Stream structure. More...

#include <avformat.h>

Data Fields
int	index
	stream index in AVFormatContext

int	id
	Format-specific stream ID.

AVCodecContext *	codec
	Codec context associated with this stream.

void *	priv_data

struct AVFrac	pts
	encoding: pts generation when outputting stream

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

int64_t	start_time
	Decoding: pts of the first frame of the stream in presentation order, in stream time base.

int64_t	duration
	Decoding: duration of the stream, in stream time base.

int64_t	nb_frames
	number of frames in this stream if known or 0

int	disposition
	AV_DISPOSITION_* bit field.

enum AVDiscard	discard
	Selects which packets can be discarded at will and do not need to be demuxed.

AVRational	sample_aspect_ratio
	sample aspect ratio (0 if unknown)

AVDictionary *	metadata

AVRational	avg_frame_rate
	Average framerate.

AVPacket	attached_pic
	For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached picture.

struct {
int64_t last_dts

int64_t duration_gcd

int duration_count

double(* duration_error )[2][MAX_STD_TIMEBASES]

int64_t codec_info_duration

int64_t codec_info_duration_fields

int found_decoder

int64_t last_duration

int64_t fps_first_dts
	Those are used for average framerate estimation.

int fps_first_dts_idx

int64_t fps_last_dts

int fps_last_dts_idx

}	info

int	pts_wrap_bits
	number of bits in pts (used for wrapping control)

int64_t	reference_dts
	Timestamp corresponding to the last dts sync point.

int64_t	first_dts

int64_t	cur_dts

int64_t	last_IP_pts

int	last_IP_duration

int	probe_packets

int	codec_info_nb_frames
	Number of frames that have been demuxed during av_find_stream_info()

int	stream_identifier
	Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.

int64_t	interleaver_chunk_size

int64_t	interleaver_chunk_duration

enum AVStreamParseType	need_parsing

struct AVCodecParserContext *	parser

struct AVPacketList *	last_in_packet_buffer
	last packet in packet_buffer for this stream when muxing.

AVProbeData	probe_data

int64_t	pts_buffer [MAX_REORDER_DELAY+1]

AVIndexEntry *	index_entries
	Only used if the format does not support seeking natively.

int	nb_index_entries

unsigned int	index_entries_allocated_size

int	request_probe
	stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with request_probe being the minimum score to accept.

int	skip_to_keyframe
	Indicates that everything up to the next keyframe should be discarded.

int	skip_samples
	Number of samples to skip at the start of the frame decoded from the next packet.

int	nb_decoded_frames
	Number of internally decoded frames, used internally in libavformat, do not access its lifetime differs from info which is why it is not in that structure.

int64_t	mux_ts_offset
	Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.

int64_t	pts_wrap_reference
	Internal data to check for wrapping of the time stamp.

int	pts_wrap_behavior
	Options for behavior, when a wrap is detected.

Detailed Description

Stream 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. sizeof(AVStream) must not be used outside libav*.

Examples:: doc/examples/demuxing.c, and doc/examples/muxing.c.

Definition at line 646 of file avformat.h.

Field Documentation

int AVStream::index

stream index in AVFormatContext

Examples:: doc/examples/muxing.c.

Definition at line 647 of file avformat.h.

Referenced by aac_parse_packet(), add_av_stream1(), amr_handle_packet(), ape_tag_read_field(), asf_read_picture(), av_read_frame(), avformat_find_stream_info(), avformat_match_stream_specifier(), avformat_new_stream(), avpriv_dv_produce_packet(), avpriv_set_pts_info(), avs_read_audio_packet(), avs_read_video_packet(), build_feed_streams(), cdxl_read_packet(), check_output_constraints(), cin_read_header(), compute_pkt_fields2(), configure_input_audio_filter(), configure_input_video_filter(), dc1394_read_common(), decode_audio(), decode_video(), dshow_add_device(), dump_attachment(), dv_extract_audio_info(), ea_read_header(), ff_h263_handle_packet(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_rtsp_open_transport_ctx(), film_read_header(), flv_data_packet(), flv_read_packet(), fourxm_read_header(), get_attachment(), get_subtitle_pkt(), guess_input_channel_layout(), gxf_write_header(), gxf_write_media_preamble(), h263_handle_packet(), h264_handle_packet(), idcin_read_header(), init_input_filter(), init_input_stream(), ipmovie_read_header(), jpeg_parse_packet(), latm_parse_packet(), matroska_parse_frame(), matroska_parse_rm_audio(), mov_build_index(), mov_read_covr(), mov_read_trak(), mov_read_trun(), mov_seek_stream(), movie_common_init(), movie_push_frame(), mpeg_parse_packet(), mpegps_read_packet(), mpegts_set_stream_info(), mxf_parse_structural_metadata(), mxf_write_generic_desc(), mxf_write_header(), mxf_write_packet(), mxf_write_sequence(), mxf_write_structural_component(), mxf_write_timecode_component(), mxf_write_track(), new_audio_stream(), new_pes_packet(), nsv_read_chunk(), nuv_header(), open_input_file(), parse_packet(), parse_picture(), pmt_cb(), probe_codec(), process_input(), qdm2_restore_block(), qt_rtp_parse_packet(), rdt_load_mdpr(), rdt_parse_packet(), rdt_parse_sdp_line(), read_frame(), read_frame_internal(), return_stored_frame(), roq_read_packet(), rtp_parse_packet_internal(), seq_read_header(), show_stream(), smacker_read_header(), smjpeg_read_header(), smush_read_header(), store_packet(), str_read_packet(), svq3_parse_packet(), thp_read_header(), transcode_init(), vid_read_packet(), vmd_read_header(), vp8_handle_packet(), wc3_read_header(), write_audio_frame(), write_stream_data(), write_video_frame(), wsaud_read_packet(), wsvqa_read_header(), wsvqa_read_packet(), xa_read_packet(), xiph_handle_packet(), and xmv_read_header().

int AVStream::id

Format-specific stream ID.

decoding: set by libavformat encoding: set by the user, replaced by libavformat if left unset

Examples:: doc/examples/muxing.c.

Definition at line 653 of file avformat.h.

Referenced by add_dstream(), add_stream(), asf_read_stream_properties(), asfrtp_parse_packet(), asfrtp_parse_sdp_line(), avformat_match_stream_specifier(), avi_read_header(), avisynth_read_header(), build_feed_streams(), create_new_audio_stream(), dshow_add_device(), dump_stream_format(), ff_find_stream_index(), ff_rdt_parse_open(), ff_rm_parse_packet(), ff_rtp_chain_mux_open(), fourxm_read_header(), get_sindex(), handle_file(), hls_read_header(), lavfi_read_header(), mov_read_chapters(), mov_read_header(), mov_read_tkhd(), mov_read_trak(), mov_read_trun(), mpegps_read_dts(), mpegps_read_packet(), mpegps_read_pes_header(), mpegts_push_data(), mpegts_set_stream_info(), mpegts_write_header(), mxf_parse_structural_metadata(), new_output_stream(), new_stream(), nsv_parse_NSVs_header(), nsv_read_chunk(), ogg_new_stream(), open_slave(), pmt_cb(), rdt_parse_sdp_line(), read_header(), recheck_discard_flags(), rm_read_header(), rm_read_index(), rm_write_header(), rtp_write_header(), rtsp_read_packet(), sap_fetch_packet(), sap_read_header(), show_stream(), swf_read_packet(), and sync().

AVCodecContext* AVStream::codec

Codec context associated with this stream.

Allocated and freed by libavformat.

decoding: The demuxer exports codec information stored in the headers here.
encoding: The user sets codec information, the muxer writes it to the output. Mandatory fields as specified in AVCodecContext documentation must be set even if this AVCodecContext is not actually used for encoding.

Examples:: doc/examples/demuxing.c, doc/examples/filtering_audio.c, doc/examples/filtering_video.c, and doc/examples/muxing.c.

Definition at line 665 of file avformat.h.

Referenced by a64_write_header(), add_av_stream(), add_av_stream1(), add_codec(), add_dstream(), add_input_streams(), add_stream(), adts_aac_read_header(), adts_write_header(), adx_read_header(), adx_read_packet(), aea_read_header(), aea_read_packet(), afc_read_header(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_packet(), aiff_write_trailer(), amf_parse_object(), amr_handle_packet(), amr_read_header(), amr_read_packet(), apc_read_header(), ape_read_header(), ape_tag_read_field(), aqt_read_header(), asf_read_header(), asf_read_picture(), asf_read_stream_properties(), asf_write_header1(), asf_write_packet(), asfrtp_parse_sdp_line(), ass_read_header(), ast_read_header(), ast_read_packet(), ast_write_header(), ast_write_packet(), ast_write_trailer(), audio_decode_frame(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_find_default_stream_index(), av_guess_sample_aspect_ratio(), av_interleaved_write_frame(), avformat_find_stream_info(), avformat_match_stream_specifier(), avformat_new_stream(), avi_read_header(), avi_read_idx1(), 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(), avpriv_dv_produce_packet(), avpriv_set_pts_info(), avr_read_header(), avs_read_packet(), bfi_read_header(), bmv_read_header(), build_feed_streams(), build_file_streams(), build_frame_code(), caca_write_header(), caf_write_header(), caf_write_packet(), caf_write_trailer(), cdata_read_header(), cdxl_read_packet(), celt_header(), check_keyboard_interaction(), check_recording_time(), choose_decoder(), choose_encoder(), choose_pix_fmts(), choose_pixel_fmt(), choose_sample_fmt(), cin_read_header(), close_audio(), close_connection(), close_input_file(), close_output_stream(), close_video(), compute_bandwidth(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), concat_read_header(), configure_input_audio_filter(), configure_input_video_filter(), configure_output_audio_filter(), configure_output_video_filter(), create_audio_stream(), create_new_audio_stream(), create_stream(), daud_header(), daud_write_header(), dc1394_read_common(), decode_audio(), decode_stream_header(), decode_video(), dfa_read_header(), dirac_header(), do_audio_out(), do_streamcopy(), do_subtitle_out(), do_video_out(), do_video_stats(), dshow_add_device(), dtshd_read_header(), dump_attachment(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_extract_video_info(), dv_frame_offset(), dv_init_mux(), dxa_read_header(), ea_read_header(), epaf_read_header(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), export_orphan_timecode(), extract_mpeg4_header(), fbdev_read_header(), ff_alsa_open(), ff_asf_parse_packet(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_choose_timebase(), ff_compute_frame_duration(), ff_dv_offset_reset(), ff_framehash_write_header(), ff_free_stream(), ff_generate_avci_extradata(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_interleave_add_packet(), ff_interleave_compare_dts(), ff_interleave_packet_per_dts(), ff_load_image(), ff_mov_read_chan(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ff_pcm_read_packet(), ff_pcm_read_seek(), ff_raw_audio_read_header(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rm_retrieve_cache(), ff_rtp_chain_mux_open(), ff_rtp_parse_open(), ff_rtp_send_aac(), ff_rtp_send_jpeg(), ff_rtp_send_latm(), ff_sauce_read(), ff_spdif_read_packet(), ff_voc_get_packet(), ffm2_read_header(), ffm_close(), ffm_read_header(), ffm_write_header(), film_read_header(), filter_codec_opts(), find_stream(), find_stream_in_feed(), flac_header(), flac_read_header(), flac_write_header(), flac_write_trailer(), flush_encoders(), flv_data_packet(), flv_get_extradata(), flv_read_metabody(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), force_codec_ids(), fourxm_read_header(), frm_read_header(), frm_read_packet(), g722_read_header(), g723_1_init(), g729_read_header(), g729_read_packet(), get_aiff_header(), get_attachment(), get_codec_data(), get_packet_header(), get_private_data(), get_sindex(), get_video_frame(), gif_read_header(), gif_write_header(), gif_write_packet(), grab_read_header(), gsm_read_header(), guess_channel_layout(), guess_input_channel_layout(), gxf_compare_field_nb(), gxf_find_lines_index(), gxf_interleave_packet(), gxf_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_mpeg_auxiliary(), gxf_write_packet(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), handle_file(), has_codec_parameters(), has_decode_delay_been_guessed(), hls_mux_init(), hls_read_header(), hls_write_header(), hls_write_packet(), http_prepare_data(), http_receive_data(), ico_write_header(), ico_write_packet(), ico_write_trailer(), idcin_read_header(), iff_read_header(), iff_read_packet(), ilbc_parse_fmtp(), ilbc_parse_sdp_line(), ilbc_read_header(), ilbc_read_packet(), ilbc_write_header(), img_read_header(), img_read_packet(), init_input_filter(), init_input_stream(), init_muxer(), init_pts(), init_stream(), ipmovie_read_header(), ircam_read_header(), ircam_write_header(), ism_write_header(), ism_write_packet(), iss_read_header(), iss_read_packet(), ivf_write_header(), jacosub_read_header(), jacosub_write_header(), latm_write_frame_header(), latm_write_header(), latm_write_packet(), lavfi_read_header(), lmlm4_read_header(), loas_read_header(), lvf_read_header(), lxf_read_header(), m4sl_cb(), main(), matroska_parse_block(), matroska_parse_frame(), matroska_parse_rm_audio(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_header(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), modify_current_stream(), modplug_read_header(), mov_build_index(), mov_create_timecode_track(), mov_read_close(), mov_read_covr(), mov_read_dac3(), mov_read_dec3(), mov_read_dvc1(), mov_read_enda(), mov_read_extradata(), mov_read_fiel(), mov_read_glbl(), mov_read_hdlr(), mov_read_header(), mov_read_strf(), mov_read_trak(), mov_read_trun(), mov_read_wave(), mov_read_wfex(), mov_write_ftyp_tag(), mov_write_header(), mov_write_moov_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), movie_common_init(), movie_config_output_props(), movie_push_frame(), movie_query_formats(), movie_uninit(), mp3_parse_vbr_tags(), mp3_read_header(), mp3_write_xing(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), mpeg_parse_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mxf_get_d10_aes3_packet(), mxf_handle_small_eubc(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_read_packet(), mxf_read_packet_old(), mxf_read_seek(), mxf_write_cdci_common(), mxf_write_common_fields(), mxf_write_d10_audio_packet(), mxf_write_d10_video_packet(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_identification(), mxf_write_mpegvideo_desc(), mxf_write_packet(), mxf_write_wav_common(), mxg_read_header(), nc_read_header(), new_audio_stream(), new_output_stream(), new_stream(), new_subtitle_stream(), new_video_stream(), nist_read_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_close(), nut_read_header(), nut_write_header(), nuv_header(), ogg_buffer_data(), ogg_read_seek(), ogg_validate_keyframe(), ogg_write_header(), ogg_write_packet(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), oma_read_packet(), oma_write_header(), open_audio(), open_codec_context(), open_input_file(), open_input_stream(), open_output_file(), open_slave(), open_stream(), open_video(), opt_map_channel(), opt_target(), opus_header(), output_packet(), parse_audio_var(), parse_fmtp(), parse_fmtp_config(), parse_h264_sdp_line(), parse_media_type(), parse_mpeg1waveformatex(), parse_packet(), parse_picture(), parse_timecode_in_framenum_format(), parse_video_var(), pcm_read_header(), pjs_read_header(), pmp_header(), pmt_cb(), prepare_sdp_description(), print_report(), probe_codec(), process_frame(), process_input(), pulse_read_header(), put_frame(), pva_read_header(), pvf_read_header(), qcp_read_header(), qdm2_parse_config(), qdm2_parse_packet(), qt_rtp_parse_packet(), r3d_read_red1(), r3d_read_reda(), rawvideo_read_header(), rawvideo_read_packet(), rdt_parse_packet(), read_desc_chunk(), read_ffserver_streams(), read_frame(), read_frame_internal(), read_gab2_sub(), read_header(), read_index(), read_kuki_chunk(), read_packet(), read_seek(), read_thread(), real_parse_asm_rule(), realtext_read_header(), reap_filters(), report_new_stream(), rewind_file(), rl2_read_header(), rm_ac3_swap_bytes(), 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(), rso_write_header(), rtp_parse_one_packet(), rtp_parse_packet_internal(), rtp_parse_queued_packet(), rtp_send_ilbc(), rtp_write_header(), rtp_write_packet(), sami_read_header(), sap_fetch_packet(), sap_read_header(), sbg_read_header(), sbg_read_packet(), sdl_write_header(), sdl_write_packet(), sdp_parse_fmtp_config_h264(), seek_frame_generic(), seg_write_header(), segment_mux_init(), select_reference_stream(), seq_read_header(), set_channels(), set_codec_from_probe_data(), setup_find_stream_info_opts(), show_frame(), show_packet(), show_stream(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smjpeg_write_packet(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), sox_write_trailer(), spdif_write_header(), speex_header(), srt_read_header(), srt_write_header(), srt_write_packet(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), sub2video_prepare(), subtitle_thread(), subviewer1_read_header(), subviewer_read_header(), svq3_parse_packet(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), tak_read_header(), tedcaptions_read_header(), theora_header(), thp_read_header(), tmcd_is_referenced(), tmv_read_header(), transcode(), transcode_init(), transcode_subtitles(), try_decode_frame(), tta_read_header(), txd_read_header(), update_initial_durations(), update_initial_timestamps(), update_stream_timings(), v4l2_read_header(), v4l2_read_packet(), validate_codec_tag(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_packet(), video_refresh(), video_thread(), vivo_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), voc_write_packet(), vorbis_header(), vplayer_read_header(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), webvtt_read_header(), write_audio_frame(), write_frame(), write_header(), write_manifest(), write_packet(), write_stream_codec(), write_stream_codec_info(), write_stream_data(), write_streamheader(), write_streaminfo(), write_timestamp(), write_trailer(), write_video_frame(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), x11grab_read_header(), xa_read_header(), xa_read_packet(), xiph_parse_fmtp_pair(), xmv_process_packet_header(), xmv_read_header(), xwma_read_header(), xwma_read_packet(), yop_read_header(), yuv4_read_header(), and yuv4_read_packet().

void* AVStream::priv_data

Definition at line 677 of file avformat.h.

Referenced by add_av_stream1(), asf_read_pts(), asf_read_stream_properties(), asf_reset_header(), av_write_trailer(), avi_read_close(), avi_read_header(), avi_read_idx1(), avi_read_packet(), avi_read_seek(), avi_start_new_riff(), avi_sync(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), clean_index(), ff_asf_parse_packet(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_free_stream(), ff_interleave_new_audio_packet(), ff_mov_read_stsd_entries(), flush_packet(), flv_write_header(), flv_write_packet(), flv_write_trailer(), get_subtitle_pkt(), get_system_header_size(), gxf_compare_field_nb(), gxf_find_lines_index(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_mpeg_auxiliary(), gxf_write_track_description_section(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), gxf_write_umf_track_description(), http_prepare_data(), mov_build_index(), mov_find_next_sample(), mov_read_chapters(), mov_read_close(), mov_read_covr(), mov_read_ctts(), mov_read_custom_metadata(), mov_read_dref(), mov_read_elst(), mov_read_header(), mov_read_mdhd(), mov_read_packet(), mov_read_sbgp(), mov_read_seek(), mov_read_stco(), mov_read_stps(), mov_read_stsc(), mov_read_stss(), mov_read_stsz(), mov_read_stts(), mov_read_timecode_track(), mov_read_tkhd(), mov_read_tmcd(), mov_read_trak(), mov_read_trun(), mov_seek_stream(), mpeg_mux_end(), mpeg_mux_init(), mpeg_mux_write_packet(), mpegts_get_pcr(), mpegts_insert_pcr_only(), mpegts_set_stream_info(), mpegts_write_end(), mpegts_write_flush(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mxf_compare_timestamps(), mxf_compute_sample_count(), mxf_free(), mxf_get_stream_index(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_read_close(), mxf_read_packet_old(), mxf_read_seek(), mxf_set_audio_pts(), mxf_write_cdci_common(), mxf_write_essence_container_refs(), mxf_write_footer(), mxf_write_generic_desc(), mxf_write_header(), mxf_write_index_table_segment(), mxf_write_multi_descriptor(), mxf_write_package(), mxf_write_packet(), mxf_write_system_item(), mxf_write_track(), new_stream(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_close(), nsv_read_seek(), ogg_buffer_data(), ogg_compare_granule(), ogg_write_header(), ogg_write_packet(), ogg_write_page(), ogg_write_pages(), ogg_write_trailer(), output_packet(), parse_chunks(), put_system_header(), qt_rtp_parse_packet(), read_braindead_odml_indx(), read_gab2_sub(), remove_decoded_packets(), rm_read_close(), rm_read_header(), rm_read_header_old(), rm_read_packet(), rtp_new_av_stream(), sap_write_close(), sap_write_header(), sap_write_packet(), seek_subtitle(), and tmcd_is_referenced().

struct AVFrac AVStream::pts

encoding: pts generation when outputting stream

Examples:: doc/examples/muxing.c.

Definition at line 682 of file avformat.h.

Referenced by compute_pkt_fields2(), do_video_stats(), init_pts(), main(), and print_report().

AVRational AVStream::time_base

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

decoding: set by libavformat encoding: set by libavformat in avformat_write_header. The muxer may use the user-provided value of codec->time_base as a hint.

Examples:: doc/examples/filtering_audio.c, and doc/examples/muxing.c.

Definition at line 693 of file avformat.h.

Referenced by audio_decode_frame(), av_pkt_dump2(), av_pkt_dump_log2(), avformat_find_stream_info(), avformat_seek_file(), avi_read_packet(), avi_read_seek(), avpriv_set_pts_info(), choose_output(), compute_pkt_fields(), compute_pkt_fields2(), concat_read_header(), concat_read_packet(), configure_input_video_filter(), decode_audio(), decode_video(), do_audio_out(), do_streamcopy(), do_subtitle_out(), do_video_out(), dump_stream_format(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), ff_compute_frame_duration(), ff_framehash_write_header(), ff_gen_syncpoint_search(), ff_interleave_add_packet(), ff_interleave_compare_dts(), ff_interleave_new_audio_packet(), ff_interleave_packet_per_dts(), ff_mov_init_hinting(), ff_pcm_read_seek(), ff_read_packet(), ff_update_cur_dts(), ff_write_chained(), fill_all_stream_timings(), finalize_packet(), flac_read_header(), flush_encoders(), get_subtitle_pkt(), get_video_frame(), guess_ni_flag(), handle_file(), hls_read_header(), hls_read_packet(), hls_read_seek(), hls_write_packet(), http_prepare_data(), init_filters(), init_pts(), init_stream(), ism_write_header(), ism_write_packet(), ivf_write_header(), main(), mov_read_chapters(), mov_read_seek(), mov_write_single_packet(), movie_config_output_props(), mp3_parse_vbr_tags(), mxf_compute_sample_count(), mxf_parse_structural_metadata(), mxf_read_seek(), nut_read_header(), ogg_buffer_data(), ogg_compare_granule(), open_slave(), output_packet(), parse_packet(), print_report(), process_input(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_reda(), r3d_read_redv(), r3d_seek(), read_gab2_sub(), read_header(), read_seek(), read_thread(), report_new_stream(), rl2_read_seek(), rtp_parse_one_packet(), rtsp_read_play(), rtsp_read_seek(), sap_fetch_packet(), sap_read_header(), sbg_read_seek2(), search_hi_lo_keyframes(), seek_frame_internal(), seek_subtitle(), seg_write_packet(), show_frame(), show_packet(), show_stream(), sub2video_heartbeat(), sub2video_update(), subtitle_thread(), tee_write_packet(), transcode_init(), update_stream_timings(), update_wrap_reference(), vc1t_read_packet(), video_thread(), vqf_read_seek(), and write_frame().

int64_t AVStream::start_time

Decoding: pts of the first frame of the stream in presentation order, in stream time base.

Only set this if you are absolutely 100% sure that the value you set it to really is the pts of the first frame. This may be undefined (AV_NOPTS_VALUE).

Note: The ASF header does NOT contain a correct start_time the ASF demuxer must NOT set this.

Definition at line 703 of file avformat.h.

Referenced by aiff_read_header(), ape_read_header(), ast_read_header(), avformat_new_stream(), avi_read_header(), avisynth_read_header(), avpriv_dv_init_demux(), cdxl_read_packet(), create_audio_stream(), do_video_out(), dv_extract_audio_info(), ea_read_header(), estimate_timings_from_pts(), ff_raw_audio_read_header(), fill_all_stream_timings(), g723_1_init(), gxf_header(), gxf_seek(), hls_read_packet(), idcin_read_header(), ilbc_read_header(), img_read_header(), matroska_read_header(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpegts_read_header(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nut_read_header(), ogg_get_length(), ogg_read_header(), oma_read_header(), open_slave(), opus_packet(), process_input(), read_header(), read_thread(), rm_read_header(), sbg_read_header(), sbg_read_packet(), seq_read_header(), show_stream(), skeleton_header(), smush_read_header(), str_read_packet(), tak_read_header(), tedcaptions_read_header(), theora_packet(), tta_read_header(), update_initial_timestamps(), update_stream_timings(), vid_read_packet(), vivo_read_header(), vorbis_packet(), vqf_read_header(), wsvqa_read_header(), wv_read_header(), and xa_read_header().

int64_t AVStream::duration

Decoding: duration of the stream, in stream time base.

If a source file does not specify a duration, but does specify a bitrate, this value will be estimated from bitrate and file size.

Definition at line 710 of file avformat.h.

Referenced by afc_read_header(), aiff_read_header(), ape_read_header(), asf_read_stream_properties(), ast_read_header(), avformat_new_stream(), avi_read_header(), avisynth_read_header(), bfi_read_header(), dfa_read_header(), ea_read_header(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), fill_all_stream_timings(), flac_read_header(), gxf_header(), has_duration(), img_read_header(), ivf_write_header(), lxf_read_header(), modplug_read_header(), mov_build_index(), mov_read_chapters(), mov_read_header(), mov_read_mdhd(), mov_read_packet(), mov_read_stts(), mov_read_trak(), mov_read_trun(), mp3_parse_vbr_tags(), mpc8_read_header(), mpc_read_header(), mxf_compute_index_tables(), mxf_parse_structural_metadata(), mxf_read_packet(), nist_read_header(), nsv_parse_NSVs_header(), nut_read_header(), ogg_get_length(), open_slave(), parse_video_var(), pmp_header(), r3d_read_rdvo(), read_header(), read_packet(), read_pakt_chunk(), read_seek(), rm_read_header(), rso_read_header(), sbg_read_header(), sbg_read_packet(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), smush_read_header(), tak_read_header(), tedcaptions_read_header(), theora_packet(), thp_read_header(), tta_read_header(), update_stream_timings(), vc1t_read_header(), vorbis_packet(), wsvqa_read_header(), wv_read_header(), xmv_read_header(), and xwma_read_header().

int64_t AVStream::nb_frames

number of frames in this stream if known or 0

Definition at line 712 of file avformat.h.

Referenced by aiff_read_header(), aiff_write_packet(), ape_read_header(), av_interleaved_write_frame(), av_write_frame(), av_write_trailer(), avi_read_header(), avs_read_packet(), bfi_read_header(), do_video_stats(), ea_read_header(), ff_mov_write_packet(), flv_write_packet(), mkv_write_ass_blocks(), mov_read_stts(), mov_read_trak(), mv_read_header(), open_slave(), parse_audio_var(), parse_video_var(), pmp_header(), read_header(), read_index(), read_pakt_chunk(), show_stream(), siff_parse_vbv1(), smush_read_header(), thp_read_header(), and wsvqa_read_header().

int AVStream::disposition

AV_DISPOSITION_* bit field.

Definition at line 714 of file avformat.h.

Referenced by ape_tag_read_field(), asf_read_picture(), av_find_best_stream(), av_find_default_stream_index(), avformat_find_stream_info(), avformat_queue_attached_pictures(), dump_stream_format(), ff_id3v2_parse_apic(), ff_parse_mpeg2_descriptor(), get_attachment(), matroska_read_header(), mkv_write_tracks(), mov_read_covr(), mpegts_write_pmt(), open_output_file(), open_slave(), parse_chunks(), parse_picture(), select_reference_stream(), set_disposition_bits(), transcode_init(), and write_streaminfo().

enum AVDiscard AVStream::discard

Selects which packets can be discarded at will and do not need to be demuxed.

Definition at line 716 of file avformat.h.

Referenced by add_input_streams(), avformat_queue_attached_pictures(), avi_sync(), avisynth_read_packet(), decode_frame(), ff_asf_parse_packet(), ff_gen_syncpoint_search(), find_stream(), flv_read_packet(), get_subtitle_pkt(), init_input_filter(), matroska_parse_block(), mov_read_chapters(), mov_read_packet(), movie_common_init(), mpegps_read_packet(), mpegts_push_data(), mxf_read_packet_old(), new_output_stream(), open_output_file(), process_input(), r3d_read_packet(), read_data(), read_frame_internal(), read_thread(), recheck_discard_flags(), rm_read_packet(), rtsp_read_packet(), search_hi_lo_keyframes(), stream_component_close(), and stream_component_open().

AVRational AVStream::sample_aspect_ratio

sample aspect ratio (0 if unknown)

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

Definition at line 723 of file avformat.h.

Referenced by add_av_stream1(), asf_read_frame_header(), asf_read_header(), av_guess_sample_aspect_ratio(), avformat_new_stream(), avi_read_header(), avi_write_header(), concat_read_header(), configure_input_video_filter(), decode_stream_header(), decode_video(), dump_stream_format(), dv_extract_video_info(), ff_rtp_chain_mux_open(), has_codec_parameters(), hls_mux_init(), iff_read_header(), init_muxer(), ism_write_header(), lavfi_read_header(), matroska_read_header(), mkv_write_tracks(), mov_read_pasp(), mov_read_tkhd(), mov_read_trak(), mov_write_tkhd_tag(), mov_write_trak_tag(), movie_push_frame(), new_video_stream(), nut_read_header(), nuv_header(), open_slave(), parse_video_var(), read_header(), sdl_write_header(), segment_mux_init(), theora_header(), transcode_init(), write_streamheader(), yop_read_header(), and yuv4_read_header().

AVDictionary* AVStream::metadata

Definition at line 725 of file avformat.h.

Referenced by ape_tag_read_field(), asf_read_header(), asf_read_picture(), avi_read_tag(), avi_write_header(), celt_header(), copy_metadata(), decode_info_header(), dump_attachment(), dump_stream_format(), dv_write_header(), export_orphan_timecode(), ff_free_stream(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_metadata_conv_ctx(), ff_parse_mpeg2_descriptor(), flac_header(), get_attachment(), gxf_write_header(), hls_read_header(), matroska_read_header(), mkv_write_attachments(), mkv_write_tags(), mkv_write_tracks(), mov_read_hdlr(), mov_read_header(), mov_read_mdhd(), mov_read_tkhd(), mov_write_header(), mov_write_tkhd_tag(), mpegts_write_pmt(), mxf_write_header(), ogm_header(), open_output_file(), open_slave(), opus_header(), parse_chunks(), parse_picture(), parse_timecode_in_framenum_format(), r3d_read_red1(), read_gab2_sub(), read_header(), show_stream(), speex_header(), theora_header(), vorbis_header(), write_streaminfo(), write_table_entries_attrib(), write_table_redirector_legacy_attrib(), and write_trailer().

AVRational AVStream::avg_frame_rate

AVPacket AVStream::attached_pic

For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached picture.

decoding: set by libavformat, must not be modified by the caller. encoding: unused

Definition at line 739 of file avformat.h.

Referenced by ape_tag_read_field(), asf_read_picture(), avformat_queue_attached_pictures(), ff_free_stream(), ff_id3v2_parse_apic(), get_attachment(), mov_read_covr(), and parse_picture().

int64_t AVStream::last_dts

Definition at line 754 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int64_t AVStream::duration_gcd

Definition at line 755 of file avformat.h.

Referenced by avformat_find_stream_info().

int AVStream::duration_count

Definition at line 756 of file avformat.h.

Referenced by avformat_find_stream_info().

double(* AVStream::duration_error)[2][MAX_STD_TIMEBASES]

Definition at line 757 of file avformat.h.

Referenced by avformat_find_stream_info(), avi_read_header(), and ff_free_stream().

int64_t AVStream::codec_info_duration

Definition at line 758 of file avformat.h.

Referenced by avformat_find_stream_info().

int64_t AVStream::codec_info_duration_fields

Definition at line 759 of file avformat.h.

Referenced by avformat_find_stream_info().

int AVStream::found_decoder

Definition at line 760 of file avformat.h.

Referenced by avformat_find_stream_info(), has_codec_parameters(), and try_decode_frame().

int64_t AVStream::last_duration

Definition at line 762 of file avformat.h.

Referenced by estimate_timings_from_pts().

int64_t AVStream::fps_first_dts

Those are used for average framerate estimation.

Definition at line 767 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int AVStream::fps_first_dts_idx

Definition at line 768 of file avformat.h.

Referenced by avformat_find_stream_info().

int64_t AVStream::fps_last_dts

Definition at line 769 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int AVStream::fps_last_dts_idx

Definition at line 770 of file avformat.h.

Referenced by avformat_find_stream_info().

struct { ... } * AVStream::info

Referenced by avformat_find_stream_info(), avformat_new_stream(), avi_read_header(), estimate_timings_from_pts(), ff_free_stream(), has_codec_parameters(), has_decode_delay_been_guessed(), read_ffserver_streams(), and try_decode_frame().

int AVStream::pts_wrap_bits

number of bits in pts (used for wrapping control)

Definition at line 774 of file avformat.h.

Referenced by av_read_frame(), avpriv_set_pts_info(), compute_pkt_fields(), hls_read_header(), process_input(), update_wrap_reference(), and wrap_timestamp().

int64_t AVStream::reference_dts

Timestamp corresponding to the last dts sync point.

Initialized when AVCodecParserContext.dts_sync_point >= 0 and a DTS is received from the underlying container. Otherwise set to AV_NOPTS_VALUE by default.

Definition at line 784 of file avformat.h.

Referenced by avformat_new_stream(), compute_pkt_fields(), estimate_timings_from_pts(), ff_read_frame_flush(), ff_restore_parser_state(), and ff_store_parser_state().

int64_t AVStream::first_dts

Definition at line 785 of file avformat.h.

Referenced by add_dstream(), avformat_find_stream_info(), avformat_new_stream(), do_video_out(), estimate_timings_from_pts(), ff_read_frame_flush(), ism_write_packet(), rdt_parse_sdp_line(), update_initial_durations(), update_initial_timestamps(), and update_wrap_reference().

int64_t AVStream::cur_dts

int64_t AVStream::last_IP_pts

Definition at line 787 of file avformat.h.

Referenced by avformat_new_stream(), compute_pkt_fields(), decode_frame(), estimate_timings_from_pts(), ff_read_frame_flush(), ff_restore_parser_state(), and ff_store_parser_state().

int AVStream::last_IP_duration

Definition at line 788 of file avformat.h.

Referenced by compute_pkt_fields().

int AVStream::probe_packets

Definition at line 794 of file avformat.h.

Referenced by avformat_new_stream(), ff_read_frame_flush(), ff_read_packet(), ff_restore_parser_state(), ff_store_parser_state(), probe_codec(), sbg_read_header(), set_codec_from_probe_data(), and tedcaptions_read_header().

int AVStream::codec_info_nb_frames

Number of frames that have been demuxed during av_find_stream_info()

Definition at line 799 of file avformat.h.

Referenced by av_find_best_stream(), avformat_find_stream_info(), dump_stream_format(), has_codec_parameters(), and try_decode_frame().

int AVStream::stream_identifier

Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.

Definition at line 806 of file avformat.h.

Referenced by ff_parse_mpeg2_descriptor().

int64_t AVStream::interleaver_chunk_size

Definition at line 808 of file avformat.h.

Referenced by ff_interleave_add_packet().

int64_t AVStream::interleaver_chunk_duration

Definition at line 809 of file avformat.h.

Referenced by ff_interleave_add_packet().

enum AVStreamParseType AVStream::need_parsing

Definition at line 812 of file avformat.h.

Referenced by adts_aac_read_header(), asf_read_stream_properties(), avformat_find_stream_info(), avi_read_header(), compute_pkt_fields(), create_new_audio_stream(), dtshd_read_header(), ea_read_header(), ff_mov_read_stsd_entries(), ff_parse_mpeg2_descriptor(), ff_raw_audio_read_header(), ff_raw_video_read_header(), ff_rm_read_mdpr_codecdata(), film_read_header(), flac_header(), flac_read_header(), flv_set_audio_codec(), get_codec_data(), get_sindex(), h263_init(), h264_init(), img_read_header(), init_video(), lmlm4_read_header(), loas_read_header(), m4sl_cb(), matroska_read_header(), mp3_read_header(), mpeg_init(), mpegps_read_packet(), mpegts_set_stream_info(), mtv_read_header(), mxf_parse_structural_metadata(), nc_read_header(), new_stream(), nsv_parse_NSVs_header(), nsv_read_chunk(), ogm_header(), oma_read_header(), parse_packet(), pva_read_header(), read_frame_internal(), read_header(), rm_read_audio_stream_info(), tak_read_header(), theora_header(), xiph_vorbis_init(), and xwma_read_header().

struct AVCodecParserContext* AVStream::parser

Definition at line 813 of file avformat.h.

Referenced by avformat_find_stream_info(), estimate_timings_from_pts(), ff_free_stream(), ff_read_frame_flush(), ff_restore_parser_state(), ff_store_parser_state(), output_packet(), parse_packet(), and read_frame_internal().

struct AVPacketList* AVStream::last_in_packet_buffer

last packet in packet_buffer for this stream when muxing.

Definition at line 818 of file avformat.h.

Referenced by ff_interleave_add_packet(), ff_interleave_packet_per_dts(), and mxf_interleave_get_packet().

AVProbeData AVStream::probe_data

Definition at line 819 of file avformat.h.

Referenced by ff_free_stream(), and probe_codec().

int64_t AVStream::pts_buffer[MAX_REORDER_DELAY+1]

Definition at line 821 of file avformat.h.

Referenced by avformat_new_stream(), compute_pkt_fields(), compute_pkt_fields2(), and ff_read_frame_flush().

AVIndexEntry* AVStream::index_entries

Only used if the format does not support seeking natively.

Definition at line 823 of file avformat.h.

Referenced by ape_read_seek(), asf_read_seek(), av_add_index_entry(), av_index_search_timestamp(), av_write_trailer(), avi_read_idx1(), avi_read_packet(), avi_read_seek(), avi_sync(), clean_index(), clear_index_entries(), ff_free_stream(), ff_reduce_index(), ff_seek_frame_binary(), guess_ni_flag(), gxf_seek(), matroska_read_seek(), mov_build_index(), mov_find_next_sample(), mov_read_chapters(), mov_read_packet(), mov_read_seek(), mov_read_timecode_track(), mp3_seek(), mpc8_read_seek(), mpc_read_seek(), mv_read_packet(), nsv_read_seek(), nut_write_packet(), read_header(), read_packet(), read_seek(), rl2_read_packet(), rl2_read_seek(), rpl_read_packet(), seek_frame_generic(), tta_read_packet(), tta_read_seek(), and wv_read_seek().

int AVStream::nb_index_entries

unsigned int AVStream::index_entries_allocated_size

Definition at line 826 of file avformat.h.

Referenced by av_add_index_entry(), and mov_build_index().

int AVStream::request_probe

stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with request_probe being the minimum score to accept.

NOT PART OF PUBLIC API

Definition at line 835 of file avformat.h.

Referenced by asf_read_stream_properties(), avformat_find_stream_info(), avi_read_header(), ff_parse_mpeg2_descriptor(), ff_read_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), probe_codec(), and set_codec_from_probe_data().

int AVStream::skip_to_keyframe

Indicates that everything up to the next keyframe should be discarded.

Definition at line 840 of file avformat.h.

Referenced by matroska_parse_block(), matroska_read_seek(), and read_frame_internal().

int AVStream::skip_samples

Number of samples to skip at the start of the frame decoded from the next packet.

Definition at line 845 of file avformat.h.

Referenced by av_read_frame(), mov_read_header(), mov_read_seek(), mp3_parse_vbr_tags(), and mp3_seek().

int AVStream::nb_decoded_frames

Number of internally decoded frames, used internally in libavformat, do not access its lifetime differs from info which is why it is not in that structure.

Definition at line 851 of file avformat.h.

Referenced by has_codec_parameters(), has_decode_delay_been_guessed(), and try_decode_frame().

int64_t AVStream::mux_ts_offset

Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.

Definition at line 857 of file avformat.h.

Referenced by ff_interleave_packet_per_dts().

int64_t AVStream::pts_wrap_reference

Internal data to check for wrapping of the time stamp.

Definition at line 862 of file avformat.h.

Referenced by avformat_new_stream(), update_wrap_reference(), and wrap_timestamp().

int AVStream::pts_wrap_behavior

Options for behavior, when a wrap is detected.

Defined by AV_PTS_WRAP_ values.

If correction is enabled, there are two possibilities: If the first time stamp is near the wrap point, the wrap offset will be subtracted, which will create negative time stamps. Otherwise the offset will be added.

Definition at line 874 of file avformat.h.

Referenced by avformat_new_stream(), update_initial_timestamps(), update_wrap_reference(), and wrap_timestamp().

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

libavformat/avformat.h

Data Fields

Detailed Description

Field Documentation