independent things.

It will return only after finishing all tasks. The user may replace this with some multithreaded implementation, the default implementation will execute the parts serially. Also see avcodec_thread_init and e.g. the –enable-pthread configure option.

Parameters

c	context passed also to func
count	the number of things to execute
arg2	argument passed unchanged to func
ret	return values of executed functions, must have space for "count" values. May be NULL.
func	function that will be called count times, with jobnr from 0 to count-1. threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no two instances of func executing at the same time will have the same threadnr.

Returns

always 0 currently, but code should handle a future improvement where when any call to func returns < 0 no further calls to func may be done and < 0 is returned.

encoding: Set by libavcodec, user can override.
decoding: Set by libavcodec, user can override.

Definition at line 2769 of file avcodec.h.

Referenced by avcodec_get_context_defaults3(), decode_frame(), decode_picture(), dnxhd_encode_fast(), dnxhd_encode_picture(), dnxhd_encode_rdo(), dnxhd_find_qscale(), encode_frame(), ff_slice_thread_init(), ff_vp56_decode_frame(), hls_slice_data_wpp(), and vp78_decode_frame().

attribute_deprecated void* AVCodecContext::thread_opaque

Deprecated:: this field should not be used from outside of lavc

Definition at line 2776 of file avcodec.h.

int AVCodecContext::nsse_weight

noise vs.

sse weight for the nsse comparison function

encoding: Set by user.
decoding: unused

Definition at line 2784 of file avcodec.h.

Referenced by add_codec(), ffm2_read_header(), ffm_read_header(), ffm_write_header(), hadamard_func(), nsse16_c(), and nsse8_c().

int AVCodecContext::profile

profile

encoding: Set by user.
decoding: Set by libavcodec.

Definition at line 2791 of file avcodec.h.

Referenced by aac_decode_er_frame(), aac_decode_frame_int(), aac_encode_init(), aacPlus_encode_init(), av_vdpau_get_profile(), avcodec_string(), avpriv_dirac_parse_sequence_header(), dca_decode_frame(), decode_extension_payload(), dxva2_init(), encode_init(), encode_slice(), Faac_encode_init(), ff_h264_decode_slice_header(), get_siz(), hls_slice_header(), mpeg1_encode_sequence_header(), mpeg4_decode_profile_level(), mpeg4_encode_visual_object_header(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), mxf_get_mpeg2_codec_ul(), mxf_parse_mpeg2_frame(), mxf_write_mpegvideo_desc(), parse_nal_units(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), read_sbr_extension(), show_stream(), update_context_from_thread(), vc1_decode_init(), vpx_init(), and X264_init().

int AVCodecContext::level

level

encoding: Set by user.
decoding: Set by libavcodec.

Definition at line 2875 of file avcodec.h.

Referenced by avpriv_dirac_parse_sequence_header(), encode_init(), ff_h264_decode_slice_header(), hls_slice_header(), mpeg1_encode_sequence_header(), mpeg4_decode_profile_level(), mpeg4_encode_visual_object_header(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), mxf_get_mpeg2_codec_ul(), mxf_parse_mpeg2_frame(), mxf_write_mpegvideo_desc(), parse_nal_units(), show_stream(), update_context_from_thread(), vc1_decode_init(), X264_init(), and XAVS_init().

enum AVDiscard AVCodecContext::skip_loop_filter

Skip loop filtering for selected frames.

encoding: unused
decoding: Set by user.

Definition at line 2883 of file avcodec.h.

Referenced by decode_wmv9(), ff_h264_decode_slice_header(), ff_vc1_decode_entry_point(), ff_vc1_decode_sequence_header(), vc1_decode_p_blocks(), and vp78_decode_frame().

enum AVDiscard AVCodecContext::skip_idct

Skip IDCT/dequantization for selected frames.

encoding: unused
decoding: Set by user.

Definition at line 2890 of file avcodec.h.

Referenced by MPV_decode_mb_internal().

enum AVDiscard AVCodecContext::skip_frame

Skip decoding for selected frames.

encoding: unused
decoding: Set by user.

Definition at line 2897 of file avcodec.h.

Referenced by decode_chunks(), decode_frame(), decode_nal_units(), ff_h263_decode_frame(), ff_h264_decode_slice_header(), ff_rv34_decode_frame(), h261_decode_frame(), h264_decode_frame(), svq1_decode_frame(), svq3_decode_frame(), vc1_decode_frame(), and vp78_decode_frame().

uint8_t* AVCodecContext::subtitle_header

Header containing style information for text subtitles.

For SUBTITLE_ASS subtitle type, it should contain the whole ASS [Script Info] and [V4+ Styles] section, plus the [Events] line and the Format line following. It shouldn't include any Dialogue line.

encoding: Set/allocated/freed by user (before avcodec_open2())
decoding: Set/allocated/freed by libavcodec (by avcodec_open2())

Definition at line 2907 of file avcodec.h.

Referenced by ass_decode_init(), ass_encode_init(), avcodec_copy_context(), avcodec_free_context(), avcodec_open2(), ff_ass_subtitle_header(), ff_free_stream(), mov_text_encode_init(), srt_encode_init(), and webvtt_encode_init().

int AVCodecContext::subtitle_header_size

Definition at line 2908 of file avcodec.h.

Referenced by ass_decode_init(), ass_encode_init(), avcodec_copy_context(), and ff_ass_subtitle_header().

attribute_deprecated int AVCodecContext::error_rate

Deprecated:: use the 'error_rate' private AVOption of the mpegvideo encoders

Definition at line 2916 of file avcodec.h.

Referenced by ff_MPV_encode_init().

attribute_deprecated AVPacket* AVCodecContext::pkt

Deprecated:: this field is not supposed to be accessed from outside lavc

Definition at line 2924 of file avcodec.h.

uint64_t AVCodecContext::vbv_delay

VBV delay coded in the last frame (in periods of a 27 MHz clock).

Used for compliant TS muxing.

encoding: Set by libavcodec.
decoding: unused.

Definition at line 2933 of file avcodec.h.

Referenced by ff_MPV_encode_picture().

int AVCodecContext::side_data_only_packets

Encoding only.

Allow encoders to output packets that do not contain any encoded data, only side data.

Some encoders need to output such packets, e.g. to update some stream parameters at the end of encoding.

All callers are strongly recommended to set this option to 1 and update their code to deal with such packets, since this behaviour may become always enabled in the future (then this option will be deprecated and later removed). To avoid ABI issues when this happens, the callers should use AVOptions to set this field.

Definition at line 2948 of file avcodec.h.

Referenced by flac_encode_frame().

AVRational AVCodecContext::pkt_timebase

Timebase in which pkt_dts/pts and AVPacket.dts/pts are.

Code outside libavcodec should access this field using: av_codec_{get,set}_pkt_timebase(avctx)

encoding unused.
decoding set by user.

Definition at line 2957 of file avcodec.h.

Referenced by avcodec_decode_audio4(), avcodec_decode_subtitle2(), decode_frame(), and teletext_decode_frame().

const AVCodecDescriptor* AVCodecContext::codec_descriptor

AVCodecDescriptor Code outside libavcodec should access this field using: av_codec_{get,set}_codec_descriptor(avctx)

encoding: unused.
decoding: set by libavcodec.

Definition at line 2966 of file avcodec.h.

Referenced by avcodec_decode_subtitle2(), and avcodec_open2().

int64_t AVCodecContext::pts_correction_num_faulty_pts

Current statistics for PTS correction.

decoding: maintained and used by libavcodec, not intended to be used by user apps
encoding: unused

Definition at line 2984 of file avcodec.h.

Referenced by avcodec_open2(), guess_correct_pts(), and video_refresh().

int64_t AVCodecContext::pts_correction_num_faulty_dts

Number of incorrect PTS values so far.

Definition at line 2985 of file avcodec.h.

Referenced by avcodec_open2(), guess_correct_pts(), and video_refresh().

int64_t AVCodecContext::pts_correction_last_pts

Number of incorrect DTS values so far.

Definition at line 2986 of file avcodec.h.

Referenced by avcodec_flush_buffers(), avcodec_open2(), and guess_correct_pts().

int64_t AVCodecContext::pts_correction_last_dts

PTS of the last frame.

Definition at line 2987 of file avcodec.h.

Referenced by avcodec_flush_buffers(), avcodec_open2(), and guess_correct_pts().

char* AVCodecContext::sub_charenc

DTS of the last frame.

Character encoding of the input subtitles file.

decoding: set by user
encoding: unused

Definition at line 2994 of file avcodec.h.

Referenced by avcodec_open2(), and recode_subtitle().

int AVCodecContext::sub_charenc_mode

Subtitles character encoding mode.

Formats or codecs might be adjusting this setting (if they are doing the conversion themselves for instance).

decoding: set by libavcodec
encoding: unused

Definition at line 3002 of file avcodec.h.

Referenced by avcodec_open2(), and recode_subtitle().

int AVCodecContext::skip_alpha

Skip processing alpha if supported by codec.

Note that if the format uses pre-multiplied alpha (common with VP6, and recommended due to better video quality/compression) the image will look as if alpha-blended onto a black background. However for formats that do not use pre-multiplied alpha there might be serious artefacts (though e.g. libswscale currently assumes pre-multiplied alpha anyway). Code outside libavcodec should access this field using AVOptions

decoding: set by user
encoding: unused

Definition at line 3020 of file avcodec.h.

Referenced by decode_frame_header(), ff_vp56_init_context(), and read_header().

int AVCodecContext::seek_preroll

Number of samples to skip after a discontinuity.

decoding: unused
encoding: set by libavcodec

Definition at line 3027 of file avcodec.h.

uint16_t* AVCodecContext::chroma_intra_matrix

custom intra quantization matrix Code outside libavcodec should access this field using av_codec_g/set_chroma_intra_matrix()

encoding: Set by user, can be NULL.
decoding: unused.

Definition at line 3048 of file avcodec.h.

Referenced by encode_picture(), and new_video_stream().

The documentation for this struct was generated from the following file:

libavcodec/avcodec.h

height	the height of the slice
y	the y position of the slice
type	1->top field, 2->bottom field, 3->frame
offset	offset into the AVFrame.data from which the slice should be read

Data Fields

Detailed Description

Field Documentation