AVCodecContext Struct Reference

main external API structure. More...

#include <avcodec.h>

Data Fields
const AVClass *	av_class
	information on struct for av_log set by avcodec_alloc_context3
int	bit_rate
	the average bitrate encoding: Set by user; unused for constant quantizer encoding.
int	bit_rate_tolerance
	number of bits the bitstream is allowed to diverge from the reference.
int	flags
	CODEC_FLAG_*.
int	sub_id
	Some codecs need additional format info.
int	me_method
	Motion estimation algorithm used for video coding.
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	width
	picture width / height.
int	height
int	gop_size
	the number of pictures in a group of pictures, or 0 for intra_only encoding: Set by user.
enum PixelFormat	pix_fmt
	Pixel format, see PIX_FMT_xxx.
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.
int	sample_rate
	samples per second
int	channels
	number of audio channels
enum AVSampleFormat	sample_fmt
	audio sample format encoding: Set by user.
int	frame_size
	Samples per packet, initialized when calling 'init'.
int	frame_number
	audio or video frame number
int	delay
	Encoding: Number of frames delay there will be from the encoder input to the decoder output.
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 encoding: Set by user.
int	qmax
	maximum quantizer encoding: Set by user.
int	max_qdiff
	maximum quantizer difference between frames encoding: Set by user.
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
struct AVCodec *	codec
void *	priv_data
int	rtp_payload_size
void(*	rtp_callback )(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
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 encoding: Set by libavcodec.
void *	opaque
	Private data of the user, can be used to carry app specific stuff.
char	codec_name [32]
enum AVMediaType	codec_type
enum CodecID	codec_id
unsigned int	codec_tag
	fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int	workaround_bugs
	Work around bugs in encoders which sometimes cannot be detected automatically.
int	luma_elim_threshold
	luma single coefficient elimination threshold encoding: Set by user.
int	chroma_elim_threshold
	chroma single coeff elimination threshold encoding: Set by user.
int	strict_std_compliance
	strictly follow the standard (MPEG4, .
float	b_quant_offset
	qscale offset between IP and B-frames encoding: Set by user.
attribute_deprecated int	error_recognition
	Error recognition; higher values will detect more errors but may misdetect some more or less valid parts as errors.
int(*	get_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of each frame to get a buffer for it.
void(*	release_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called to release buffers which were allocated with get_buffer.
int	has_b_frames
	Size of the frame reordering buffer in the decoder.
int	block_align
	number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
attribute_deprecated int	parse_only
	If true, only parsing is done.
int	mpeg_quant
	0-> h263 quant 1-> mpeg quant encoding: Set by user.
char *	stats_out
	pass1 encoding statistics output buffer encoding: Set by libavcodec.
char *	stats_in
	pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.
float	rc_qsquish
	ratecontrol qmin qmax limiting method 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
float	rc_qmod_amp
int	rc_qmod_freq
RcOverride *	rc_override
	ratecontrol override, see RcOverride encoding: Allocated/set/freed by user.
int	rc_override_count
const char *	rc_eq
	rate control equation encoding: Set by user decoding: unused
int	rc_max_rate
	maximum bitrate encoding: Set by user.
int	rc_min_rate
	minimum bitrate encoding: Set by user.
int	rc_buffer_size
	decoder bitstream buffer size encoding: Set by user.
float	rc_buffer_aggressivity
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 encoding: Set by user.
float	rc_initial_cplx
	initial complexity for pass1 ratecontrol encoding: Set by user.
int	dct_algo
	DCT algorithm, see FF_DCT_* below encoding: Set by user.
float	lumi_masking
	luminance masking (0-> disabled) encoding: Set by user.
float	temporal_cplx_masking
	temporary complexity masking (0-> disabled) encoding: Set by user.
float	spatial_cplx_masking
	spatial complexity masking (0-> disabled) encoding: Set by user.
float	p_masking
	p block masking (0-> disabled) encoding: Set by user.
float	dark_masking
	darkness masking (0-> disabled) encoding: Set by user.
int	idct_algo
	IDCT algorithm, see FF_IDCT_* below.
int	slice_count
	slice count encoding: Set by libavcodec.
int *	slice_offset
	slice offsets in the frame in bytes encoding: Set/allocated by libavcodec.
int	error_concealment
	error concealment flags encoding: unused decoding: Set by user.
unsigned	dsp_mask
	dsp_mask could be add used to disable unwanted CPU features CPU features (i.e.
int	bits_per_coded_sample
	bits per sample/pixel from the demuxer (needed for huffyuv).
int	prediction_method
	prediction method (needed for huffyuv) encoding: Set by user.
AVRational	sample_aspect_ratio
	sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
AVFrame *	coded_frame
	the picture in the bitstream encoding: Set by libavcodec.
int	debug
	debug encoding: Set by user.
int	debug_mv
	debug encoding: Set by user.
uint64_t	error [AV_NUM_DATA_POINTERS]
	error encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
int	me_cmp
	motion estimation comparison function encoding: Set by user.
int	me_sub_cmp
	subpixel motion estimation comparison function encoding: Set by user.
int	mb_cmp
	macroblock comparison function (not supported yet) encoding: Set by user.
int	ildct_cmp
	interlaced DCT comparison function encoding: Set by user.
int	dia_size
	ME diamond size & shape encoding: Set by user.
int	last_predictor_count
	amount of previous MV predictors (2a+1 x 2a+1 square) encoding: Set by user.
int	pre_me
	prepass for motion estimation encoding: Set by user.
int	me_pre_cmp
	motion estimation prepass comparison function encoding: Set by user.
int	pre_dia_size
	ME prepass diamond size & shape encoding: Set by user.
int	me_subpel_quality
	subpel ME quality encoding: Set by user.
enum PixelFormat(*	get_format )(struct AVCodecContext *s, const enum PixelFormat *fmt)
	callback to negotiate the pixelFormat
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 encoding: Set by user.
int	inter_quant_bias
	inter quantizer bias encoding: Set by user.
int	color_table_id
	color table ID encoding: unused decoding: Which clrtable should be used for 8bit RGB images.
attribute_deprecated int	internal_buffer_count
	internal_buffer count Don't touch, used by libavcodec default_get_buffer().
attribute_deprecated void *	internal_buffer
	internal_buffers Don't touch, used by libavcodec default_get_buffer().
int	global_quality
	Global quality for codecs which cannot change it per frame.
int	coder_type
	coder type encoding: Set by user.
int	context_model
	context model encoding: Set by user.
int	slice_flags
	slice flags encoding: unused decoding: Set by user.
int	xvmc_acceleration
	XVideo Motion Acceleration encoding: forbidden decoding: set by decoder.
int	mb_decision
	macroblock decision mode encoding: Set by user.
uint16_t *	intra_matrix
	custom intra quantization matrix encoding: Set by user, can be NULL.
uint16_t *	inter_matrix
	custom inter quantization matrix encoding: Set by user, can be NULL.
unsigned int	stream_codec_tag
	fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int	scenechange_threshold
	scene change detection threshold 0 is default, larger means fewer detected scene changes.
int	lmin
	minimum Lagrange multipler encoding: Set by user.
int	lmax
	maximum Lagrange multipler encoding: Set by user.
struct AVPaletteControl *	palctrl
	palette control structure encoding: ??? (no palette-enabled encoder yet) decoding: Set by user.
int	noise_reduction
	noise reduction strength encoding: Set by user.
int(*	reget_buffer )(struct AVCodecContext *c, AVFrame *pic)
	Called at the beginning of a frame to get cr buffer for it.
int	rc_initial_buffer_occupancy
	Number of bits which should be loaded into the rc buffer before decoding starts.
int	inter_threshold
	encoding: Set by user.
int	flags2
	CODEC_FLAG2_* encoding: Set by user.
int	error_rate
	Simulates errors in the bitstream to test error concealment.
attribute_deprecated int	antialias_algo
	MP3 antialias algorithm, see FF_AA_* below.
int	quantizer_noise_shaping
	quantizer noise shaping encoding: Set by user.
int	thread_count
	thread count is used to decide how many independent tasks should be passed to execute() encoding: Set by user.
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.
void *	thread_opaque
	thread opaque Can be used by execute() to store some per AVCodecContext stuff.
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 encoding: Set by user.
int	nsse_weight
	noise vs.
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.
int	profile
	profile encoding: Set by user.
int	level
	level encoding: Set by user.
int	lowres
	low resolution decoding, 1-> 1/2 size, 2->1/4 size encoding: unused decoding: Set by user.
int	coded_width
	Bitstream width / height, may be different from width/height if lowres enabled.
int	coded_height
int	frame_skip_threshold
	frame skip threshold encoding: Set by user.
int	frame_skip_factor
	frame skip factor encoding: Set by user.
int	frame_skip_exp
	frame skip exponent encoding: Set by user.
int	frame_skip_cmp
	frame skip comparison function encoding: Set by user.
float	border_masking
	Border processing masking, raises the quantizer for mbs on the borders of the picture.
int	mb_lmin
	minimum MB lagrange multipler encoding: Set by user.
int	mb_lmax
	maximum MB lagrange multipler encoding: Set by user.
int	me_penalty_compensation
	encoding: Set by user.
enum AVDiscard	skip_loop_filter
	encoding: unused decoding: Set by user.
enum AVDiscard	skip_idct
	encoding: unused decoding: Set by user.
enum AVDiscard	skip_frame
	encoding: unused decoding: Set by user.
int	bidir_refine
	encoding: Set by user.
int	brd_scale
	encoding: Set by user.
attribute_deprecated float	crf
	constant rate factor - quality-based VBR - values ~correspond to qps encoding: Set by user.
attribute_deprecated int	cqp
	constant quantization parameter rate control method encoding: Set by user.
int	keyint_min
	minimum GOP size encoding: Set by user.
int	refs
	number of reference frames encoding: Set by user.
int	chromaoffset
	chroma qp offset from luma encoding: Set by user.
attribute_deprecated int	bframebias
	Influence how often B-frames are used.
int	trellis
	trellis RD quantization encoding: Set by user.
attribute_deprecated float	complexityblur
	Reduce fluctuations in qp (before curve compression).
attribute_deprecated int	deblockalpha
	in-loop deblocking filter alphac0 parameter alpha is in the range -6.
attribute_deprecated int	deblockbeta
	in-loop deblocking filter beta parameter beta is in the range -6.
attribute_deprecated int	partitions
	macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4 encoding: Set by user.
attribute_deprecated int	directpred
	direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto) encoding: Set by user.
int	cutoff
	Audio cutoff bandwidth (0 means "automatic") encoding: Set by user.
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.
int	compression_level
	encoding: Set by user.
int	min_prediction_order
	encoding: Set by user.
int	max_prediction_order
	encoding: Set by user.
int64_t	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).
int	request_channels
	Decoder should decode to this many channels if it can (0 for default) encoding: unused decoding: Set by user.
attribute_deprecated float	drc_scale
	Percentage of dynamic range compression to be applied by the decoder.
int64_t	reordered_opaque
	opaque 64bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
int	bits_per_raw_sample
	Bits per sample/pixel of internal libavcodec pixel/sample format.
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) encoding: unused decoding: Set by user.
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.
struct AVHWAccel *	hwaccel
	Hardware accelerator in use encoding: unused.
int	ticks_per_frame
	For some codecs, the time base is closer to the field rate than the frame rate.
void *	hwaccel_context
	Hardware accelerator context.
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(*	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 int	weighted_p_pred
	explicit P-frame weighted prediction analysis method 0: off 1: fast blind weighting (one reference duplicate with -1 offset) 2: smart weighting (full fade detection analysis) encoding: Set by user.
attribute_deprecated int	aq_mode
	AQ mode 0: Disabled 1: Variance AQ (complexity mask) 2: Auto-variance AQ (experimental) encoding: Set by user decoding: unused.
attribute_deprecated float	aq_strength
	AQ strength Reduces blocking and blurring in flat and textured areas.
attribute_deprecated float	psy_rd
	PSY RD Strength of psychovisual optimization encoding: Set by user decoding: unused.
attribute_deprecated float	psy_trellis
	PSY trellis Strength of psychovisual optimization encoding: Set by user decoding: unused.
attribute_deprecated int	rc_lookahead
	RC lookahead Number of frames for frametype and ratecontrol lookahead encoding: Set by user decoding: unused.
attribute_deprecated float	crf_max
	Constant rate factor maximum With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse than crf_max, even if doing so would violate VBV restrictions.
int	log_level_offset
attribute_deprecated enum AVLPCType	lpc_type
	Determine which LPC analysis algorithm to use.
attribute_deprecated int	lpc_passes
	Number of passes to use for Cholesky factorization during LPC analysis encoding: Set by user decoding: unused.
int	slices
	Number of slices.
uint8_t *	subtitle_header
	Header containing style information for text subtitles.
int	subtitle_header_size
AVPacket *	pkt
	Current packet as passed into the decoder, to avoid having to pass the packet into every function.
attribute_deprecated int	is_copy
	Whether this is a copy of the context which had init() called on it.
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 from another thread, which allows faster multithreaded decoding.
uint64_t	vbv_delay
	VBV delay coded in the last frame (in periods of a 27 MHz clock).
enum AVAudioServiceType	audio_service_type
	Type of service that the audio stream conveys.
enum AVSampleFormat	request_sample_fmt
	desired sample format encoding: Not used.
int	err_recognition
	Error recognition; may misdetect some more or less valid parts as errors.
struct AVCodecInternal *	internal
	Private context used for internal data.
enum AVFieldOrder	field_order
	Field order encoding: set by libavcodec decoding: Set by libavcodec.
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.
FLAC options
Deprecated: Use FLAC encoder private options instead.
attribute_deprecated int	lpc_coeff_precision
	LPC coefficient precision - used by FLAC encoder encoding: Set by user.
attribute_deprecated int	prediction_order_method
	search method for selecting prediction order encoding: Set by user.
attribute_deprecated int	min_partition_order
	encoding: Set by user.
attribute_deprecated int	max_partition_order
	encoding: Set by user.

---

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*.

Definition at line 1381 of file avcodec.h.

---

Field Documentation

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 3170 of file avcodec.h.

Referenced by avcodec_close(), avcodec_decode_video2(), avcodec_flush_buffers(), avcodec_open2(), avcodec_thread_execute(), await_reference_mb_row(), decode_chunks(), decode_nal_units(), decode_slice_header(), ff_h263_decode_frame(), ff_rv34_decode_frame(), ff_thread_finish_setup(), ff_thread_free(), ff_thread_get_buffer(), ff_thread_init(), ff_thread_release_buffer(), field_end(), finish_frame(), frame_thread_init(), hl_motion(), mimic_decode_frame(), mpeg_field_start(), MPV_common_end(), MPV_common_init(), MPV_decode_mb_internal(), MPV_frame_start(), render_slice(), rv34_decode_mv(), rv34_decode_slice(), rv34_mc(), slice_end(), thread_init(), validate_thread_parameters(), video_get_buffer(), and vp3_draw_horiz_band().

attribute_deprecated int AVCodecContext::antialias_algo

MP3 antialias algorithm, see FF_AA_* below.

• encoding: unused
• decoding: Set by user.

Definition at line 2426 of file avcodec.h.

attribute_deprecated int AVCodecContext::aq_mode

AQ mode 0: Disabled 1: Variance AQ (complexity mask) 2: Auto-variance AQ (experimental)

• encoding: Set by user
• decoding: unused.

Definition at line 3049 of file avcodec.h.

Referenced by X264_init().

attribute_deprecated float AVCodecContext::aq_strength

AQ strength Reduces blocking and blurring in flat and textured areas.

• encoding: Set by user
• decoding: unused

Definition at line 3057 of file avcodec.h.

Referenced by X264_init().

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 3195 of file avcodec.h.

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

const AVClass* AVCodecContext::av_class

information on struct for av_log

• set by avcodec_alloc_context3

Definition at line 1386 of file avcodec.h.

Referenced by avcodec_get_context_defaults3().

int AVCodecContext::b_frame_strategy

Definition at line 1581 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), MPV_encode_init(), select_input_picture(), X264_init(), and XAVS_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 1575 of file avcodec.h.

Referenced by add_codec(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), get_diff_limited_q(), get_qminmax(), get_qscale(), 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 1708 of file avcodec.h.

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

int AVCodecContext::b_sensitivity

Adjust sensitivity of b_frame_strategy 1.

• encoding: Set by user.
• decoding: unused

Definition at line 2817 of file avcodec.h.

Referenced by select_input_picture().

attribute_deprecated int AVCodecContext::bframebias

Influence how often B-frames are used.

• encoding: Set by user.
• decoding: unused

Definition at line 2736 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

int AVCodecContext::bidir_refine

• encoding: Set by user.

• decoding: unused

Definition at line 2682 of file avcodec.h.

Referenced by bidir_refine().

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.

Definition at line 1392 of file avcodec.h.

Referenced by aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), add_audio_stream(), add_av_stream(), add_codec(), add_video_stream(), aea_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(), atrac3_decode_init(), audio_encode_example(), avformat_new_stream(), avi_write_header(), avisynth_read_header(), avpriv_adx_decode_header(), avpriv_dv_init_demux(), avpriv_dv_produce_packet(), bfi_read_header(), cin_read_header(), compute_bandwidth(), compute_status(), cook_decode_init(), daud_header(), dc1394_read_header(), dca_decode_frame(), decode_frame(), decode_ppc(), dv_extract_audio_info(), dv_extract_video_info(), dv_offset_reset(), ea_read_header(), encode_init(), estimate_timings_from_bit_rate(), Faac_encode_init(), fbdev_read_header(), ff_aac_ac3_parse(), ff_dnxhd_find_cid(), ff_parse_specific_params(), ff_wma_init(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), film_read_header(), find_stream_in_feed(), flic_read_header(), flv_write_header(), fourxm_read_header(), get_aiff_header(), get_audio_frame_size(), get_bit_rate(), get_sindex(), grab_read_header(), gsm_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), handle_file(), idcin_read_header(), iff_read_header(), init_bitstream_params(), ipmovie_read_header(), iss_read_header(), lame_window_init(), libdirac_encode_init(), libgsm_encode_init(), libschroedinger_encode_init(), lxf_read_header(), matroska_read_header(), mlp_parse(), mmf_read_header(), modify_current_stream(), mov_build_index(), mov_read_header(), mov_write_esds_tag(), mov_write_uuidprof_tag(), mp3_parse_vbr_tags(), MP3lame_encode_init(), MPA_encode_init(), mpeg_decode_postinit(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_read_header(), mpegvideo_extract_headers(), MPV_encode_init(), mtv_read_header(), mxf_write_d10_video_packet(), mxf_write_header(), mxf_write_mpegvideo_desc(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), optimum_dist(), optimum_use15_7(), parse_ffconfig(), parse_mpeg1waveformatex(), pcm_bluray_parse_header(), pcm_read_seek(), print_enc_params(), psy_3gpp_init(), psy_3gpp_window(), qcp_read_header(), qdm2_decode_init(), ra144_encode_init(), read_desc_chunk(), read_header(), real_parse_asm_rule(), rl2_read_header(), rm_read_header(), rm_write_header(), roq_read_packet(), rv10_write_header(), s302m_parse_frame_header(), search_for_quantizers_twoloop(), seq_read_header(), sipr_decoder_init(), sox_read_header(), tmv_read_header(), transcode_init(), twin_decode_frame(), twin_decode_init(), v4l2_read_header(), validate_options(), vid_read_header(), vid_read_packet(), video_encode_example(), vmd_read_header(), voc_get_packet(), vorbis_header(), vp8_init(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), wsaud_read_header(), wsvqa_read_header(), x11grab_read_header(), X264_init(), xa_read_header(), XAVS_init(), xmv_read_header(), and xwma_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 1400 of file avcodec.h.

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

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 2028 of file avcodec.h.

Referenced by adpcm_decode_init(), adpcm_encode_init(), aiff_write_header(), alac_encode_init(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), avi_read_header(), avisynth_read_header(), avs_read_packet(), bfi_read_header(), bmp_encode_frame(), bmp_encode_init(), cin_read_header(), cinepak_decode_init(), create_audio_stream(), daud_header(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_wave_header(), deplanarize(), dshow_add_device(), ea_read_header(), encode_init(), ff_cmap_read_palette(), ff_mov_read_stsd_entries(), ff_raw_read_header(), film_read_header(), flic_read_header(), flv_read_packet(), flv_set_audio_codec(), fourxm_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), get_packet_header(), get_sindex(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), ipvideo_decode_init(), iss_read_header(), mmf_read_header(), mov_get_rawvideo_codec_tag(), mov_write_video_tag(), mpc8_read_header(), mpc_read_header(), mpegps_read_packet(), msrle_decode_frame(), msrle_decode_init(), msvideo1_decode_init(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxg_read_header(), nsv_parse_NSVs_header(), nuv_header(), oma_read_header(), parse_media_type(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_encode_init(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_init(), raw_decode(), raw_init_decoder(), raw_init_encoder(), read_desc_chunk(), read_header(), read_packet(), rl2_read_header(), roq_read_packet(), rpl_read_header(), rtp_write_packet(), s302m_decode_frame(), s302m_parse_frame_header(), seq_read_header(), smacker_read_header(), smjpeg_read_header(), smka_decode_init(), sox_read_header(), tmv_read_header(), tta_decode_init(), tta_read_header(), update_context_from_thread(), vfw_read_header(), vid_read_header(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), voc_get_packet(), voc_write_packet(), wavpack_decode_init(), wc3_read_header(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), xa_read_header(), xmv_read_header(), 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 2917 of file avcodec.h.

Referenced by avpriv_flac_parse_streaminfo(), common_init(), decode_frame(), decode_init(), decode_plane(), decode_slice(), decode_slice_header(), dnxhd_decode_header(), dnxhd_encode_init(), dsputil_init(), dsputil_init_align(), dsputil_init_alpha(), dsputil_init_altivec(), dsputil_init_arm(), dsputil_init_bfin(), dsputil_init_mlib(), dsputil_init_mmi(), dsputil_init_mmx(), dsputil_init_ppc(), dsputil_init_sh4(), dsputil_init_vis(), dsputilenc_init_mmx(), encode_init(), ff_dsputil_init_armv5te(), ff_dsputil_init_armv6(), ff_dsputil_init_iwmmxt(), ff_dsputil_init_neon(), ff_h264_decode_init(), mlp_parse(), new_video_stream(), pcm_bluray_parse_header(), pcm_decode_init(), read_const_block_data(), read_extra_header(), read_header(), read_major_sync(), read_var_block_data(), transcode_init(), tta_decode_init(), update_context_from_thread(), utvideo_decode_init(), v410_decode_init(), vble_decode_init(), and y41p_decode_init().

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 1805 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(), atrac1_decode_frame(), atrac3_decode_frame(), atrac3_decode_init(), avformat_write_header(), avi_read_header(), avi_write_packet(), avisynth_read_header(), caf_write_header(), caf_write_packet(), caf_write_trailer(), cook_decode_frame(), cook_decode_init(), daud_header(), decode_init(), decode_packet(), dxa_read_header(), ea_read_header(), encode_init(), ff_mov_read_stsd_entries(), ff_parse_specific_params(), ff_raw_read_header(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_wma_init(), film_read_header(), flic_read_header(), fourxm_read_header(), g729_read_header(), g729_read_packet(), get_aiff_header(), get_nb_samples(), get_sindex(), gsm_decode_frame(), gsm_init(), handle_file(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), iss_read_header(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_frame(), libgsm_encode_init(), matroska_parse_block(), matroska_read_header(), mov_write_header(), mxf_write_d10_audio_packet(), mxf_write_wav_common(), mxg_read_header(), oma_read_header(), oma_read_packet(), oma_write_header(), pcm_encode_init(), pcm_read_seek(), ra288_decode_frame(), raw_read_packet(), read_desc_chunk(), read_header(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_packet(), seq_read_header(), sipr_decoder_init(), sox_read_header(), sox_read_packet(), str_read_packet(), transcode_init(), tta_decode_init(), vmd_read_header(), vmdaudio_decode_frame(), vmdaudio_decode_init(), wc3_read_header(), wmavoice_decode_init(), wmavoice_decode_packet(), xa_read_header(), xmv_read_header(), xwma_read_header(), and xwma_read_packet().

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 2633 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

int AVCodecContext::brd_scale

• encoding: Set by user.

• decoding: unused

Definition at line 2689 of file avcodec.h.

Referenced by estimate_best_b_count().

uint64_t AVCodecContext::channel_layout

Audio channel layout.

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

Definition at line 2924 of file avcodec.h.

Referenced by ac3_decode_frame(), aea_read_header(), aiff_write_header(), ape_decode_init(), apply_param_change(), audio_decode_frame(), avcodec_open2(), avcodec_string(), caf_write_header(), cdata_read_header(), cook_decode_init(), dca_decode_frame(), decode_frame(), decode_init(), do_audio_out(), dprint_options(), encode_init(), ff_aac_ac3_parse(), ff_alsa_open(), ff_flac_decode_frame_header(), ff_mov_read_chan(), flac_encode_init(), flic_read_header(), imc_decode_init(), lavfi_read_header(), mlp_parse(), mov_read_chan(), mov_read_dac3(), mov_write_chan_tag(), mpc7_decode_init(), mpc8_decode_init(), oggvorbis_init_encoder(), output_configure(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), read_major_sync(), read_restart_header(), s302m_parse_frame_header(), sbg_read_header(), smka_decode_init(), stream_component_open(), transcode_init(), tta_decode_init(), validate_options(), vorbis_decode_init(), wavpack_decode_block(), wavpack_decode_init(), and wv_read_header().

int AVCodecContext::channels

number of audio channels

Definition at line 1509 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_frame(), aacPlus_encode_init(), ac3_decode_frame(), ac3_decode_init(), add_audio_stream(), add_av_stream(), add_codec(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adx_decode_frame(), adx_decode_init(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), adx_read_packet(), aea_read_header(), aiff_write_header(), alac_decode_frame(), alac_decode_init(), alac_encode_frame(), alac_encode_init(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amr_wb_encode_init(), apc_read_header(), ape_decode_init(), ape_read_header(), apply_param_change(), apply_window_and_mdct(), atrac1_decode_init(), atrac3_decode_init(), au_read_header(), au_read_packet(), audio_decode_example(), audio_decode_frame(), audio_encode_example(), audio_get_buffer(), audio_read_header(), audio_write_header(), avcodec_decode_audio3(), avcodec_encode_audio(), avcodec_open2(), avcodec_string(), avformat_write_header(), avisynth_read_header(), avpriv_adx_decode_header(), avpriv_flac_parse_streaminfo(), bfi_read_header(), bmv_aud_decode_init(), bmv_read_header(), caf_write_header(), caf_write_trailer(), cdata_read_header(), celt_header(), cin_read_header(), cinaudio_decode_init(), compute_status(), construct_perm_table(), cook_decode_init(), create_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), dca_decode_init(), dec_gain(), decode_extension_payload(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decoder_init(), do_audio_out(), dpcm_decode_init(), dshow_add_device(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_audio_frame(), encode_frame(), encode_init(), Faac_encode_frame(), Faac_encode_init(), ff_aac_ac3_parse(), ff_ac3_validate_metadata(), ff_audio_interleave_init(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_psy_init(), ff_psy_preprocess_end(), ff_psy_preprocess_init(), ff_raw_read_header(), ff_rtp_get_codec_info(), ff_rtp_get_payload_type(), ff_wma_init(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_encode_init(), flic_read_header(), flush_encoders(), flv_read_packet(), flv_write_header(), fourxm_read_header(), g722_decode_init(), g722_encode_init(), g723_1_init(), g729_read_header(), get_aiff_header(), get_audio_flags(), get_audio_frame_size(), get_best_header(), get_bit_rate(), get_codec_data(), get_nb_samples(), get_sindex(), gsm_init(), gsm_read_header(), gxf_write_header(), handle_file(), has_codec_parameters(), idcin_read_header(), iff_read_header(), imc_decode_init(), imdct_output(), init_bitstream_params(), init_mdct_win(), init_sample_buffers(), ipmovie_read_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(), libspeex_decode_frame(), libspeex_decode_init(), lxf_read_header(), mace_decode_frame(), mace_decode_init(), matroska_read_header(), mkv_write_tracks(), mlp_parse(), mmf_read_header(), modplug_read_header(), mov_read_dac3(), mov_write_audio_tag(), mov_write_header(), mov_write_uuidprof_tag(), mp3_header_compress(), mp3_header_decompress(), 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(), mxf_get_d10_aes3_packet(), mxf_parse_structural_metadata(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxg_read_header(), new_audio_stream(), nsv_read_chunk(), nut_read_header(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), oma_write_header(), open_audio(), opt_map_channel(), opt_output_file(), output_configure(), output_data(), parse_ffconfig(), parse_mpeg1waveformatex(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), pcm_read_seek(), pmp_header(), print_enc_params(), psy_3gpp_init(), psy_3gpp_window(), pulse_read_header(), qcp_read_header(), qdm2_decode_init(), r3d_read_red1(), ra144_encode_init(), raw_read_packet(), read_and_decode_spectrum(), read_channel_data(), read_desc_chunk(), read_frame_data(), read_header(), read_major_sync(), read_packet(), read_restart_header(), read_specific_config(), revert_channel_correlation(), rl2_read_header(), rm_read_audio_stream_info(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_read_packet(), rso_read_header(), rso_write_header(), rtp_write_packet(), rv10_write_header(), s302m_decode_frame(), s302m_parse_frame_header(), sbg_read_header(), search_for_quantizers_twoloop(), seq_read_header(), show_stream(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smka_decode_frame(), smka_decode_init(), sol_read_header(), sox_read_header(), sox_write_header(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), thp_read_header(), tmv_read_header(), transcode_audio(), transcode_init(), truespeech_decode_init(), tta_decode_init(), tta_read_header(), twin_decode_init(), validate_options(), vid_read_header(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_frame(), vmdaudio_decode_init(), voc_get_packet(), voc_write_packet(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vorbis_parse_setup_hdr_residues(), vqf_read_header(), wavesynth_decode(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_init(), wc3_read_header(), wma_decode_init(), write_audio_frame(), write_compressed_frame(), write_frame_header(), write_streamheader(), ws_snd_decode_init(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_header(), wv_read_header(), wv_unpack_mono(), wv_unpack_stereo(), xa_read_header(), xa_read_packet(), xmv_read_header(), xwma_read_header(), and yop_read_header().

int AVCodecContext::chroma_elim_threshold

chroma single coeff elimination threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1682 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), MPV_encode_init(), and parse_ffconfig().

enum AVChromaLocation AVCodecContext::chroma_sample_location

This defines the location of chroma samples.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 3008 of file avcodec.h.

Referenced by decode_init(), decode_vui_parameters(), dvvideo_init(), ff_h263_decode_init(), ff_h264_decode_init(), ff_mjpeg_decode_init(), mpeg_decode_init(), transcode_init(), update_context_from_thread(), vp3_decode_init(), and yuv4_read_header().

int AVCodecContext::chromaoffset

chroma qp offset from luma

• encoding: Set by user.

• decoding: unused

Definition at line 2728 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

struct AVCodec* AVCodecContext::codec [read]

Definition at line 1583 of file avcodec.h.

Referenced by a64_write_header(), a64_write_packet(), a64multi_init_encoder(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), apply_param_change(), assert_codec_experimental(), audio_decode_frame(), avcodec_close(), avcodec_copy_context(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_audio2(), avcodec_encode_subtitle(), avcodec_encode_video(), avcodec_flush_buffers(), avcodec_open2(), avformat_find_stream_info(), close_connection(), codec_child_next(), common_end(), common_init(), config(), context_to_name(), copy_frame(), decode_end(), decode_frame(), decode_init(), decode_nal_units(), decode_slice_header(), do_video_out(), dpcm_decode_frame(), dpcm_decode_init(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_init(), execute_decode_slices(), ff_draw_horiz_band(), ff_er_frame_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_thread_flush(), ff_thread_get_buffer(), ff_thread_init(), ff_vdpau_mpeg4_decode_picture(), ff_vp56_init(), ff_wma_init(), field_end(), flush_encoders(), frame_thread_free(), frame_thread_init(), frame_worker_thread(), get_nb_samples(), h261_decode_init(), init(), mov_write_video_tag(), mpeg_decode_init(), MPV_encode_init(), MPV_frame_end(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), read_thread(), receive_frame(), show_stream(), submit_packet(), svq1_decode_init(), svq3_decode_init(), try_decode_frame(), update_context_from_thread(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), validate_thread_parameters(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vp56_add_predictors_dc(), vp56_decode_4mv(), vp6_decode_init(), wma_decode_init(), write_frame(), and xan_decode_frame().

enum CodecID AVCodecContext::codec_id

Definition at line 1629 of file avcodec.h.

Referenced by add_audio_stream(), add_av_stream(), add_input_streams(), add_video_stream(), adts_aac_read_header(), adx_read_header(), aea_read_header(), aiff_write_header(), amr_decode_fix_avctx(), amr_handle_packet(), amr_read_header(), amr_read_packet(), apc_read_header(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), au_read_header(), au_read_packet(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_read_packet(), avcodec_align_dimensions2(), avcodec_encode_audio(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avformat_write_header(), avi_read_header(), avi_write_header(), avi_write_trailer(), avisynth_read_header(), avpriv_dv_init_demux(), avpriv_mpa_decode_header(), avs_read_packet(), bfi_read_header(), bmv_read_header(), caf_write_header(), caf_write_trailer(), cdata_read_header(), celt_header(), choose_decoder(), choose_encoder(), choose_pixel_fmt(), cin_read_header(), commit_bitstream_and_slice_buffer(), compute_pkt_fields(), compute_status(), create_audio_stream(), create_stream(), cyuv_decode_frame(), daud_header(), dc1394_read_header(), decode_end(), decode_frame(), decode_init(), decode_mb(), decode_slice(), decode_stream_header(), dfa_read_header(), dirac_header(), do_streamcopy(), do_subtitle_out(), dshow_add_device(), dsputil_init_mmx(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), ea_read_header(), encode_frame(), encode_mb(), estimate_best_b_count(), extract_mpeg4_header(), fbdev_read_header(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_asf_parse_packet(), ff_audio_interleave_init(), ff_er_frame_end(), ff_h264_decode_init(), ff_init_me(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_mjpeg_encode_picture_header(), ff_mjpeg_find_marker(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ff_pnm_decode_header(), ff_psy_init(), ff_raw_audio_read_header(), ff_raw_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(), ffm_read_header(), ffm_write_header(), ffserver_opt_preset(), film_read_header(), find_expected_header(), find_stream_in_feed(), flac_header(), flac_read_header(), flic_read_header(), flv_read_packet(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), fourxm_read_header(), frame_worker_thread(), g723_1_init(), g729_read_header(), get_aiff_header(), get_attachment(), get_audio_flags(), get_audio_frame_size(), get_bit_rate(), get_codec_data(), get_packet_header(), get_sindex(), get_video_private_data(), 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(), has_codec_parameters(), has_decode_delay_been_guessed(), idcin_read_header(), iff_read_header(), imx_dump_header(), init_input_stream(), ipmovie_read_header(), ipod_get_codec_tag(), is_intra_more_likely(), is_intra_only(), iss_read_header(), ivf_write_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(), lxf_read_header(), lxf_read_packet(), m4sl_cb(), mace_decode_frame(), matroska_parse_block(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mjpeg_decode_scan(), mjpega_dump_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), modplug_read_header(), mov_find_codec_tag(), mov_get_codec_tag(), mov_read_enda(), mov_read_extradata(), mov_read_hdlr(), 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_packet_internal(), mov_write_uuidprof_tag(), mov_write_video_tag(), mov_write_wave_tag(), movie_common_init(), 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(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet(), mpegts_write_pes(), mpegts_write_pmt(), mpegvideo_extract_headers(), MPV_encode_init(), msnwc_tcp_read_header(), mtv_read_header(), mxf_handle_small_eubc(), mxf_parse_structural_metadata(), mxf_write_d10_audio_packet(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_packet(), mxg_read_header(), nc_read_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nut_read_header(), nuv_header(), ogg_buffer_data(), ogg_write_header(), ogg_write_packet(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), open_audio(), open_input_file(), open_video(), parse(), parse_ffconfig(), parse_fmtp(), parse_media_type(), parse_mpeg1waveformatex(), pcm_decode_frame(), pcm_read_seek(), pmp_header(), probe_file(), pulse_read_header(), put_xiph_codecpriv(), pva_read_header(), qcp_read_header(), qdm2_parse_packet(), r3d_read_red1(), raw_read_packet(), rdt_parse_packet(), rdt_parse_sdp_line(), read_access_unit(), read_desc_chunk(), read_ffserver_streams(), read_frame_internal(), read_header(), read_kuki_chunk(), read_major_sync(), read_matrix_params(), read_packet(), read_restart_header(), remove_extradata(), rl2_read_header(), rm_ac3_swap_bytes(), rm_read_audio_stream_info(), rm_write_audio(), roq_read_packet(), rpl_read_header(), rso_read_header(), rso_read_packet(), rso_write_header(), rtp_parse_packet_internal(), rtp_write_header(), rtp_write_packet(), rv10_decode_init(), rv10_write_header(), rv34_parse(), sbg_read_header(), sdl_write_header(), sdp_parse_fmtp_config_h264(), seek_frame_generic(), seq_read_header(), set_codec_from_probe_data(), setup_find_stream_info_opts(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), sol_read_header(), sox_read_header(), sox_write_header(), sox_write_trailer(), sp5x_decode_frame(), spdif_read_packet(), spdif_write_header(), speex_header(), srt_read_header(), str_read_packet(), stream_component_open(), svq3_parse_packet(), swf_read_packet(), swf_write_header(), swf_write_video(), tb_unreliable(), theora_header(), thp_read_header(), tmv_read_header(), transcode_init(), try_decode_frame(), tta_read_header(), txd_read_header(), v4l2_read_header(), vaapi_vc1_decode_slice(), validate_codec_tag(), vc1_decode_end(), vc1_decode_frame(), vc1_decode_init(), vc1_decode_init_alloc_tables(), vc1t_read_header(), vc1test_write_header(), vcr2_init_sequence(), vfw_read_header(), vid_read_header(), vmd_read_header(), voc_get_packet(), vorbis_header(), vqf_read_header(), wc3_read_header(), write_header(), write_stream_codec_info(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), yop_read_header(), and yuv4_read_header().

char AVCodecContext::codec_name[32]

Definition at line 1627 of file avcodec.h.

Referenced by asf_write_header1(), ff_mov_read_stsd_entries(), rm_read_audio_stream_info(), and skeleton_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.

Definition at line 1644 of file avcodec.h.

Referenced by a64multi_init_encoder(), add_input_streams(), aiff_write_header(), amr_read_header(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), au_read_header(), avcodec_string(), avformat_write_header(), avi_read_header(), avi_write_header(), avisynth_read_header(), avpriv_dv_frame_profile2(), cdata_read_header(), cin_read_header(), daud_header(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_stream_header(), dpcm_decode_frame(), dpcm_decode_init(), ea_read_header(), ff_mjpeg_decode_sos(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_parse_mpeg2_descriptor(), ff_rm_read_mdpr_codecdata(), ffm_read_header(), ffm_write_header(), film_read_header(), flic_read_header(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aiff_header(), get_audio_flags(), get_codec_data(), handle_file(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), ipod_get_codec_tag(), ivf_write_header(), lxf_read_header(), matroska_read_header(), mkv_write_codecprivate(), mkv_write_tracks(), mov_find_codec_tag(), mov_get_codec_tag(), mov_get_rawvideo_codec_tag(), mov_read_header(), mov_write_hdlr_tag(), mov_write_ms_tag(), mov_write_stbl_tag(), mov_write_stsd_tag(), mp4_get_codec_tag(), mpeg_decode_frame(), mpegts_set_stream_info(), MPV_common_init(), msnwc_tcp_read_header(), new_output_stream(), nsv_parse_NSVs_header(), nut_read_header(), ogm_header(), oma_read_header(), oma_write_header(), parse_ffconfig(), pmt_cb(), prores_encode_init(), raw_decode(), raw_encode(), raw_init_decoder(), raw_init_encoder(), read_desc_chunk(), read_header(), rl2_read_header(), rm_read_audio_stream_info(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rso_read_header(), rso_write_header(), rv10_write_header(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), sol_read_header(), str_read_packet(), thp_read_header(), transcode_init(), utvideo_decode_init(), v4l2_read_header(), validate_codec_tag(), vc1_decode_init(), vmd_read_header(), voc_write_packet(), vp3_decode_init(), wc3_read_header(), write_streamheader(), wsvqa_read_header(), xmv_read_header(), xsub_encoder_init(), and xwma_read_header().

enum AVMediaType AVCodecContext::codec_type

Definition at line 1628 of file avcodec.h.

Referenced by add_audio_stream(), add_av_stream(), add_codec(), add_dstream(), add_input_streams(), adts_aac_read_header(), adx_read_header(), aea_read_header(), amr_read_header(), apc_read_header(), ape_read_header(), asf_read_header(), asf_read_stream_properties(), asf_write_header1(), asf_write_packet(), au_read_header(), audio_read_header(), av_find_best_stream(), av_find_default_stream_index(), av_interleave_packet_per_dts(), av_interleaved_write_frame(), av_read_packet(), avcodec_default_free_buffers(), avcodec_default_get_buffer(), avcodec_default_reget_buffer(), avcodec_default_release_buffer(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avformat_write_header(), 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_read_header(), avpriv_dv_init_demux(), avs_read_packet(), bfi_read_header(), bmv_read_header(), build_feed_streams(), build_frame_code(), cdata_read_header(), celt_header(), check_stream_specifier(), choose_decoder(), choose_encoder(), cin_read_header(), compute_bandwidth(), compute_frame_duration(), compute_pkt_fields2(), compute_status(), create_audio_stream(), create_stream(), daud_header(), dc1394_read_header(), decode_stream_header(), dfa_read_header(), dirac_header(), do_streamcopy(), do_video_stats(), dshow_add_device(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_init_mux(), dxa_read_header(), ea_read_header(), fbdev_read_header(), ff_asf_parse_packet(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_interleave_compare_dts(), ff_mov_init_hinting(), ff_mov_read_stsd_entries(), ff_parse_mpeg2_descriptor(), ff_parse_specific_params(), ff_raw_audio_read_header(), ff_raw_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(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_header(), flac_read_header(), flic_read_header(), flush_encoders(), flv_read_metabody(), flv_write_header(), flv_write_packet(), flv_write_trailer(), fourxm_read_header(), g723_1_init(), g729_read_header(), get_aiff_header(), get_attachment(), get_bit_rate(), get_decoded_frame(), get_sindex(), gif_write_header(), gif_write_packet(), 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(), http_prepare_data(), idcin_read_header(), iff_read_header(), iff_read_packet(), ipmovie_read_header(), ipod_get_codec_tag(), is_intra_only(), iss_read_header(), ivf_write_header(), lavfi_read_header(), lmlm4_read_header(), loas_read_header(), lxf_read_header(), m4sl_cb(), matroska_read_header(), microdvd_read_header(), mkv_write_attachments(), mkv_write_codecprivate(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), modplug_read_header(), mov_build_index(), mov_create_chapter_track(), mov_get_codec_tag(), mov_read_hdlr(), mov_read_trak(), mov_read_trun(), mov_write_esds_tag(), mov_write_ftyp_tag(), mov_write_hdlr_tag(), mov_write_header(), mov_write_iods_tag(), mov_write_minf_tag(), mov_write_packet_internal(), mov_write_stbl_tag(), mov_write_stsd_tag(), mov_write_stts_tag(), mov_write_tfhd_tag(), mov_write_tkhd_tag(), mov_write_trak_tag(), mp3_read_header(), mp4_get_codec_tag(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet(), mpegts_write_pes(), mpegts_write_pmt(), msnwc_tcp_read_header(), mtv_read_header(), mxf_handle_small_eubc(), mxf_parse_structural_metadata(), mxf_read_packet(), mxf_read_packet_old(), 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(), nsv_parse_NSVs_header(), nut_read_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_stream(), opt_map_channel(), opt_output_file(), opt_target(), output_packet(), parse_ffconfig(), pmp_header(), pmt_cb(), print_report(), pulse_read_header(), pva_read_header(), qcp_read_header(), qt_rtp_parse_packet(), r3d_read_red1(), read_desc_chunk(), read_ffserver_streams(), read_header(), read_packet(), 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(), rso_read_header(), rtp_write_header(), rv10_write_header(), sbg_read_header(), sdl_write_header(), seg_write_header(), seg_write_packet(), 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(), sol_read_header(), sox_read_header(), spdif_read_packet(), speex_header(), srt_read_header(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), theora_header(), thp_read_header(), tmv_read_header(), transcode(), transcode_init(), try_decode_frame(), tta_read_header(), txd_read_header(), update_stream_timings(), v4l2_read_header(), vc1t_read_header(), vfw_read_header(), vid_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), vorbis_header(), vqf_read_header(), wc3_read_header(), write_frame(), write_header(), write_stream_codec(), write_stream_codec_info(), write_stream_data(), write_streamheader(), write_timestamp(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), yop_read_header(), and yuv4_read_header().

AVFrame* AVCodecContext::coded_frame

the picture in the bitstream

• encoding: Set by libavcodec.

• decoding: Set by libavcodec.

Definition at line 2054 of file avcodec.h.

Referenced by a64multi_init_encoder(), aac_decode_init(), aac_encode_close(), aac_encode_init(), aacPlus_encode_close(), aacPlus_encode_init(), ac3_decode_init(), adpcm_decode_init(), adpcm_encode_close(), adpcm_encode_init(), adx_decode_init(), adx_encode_close(), adx_encode_init(), alac_decode_init(), alac_encode_close(), alac_encode_init(), amr_wb_encode_close(), amr_wb_encode_init(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), atrac1_decode_init(), atrac3_decode_init(), avcodec_close(), bmp_decode_init(), bmp_encode_init(), bmv_aud_decode_init(), cinaudio_decode_init(), common_init(), cook_decode_init(), dca_decode_init(), decode_close(), decode_frame(), decode_init(), decode_init_thread_copy(), decode_slice(), decode_slice_thread(), decoder_init(), dnxhd_decode_init(), dnxhd_encode_init(), do_video_out(), do_video_stats(), dpcm_decode_init(), dvvideo_init(), eightsvx_decode_init(), encode_close(), encode_frame(), encode_init(), encode_init_ls(), Faac_encode_close(), Faac_encode_init(), ff_ac3_encode_close(), ff_ac3_encode_init(), ff_pnm_init(), filter(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flashsv2_encode_frame(), flashsv_encode_frame(), flush_encoders(), g722_decode_init(), g723_1_decode_init(), gif_decode_init(), gif_encode_init(), gsm_init(), imc_decode_init(), j2kdec_init(), libcelt_dec_init(), libdirac_encode_frame(), libdirac_encode_init(), libgsm_decode_init(), libgsm_encode_close(), libgsm_encode_init(), libopenjpeg_decode_init(), libopenjpeg_decode_init_thread_copy(), libopenjpeg_encode_close(), libopenjpeg_encode_init(), libschroedinger_encode_frame(), libschroedinger_encode_init(), libspeex_decode_init(), mace_decode_init(), mdec_common_init(), mlp_decode_init(), MP3lame_encode_close(), MP3lame_encode_init(), MPA_encode_close(), MPA_encode_init(), mpc7_decode_init(), mpc8_decode_init(), MPV_common_init(), MPV_frame_end(), oggvorbis_encode_close(), oggvorbis_encode_frame(), oggvorbis_encode_init(), pcm_bluray_decode_init(), pcm_decode_init(), pcm_encode_close(), pcm_encode_init(), pcx_encode_init(), pcx_init(), png_enc_init(), print_report(), prores_encode_close(), prores_encode_init(), ptx_init(), qcelp_decode_init(), qdm2_decode_init(), qtrle_encode_init(), ra144_decode_init(), ra288_decode_init(), raw_decode(), raw_init_decoder(), raw_init_encoder(), roq_dpcm_encode_close(), roq_dpcm_encode_init(), roq_encode_video(), s302m_decode_init(), sgi_init(), shorten_decode_init(), sipr_decoder_init(), smka_decode_init(), sunrast_init(), svq1_encode_init(), targa_encode_init(), targa_init(), tiff_init(), truespeech_decode_init(), tta_decode_init(), twin_decode_init(), txd_init(), ulti_decode_init(), update_context_from_thread(), utvideo_decode_close(), utvideo_decode_frame(), utvideo_decode_init(), v308_decode_close(), v308_decode_frame(), v308_decode_init(), v308_encode_close(), v308_encode_frame(), v308_encode_init(), v410_decode_close(), v410_decode_frame(), v410_decode_init(), v410_encode_close(), v410_encode_frame(), v410_encode_init(), v4l2_read_packet(), vble_decode_close(), vble_decode_frame(), vble_decode_init(), vble_restore_plane(), vmdaudio_decode_init(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_frame(), vorbis_encode_init(), vp8_encode(), vp8_free(), vp8_init(), wavesynth_init(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), write_audio_frame(), write_video_frame(), ws_snd_decode_init(), X264_init(), XAVS_init(), xwd_decode_close(), xwd_decode_frame(), xwd_decode_init(), xwd_encode_close(), xwd_encode_frame(), xwd_encode_init(), y41p_decode_close(), y41p_decode_frame(), y41p_decode_init(), y41p_encode_close(), y41p_encode_frame(), y41p_encode_init(), yuv4_decode_close(), yuv4_decode_frame(), yuv4_decode_init(), yuv4_encode_close(), yuv4_encode_frame(), yuv4_encode_init(), and yuv4_read_packet().

int AVCodecContext::coded_height

Definition at line 2597 of file avcodec.h.

Referenced by av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_open2(), avcodec_set_dimensions(), avpriv_dv_codec_profile(), decode_slice_header(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_mpeg_update_thread_context(), h261_decode_frame(), h261_decode_init(), mdec_common_init(), mpeg_decode_postinit(), mpegvideo_extract_headers(), rv10_decode_init(), 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(), vp56_size_changed(), vp5_parse_header(), and vp6_parse_header().

int AVCodecContext::coded_width

Bitstream width / height, may be different from width/height if lowres enabled.

• encoding: unused
• decoding: Set by user before init if known. Codec should override / dynamically change if needed.

Definition at line 2597 of file avcodec.h.

Referenced by av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_open2(), avcodec_set_dimensions(), avpriv_dv_codec_profile(), decode_slice_header(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mpeg_update_thread_context(), h261_decode_frame(), h261_decode_init(), mdec_common_init(), mpeg_decode_postinit(), mpegvideo_extract_headers(), rv10_decode_init(), 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(), vp56_size_changed(), vp5_parse_header(), and vp6_parse_header().

int AVCodecContext::coder_type

coder type

• encoding: Set by user.

• decoding: unused

Definition at line 2274 of file avcodec.h.

Referenced by encode_frame(), ffm_read_header(), ffm_write_header(), libdirac_encode_init(), libschroedinger_encode_init(), read_extra_header(), read_header(), targa_encode_frame(), and X264_init().

enum AVColorPrimaries AVCodecContext::color_primaries

Chromaticity coordinates of the source primaries.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2980 of file avcodec.h.

Referenced by decode_slice_header(), encode_init(), libschroedinger_encode_init(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), and update_context_from_thread().

enum AVColorRange AVCodecContext::color_range

MPEG vs JPEG YUV range.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 3001 of file avcodec.h.

Referenced by decode_slice_header(), ff_mjpeg_decode_sof(), mpeg_decode_init(), parse_source_parameters(), and update_context_from_thread().

int AVCodecContext::color_table_id

color table ID

• encoding: unused
• decoding: Which clrtable should be used for 8bit RGB images.

Tables have to be stored somewhere. FIXME

Definition at line 2238 of file avcodec.h.

Referenced by ff_mov_read_stsd_entries().

enum AVColorTransferCharacteristic AVCodecContext::color_trc

Color Transfer Characteristic.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2987 of file avcodec.h.

Referenced by decode_slice_header(), libschroedinger_encode_init(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), and update_context_from_thread().

enum AVColorSpace AVCodecContext::colorspace

YUV colorspace type.

• encoding: Set by user
• decoding: Set by libavcodec

Definition at line 2994 of file avcodec.h.

Referenced by decode_slice_header(), libschroedinger_encode_init(), mpeg_decode_sequence_display_extension(), parse_source_parameters(), and update_context_from_thread().

attribute_deprecated float AVCodecContext::complexityblur

Reduce fluctuations in qp (before curve compression).

• encoding: Set by user.
• decoding: unused

Definition at line 2752 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

int AVCodecContext::compression_level

• encoding: Set by user.

• decoding: unused

Definition at line 2823 of file avcodec.h.

Referenced by alac_encode_init(), config(), encode_frame(), encode_init(), flac_encode_init(), flashsv2_encode_init(), libopenjpeg_encode_init(), MP3lame_encode_init(), and print_enc_params().

int AVCodecContext::context_model

context model

• encoding: Set by user.

• decoding: unused

Definition at line 2281 of file avcodec.h.

attribute_deprecated int AVCodecContext::cqp

constant quantization parameter rate control method

• encoding: Set by user.

• decoding: unused

  Deprecated:

  use 'cqp' libx264 private option

Definition at line 2706 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

attribute_deprecated float AVCodecContext::crf

constant rate factor - quality-based VBR - values ~correspond to qps

• encoding: Set by user.

• decoding: unused

  Deprecated:

  use 'crf' libx264 private option

Definition at line 2698 of file avcodec.h.

Referenced by vp8_init(), X264_init(), and XAVS_init().

attribute_deprecated float AVCodecContext::crf_max

Constant rate factor maximum With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse than crf_max, even if doing so would violate VBV restrictions.

• encoding: Set by user.
• decoding: unused

Definition at line 3090 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::cutoff

Audio cutoff bandwidth (0 means "automatic")

• encoding: Set by user.

• decoding: unused

Definition at line 2795 of file avcodec.h.

Referenced by aacPlus_encode_init(), Faac_encode_init(), ff_psy_preprocess_init(), oggvorbis_init_encoder(), psy_3gpp_init(), and validate_options().

float AVCodecContext::dark_masking

darkness masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1957 of file avcodec.h.

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

int AVCodecContext::dct_algo

DCT algorithm, see FF_DCT_* below

• encoding: Set by user.

• decoding: unused

Definition at line 1915 of file avcodec.h.

Referenced by dsputil_init(), dsputil_init_bfin(), dsputil_init_ppc(), dsputilenc_init_mmx(), ffm_read_header(), ffm_write_header(), MPV_common_init_altivec(), MPV_common_init_mlib(), MPV_common_init_mmx(), and parse_ffconfig().

attribute_deprecated int AVCodecContext::deblockalpha

in-loop deblocking filter alphac0 parameter alpha is in the range -6.

..6

• encoding: Set by user.
• decoding: unused

Definition at line 2760 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

attribute_deprecated int AVCodecContext::deblockbeta

in-loop deblocking filter beta parameter beta is in the range -6.

..6

• encoding: Set by user.
• decoding: unused

Definition at line 2768 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

int AVCodecContext::debug

debug

• encoding: Set by user.

• decoding: Set by user.

Definition at line 2061 of file avcodec.h.

Referenced by audio_get_buffer(), avcodec_default_release_buffer(), decode_chunks(), decode_codestream(), decode_ext_header(), decode_frame(), decode_init(), decode_nal_units(), decode_picture_timing(), decode_slice_header(), decode_unregistered_user_data(), decode_vol_header(), decode_vop_header(), ff_alloc_picture(), ff_er_frame_end(), ff_flv_decode_picture_header(), ff_h263_decode_frame(), ff_h263_show_pict_info(), ff_h264_decode_picture_parameter_set(), ff_h264_decode_sei(), ff_h264_decode_seq_parameter_set(), ff_h264_execute_ref_pic_marking(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sos(), ff_mpeg4_decode_picture_header(), ff_print_debug_info(), 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(), ffm_read_header(), ffm_write_header(), find_short(), frame_thread_init(), libdirac_decode_init(), libdirac_encode_init(), 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(), msmpeg4_decode_picture_header(), parse_ffconfig(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), predict_slice(), predict_slice_buffered(), print_long_term(), print_short_term(), remove_short(), rv10_decode_init(), rv20_decode_picture_header(), svq3_decode_frame(), transcode(), transcode_init(), truemotion1_decode_header(), update_context_from_user(), and video_get_buffer().

int AVCodecContext::debug_mv

debug

• encoding: Set by user.

• decoding: Set by user.

Definition at line 2085 of file avcodec.h.

Referenced by ff_alloc_picture(), ff_print_debug_info(), frame_thread_init(), and update_context_from_user().

int AVCodecContext::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.

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

Definition at line 1533 of file avcodec.h.

Referenced by MPV_encode_init(), and update_context_from_thread().

int AVCodecContext::dia_size

ME diamond size & shape

• encoding: Set by user.

• decoding: unused

Definition at line 2143 of file avcodec.h.

Referenced by config(), estimate_motion_thread(), ff_init_me(), and svq1_encode_plane().

attribute_deprecated int AVCodecContext::directpred

direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)

• encoding: Set by user.

• decoding: unused

Definition at line 2787 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), X264_init(), and XAVS_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

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

attribute_deprecated float AVCodecContext::drc_scale

Percentage of dynamic range compression to be applied by the decoder.

The default value is 1.0, corresponding to full compression.

• encoding: unused
• decoding: Set by user.

  Deprecated:

  use AC3 decoder private option instead.

Definition at line 2900 of file avcodec.h.

Referenced by ac3_decode_init().

unsigned AVCodecContext::dsp_mask

dsp_mask could be add used to disable unwanted CPU features CPU features (i.e.

MMX, SSE. ...)

With the FORCE flag you may instead enable given CPU features. (Dangerous: Usable in case of misdetection, improper usage however will result into program crash.)

Definition at line 2021 of file avcodec.h.

Referenced by dsputil_init_mmx(), dsputil_init_ppc(), ff_dsputil_init_iwmmxt(), main(), and update_context_from_user().

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 2199 of file avcodec.h.

Referenced by mpeg_decode_user_data(), and update_context_from_thread().

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 3210 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_frame(), avcodec_open2(), decode_chunks(), decode_frame(), decode_init(), decode_slice(), decode_slice_header(), execute_decode_slices(), ff_h263_decode_frame(), ff_h264_execute_ref_pic_marking(), ff_mjpeg_decode_frame(), h261_decode_gob_header(), mjpegb_decode_frame(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_frame(), mpeg_decode_slice(), MPV_frame_start(), mxpeg_decode_frame(), read_specific_config(), slice_decode_thread(), tta_decode_frame(), and tta_decode_init().

uint64_t AVCodecContext::error[AV_NUM_DATA_POINTERS]

error

• encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.

• decoding: unused

Definition at line 2095 of file avcodec.h.

Referenced by estimate_best_b_count(), MPV_encode_picture(), and print_report().

int AVCodecContext::error_concealment

error concealment flags

• encoding: unused
• decoding: Set by user.

Definition at line 2009 of file avcodec.h.

Referenced by ff_er_frame_end(), guess_mv(), and stream_component_open().

int AVCodecContext::error_rate

Simulates errors in the bitstream to test error concealment.

• encoding: Set by user.
• decoding: unused

Definition at line 2418 of file avcodec.h.

Referenced by encode_thread().

attribute_deprecated int AVCodecContext::error_recognition

Error recognition; higher values will detect more errors but may misdetect some more or less valid parts as errors.

• encoding: unused
• decoding: Set by user.

Definition at line 1717 of file avcodec.h.

Referenced by avcodec_open2(), and mpeg4_decode_mb().

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.

Referenced by avcodec_get_context_defaults3(), decode_chunks(), decode_component(), decode_frame(), decode_lowdelay(), decode_picture(), encode_picture(), execute_decode_slices(), and thread_init().

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.

Referenced by avcodec_get_context_defaults3(), decode_picture(), dnxhd_encode_fast(), dnxhd_encode_picture(), dnxhd_encode_rdo(), dnxhd_find_qscale(), and thread_init().

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 prolems 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 1439 of file avcodec.h.

Referenced by a64_write_header(), a64_write_packet(), a64multi_encode_frame(), a64multi_init_encoder(), aac_adtstoasc_filter(), aac_decode_frame(), aac_decode_init(), aac_encode_init(), aacPlus_encode_close(), aacPlus_encode_init(), add_av_stream1(), adpcm_decode_init(), adpcm_encode_init(), adts_write_header(), adx_decode_init(), adx_read_header(), aiff_read_header(), alac_encode_close(), alac_encode_init(), alac_set_info(), alloc_buffers(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_mpeg4_decode_header(), av_parser_change(), avcodec_close(), avcodec_copy_context(), avformat_find_stream_info(), avformat_free_context(), avi_read_header(), avisynth_read_header(), avpriv_flac_is_extradata_valid(), bfi_decode_frame(), bfi_read_header(), caf_write_header(), celt_header(), concatenate_packet(), cook_decode_init(), decode_audio_specific_config(), decode_chunks(), decode_ext_header(), decode_header_trees(), decode_init(), decode_stream_header(), dshow_add_device(), dump_attachment(), dump_extradata(), dvbsub_init_decoder(), dvdsub_init(), encode_close(), encode_end(), encode_ext_header(), encode_init(), encode_intervals(), extract_header(), extract_mpeg4_header(), Faac_encode_close(), Faac_encode_init(), ff_cmap_read_palette(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ffm_read_header(), ffm_write_header(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flac_header(), flac_read_header(), flic_decode_init(), flic_read_header(), flv_get_extradata(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_attachment(), get_codec_data(), get_private_data(), get_video_private_data(), h264_mp4toannexb_filter(), h264_parse(), idcin_decode_init(), idcin_read_header(), iff_read_header(), init(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_write_frame_header(), latm_write_header(), libcelt_dec_init(), libspeex_decode_init(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mov_read_extradata(), mov_read_glbl(), mov_read_smi(), mov_read_strf(), mov_read_wave(), mov_write_extradata_tag(), mov_write_header(), mov_write_packet_internal(), mov_write_subtitle_tag(), mp3_header_compress(), mp3_header_decompress(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_decode_frame(), mpegts_write_header(), mpegts_write_pmt(), MPV_encode_end(), mtv_read_header(), mxf_parse_structural_metadata(), new_stream(), nut_read_header(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_encode_close(), oggvorbis_encode_init(), oma_read_header(), oma_write_header(), opt_output_file(), parse_fmtp_config(), parse_media_type(), parse_mpeg1waveformatex(), parse_packed_headers(), put_audio_specific_config(), 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(), rl2_decode_init(), rl2_read_header(), rm_read_extradata(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), sdp_parse_fmtp_config_h264(), smacker_read_header(), speex_header(), Stagefright_close(), Stagefright_init(), svq3_decode_init(), svq3_parse_packet(), theora_header(), transcode(), transcode_init(), tta_decode_init(), tta_read_header(), twin_decode_init(), uninit(), utvideo_decode_init(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_init(), vorbis_header(), vp6_parse_header(), vqa_decode_init(), vqf_read_header(), wavesynth_parse_extradata(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_header(), write_streamheader(), write_trailer(), wsvqa_read_header(), X264_close(), X264_init(), XAVS_close(), XAVS_init(), xmv_process_packet_header(), xwma_read_header(), yop_decode_init(), and yop_read_header().

int AVCodecContext::extradata_size

Definition at line 1440 of file avcodec.h.

Referenced by a64multi_init_encoder(), aac_adtstoasc_filter(), aac_decode_frame(), aac_decode_init(), aac_encode_init(), aacPlus_encode_init(), add_av_stream1(), adpcm_decode_init(), adpcm_encode_init(), adts_write_header(), adx_decode_init(), adx_read_header(), aiff_read_header(), alac_decode_init(), alac_encode_close(), alac_encode_init(), apc_read_header(), ape_decode_init(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), av_mpeg4_decode_header(), av_parser_change(), avcodec_copy_context(), avcodec_open2(), avformat_find_stream_info(), avi_read_header(), avisynth_read_header(), avpriv_flac_is_extradata_valid(), bfi_decode_frame(), bfi_read_header(), caf_write_header(), celt_header(), concatenate_packet(), cook_decode_init(), decode_audio_specific_config(), decode_ext_header(), decode_header_trees(), decode_init(), decode_stream_header(), dshow_add_device(), dump_attachment(), dump_extradata(), dvbsub_init_decoder(), dvdsub_init(), encode_close(), encode_ext_header(), encode_init(), encode_intervals(), extract_header(), extract_mpeg4_header(), Faac_encode_init(), ff_cmap_read_palette(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_mjpeg_decode_init(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ff_rtp_send_aac(), ff_rtp_send_latm(), ffm_read_header(), ffm_write_header(), flac_encode_close(), flac_encode_init(), flac_header(), flac_read_header(), flic_decode_init(), flic_read_header(), flv_get_extradata(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), fourxm_read_header(), get_aac_sample_rates(), get_attachment(), get_codec_data(), get_private_data(), get_video_private_data(), h264_mp4toannexb_filter(), h264_parse(), idcin_decode_init(), idcin_read_header(), iff_read_header(), init(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_decode_init(), latm_write_frame_header(), latm_write_header(), libcelt_dec_init(), libspeex_decode_init(), m4sl_cb(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_codecprivate(), mov_read_extradata(), mov_read_glbl(), mov_read_smi(), mov_read_strf(), mov_read_wave(), mov_write_extradata_tag(), mov_write_header(), mov_write_packet_internal(), mov_write_subtitle_tag(), mp3_header_compress(), mp3_header_decompress(), mp_decode_init(), mpc7_decode_init(), mpc8_decode_init(), mpc8_read_header(), mpc_read_header(), mpeg_decode_frame(), mpegts_write_header(), mpegts_write_pmt(), mtv_read_header(), mxf_parse_structural_metadata(), new_stream(), nut_read_header(), ogg_build_speex_headers(), ogg_write_header(), oggvorbis_encode_init(), oma_read_header(), oma_write_header(), opt_output_file(), parse_fmtp_config(), parse_media_type(), parse_packed_headers(), put_audio_specific_config(), put_xiph_codecpriv(), qdm2_decode_init(), qdm2_parse_config(), raw_init_decoder(), read_extra_header(), read_header(), read_kuki_chunk(), read_packet(), read_specific_config(), rl2_decode_init(), rl2_read_header(), rm_read_audio_stream_info(), rm_read_extradata(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), sdp_parse_fmtp_config_h264(), smacker_read_header(), speex_header(), Stagefright_close(), Stagefright_decode_frame(), Stagefright_init(), svq3_decode_init(), svq3_parse_packet(), theora_header(), transcode_init(), tta_decode_init(), tta_read_header(), twin_decode_init(), uninit(), utvideo_decode_init(), vc1_decode_init(), vc1t_read_header(), vfw_read_header(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vorbis_header(), vp6_parse_header(), vqa_decode_init(), vqf_read_header(), wavesynth_parse_extradata(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_header(), write_streamheader(), write_trailer(), wsvqa_read_header(), X264_init(), XAVS_init(), xmv_process_packet_header(), xwma_read_header(), and yop_read_header().

enum AVFieldOrder AVCodecContext::field_order

Field order

• encoding: set by libavcodec
• decoding: Set by libavcodec.

Definition at line 3232 of file avcodec.h.

Referenced by ff_mjpeg_decode_init(), mov_read_fiel(), mov_write_fiel_tag(), mov_write_video_tag(), and transcode_init().

int AVCodecContext::flags

CODEC_FLAG_*.

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

Definition at line 1407 of file avcodec.h.

Referenced by aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_init(), add_audio_stream(), add_input_streams(), add_video_stream(), alloc_buffer(), amv_encode_picture(), av_parser_change(), avcodec_string(), avformat_write_header(), common_init(), comp_block(), config(), dct_get(), decode_frame(), decode_init(), decode_slice_thread(), dirac_decode_init(), dnxhd_decode_macroblock(), dnxhd_encode_init(), do_video_out(), do_video_stats(), dsputil_init_mmx(), dsputilenc_init_mmx(), dv_guess_dct_mode(), encode_block(), encode_frame(), encode_init(), encode_slice_data(), estimate_best_b_count(), Faac_encode_init(), ff_ac3_encode_init(), ff_dnxhd_find_cid(), ff_fmt_convert_init_altivec(), ff_fmt_convert_init_arm(), ff_fmt_convert_init_x86(), ff_h263_decode_frame(), ff_mjpeg_decode_init(), ff_proresdsp_x86_init(), ff_rv34_decode_init(), ff_snow_frame_start(), ffm_read_header(), ffm_write_header(), flac_write_header(), float_init_altivec(), get_flags(), h261_decode_frame(), idct_put(), intra_predict(), lame_window_init(), libdirac_encode_init(), libschroedinger_encode_init(), load_input_picture(), mjpeg_decode_scan(), mkv_write_header(), mov_write_udta_tag(), MP3lame_encode_init(), mpeg_decode_init(), MPV_common_init(), MPV_encode_init(), mxf_write_header(), mxf_write_identification(), new_output_stream(), new_video_stream(), ogg_write_header(), oggvorbis_init_encoder(), parse_ffconfig(), print_report(), remove_extradata(), render_slice(), rv10_decode_frame(), stream_component_open(), svq1_decode_init(), svq1_encode_plane(), svq3_decode_init(), tgq_idct_put_mb(), tgq_idct_put_mb_dconly(), tqi_idct_put(), transcode_init(), unpack_dct_coeffs(), update_context_from_user(), validate_thread_parameters(), vble_decode_frame(), vc1_decode_init(), video_decode_example(), video_get_buffer(), vorbis_encode_init(), vp8_decode_frame(), vp8_encode(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::flags2

CODEC_FLAG2_*

• encoding: Set by user.

• decoding: Set by user.

Definition at line 2411 of file avcodec.h.

Referenced by av_parser_change(), config(), decode_frame(), decode_slice_header(), dump_extradata(), encode_bgra_bitstream(), encode_init(), ff_h263_decode_frame(), ff_h264_decode_nal(), ff_mov_read_stsd_entries(), ffm_read_header(), ffm_write_header(), h261_decode_frame(), MP3lame_encode_init(), mpeg_decode_init(), MPV_common_init(), MPV_encode_init(), parse_timecode_in_framenum_format(), remove_extradata(), rv10_decode_frame(), stream_component_open(), svq3_decode_init(), update_context_from_user(), validate_thread_parameters(), X264_init(), and XAVS_init().

int AVCodecContext::frame_bits

number of bits used for the previously encoded frame

• encoding: Set by libavcodec.

• decoding: unused

Definition at line 1618 of file avcodec.h.

Referenced by aac_encode_frame(), and MPV_encode_picture().

int AVCodecContext::frame_number

audio or video frame number

Definition at line 1523 of file avcodec.h.

Referenced by aac_encode_frame(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), avcodec_encode_subtitle(), avcodec_encode_video(), avcodec_open2(), bfi_decode_frame(), decode_frame(), decode_packet(), do_streamcopy(), eightsvx_decode_frame(), ff_eac3_output_frame_header(), flashsv2_encode_frame(), flashsv_encode_frame(), h261_decode_frame(), http_prepare_data(), mpeg_decode_frame(), optimum_use15_7(), qtrle_encode_frame(), rv10_decode_frame(), svq1_encode_end(), svq1_encode_frame(), svq3_decode_frame(), update_context_from_user(), and warn_insufficient_frame_quality().

int AVCodecContext::frame_size

Samples per packet, initialized when calling 'init'.

Definition at line 1522 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_frame(), aacPlus_encode_init(), adpcm_encode_init(), adx_encode_init(), aiff_read_header(), alac_encode_frame(), alac_encode_init(), alac_entropy_coder(), alac_linear_predictor(), alac_stereo_decorrelation(), amr_decode_fix_avctx(), amr_read_header(), amr_wb_encode_init(), ape_read_header(), asf_read_stream_properties(), audio_encode_example(), avcodec_encode_audio(), avcodec_encode_audio2(), calc_predictor_params(), celt_header(), create_audio_stream(), dca_decode_frame(), decode_init(), decoder_init(), do_audio_out(), dprint_compression_options(), encode_frame(), encode_init(), encode_superframe(), Faac_encode_frame(), Faac_encode_init(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_mov_read_stsd_entries(), ff_parse_specific_params(), ff_psy_preprocess(), ffm_read_header(), ffm_write_header(), flac_encode_frame(), flac_encode_init(), flac_parse(), flush_encoders(), g722_encode_init(), get_aiff_header(), get_audio_frame_size(), get_best_header(), gsm_decode_frame(), gsm_init(), has_codec_parameters(), init_frame(), init_sample_buffers(), libcelt_dec_decode(), libcelt_dec_init(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_init(), libspeex_decode_init(), mlp_parse(), mov_read_trak(), mov_write_audio_tag(), mov_write_header(), mov_write_packet_internal(), mov_write_tfhd_tag(), MP3lame_encode_frame(), MP3lame_encode_init(), mp_decode_frame(), MPA_encode_init(), mpegaudio_parse(), mpegts_write_header(), oggvorbis_encode_frame(), oggvorbis_encode_init(), open_audio(), output_packet(), pcm_encode_init(), print_enc_params(), ra144_encode_init(), rdt_parse_sdp_line(), read_header(), read_major_sync(), rm_write_header(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), rtp_write_header(), rv10_write_header(), sbg_read_header(), sbg_read_packet(), swf_write_audio(), swf_write_header(), transcode_init(), vorbis_decode_init(), vorbis_encode_frame(), vorbis_encode_init(), write_compressed_frame(), and write_frame_header().

int AVCodecContext::frame_skip_cmp

frame skip comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 2625 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), and MPV_encode_init().

int AVCodecContext::frame_skip_exp

frame skip exponent

• encoding: Set by user.

• decoding: unused

Definition at line 2618 of file avcodec.h.

Referenced by skip_check().

int AVCodecContext::frame_skip_factor

frame skip factor

• encoding: Set by user.

• decoding: unused

Definition at line 2611 of file avcodec.h.

Referenced by select_input_picture(), and skip_check().

int AVCodecContext::frame_skip_threshold

frame skip threshold

• encoding: Set by user.

• decoding: unused

Definition at line 2604 of file avcodec.h.

Referenced by select_input_picture(), skip_check(), and vp8_init().

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.

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.

Referenced by aac_decode_frame_int(), ac3_decode_frame(), adpcm_decode_frame(), adx_decode_frame(), alac_decode_frame(), amrnb_decode_frame(), amrwb_decode_frame(), ape_decode_frame(), atrac1_decode_frame(), atrac3_decode_frame(), aura_decode_frame(), avcodec_decode_audio3(), avcodec_default_reget_buffer(), avcodec_get_context_defaults3(), bfi_decode_frame(), bmp_decode_frame(), bmv_aud_decode_frame(), cdg_decode_frame(), cinaudio_decode_frame(), cmv_decode_frame(), cook_decode_frame(), copy_frame(), cyuv_decode_frame(), dca_decode_frame(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_pic(), decode_tag(), dfa_decode_frame(), dirac_decode_data_unit(), dirac_decode_picture_header(), dpcm_decode_frame(), eightsvx_decode_frame(), escape124_decode_frame(), escape130_decode_frame(), execute_code(), ff_ivi_decode_frame(), ff_mjpeg_decode_sof(), ff_snow_frame_start(), ff_thread_get_buffer(), ff_vp56_decode_frame(), flac_decode_frame(), frame_worker_thread(), g722_decode_frame(), g723_1_decode_frame(), get_siz(), gif_decode_frame(), gsm_decode_frame(), idcin_decode_frame(), imc_decode_frame(), init_image(), init_input_stream(), ipvideo_decode_frame(), lag_decode_frame(), libcelt_dec_decode(), libgsm_decode_frame(), libspeex_decode_frame(), mace_decode_frame(), mca(), mp_decode_frame(), mpc7_decode_frame(), mpc8_decode_frame(), mxpeg_decode_frame(), output_data(), pcm_bluray_decode_frame(), pcm_decode_frame(), pcx_decode_frame(), pnm_decode_frame(), ptx_decode_frame(), qcelp_decode_frame(), qdm2_decode_frame(), ra144_decode_frame(), ra288_decode_frame(), rl2_decode_frame(), roq_encode_frame(), s302m_decode_frame(), shorten_decode_frame(), sipr_decode_frame(), smka_decode_frame(), submit_packet(), sunrast_decode_frame(), svq1_encode_frame(), synth_superframe(), tgq_decode_frame(), tmv_decode_frame(), tqi_decode_frame(), truespeech_decode_frame(), tta_decode_frame(), twin_decode_frame(), txd_decode_frame(), update_context_from_user(), v308_decode_frame(), v410_decode_frame(), vble_decode_frame(), vmdaudio_decode_frame(), vmdvideo_decode_frame(), vorbis_decode_frame(), vqa_decode_frame(), wavesynth_decode(), wavpack_decode_frame(), wma_decode_superframe(), ws_snd_decode_frame(), xan_decode_frame(), xwd_decode_frame(), y41p_decode_frame(), yop_decode_frame(), and yuv4_decode_frame().

enum PixelFormat(* AVCodecContext::get_format)(struct AVCodecContext *s, const enum PixelFormat *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.

Referenced by avcodec_get_context_defaults3(), decode_init(), decode_slice_header(), ff_h263_decode_init(), mpeg_get_pixelformat(), and vc1_decode_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 2262 of file avcodec.h.

Referenced by a64multi_init_encoder(), aac_encode_init(), config(), encode_init(), Faac_encode_init(), lame_window_init(), libdirac_encode_init(), libschroedinger_encode_init(), MP3lame_encode_init(), new_output_stream(), oggvorbis_init_encoder(), optimum_use15_7(), parse_ffconfig(), transcode_video(), and vorbis_encode_init().

int AVCodecContext::gop_size

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

• encoding: Set by user.

• decoding: unused

Definition at line 1469 of file avcodec.h.

Referenced by add_av_stream(), add_video_stream(), config(), encode_init(), ffm_read_header(), ffm_write_header(), flashsv2_encode_frame(), flashsv_encode_frame(), libdirac_encode_init(), libschroedinger_encode_init(), MPV_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(), vp8_init(), X264_init(), and XAVS_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 1799 of file avcodec.h.

Referenced by avcodec_decode_video2(), compute_pkt_fields(), compute_pkt_fields2(), decode(), decode_nal_units(), decode_postinit(), decode_stream_header(), dirac_combine_frame(), ff_h263_decode_frame(), ff_h264_decode_init(), ff_h264_execute_ref_pic_marking(), ff_mpeg4_decode_picture_header(), ff_rv34_decode_init(), flush(), h264_parse(), init_input_stream(), libdirac_decode_frame(), libdirac_encode_init(), libschroedinger_decode_frame(), libschroedinger_encode_init(), mov_build_index(), mpeg_decode_postinit(), mpegvideo_extract_headers(), MPV_encode_init(), mxf_get_mpeg2_codec_ul(), nut_read_header(), receive_frame(), rv10_decode_init(), show_stream(), svq1_decode_init(), svq3_decode_init(), transcode_init(), update_context_from_thread(), update_initial_durations(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), write_streamheader(), X264_init(), and XAVS_init().

int AVCodecContext::header_bits

Definition at line 1605 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::height

Definition at line 1460 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_video_stream(), alloc_buffer(), alloc_picture(), apply_param_change(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_default_reget_buffer(), avcodec_encode_video(), avcodec_open2(), avcodec_set_dimensions(), avcodec_string(), avformat_write_header(), avi_read_header(), avi_write_header(), avisynth_read_header(), avpriv_dv_frame_profile2(), avs_read_packet(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bmp_decode_frame(), bmp_encode_frame(), bmv_read_header(), cdg_decode_init(), cin_read_header(), cinepak_decode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_get_buffer(), codec_reinit(), common_init(), compute_status(), config(), CustomSource::CustomSource(), cyuv_decode_init(), dc1394_read_header(), decode_13(), decode_frame(), decode_frame_byterun1(), decode_frame_header(), decode_frame_ilbm(), decode_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_block(), decode_p_frame(), decode_picture_header(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_stream_header(), dfa_decode_frame(), dfa_decode_init(), dfa_read_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_get_blocks(), dnxhd_write_header(), do_streamcopy(), do_video_resample(), do_video_stats(), draw_char(), dshow_add_device(), dump_stream_format(), dv_write_pack(), dvvideo_init_encoder(), dxa_read_header(), ea_read_header(), encode_frame(), 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(), execute_code(), fbdev_read_header(), ff_create_schro_frame(), ff_dirac_schro_get_video_format_idx(), ff_dnxhd_find_cid(), ff_draw_horiz_band(), ff_dxva2_common_end_frame(), ff_init_buffer_info(), ff_mov_read_stsd_entries(), ff_mpeg_update_thread_context(), ff_pnm_decode_header(), ff_print_debug_info(), ff_raw_read_header(), ff_rm_read_mdpr_codecdata(), ff_rv34_decode_init(), ff_sauce_read(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_frame_start(), ff_thread_decode_frame(), ff_vaapi_common_end_frame(), ff_vdpau_h264_picture_complete(), ff_vdpau_mpeg4_decode_picture(), ff_vdpau_mpeg_picture_complete(), ff_vdpau_vc1_decode_picture(), ffm_read_header(), ffm_write_header(), fill_picture_parameters(), film_read_header(), find_stream_in_feed(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_read_header(), flip(), fourxm_read_header(), get_logical_cpus(), get_siz(), gif_encode_init(), gif_image_write_header(), gif_image_write_image(), gif_write_header(), gif_write_video(), grab_read_header(), gxf_find_lines_index(), gxf_write_header(), gxf_write_mpeg_auxiliary(), halfpel_interpol(), handle_file(), hscroll(), idcin_decode_vlcs(), idcin_read_header(), iff_read_header(), init(), init_bundles(), init_filters(), init_image(), init_slice_contexts(), ipmovie_read_header(), ipvideo_decode_frame(), ipvideo_decode_opcodes(), ir2_decode_frame(), ivf_write_header(), j2kenc_init(), lag_decode_frame(), lavfi_read_header(), libdirac_decode_frame(), libdirac_encode_frame(), libdirac_encode_init(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libopenjpeg_encode_frame(), libschroedinger_decode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), matroska_read_header(), mca(), mimic_decode_frame(), mj2_create_image(), mkv_write_tracks(), mm_decode_inter(), mm_decode_intra(), modplug_read_header(), mov_get_dv_codec_tag(), mov_read_trak(), mov_write_avid_tag(), mov_write_header(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_read_changes_map(), mpegvideo_extract_headers(), MPV_encode_init(), MPV_frame_start(), msrle_decode_8_16_24_32(), msrle_decode_frame(), msrle_decode_pal4(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_video(), opt_output_file(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_picture_segment(), parse_presentation_segment(), pcx_decode_frame(), pcx_encode_frame(), pmp_header(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), pre_process_video_frame(), prepare_avpic(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), ptx_decode_frame(), 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(), queue_picture(), r3d_read_red1(), raw_decode(), raw_encode(), raw_init_decoder(), rawvideo_read_packet(), read_header(), read_packet(), read_seek(), receive_frame(), 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(), sdl_write_header(), sdl_write_packet(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), smjpeg_write_header(), sp5x_decode_frame(), Stagefright_decode_frame(), Stagefright_init(), str_read_packet(), sunrast_decode_frame(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_init(), swf_write_header(), swf_write_video(), targa_encode_frame(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), theora_header(), thp_read_header(), tiff_decode_tag(), tm2_decode_blocks(), tm2_motion_block(), tmv_decode_frame(), tmv_read_header(), to_meta_with_crop(), tqi_decode_frame(), transcode_init(), transcode_video(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), utvideo_decode_frame(), utvideo_decode_init(), v308_decode_frame(), v308_encode_frame(), v410_decode_frame(), v410_encode_frame(), v4l2_read_header(), vb_decode_framedata(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_header(), vid_read_packet(), video_decode_example(), video_encode_example(), video_get_buffer(), video_open(), video_thread(), vmd_decode(), vp3_decode_init(), vp3_draw_horiz_band(), vp6_parse_header(), vp8_decode(), vp8_init(), wc3_read_header(), write_streamheader(), write_trailer(), write_video_frame(), 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(), xiph_parse_fmtp_pair(), xmv_read_header(), xwd_decode_frame(), xwd_encode_frame(), y41p_decode_frame(), y41p_encode_frame(), yop_decode_frame(), yop_decode_init(), yop_read_header(), yuv4_decode_frame(), yuv4_encode_frame(), yuv4_read_header(), yuv4_read_packet(), and zmbv_me().

struct AVHWAccel* AVCodecContext::hwaccel [read]

Hardware accelerator in use

• encoding: unused.

• decoding: Set by libavcodec

Definition at line 2952 of file avcodec.h.

Referenced by alloc_frame_buffer(), avcodec_copy_context(), decode_nal_units(), decode_slice(), decode_slice_header(), execute_decode_slices(), ff_draw_horiz_band(), ff_er_add_slice(), ff_er_frame_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_print_debug_info(), field_end(), get_consumed_bytes(), mpeg_decode_slice(), mpeg_field_start(), MPV_frame_end(), slice_end(), vc1_decode_frame(), vc1_decode_init(), and vcr2_init_sequence().

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 2973 of file avcodec.h.

Referenced by commit_bitstream_and_slice_buffer(), decode_slice(), end_frame(), ff_dxva2_common_end_frame(), ff_vaapi_common_end_frame(), fill_slice_long(), start_frame(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), and vaapi_vc1_start_frame().

int AVCodecContext::i_count

Definition at line 1608 of file avcodec.h.

Referenced by MPV_encode_picture().

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 1894 of file avcodec.h.

Referenced by add_codec(), 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 1901 of file avcodec.h.

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

int AVCodecContext::i_tex_bits

Definition at line 1606 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::idct_algo

IDCT algorithm, see FF_IDCT_* below.

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

Definition at line 1964 of file avcodec.h.

Referenced by calc_intra_matrix(), decode_init(), decode_pic(), dsputil_init(), dsputil_init_alpha(), dsputil_init_arm(), dsputil_init_bfin(), dsputil_init_mmi(), dsputil_init_mmx(), dsputil_init_ppc(), dsputil_init_sh4(), dsputil_init_vis(), ff_dsputil_init_armv5te(), ff_dsputil_init_armv6(), ff_dsputil_init_neon(), ff_h263_decode_frame(), ff_vp56_init(), MPV_common_init_mlib(), parse_ffconfig(), render_slice(), stream_component_open(), tgq_calculate_qtable(), tgq_decode_init(), tqi_calculate_qtable(), tqi_decode_init(), update_context_from_thread(), vc1_decode_init(), vcr2_init_sequence(), vp3_decode_init(), and wmv2_decode_init().

int AVCodecContext::ildct_cmp

interlaced DCT comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 2120 of file avcodec.h.

Referenced by dvvideo_init(), encode_mb_internal(), and MPV_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 2330 of file avcodec.h.

Referenced by avcodec_copy_context(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), MPV_encode_init(), and new_video_stream().

int AVCodecContext::inter_quant_bias

inter quantizer bias

• encoding: Set by user.

• decoding: unused

Definition at line 2230 of file avcodec.h.

Referenced by MPV_encode_init().

int AVCodecContext::inter_threshold

• encoding: Set by user.

• decoding: unused

Definition at line 2404 of file avcodec.h.

struct AVCodecInternal* AVCodecContext::internal [read]

Private context used for internal data.

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

Definition at line 3226 of file avcodec.h.

Referenced by audio_free_buffers(), audio_get_buffer(), avcodec_close(), avcodec_copy_context(), avcodec_default_release_buffer(), avcodec_encode_audio(), avcodec_is_open(), avcodec_open2(), decode_init_thread_copy(), ff_rv34_decode_init_thread_copy(), frame_thread_free(), frame_thread_init(), mimic_decode_end(), MPV_common_end(), video_free_buffers(), video_get_buffer(), vp3_decode_end(), and vp8_decode_flush_impl().

attribute_deprecated void* AVCodecContext::internal_buffer

internal_buffers Don't touch, used by libavcodec default_get_buffer().

Deprecated:

this field was moved to an internal context

Definition at line 2253 of file avcodec.h.

attribute_deprecated int AVCodecContext::internal_buffer_count

internal_buffer count Don't touch, used by libavcodec default_get_buffer().

Deprecated:

this field was moved to an internal context

Definition at line 2246 of file avcodec.h.

int AVCodecContext::intra_dc_precision

precision of the intra DC coefficient - 8

• encoding: Set by user.

• decoding: unused

Definition at line 2488 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), MPV_encode_init(), and new_video_stream().

uint16_t* AVCodecContext::intra_matrix

custom intra quantization matrix

• encoding: Set by user, can be NULL.

• decoding: Set by libavcodec.

Definition at line 2323 of file avcodec.h.

Referenced by avcodec_copy_context(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), MPV_encode_init(), and new_video_stream().

int AVCodecContext::intra_quant_bias

intra quantizer bias

• encoding: Set by user.

• decoding: unused

Definition at line 2222 of file avcodec.h.

Referenced by dnxhd_encode_init(), and MPV_encode_init().

attribute_deprecated int AVCodecContext::is_copy

Whether this is a copy of the context which had init() called on it.

This is used by multithreading - shared tables and picture pointers should be freed from the original context only.

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

Deprecated:

this field has been moved to an internal context

Definition at line 3150 of file avcodec.h.

int AVCodecContext::keyint_min

minimum GOP size

• encoding: Set by user.

• decoding: unused

Definition at line 2714 of file avcodec.h.

Referenced by encode_frame(), encode_init(), ffm_read_header(), ffm_write_header(), flashsv2_encode_frame(), vp8_init(), X264_init(), and XAVS_init().

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 2150 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::level

level

• encoding: Set by user.

• decoding: Set by libavcodec.

Definition at line 2582 of file avcodec.h.

Referenced by avpriv_dirac_parse_sequence_header(), decode_slice_header(), encode_init(), 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().

int AVCodecContext::lmax

maximum Lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 2360 of file avcodec.h.

Referenced by get_qminmax(), and MPV_encode_picture().

int AVCodecContext::lmin

minimum Lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 2353 of file avcodec.h.

Referenced by get_qminmax().

int AVCodecContext::log_level_offset

Definition at line 3093 of file avcodec.h.

int AVCodecContext::lowres

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

• encoding: unused
• decoding: Set by user.

Definition at line 2590 of file avcodec.h.

Referenced by add_input_streams(), avcodec_align_dimensions2(), avcodec_open2(), avcodec_set_dimensions(), chroma_4mv_motion_lowres(), decode_slice(), dsputil_init(), dsputil_init_alpha(), dsputil_init_arm(), dsputil_init_mmx(), dsputil_init_ppc(), dv_decode_video_segment(), dvvideo_init(), ff_dsputil_init_armv5te(), ff_dsputil_init_armv6(), ff_dsputil_init_neon(), ff_er_frame_end(), ff_h263_decode_picture_header(), ff_init_block_index(), ff_intel_h263_decode_picture_header(), ff_mjpeg_decode_sof(), ff_update_block_index(), hpel_motion_lowres(), libopenjpeg_decode_frame(), mjpeg_decode_scan(), mjpeg_decode_scan_progressive_ac(), mpeg_decode_slice(), mpeg_motion_lowres(), MPV_decode_mb(), MPV_decode_mb_internal(), MPV_motion_lowres(), rv20_decode_picture_header(), and stream_component_open().

attribute_deprecated int AVCodecContext::lpc_coeff_precision

LPC coefficient precision - used by FLAC encoder

• encoding: Set by user.

• decoding: unused

Definition at line 2850 of file avcodec.h.

Referenced by flac_encode_init().

attribute_deprecated int AVCodecContext::lpc_passes

Number of passes to use for Cholesky factorization during LPC analysis

• encoding: Set by user
• decoding: unused.

Definition at line 3108 of file avcodec.h.

Referenced by flac_encode_init().

attribute_deprecated enum AVLPCType AVCodecContext::lpc_type

Determine which LPC analysis algorithm to use.

• encoding: Set by user
• decoding: unused

Definition at line 3101 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::luma_elim_threshold

luma single coefficient elimination threshold

• encoding: Set by user.

• decoding: unused

Definition at line 1675 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), MPV_encode_init(), and parse_ffconfig().

float AVCodecContext::lumi_masking

luminance masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1929 of file avcodec.h.

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

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

Definition at line 1566 of file avcodec.h.

Referenced by add_video_stream(), compute_pkt_fields2(), config(), decode_sequence_header_adv(), estimate_best_b_count(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), vaapi_vc1_start_frame(), vc1_decode_init(), vc1_decode_sequence_header(), vc1_parse_frame_header(), video_encode_example(), X264_init(), and XAVS_init().

attribute_deprecated int AVCodecContext::max_partition_order

• encoding: Set by user.

• decoding: unused

Definition at line 2869 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::max_prediction_order

• encoding: Set by user.

• decoding: unused

Definition at line 2836 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

int AVCodecContext::max_qdiff

maximum quantizer difference between frames

• encoding: Set by user.

• decoding: unused

Definition at line 1558 of file avcodec.h.

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

int AVCodecContext::mb_cmp

macroblock comparison function (not supported yet)

• encoding: Set by user.

• decoding: unused

Definition at line 2114 of file avcodec.h.

Referenced by check_bidir_mv(), config(), direct_search(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), h263_mv4_search(), interlaced_search(), and sse_mb().

int AVCodecContext::mb_decision

macroblock decision mode

• encoding: Set by user.

• decoding: unused

Definition at line 2313 of file avcodec.h.

Referenced by add_video_stream(), avcodec_string(), 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(), ffm_read_header(), ffm_write_header(), MPV_decode_mb_internal(), MPV_encode_init(), and parse_ffconfig().

int AVCodecContext::mb_lmax

maximum MB lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 2647 of file avcodec.h.

Referenced by adaptive_quantization().

int AVCodecContext::mb_lmin

minimum MB lagrange multipler

• encoding: Set by user.

• decoding: unused

Definition at line 2640 of file avcodec.h.

Referenced by adaptive_quantization().

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 2481 of file avcodec.h.

Referenced by ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), MPV_encode_init(), and vp8_init().

int AVCodecContext::me_cmp

motion estimation comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 2102 of file avcodec.h.

Referenced by config(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), ffm_read_header(), ffm_write_header(), filter(), hpel_motion_search(), qpel_motion_search(), X264_init(), and XAVS_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 1426 of file avcodec.h.

Referenced by add_codec(), config(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), svq1_encode_plane(), X264_init(), and XAVS_init().

int AVCodecContext::me_penalty_compensation

• encoding: Set by user.

• decoding: unused

Definition at line 2654 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 2164 of file avcodec.h.

Referenced by ff_init_me(), and ff_pre_estimate_p_frame_motion().

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 2215 of file avcodec.h.

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

int AVCodecContext::me_sub_cmp

subpixel motion estimation comparison function

• encoding: Set by user.

• decoding: unused

Definition at line 2108 of file avcodec.h.

Referenced by config(), direct_search(), estimate_best_b_count(), ff_estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), filter(), hpel_motion_search(), and qpel_motion_search().

int AVCodecContext::me_subpel_quality

subpel ME quality

• encoding: Set by user.

• decoding: unused

Definition at line 2178 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), qpel_motion_search(), 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 2474 of file avcodec.h.

Referenced by copy_picture_attributes(), do_video_out(), encode_picture(), ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), MPV_encode_init(), and transcode_init().

attribute_deprecated int AVCodecContext::min_partition_order

• encoding: Set by user.

• decoding: unused

Definition at line 2863 of file avcodec.h.

Referenced by flac_encode_init().

int AVCodecContext::min_prediction_order

• encoding: Set by user.

• decoding: unused

Definition at line 2830 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

int AVCodecContext::misc_bits

Definition at line 1611 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::mpeg_quant

0-> h263 quant 1-> mpeg quant

• encoding: Set by user.

• decoding: unused

Definition at line 1822 of file avcodec.h.

Referenced by ffm_read_header(), ffm_write_header(), and MPV_encode_init().

int AVCodecContext::mv0_threshold

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

• encoding: Set by user.
• decoding: unused

Definition at line 2810 of file avcodec.h.

Referenced by epzs_motion_search_internal().

int AVCodecContext::mv_bits

Definition at line 1604 of file avcodec.h.

Referenced by MPV_encode_picture().

int AVCodecContext::noise_reduction

noise reduction strength

• encoding: Set by user.

• decoding: unused

Definition at line 2376 of file avcodec.h.

Referenced by init_duplicate_context(), merge_context_after_encode(), MPV_common_init(), MPV_frame_start(), update_noise_reduction(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::nsse_weight

noise vs.

sse weight for the nsse comparsion function

• encoding: Set by user.
• decoding: unused

Definition at line 2495 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), nsse16_c(), nsse16_mmx(), nsse8_c(), and nsse8_mmx().

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 1625 of file avcodec.h.

Referenced by codec_get_buffer(), codec_release_buffer(), init_input_stream(), and update_context_from_user().

int AVCodecContext::p_count

Definition at line 1609 of file avcodec.h.

Referenced by MPV_encode_picture().

float AVCodecContext::p_masking

p block masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1950 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

int AVCodecContext::p_tex_bits

Definition at line 1607 of file avcodec.h.

Referenced by MPV_encode_picture().

struct AVPaletteControl* AVCodecContext::palctrl [read]

palette control structure

• encoding: ??? (no palette-enabled encoder yet)
• decoding: Set by user.

Definition at line 2368 of file avcodec.h.

Referenced by nsv_read_close().

attribute_deprecated int AVCodecContext::parse_only

If true, only parsing is done.

The frame data is returned. Only MPEG audio decoders support this now.

• encoding: unused
• decoding: Set by user

Definition at line 1814 of file avcodec.h.

attribute_deprecated int AVCodecContext::partitions

macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4

• encoding: Set by user.

• decoding: unused

Definition at line 2775 of file avcodec.h.

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

enum PixelFormat AVCodecContext::pix_fmt

Pixel format, see PIX_FMT_xxx.

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

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

Definition at line 1478 of file avcodec.h.

Referenced by aasc_decode_init(), add_video_stream(), alloc_buffer(), alloc_picture(), aura_decode_init(), avcodec_align_dimensions(), avcodec_align_dimensions2(), avcodec_decode_video2(), avcodec_default_reget_buffer(), avcodec_get_context_defaults3(), avcodec_string(), avpriv_dv_codec_profile(), avs_decode_init(), bethsoftvid_decode_init(), bfi_decode_init(), bfi_read_header(), bmp_decode_frame(), bmp_encode_frame(), bmp_encode_init(), bmv_read_header(), cdg_decode_init(), choose_pixel_fmt(), cinepak_decode_init(), cinvideo_decode_init(), cmv_decode_init(), codec_get_buffer(), config(), copy_frame(), cyuv_decode_init(), dc1394_read_header(), decode_frame(), decode_frame_byterun1(), decode_frame_header(), decode_frame_ilbm(), decode_init(), decode_plane(), decode_slice_header(), decode_slice_thread(), decode_tile(), dfa_decode_init(), dirac_decode_data_unit(), dnxhd_decode_header(), dnxhd_encode_init(), do_streamcopy(), do_video_resample(), dshow_add_device(), dvvideo_init_encoder(), encode_frame(), encode_init(), encode_init_ls(), encode_picture_lossless(), encode_picture_ls(), encode_rgb48_10bit(), escape124_decode_init(), escape130_decode_init(), estimate_best_b_count(), extract_header(), fbdev_read_header(), ff_cavs_init(), ff_create_schro_frame(), ff_draw_horiz_band(), ff_h263_decode_init(), ff_init_buffer_info(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sof(), ff_mjpeg_decode_sos(), ff_mjpeg_encode_picture_header(), ff_pnm_decode_header(), ff_print_debug_info(), ff_raw_read_header(), ff_rv34_decode_init(), ff_thread_decode_frame(), ff_vp56_init(), ffm_read_header(), ffm_write_header(), film_read_header(), flashsv_decode_init(), flic_decode_frame(), flic_decode_init(), get_siz(), gif_decode_frame(), gif_write_header(), grab_read_header(), gxf_write_header(), gxf_write_mpeg_auxiliary(), gxf_write_umf_media_mpeg(), h261_decode_init(), has_codec_parameters(), idcin_decode_init(), init(), init_decoder(), init_filters(), init_image(), ipvideo_decode_init(), ir2_decode_init(), j2kenc_init(), jpeg_put_comments(), lag_decode_frame(), lag_pred_line(), lavfi_read_header(), libdirac_decode_frame(), libdirac_encode_frame(), libdirac_encode_init(), libopenjpeg_decode_frame(), libopenjpeg_encode_frame(), libschroedinger_decode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), load_input_picture(), mimic_decode_frame(), mj2_create_image(), mm_decode_init(), mov_get_dv_codec_tag(), mov_get_rawvideo_codec_tag(), mp_decode_init(), MPV_common_init(), MPV_encode_init(), MPV_frame_end(), msrle_decode_init(), msvideo1_decode_8bit(), msvideo1_decode_init(), mtv_read_header(), mxf_parse_structural_metadata(), new_video_stream(), open_video(), pam_encode_frame(), parse_h264_sdp_line(), parse_source_parameters(), pcx_decode_frame(), pcx_encode_frame(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), pre_process_video_frame(), prores_encode_init(), ptx_decode_frame(), put_cod(), qtrle_decode_init(), qtrle_encode_frame(), qtrle_encode_init(), qtrle_encode_line(), raw_decode(), raw_encode(), raw_init_decoder(), raw_init_encoder(), rawvideo_read_packet(), read_header(), rl2_decode_init(), roq_decode_frame(), roq_decode_init(), rpza_decode_init(), rv10_decode_init(), sdl_write_header(), sdl_write_packet(), seqvideo_decode_init(), SetSchroChromaFormat(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_init(), Stagefright_decode_frame(), Stagefright_init(), sunrast_decode_frame(), svq1_decode_init(), svq1_encode_frame(), svq3_decode_init(), targa_encode_frame(), tgq_decode_init(), tgv_decode_init(), tiff_unpack_strip(), tmv_decode_init(), tmv_read_header(), tqi_decode_init(), transcode_init(), transcode_video(), truemotion1_decode_header(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), uses_vdpau(), utvideo_decode_frame(), utvideo_decode_init(), v308_decode_init(), v410_decode_init(), v4l2_read_header(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vfw_read_header(), vid_read_header(), video_encode_example(), video_get_buffer(), vmdvideo_decode_init(), vp3_decode_init(), vp8_decode_init(), vp8_init(), vqa_decode_init(), write_header(), write_video_frame(), x11grab_read_header(), X264_frame(), X264_init(), xan_decode_init(), xiph_parse_fmtp_pair(), xwd_decode_frame(), xwd_encode_frame(), y41p_decode_init(), yop_decode_init(), yuv4_decode_init(), yuv4_read_header(), and yuv4_read_packet().

AVPacket* AVCodecContext::pkt

Current packet as passed into the decoder, to avoid having to pass the packet into every function.

Currently only valid inside lavc and get/release_buffer callbacks.

• decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
• encoding: unused

Definition at line 3138 of file avcodec.h.

Referenced by audio_get_buffer(), avcodec_decode_audio4(), avcodec_decode_subtitle2(), avcodec_decode_video2(), codec_get_buffer(), decode(), ff_init_buffer_info(), frame_thread_init(), raw_decode(), and video_get_buffer().

int AVCodecContext::pre_dia_size

ME prepass diamond size & shape

• encoding: Set by user.

• decoding: unused

Definition at line 2171 of file avcodec.h.

Referenced by ff_init_me(), and pre_estimate_motion_thread().

int AVCodecContext::pre_me

prepass for motion estimation

• encoding: Set by user.

• decoding: unused

Definition at line 2157 of file avcodec.h.

Referenced by encode_picture().

int AVCodecContext::prediction_method

prediction method (needed for huffyuv)

• encoding: Set by user.

• decoding: unused

Definition at line 2035 of file avcodec.h.

Referenced by encode_picture_lossless(), encode_picture_ls(), ff_mjpeg_encode_picture_header(), and png_enc_init().

attribute_deprecated int AVCodecContext::prediction_order_method

search method for selecting prediction order

• encoding: Set by user.

• decoding: unused

Definition at line 2857 of file avcodec.h.

Referenced by flac_encode_init().

void* AVCodecContext::priv_data

Definition at line 1585 of file avcodec.h.

Referenced by a64multi_close_encoder(), a64multi_encode_frame(), a64multi_init_encoder(), aac_decode_close(), aac_decode_frame(), aac_decode_frame_int(), aac_decode_init(), aac_encode_close(), aac_encode_end(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_close(), aacPlus_encode_frame(), aacPlus_encode_init(), aasc_decode_end(), aasc_decode_frame(), aasc_decode_init(), ac3_decode_end(), ac3_decode_frame(), ac3_decode_init(), ac3_fixed_encode_init(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_close(), adpcm_encode_init(), adx_decode_flush(), adx_decode_frame(), adx_decode_init(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), alac_decode_close(), alac_decode_frame(), alac_decode_init(), alac_encode_close(), alac_encode_frame(), alac_encode_init(), allocate_tables(), amr_wb_encode_close(), amr_wb_encode_frame(), amr_wb_encode_init(), amrnb_decode_frame(), amrnb_decode_init(), amrwb_decode_frame(), amrwb_decode_init(), amv_encode_picture(), ape_decode_close(), ape_decode_frame(), ape_decode_init(), ape_flush(), apply_window_and_mdct(), ass_decode_close(), ass_decode_frame(), ass_decode_init(), atrac1_decode_end(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_close(), atrac3_decode_frame(), atrac3_decode_init(), aura_decode_end(), aura_decode_frame(), aura_decode_init(), avcodec_close(), avcodec_copy_context(), avcodec_get_context_defaults3(), avcodec_open2(), avs_decode_end(), avs_decode_frame(), avs_decode_init(), bethsoftvid_decode_end(), bethsoftvid_decode_frame(), bethsoftvid_decode_init(), bfi_decode_close(), bfi_decode_frame(), bfi_decode_init(), bmp_decode_end(), bmp_decode_frame(), bmp_decode_init(), bmp_encode_frame(), bmp_encode_init(), bmv_aud_decode_frame(), bmv_aud_decode_init(), cavs_decode_frame(), cavs_flush(), cdg_decode_end(), cdg_decode_frame(), cdg_decode_init(), cinaudio_decode_frame(), cinaudio_decode_init(), cinepak_decode_end(), cinepak_decode_frame(), cinepak_decode_init(), cinvideo_decode_end(), cinvideo_decode_frame(), cinvideo_decode_init(), close_decoder(), cmv_decode_end(), cmv_decode_frame(), cmv_decode_init(), codec_child_next(), codec_reinit(), codecctl_int(), commit_bitstream_and_slice_buffer(), common_end(), common_init(), cook_decode_close(), cook_decode_frame(), cook_decode_init(), copy_frame(), CustomSource::CustomSource(), cyuv_decode_end(), cyuv_decode_frame(), cyuv_decode_init(), dca_decode_end(), dca_decode_frame(), dca_decode_init(), decode(), decode_ac_coeffs(), decode_chunks(), decode_close(), decode_end(), decode_flush(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_init(), decode_init_thread_copy(), decode_lowdelay_slice(), decode_packet(), decode_picture(), decode_picture_header(), decode_slice(), decode_slice_chroma(), decode_slice_luma(), decode_slice_thread(), decode_subband_arith(), decode_subband_golomb(), decode_tag(), decode_thread(), decode_update_thread_context(), decoder_init(), determine_bitrate(), dfa_decode_end(), dfa_decode_frame(), dfa_decode_init(), dirac_decode_data_unit(), dirac_decode_flush(), dirac_decode_frame(), dirac_decode_init(), display_end_segment(), dnxhd_calc_bits_thread(), dnxhd_decode_close(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_encode_picture(), dnxhd_encode_thread(), dnxhd_mb_var_thread(), dnxhd_write_header(), dpcm_decode_frame(), dpcm_decode_init(), draw_char(), dv_decode_video_segment(), dv_encode_video_segment(), dvbsub_close_decoder(), dvbsub_decode(), dvbsub_display_end_segment(), dvbsub_encode(), dvbsub_init_decoder(), dvbsub_parse_clut_segment(), dvbsub_parse_display_definition_segment(), dvbsub_parse_object_segment(), dvbsub_parse_page_segment(), dvbsub_parse_pixel_data_block(), dvbsub_parse_region_segment(), dvdsub_decode(), dvdsub_init(), dvvideo_close(), dvvideo_init(), eightsvx_decode_close(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_close(), encode_end(), encode_frame(), encode_init(), encode_init_ls(), encode_nals(), encode_picture_lossless(), encode_picture_ls(), encode_rgb48_10bit(), encode_slice(), encode_slice_data(), encode_superframe(), end_frame(), erase_line(), erase_screen(), escape124_decode_close(), escape124_decode_frame(), escape124_decode_init(), escape130_decode_close(), escape130_decode_frame(), escape130_decode_init(), execute_code(), extract_header(), Faac_encode_close(), Faac_encode_frame(), Faac_encode_init(), ff_ac3_encode_close(), ff_ac3_encode_init(), ff_cavs_end(), ff_cavs_init(), ff_cmap_read_palette(), ff_h263_decode_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_decode_end(), ff_h264_decode_init(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_mjpeg_decode_end(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_init(), ff_mpeg_flush(), ff_mpeg_update_thread_context(), ff_msmpeg4_decode_init(), ff_pnm_end(), ff_pnm_init(), ff_rv34_decode_end(), ff_rv34_decode_frame(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), ff_rv34_decode_update_thread_context(), ff_snow_common_init_after_header(), ff_snow_release_buffer(), ff_vdpau_h264_picture_complete(), ff_vdpau_h264_picture_start(), ff_vdpau_h264_set_reference_frames(), ff_vdpau_vc1_decode_picture(), ff_vp56_decode_frame(), ff_vp56_free(), ff_vp56_init(), ff_wma_end(), ff_wma_init(), fill_slice(), fill_slice_long(), finish_frame(), flac_decode_close(), flac_decode_frame(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flashsv2_encode_end(), flashsv2_encode_frame(), flashsv2_encode_init(), flashsv_decode_block(), flashsv_decode_end(), flashsv_decode_frame(), flashsv_decode_init(), flashsv_encode_end(), flashsv_encode_frame(), flashsv_encode_init(), flic_decode_end(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_decode_init(), flush(), flush_dpb(), frame_thread_free(), frame_thread_init(), g722_decode_frame(), g722_decode_init(), g722_encode_close(), g722_encode_init(), g723_1_decode_frame(), g723_1_decode_init(), get_nb_samples(), get_stats(), gif_decode_close(), gif_decode_frame(), gif_decode_init(), gif_encode_close(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), gsm_decode_block(), gsm_decode_frame(), gsm_flush(), gsm_init(), h261_decode_end(), h261_decode_frame(), h261_decode_init(), hscroll(), idcin_decode_end(), idcin_decode_frame(), idcin_decode_init(), imc_decode_close(), imc_decode_frame(), imc_decode_init(), init(), ipvideo_decode_end(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_end(), ir2_decode_frame(), ir2_decode_init(), j2kdec_init(), j2kenc_destroy(), j2kenc_init(), lag_decode_end(), lag_decode_frame(), lag_decode_init(), latm_decode_frame(), latm_decode_init(), libcelt_dec_close(), libcelt_dec_decode(), libcelt_dec_init(), libdirac_decode_close(), libdirac_decode_frame(), libdirac_decode_init(), libdirac_encode_close(), libdirac_encode_frame(), libdirac_encode_init(), libgsm_decode_close(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_close(), libgsm_encode_frame(), libgsm_encode_init(), libgsm_flush(), libopenjpeg_decode_close(), libopenjpeg_decode_frame(), libopenjpeg_decode_init(), libopenjpeg_decode_init_thread_copy(), libopenjpeg_encode_close(), libopenjpeg_encode_frame(), libopenjpeg_encode_init(), libschroedinger_decode_close(), libschroedinger_decode_frame(), libschroedinger_decode_init(), libschroedinger_encode_close(), libschroedinger_encode_frame(), libschroedinger_encode_init(), libschroedinger_flush(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), libspeex_decode_close(), libspeex_decode_flush(), libspeex_decode_frame(), libspeex_decode_init(), log_encoder_error(), mace_decode_frame(), mace_decode_init(), mdec_common_init(), mimic_decode_end(), mimic_decode_frame(), mimic_decode_init(), mimic_decode_update_thread_context(), mjpegb_decode_frame(), mlp_decode_init(), mm_decode_end(), mm_decode_frame(), mm_decode_init(), MP3lame_encode_close(), MP3lame_encode_frame(), MP3lame_encode_init(), mp_decode_end(), mp_decode_frame(), mp_decode_init(), MPA_encode_frame(), MPA_encode_init(), mpc7_decode_close(), mpc7_decode_flush(), mpc7_decode_frame(), mpc7_decode_init(), mpc8_decode_frame(), mpc8_decode_init(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_end(), mpeg_decode_frame(), mpeg_decode_gop(), mpeg_decode_init(), mpeg_decode_postinit(), mpeg_decode_update_thread_context(), mpeg_decode_user_data(), mpeg_get_pixelformat(), MPV_encode_end(), MPV_encode_init(), MPV_encode_picture(), msrle_decode_end(), msrle_decode_frame(), msrle_decode_init(), msvideo1_decode_end(), msvideo1_decode_frame(), msvideo1_decode_init(), mxpeg_decode_end(), mxpeg_decode_frame(), mxpeg_decode_init(), oggvorbis_encode_close(), oggvorbis_encode_frame(), oggvorbis_encode_init(), oggvorbis_init_encoder(), pam_encode_frame(), parse_palette_segment(), parse_picture_segment(), parse_presentation_segment(), pcm_bluray_decode_frame(), pcm_bluray_decode_init(), pcm_decode_frame(), pcm_decode_init(), pcx_decode_frame(), pcx_encode_frame(), pcx_encode_init(), pcx_end(), pcx_init(), png_dec_end(), png_dec_init(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), prores_encode_close(), prores_encode_init(), ptx_decode_frame(), ptx_end(), ptx_init(), put_audio_specific_config(), qcelp_decode_frame(), qcelp_decode_init(), qdm2_decode_close(), qdm2_decode_frame(), qdm2_decode_init(), qtrle_decode_end(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_end(), qtrle_encode_frame(), qtrle_encode_init(), queue_frames(), ra144_decode_frame(), ra144_decode_init(), ra144_encode_close(), ra144_encode_frame(), ra144_encode_init(), ra288_decode_frame(), ra288_decode_init(), raw_close_decoder(), raw_decode(), raw_init_decoder(), raw_init_encoder(), read_access_unit(), read_huffman_tree(), receive_frame(), render_charset(), rl2_decode_end(), rl2_decode_frame(), rl2_decode_init(), roq_decode_end(), roq_decode_frame(), roq_decode_init(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_encode_end(), roq_encode_frame(), roq_encode_init(), rpza_decode_end(), rpza_decode_frame(), rpza_decode_init(), rv10_decode_end(), rv10_decode_frame(), rv10_decode_init(), rv10_decode_packet(), rv30_decode_init(), rv40_decode_init(), s302m_decode_frame(), s302m_decode_init(), seqvideo_decode_end(), seqvideo_decode_frame(), seqvideo_decode_init(), SetSchroChromaFormat(), sgi_end(), sgi_init(), shorten_decode_close(), shorten_decode_frame(), shorten_decode_init(), show_stream(), sipr_decode_frame(), sipr_decoder_init(), slice_end(), smc_decode_end(), smc_decode_frame(), smc_decode_init(), smka_decode_frame(), smka_decode_init(), srt_encode_close(), srt_encode_frame(), srt_encode_init(), Stagefright_close(), Stagefright_decode_frame(), Stagefright_init(), start_frame(), submit_stats(), sunrast_decode_frame(), sunrast_end(), sunrast_init(), svq1_decode_end(), svq1_decode_frame(), svq1_decode_init(), svq1_encode_end(), svq1_encode_frame(), svq1_encode_init(), svq3_decode_end(), svq3_decode_frame(), svq3_decode_init(), svq3_decode_slice_header(), synth_frame(), synth_superframe(), targa_encode_init(), targa_end(), targa_init(), tgq_decode_end(), tgq_decode_frame(), tgq_decode_init(), tgv_decode_end(), tgv_decode_frame(), tgv_decode_init(), tiff_end(), tiff_init(), tmv_decode_close(), tmv_decode_frame(), tmv_decode_init(), tqi_decode_end(), tqi_decode_frame(), tqi_decode_init(), truemotion1_decode_end(), truemotion1_decode_frame(), truemotion1_decode_init(), truespeech_decode_frame(), truespeech_decode_init(), tta_decode_close(), tta_decode_frame(), tta_decode_init(), twin_decode_close(), twin_decode_frame(), twin_decode_init(), txd_decode_frame(), txd_end(), txd_init(), ulti_decode_end(), ulti_decode_frame(), ulti_decode_init(), uninit(), update_frames(), utvideo_decode_close(), utvideo_decode_frame(), utvideo_decode_init(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_end_frame(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_end_frame(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), vaapi_vc1_end_frame(), vaapi_vc1_start_frame(), vble_decode_close(), vble_decode_frame(), vble_decode_init(), vc1_decode_end(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), video_encode_example(), vmdaudio_decode_frame(), vmdaudio_decode_init(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vmdvideo_decode_init(), vorbis_decode_close(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_frame(), vorbis_encode_init(), vp3_decode_end(), vp3_decode_flush(), vp3_decode_frame(), vp3_decode_init(), vp3_init_thread_copy(), vp3_update_thread_context(), vp56_size_changed(), vp5_decode_init(), vp6_decode_free(), vp6_decode_init(), vp8_decode(), vp8_decode_flush_impl(), vp8_decode_frame(), vp8_decode_free(), vp8_decode_init(), vp8_decode_init_thread_copy(), vp8_decode_update_thread_context(), vp8_encode(), vp8_free(), vp8_init(), vqa_decode_end(), vqa_decode_frame(), vqa_decode_init(), wavesynth_close(), wavesynth_decode(), wavesynth_init(), wavesynth_parse_extradata(), wavpack_decode_block(), wavpack_decode_end(), wavpack_decode_flush(), wavpack_decode_frame(), wavpack_decode_init(), wma_decode_init(), wma_decode_superframe(), wmavoice_decode_end(), wmavoice_decode_init(), wmavoice_decode_packet(), wmavoice_flush(), wmv2_decode_end(), wmv2_decode_init(), wmv2_encode_init(), ws_snd_decode_frame(), ws_snd_decode_init(), X264_close(), X264_frame(), X264_init(), xan_decode_chroma(), xan_decode_end(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), XAVS_close(), XAVS_frame(), XAVS_init(), yop_decode_close(), yop_decode_frame(), and yop_decode_init().

int AVCodecContext::profile

profile

• encoding: Set by user.

• decoding: Set by libavcodec.

Definition at line 2516 of file avcodec.h.

Referenced by aac_encode_init(), aacPlus_encode_init(), avcodec_string(), avpriv_dirac_parse_sequence_header(), dca_decode_frame(), decode_slice_header(), encode_init(), encode_slice(), Faac_encode_init(), 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(), update_context_from_thread(), vc1_decode_init(), and vp8_init().

attribute_deprecated float AVCodecContext::psy_rd

PSY RD Strength of psychovisual optimization

• encoding: Set by user
• decoding: unused.

Definition at line 3065 of file avcodec.h.

Referenced by X264_init().

attribute_deprecated float AVCodecContext::psy_trellis

PSY trellis Strength of psychovisual optimization

• encoding: Set by user
• decoding: unused.

Definition at line 3073 of file avcodec.h.

Referenced by X264_init().

int64_t AVCodecContext::pts_correction_last_dts

PTS of the last frame.

Definition at line 3242 of file avcodec.h.

Referenced by avcodec_open2(), and guess_correct_pts().

int64_t AVCodecContext::pts_correction_last_pts

Number of incorrect DTS values so far.

Definition at line 3241 of file avcodec.h.

Referenced by avcodec_open2(), and guess_correct_pts().

int64_t AVCodecContext::pts_correction_num_faulty_dts

Number of incorrect PTS values so far.

Definition at line 3240 of file avcodec.h.

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

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 3239 of file avcodec.h.

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

float AVCodecContext::qblur

amount of qscale smoothing over time (0.0-1.0)

Definition at line 1537 of file avcodec.h.

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

float AVCodecContext::qcompress

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

Definition at line 1536 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), get_qscale(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::qmax

maximum quantizer

• encoding: Set by user.

• decoding: unused

Definition at line 1551 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), dnxhd_encode_rdo(), dnxhd_find_qscale(), dnxhd_init_qmat(), dnxhd_init_rc(), encode_thread(), ff_init_qscale_tab(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), MPV_encode_init(), parse_ffconfig(), update_qscale(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::qmin

minimum quantizer

• encoding: Set by user.

• decoding: unused

Definition at line 1544 of file avcodec.h.

Referenced by add_codec(), avcodec_string(), compute_status(), encode_thread(), ff_init_qscale_tab(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), init_pass2(), MPV_encode_init(), parse_ffconfig(), update_qscale(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::quantizer_noise_shaping

quantizer noise shaping

• encoding: Set by user.

• decoding: unused

Definition at line 2438 of file avcodec.h.

Referenced by dct_quantize_refine(), and encode_mb_internal().

float AVCodecContext::rc_buffer_aggressivity

Definition at line 1885 of file avcodec.h.

Referenced by add_codec(), ffm_read_header(), ffm_write_header(), modify_qscale(), and vp8_init().

int AVCodecContext::rc_buffer_size

decoder bitstream buffer size

• encoding: Set by user.

• decoding: unused

Definition at line 1884 of file avcodec.h.

Referenced by add_codec(), ff_rate_control_init(), ff_vbv_update(), ff_xvid_rate_control_init(), 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(), MPV_encode_init(), MPV_encode_picture(), new_video_stream(), parse_ffconfig(), select_input_picture(), transcode_init(), vp8_init(), X264_init(), and XAVS_init().

const char* AVCodecContext::rc_eq

rate control equation

• encoding: Set by user
• decoding: unused

Definition at line 1863 of file avcodec.h.

Referenced by add_codec(), avcodec_copy_context(), ff_rate_control_init(), ffm_close(), ffm_read_header(), ffm_write_header(), and get_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 2397 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_xvid_rate_control_init(), new_video_stream(), vp8_init(), X264_init(), and XAVS_init().

float AVCodecContext::rc_initial_cplx

initial complexity for pass1 ratecontrol

• encoding: Set by user.

• decoding: unused

Definition at line 1908 of file avcodec.h.

Referenced by ff_rate_control_init().

attribute_deprecated int AVCodecContext::rc_lookahead

RC lookahead Number of frames for frametype and ratecontrol lookahead

• encoding: Set by user
• decoding: unused.

Definition at line 3081 of file avcodec.h.

Referenced by vp8_init(), and X264_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 2938 of file avcodec.h.

Referenced by modify_qscale(), and MPV_encode_picture().

int AVCodecContext::rc_max_rate

maximum bitrate

• encoding: Set by user.

• decoding: unused

Definition at line 1870 of file avcodec.h.

Referenced by add_codec(), ff_vbv_update(), ff_xvid_rate_control_init(), ffm_read_header(), ffm_write_header(), modify_qscale(), mov_write_esds_tag(), mpeg1_encode_sequence_header(), mpeg_mux_init(), MPV_encode_init(), MPV_encode_picture(), oggvorbis_init_encoder(), parse_ffconfig(), transcode_init(), vp8_init(), X264_init(), and XAVS_init().

int AVCodecContext::rc_min_rate

minimum bitrate

• encoding: Set by user.

• decoding: unused

Definition at line 1877 of file avcodec.h.

Referenced by ff_vbv_update(), ffm_read_header(), ffm_write_header(), modify_qscale(), MPV_encode_init(), MPV_encode_picture(), oggvorbis_init_encoder(), parse_ffconfig(), and vp8_init().

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 2945 of file avcodec.h.

Referenced by modify_qscale().

RcOverride* AVCodecContext::rc_override

ratecontrol override, see RcOverride

• encoding: Allocated/set/freed by user.

• decoding: unused

Definition at line 1855 of file avcodec.h.

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

int AVCodecContext::rc_override_count

Definition at line 1856 of file avcodec.h.

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

float AVCodecContext::rc_qmod_amp

Definition at line 1847 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_qmod_freq

Definition at line 1848 of file avcodec.h.

Referenced by modify_qscale().

float AVCodecContext::rc_qsquish

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

• encoding: Set by user.
• decoding: unused

Definition at line 1845 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_strategy

obsolete FIXME remove

Definition at line 1578 of file avcodec.h.

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

int AVCodecContext::refs

number of reference frames

• encoding: Set by user.

• decoding: Set by lavc.

Definition at line 2721 of file avcodec.h.

Referenced by config(), decode_slice_header(), ffm_read_header(), ffm_write_header(), X264_init(), and XAVS_init().

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.

Referenced by aasc_decode_frame(), avcodec_get_context_defaults3(), avs_decode_frame(), bethsoftvid_decode_frame(), cdg_decode_frame(), cinepak_decode_frame(), cinvideo_decode_frame(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), flashsv_decode_frame(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), ir2_decode_frame(), mm_decode_frame(), mp_decode_frame(), msrle_decode_frame(), msvideo1_decode_frame(), qtrle_decode_frame(), roq_decode_frame(), rpza_decode_frame(), seqvideo_decode_frame(), smc_decode_frame(), Stagefright_decode_frame(), truemotion1_decode_frame(), ulti_decode_frame(), and xan_decode_frame().

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.

Referenced by aasc_decode_end(), aura_decode_end(), aura_decode_frame(), avcodec_decode_audio3(), avcodec_default_reget_buffer(), avcodec_get_context_defaults3(), avs_decode_end(), bethsoftvid_decode_end(), bfi_decode_close(), bfi_decode_frame(), bmp_decode_end(), bmp_decode_frame(), cavs_decode_frame(), cdg_decode_end(), cdg_decode_frame(), cinepak_decode_end(), cinvideo_decode_end(), cmv_decode_end(), cmv_decode_frame(), common_end(), copy_frame(), cyuv_decode_end(), cyuv_decode_frame(), decode_close(), decode_end(), decode_flush(), decode_frame(), decode_pic(), dfa_decode_end(), dfa_decode_frame(), dirac_decode_frame(), dvvideo_close(), escape124_decode_close(), escape124_decode_frame(), escape130_decode_close(), escape130_decode_frame(), execute_code(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_mjpeg_decode_end(), ff_mjpeg_decode_sof(), ff_pnm_end(), ff_snow_common_end(), ff_snow_release_buffer(), ff_thread_release_buffer(), ff_vp56_decode_frame(), ff_vp56_free(), flashsv_decode_end(), flashsv_decode_frame(), flic_decode_end(), flush(), free_sequence_buffers(), get_siz(), gif_decode_close(), gif_decode_frame(), idcin_decode_end(), idcin_decode_frame(), init_image(), init_input_stream(), ipvideo_decode_end(), ipvideo_decode_frame(), ir2_decode_end(), lag_decode_end(), lag_decode_frame(), mm_decode_end(), mp_decode_end(), msrle_decode_end(), msvideo1_decode_end(), mxpeg_decode_end(), mxpeg_decode_frame(), pcx_decode_frame(), pcx_end(), png_dec_end(), pnm_decode_frame(), ptx_decode_frame(), ptx_end(), qtrle_decode_end(), release_delayed_buffers(), rl2_decode_end(), rl2_decode_frame(), roq_decode_end(), roq_encode_end(), rpza_decode_end(), select_input_picture(), seqvideo_decode_end(), sgi_end(), smc_decode_end(), Stagefright_close(), sunrast_decode_frame(), sunrast_end(), svq1_encode_end(), targa_end(), tgq_decode_end(), tgq_decode_frame(), tiff_end(), tmv_decode_close(), tmv_decode_frame(), tqi_decode_end(), tqi_decode_frame(), truemotion1_decode_end(), truemotion1_decode_header(), txd_decode_frame(), txd_end(), ulti_decode_end(), uninit(), update_context_from_user(), v308_decode_close(), v308_decode_frame(), v410_decode_close(), v410_decode_frame(), vble_decode_close(), vble_decode_frame(), vc1_decode_end(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vqa_decode_end(), vqa_decode_frame(), xan_decode_end(), xan_decode_frame(), xwd_decode_close(), xwd_decode_frame(), y41p_decode_close(), y41p_decode_frame(), yop_decode_close(), yop_decode_frame(), yuv4_decode_close(), and yuv4_decode_frame().

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 2910 of file avcodec.h.

Referenced by audio_get_buffer(), avcodec_get_context_defaults3(), ff_init_buffer_info(), raw_decode(), update_context_from_user(), and video_get_buffer().

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 2931 of file avcodec.h.

Referenced by dca_decode_frame(), and read_major_sync().

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 2889 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(), read_major_sync(), read_restart_header(), 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 3203 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_init(), atrac3_decode_init(), dca_decode_init(), decode_init(), and vorbis_decode_init().

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

Referenced by encode_thread().

int AVCodecContext::rtp_payload_size

Definition at line 1587 of file avcodec.h.

Referenced by encode_thread(), and MPV_encode_init().

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.

Definition at line 2047 of file avcodec.h.

Referenced by add_av_stream1(), avcodec_decode_video2(), avcodec_get_context_defaults3(), avcodec_string(), avformat_write_header(), decode_frame(), decode_sequence_header_adv(), decode_slice_header(), decode_vol_header(), dump_stream_format(), dv_write_pack(), encode_frame(), encode_init(), ff_h263_decode_picture_header(), ff_h263_encode_picture_header(), ff_init_buffer_info(), ff_intel_h263_decode_picture_header(), ff_thread_decode_frame(), init_filters(), jpeg_put_comments(), lavfi_read_header(), 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(), MPV_encode_init(), new_video_stream(), parse_source_parameters(), show_stream(), transcode_init(), transcode_video(), truemotion1_decode_header(), update_context_from_thread(), video_get_buffer(), video_image_display(), X264_frame(), X264_init(), and XAVS_init().

enum AVSampleFormat AVCodecContext::sample_fmt

audio sample format

• encoding: Set by user.

• decoding: Set by libavcodec. sample format

Definition at line 1516 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_decode_init(), ac3_decode_frame(), ac3_decode_init(), add_audio_stream(), adpcm_decode_init(), adx_decode_init(), alac_decode_init(), alac_encode_init(), amr_decode_fix_avctx(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), atrac1_decode_init(), atrac3_decode_frame(), atrac3_decode_init(), audio_decode_example(), audio_decode_frame(), audio_encode_example(), audio_get_buffer(), avcodec_decode_audio3(), avcodec_decode_audio4(), avcodec_encode_audio(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), bmv_aud_decode_init(), cdata_read_header(), choose_sample_fmt(), cinaudio_decode_init(), cook_decode_init(), dca_decode_frame(), dca_decode_init(), decode_frame(), decode_init(), decode_tag(), decoder_init(), do_audio_out(), dpcm_decode_init(), dprint_options(), dshow_add_device(), eightsvx_decode_init(), encode_audio_frame(), ff_aac_sbr_ctx_init(), ffm_read_header(), ffm_write_header(), flac_decode_init(), flac_encode_init(), flic_read_header(), flush_encoders(), g722_decode_init(), g723_1_decode_init(), gsm_init(), has_codec_parameters(), imc_decode_init(), lavfi_read_header(), libcelt_dec_init(), libgsm_decode_init(), libspeex_decode_init(), mace_decode_init(), mkv_write_tracks(), mlp_parse(), MP3lame_encode_frame(), MP3lame_encode_init(), mpc7_decode_init(), mpc8_decode_init(), new_audio_stream(), output_data(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_init(), qcelp_decode_init(), qdm2_decode_init(), ra144_decode_init(), ra144_encode_init(), ra288_decode_init(), read_major_sync(), roq_dpcm_encode_init(), s302m_parse_frame_header(), shorten_decode_init(), show_stream(), sipr_decoder_init(), smka_decode_frame(), smka_decode_init(), transcode_audio(), transcode_init(), truespeech_decode_init(), tta_decode_init(), twin_decode_init(), vmdaudio_decode_init(), vorbis_decode_frame(), vorbis_decode_init(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_frame(), wavpack_decode_init(), wma_decode_init(), wmavoice_decode_init(), and ws_snd_decode_init().

int AVCodecContext::sample_rate

samples per second

Definition at line 1508 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_decode_init(), aac_encode_frame(), aac_encode_init(), aacPlus_encode_init(), ac3_decode_frame(), add_audio_stream(), add_av_stream(), add_codec(), adpcm_encode_init(), adx_encode_header(), adx_encode_init(), adx_read_header(), aea_read_header(), aiff_read_header(), aiff_write_header(), alac_encode_init(), amr_decode_fix_avctx(), amr_read_header(), amr_wb_encode_init(), apc_read_header(), ape_read_header(), apply_param_change(), atrac3_decode_init(), au_read_header(), audio_decode_frame(), audio_encode_example(), audio_read_header(), audio_write_header(), avcodec_encode_audio(), avcodec_encode_audio2(), avcodec_open2(), avcodec_string(), avformat_write_header(), avisynth_read_header(), avpriv_adx_decode_header(), avpriv_flac_parse_streaminfo(), bfi_read_header(), bmv_read_header(), caf_write_header(), cdata_read_header(), celt_header(), choose_sample_rate(), cin_read_header(), compute_frame_duration(), compute_status(), cook_decode_init(), create_audio_stream(), create_vorbis_context(), daud_header(), daud_write_header(), dca_decode_frame(), decode_frame(), decode_init(), decode_ppc(), decode_stream_header(), decode_tag(), decode_wave_header(), do_audio_out(), dshow_add_device(), dv_extract_audio_info(), dv_init_mux(), ea_read_header(), encode_frame(), encode_init(), Faac_encode_init(), ff_aac_ac3_parse(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_specific_params(), ff_psy_preprocess_init(), ff_raw_read_header(), ff_rtp_get_codec_info(), ff_rtp_parse_open(), ff_wma_init(), ffm_read_header(), ffm_write_header(), film_read_header(), find_expected_header(), find_stream_in_feed(), flac_encode_init(), flac_header(), flic_read_header(), flv_read_packet(), flv_set_audio_codec(), flv_write_header(), fourxm_read_header(), g723_1_init(), g729_read_header(), get_aiff_header(), get_audio_flags(), get_audio_frame_size(), get_best_header(), get_bit_rate(), get_codec_data(), get_sindex(), gsm_init(), gsm_read_header(), gxf_write_header(), handle_file(), has_codec_parameters(), idcin_read_header(), iff_read_header(), init_bitstream_params(), ipmovie_read_header(), iss_read_header(), lavfi_read_header(), libcelt_dec_init(), libgsm_decode_init(), libgsm_encode_init(), libspeex_decode_init(), lxf_read_header(), matroska_read_header(), mkv_write_tracks(), mlp_parse(), mmf_read_header(), modplug_read_header(), mov_read_trak(), mov_write_audio_tag(), mov_write_esds_tag(), mov_write_header(), mov_write_uuidprof_tag(), mp3_header_decompress(), MP3lame_encode_init(), MPA_encode_init(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegaudio_parse(), mpegps_read_packet(), mpegts_write_header(), mtv_read_header(), mxf_parse_structural_metadata(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_wav_common(), mxg_read_header(), new_audio_stream(), nsv_read_chunk(), nut_read_header(), ogg_write_header(), oggvorbis_encode_frame(), oggvorbis_init_encoder(), ogm_dshow_header(), ogm_header(), oma_read_header(), oma_write_header(), open_audio(), output_packet(), parse_adts_frame_header(), parse_ffconfig(), pcm_bluray_parse_header(), pcm_read_seek(), pmp_header(), psy_3gpp_init(), pulse_read_header(), qcp_read_header(), qdm2_decode_init(), r3d_read_reda(), read_desc_chunk(), read_header(), read_major_sync(), read_packet(), read_specific_config(), rl2_read_header(), rm_read_audio_stream_info(), rm_write_header(), roq_dpcm_encode_init(), roq_read_packet(), rso_read_header(), rso_write_header(), rtp_write_header(), rv10_write_header(), s302m_parse_frame_header(), sbg_read_header(), search_for_quantizers_twoloop(), seq_read_header(), show_stream(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), sol_read_header(), sox_read_header(), sox_write_header(), spdif_read_packet(), speex_header(), str_read_packet(), stream_component_open(), stream_cycle_channel(), swf_write_header(), thp_read_header(), tmv_read_header(), transcode_audio(), transcode_init(), tta_decode_init(), tta_read_header(), twin_decode_frame(), twin_decode_init(), validate_options(), vid_read_header(), vid_read_packet(), vmd_read_header(), vmdaudio_decode_init(), voc_get_packet(), voc_write_packet(), vorbis_decode_init(), vorbis_header(), vqf_read_header(), wavesynth_parse_extradata(), wc3_read_header(), wmavoice_decode_init(), write_streamheader(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), and yop_read_header().

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 2802 of file avcodec.h.

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 2346 of file avcodec.h.

Referenced by encode_picture(), ffm_read_header(), ffm_write_header(), MPV_encode_init(), X264_init(), and XAVS_init().

int AVCodecContext::skip_bottom

Number of macroblock rows at the bottom which are skipped.

• encoding: unused
• decoding: Set by user.

Definition at line 2509 of file avcodec.h.

Referenced by decode_chunks(), and ff_er_frame_end().

int AVCodecContext::skip_count

Definition at line 1610 of file avcodec.h.

Referenced by MPV_encode_picture().

enum AVDiscard AVCodecContext::skip_frame

• encoding: unused
  • decoding: Set by user.

Definition at line 2675 of file avcodec.h.

Referenced by decode_chunks(), decode_frame(), decode_nal_units(), ff_h263_decode_frame(), ff_rv34_decode_frame(), h261_decode_frame(), stream_component_open(), svq1_decode_frame(), svq3_decode_frame(), vc1_decode_frame(), and vp8_decode_frame().

enum AVDiscard AVCodecContext::skip_idct

• encoding: unused
  • decoding: Set by user.

Definition at line 2668 of file avcodec.h.

Referenced by MPV_decode_mb_internal(), and stream_component_open().

enum AVDiscard AVCodecContext::skip_loop_filter

• encoding: unused
  • decoding: Set by user.

Definition at line 2661 of file avcodec.h.

Referenced by decode_slice_header(), stream_component_open(), vc1_decode_p_blocks(), vc1_decode_sequence_header(), vp56_mc(), and vp8_decode_frame().

int AVCodecContext::skip_top

Number of macroblock rows at the top which are skipped.

• encoding: unused
• decoding: Set by user.

Definition at line 2502 of file avcodec.h.

Referenced by ff_er_add_slice(), and ff_er_frame_end().

int AVCodecContext::slice_count

slice count

• encoding: Set by libavcodec.

• decoding: Set by user (or 0).

Definition at line 1996 of file avcodec.h.

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

int AVCodecContext::slice_flags

slice flags

• encoding: unused
• decoding: Set by user.

Definition at line 2296 of file avcodec.h.

Referenced by ff_draw_horiz_band(), and update_context_from_user().

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 2002 of file avcodec.h.

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

int AVCodecContext::slices

Number of slices.

Indicates number of picture subdivisions. Used for parallelized decoding.

• encoding: Set by user
• decoding: unused

Definition at line 3118 of file avcodec.h.

Referenced by MPV_common_init(), vp8_init(), and X264_init().

float AVCodecContext::spatial_cplx_masking

spatial complexity masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1943 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_encode_init().

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 1837 of file avcodec.h.

Referenced by ff_rate_control_init(), submit_stats(), transcode(), transcode_init(), and vp8_init().

char* AVCodecContext::stats_out

pass1 encoding statistics output buffer

• encoding: Set by libavcodec.

• decoding: unused

Definition at line 1829 of file avcodec.h.

Referenced by common_end(), do_video_out(), encode_close(), ff_write_pass1_stats(), flush_encoders(), get_stats(), MPV_common_end(), MPV_common_init(), vp8_encode(), and vp8_free().

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 2338 of file avcodec.h.

Referenced by avi_read_header(), avisynth_read_header(), and MPV_common_init().

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 1696 of file avcodec.h.

Referenced by assert_codec_experimental(), avcodec_open2(), choose_pixel_fmt(), config(), decode_postinit(), encode_init(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), libgsm_encode_init(), mov_get_codec_tag(), mp3_header_compress(), MPV_encode_init(), parse_ffconfig(), and validate_codec_tag().

int AVCodecContext::sub_id

Some codecs need additional format info.

It is stored here. If any muxer uses this then ALL demuxers/parsers AND encoders for the specific codec MUST set it correctly otherwise stream copy breaks. In general use of this field by muxers is not recommended.

• encoding: Set by libavcodec.
• decoding: Set by libavcodec. (FIXME: Is this OK?)

Definition at line 1417 of file avcodec.h.

Referenced by avpriv_mpa_decode_header(), decode_frame(), mpeg1_decode_sequence(), mpeg_decode_postinit(), mpeg_decode_sequence_extension(), mpegvideo_extract_headers(), rv10_decode_init(), rv20_decode_picture_header(), update_context_from_thread(), and vcr2_init_sequence().

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 3128 of file avcodec.h.

Referenced by ass_decode_init(), ass_encode_init(), avcodec_open2(), avformat_free_context(), ff_ass_subtitle_header(), srt_encode_init(), transcode(), and transcode_init().

int AVCodecContext::subtitle_header_size

Definition at line 3129 of file avcodec.h.

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

float AVCodecContext::temporal_cplx_masking

temporary complexity masking (0-> disabled)

• encoding: Set by user.

• decoding: unused

Definition at line 1936 of file avcodec.h.

Referenced by adaptive_quantization(), and MPV_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 2446 of file avcodec.h.

Referenced by avcodec_open2(), avcodec_thread_execute(), avcodec_thread_init(), decode_chunks(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_load_picture(), ff_er_add_slice(), ff_h264_alloc_tables(), ff_thread_decode_frame(), ff_thread_flush(), ff_thread_free(), ffm_read_header(), ffm_write_header(), frame_thread_init(), MPV_common_init(), MPV_encode_init(), thread_free(), thread_init(), update_context_from_thread(), validate_thread_parameters(), vp8_init(), worker(), X264_init(), and XAVS_init().

void* AVCodecContext::thread_opaque

thread opaque Can be used by execute() to store some per AVCodecContext stuff.

• encoding: set by execute()
• decoding: set by execute()

Definition at line 2465 of file avcodec.h.

Referenced by avcodec_close(), avcodec_copy_context(), avcodec_open2(), avcodec_thread_execute(), avcodec_thread_execute2(), ff_thread_await_progress(), ff_thread_decode_frame(), ff_thread_finish_setup(), ff_thread_flush(), ff_thread_get_buffer(), ff_thread_init(), ff_thread_release_buffer(), ff_thread_report_progress(), frame_thread_free(), frame_thread_init(), free_progress(), thread_free(), thread_init(), and worker().

int AVCodecContext::thread_safe_callbacks

Set by the client if its custom get_buffer() callback can be called 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 3180 of file avcodec.h.

Referenced by ff_thread_get_buffer(), frame_worker_thread(), submit_packet(), and update_context_from_user().

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 3161 of file avcodec.h.

Referenced by validate_thread_parameters().

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 2961 of file avcodec.h.

Referenced by compute_frame_duration(), compute_pkt_fields2(), decode_sequence_header_adv(), ff_h264_decode_init(), mpeg_decode_postinit(), optimum_dist(), optimum_use15_7(), output_packet(), transcode_init(), transcode_video(), update_context_from_thread(), vc1_extract_headers(), and vp8_encode().

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.

Definition at line 1450 of file avcodec.h.

Referenced by add_av_stream(), add_codec(), add_video_stream(), avcodec_encode_audio(), avcodec_encode_audio2(), avcodec_get_context_defaults3(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avformat_write_header(), avi_write_header(), avs_read_packet(), cmv_process_header(), compute_frame_duration(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), config(), dc1394_read_header(), decode_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_vol_header(), decode_vop_header(), dirac_header(), do_video_out(), do_video_stats(), dshow_add_device(), dump_stream_format(), dv_extract_video_info(), encode_audio_frame(), encode_ext_header(), encode_frame(), encode_init(), estimate_best_b_count(), fbdev_read_header(), ff_dirac_schro_get_video_format_idx(), 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_mov_read_stsd_entries(), ff_parse_specific_params(), ff_rate_control_init(), ff_rate_estimate_qscale(), ff_raw_video_read_header(), ff_set_mpeg4_time(), ff_vbv_update(), ff_vdpau_mpeg4_decode_picture(), ff_xvid_rate_control_init(), ff_xvid_rate_estimate_qscale(), ffm_read_header(), ffm_write_header(), find_frame_rate_index(), flush_encoders(), flv_write_header(), gif_write_video(), grab_read_header(), h261_decode_picture_header(), init_filters(), init_pass2(), lavfi_read_header(), libdirac_decode_frame(), libdirac_encode_init(), libschroedinger_encode_init(), libschroedinger_handle_first_access_unit(), mkv_write_tracks(), modify_qscale(), mov_get_dv_codec_tag(), mov_write_header(), mov_write_uuidprof_tag(), mpeg4_encode_gop_header(), mpeg4_encode_picture_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), mpegts_write_header(), mpegvideo_extract_headers(), mpegvideo_parse(), MPV_encode_init(), MPV_encode_picture(), mxf_write_header(), ogg_write_header(), oggvorbis_encode_frame(), ogm_dshow_header(), ogm_header(), opt_target(), optimum_dist(), optimum_use15_7(), output_packet(), parse_ffconfig(), parse_source_parameters(), parse_timecode_in_framenum_format(), queue_picture(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_redv(), r3d_seek(), rm_write_header(), rtp_write_header(), set_frame_distances(), show_stream(), swf_read_packet(), swf_write_header(), tb_unreliable(), tgq_decode_init(), tgv_decode_init(), theora_header(), tqi_decode_init(), transcode_init(), transcode_video(), txd_read_header(), update_context_from_thread(), v4l2_read_header(), v4l2_set_parameters(), vaapi_mpeg4_start_frame(), vfw_read_header(), video_encode_example(), vp8_init(), write_audio_frame(), write_trailer(), write_video_frame(), x11grab_read_header(), X264_init(), and XAVS_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 2880 of file avcodec.h.

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

int AVCodecContext::trellis

trellis RD quantization

• encoding: Set by user.

• decoding: unused

Definition at line 2744 of file avcodec.h.

Referenced by adpcm_compress_trellis(), adpcm_encode_init(), encode_block(), encode_end(), encode_init(), g722_encode_init(), MPV_encode_init(), X264_init(), and XAVS_init().

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 3188 of file avcodec.h.

Referenced by MPV_encode_picture().

attribute_deprecated int AVCodecContext::weighted_p_pred

explicit P-frame weighted prediction analysis method 0: off 1: fast blind weighting (one reference duplicate with -1 offset) 2: smart weighting (full fade detection analysis)

• encoding: Set by user.

• decoding: unused

Definition at line 3039 of file avcodec.h.

Referenced by X264_init().

int AVCodecContext::width

picture width / height.

• encoding: MUST be set by user.
• decoding: Set by libavcodec. Note: For compatibility it is possible to set this instead of coded_width/height before decoding.

Definition at line 1460 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_av_stream(), add_codec(), add_video_stream(), alloc_buffer(), alloc_picture(), apply_param_change(), asf_read_stream_properties(), asf_write_header1(), aura_decode_frame(), aura_decode_init(), av_mpeg4_decode_header(), avcodec_decode_video2(), avcodec_default_reget_buffer(), avcodec_encode_video(), avcodec_open2(), avcodec_set_dimensions(), avcodec_string(), avformat_write_header(), avi_read_header(), avi_write_header(), avisynth_read_header(), avpriv_dv_frame_profile2(), avs_read_packet(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bfi_read_header(), bink_decode_plane(), binkb_decode_plane(), bmp_decode_frame(), bmp_encode_frame(), bmv_read_header(), cdg_decode_init(), cin_read_header(), cinepak_decode(), cinepak_decode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_get_buffer(), codec_reinit(), common_init(), compute_status(), config(), CustomSource::CustomSource(), cyuv_decode_init(), dc1394_read_header(), decode_13(), decode_frame(), decode_frame_byterun1(), decode_frame_header(), decode_frame_ilbm(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_p_frame(), decode_picture_header(), decode_seq_header(), decode_sequence_header_adv(), decode_slice_header(), decode_stream_header(), dfa_decode_frame(), dfa_decode_init(), dfa_read_header(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_write_header(), do_streamcopy(), do_video_resample(), do_video_stats(), draw_char(), dshow_add_device(), dump_stream_format(), dv_write_pack(), dvvideo_init_encoder(), dxa_read_header(), ea_read_header(), encode_frame(), 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(), execute_code(), fbdev_read_header(), ff_ccitt_unpack(), ff_create_schro_frame(), ff_dirac_schro_get_video_format_idx(), ff_dnxhd_find_cid(), ff_init_buffer_info(), ff_mov_read_stsd_entries(), ff_mpeg_update_thread_context(), ff_pnm_decode_header(), ff_print_debug_info(), ff_raw_read_header(), ff_rm_read_mdpr_codecdata(), ff_rv34_decode_init(), ff_sauce_read(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_frame_start(), ff_thread_decode_frame(), ffm_read_header(), ffm_write_header(), fill_picture_parameters(), film_read_header(), find_stream_in_feed(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), flic_read_header(), fourxm_read_header(), get_siz(), gif_encode_init(), gif_image_write_header(), gif_image_write_image(), gif_write_header(), gif_write_video(), grab_read_header(), halfpel_interpol(), handle_file(), has_codec_parameters(), hscroll(), idcin_decode_vlcs(), idcin_read_header(), iff_read_header(), init(), init_bundles(), init_filters(), init_image(), init_slice_contexts(), ipmovie_read_header(), ipvideo_decode_frame(), ipvideo_decode_opcodes(), ir2_decode_frame(), ivf_write_header(), j2kenc_init(), lag_decode_frame(), lavfi_read_header(), libdirac_decode_frame(), libdirac_encode_frame(), libdirac_encode_init(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libopenjpeg_encode_frame(), libschroedinger_decode_frame(), libschroedinger_encode_init(), libschroedinger_frame_from_data(), libschroedinger_handle_first_access_unit(), matroska_read_header(), mca(), mimic_decode_frame(), mj2_create_image(), mkv_write_tracks(), mm_decode_intra(), modplug_read_header(), mov_get_dv_codec_tag(), mov_read_trak(), mov_write_avid_tag(), mov_write_header(), mov_write_tapt_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), mov_write_video_tag(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_decode_line(), mp_read_changes_map(), mpegvideo_extract_headers(), MPV_encode_init(), MPV_frame_start(), msrle_decode_frame(), msrle_decode_pal4(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), mtv_read_header(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_write_cdci_common(), new_video_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogm_dshow_header(), ogm_header(), open_video(), opt_output_file(), pam_encode_frame(), parse_ffconfig(), parse_h264_sdp_line(), parse_picture_segment(), parse_presentation_segment(), pcx_decode_frame(), pcx_encode_frame(), pmp_header(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), pre_process_video_frame(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), ptx_decode_frame(), qtrle_encode_frame(), qtrle_encode_init(), queue_picture(), r3d_read_red1(), raw_decode(), raw_encode(), raw_init_decoder(), rawvideo_read_packet(), read_header(), read_packet(), read_seek(), receive_frame(), 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(), sdl_write_header(), sdl_write_packet(), seq_read_header(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smc_decode_stream(), smjpeg_write_header(), sp5x_decode_frame(), Stagefright_decode_frame(), Stagefright_init(), str_read_packet(), sunrast_decode_frame(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_init(), swf_write_header(), swf_write_video(), targa_encode_frame(), 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(), transcode_video(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), truemotion1_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), utvideo_decode_frame(), utvideo_decode_init(), v308_decode_frame(), v308_decode_init(), v308_encode_frame(), v308_encode_init(), 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(), vfw_read_header(), vid_read_header(), vid_read_packet(), video_decode_example(), video_encode_example(), video_get_buffer(), video_open(), video_thread(), vmd_decode(), vp3_decode_init(), vp6_parse_header(), vp8_decode(), vp8_init(), wc3_read_header(), write_streamheader(), write_trailer(), write_video_frame(), 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(), xiph_parse_fmtp_pair(), xmv_read_header(), xwd_decode_frame(), xwd_encode_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_read_header(), yuv4_read_packet(), and zmbv_me().

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 1651 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::xvmc_acceleration

XVideo Motion Acceleration

• encoding: forbidden
• decoding: set by decoder.

Definition at line 2306 of file avcodec.h.

Referenced by dsputil_init_mmx(), ff_er_frame_end(), ff_xvmc_decode_mb(), is_intra_more_likely(), mpeg_decode_mb(), mpeg_decode_slice(), mpeg_field_start(), mpeg_get_pixelformat(), MPV_decode_mb_internal(), MPV_frame_end(), MPV_frame_start(), and slice_end().

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

• libavcodec/avcodec.h