AVStream Struct Reference

Stream structure. More...

#include <avformat.h>


Data Fields

int index
 stream index in AVFormatContext
int id
 format-specific stream ID
AVCodecContextcodec
 codec context
AVRational r_frame_rate
 Real base framerate of the stream.
void * priv_data
int64_t first_dts
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.
int pts_wrap_bits
 number of bits in pts (used for wrapping control)
int stream_copy
 If set, just copy stream.
enum AVDiscard discard
 Selects which packets can be discarded at will and do not need to be demuxed.
float quality
 Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
int64_t start_time
 Decoding: pts of the first frame of the stream, in stream time base.
int64_t duration
 Decoding: duration of the stream, in stream time base.
attribute_deprecated char language [4]
 ISO 639-2/B 3-letter language code (empty string if undefined).
enum AVStreamParseType need_parsing
struct AVCodecParserContextparser
int64_t cur_dts
int last_IP_duration
int64_t last_IP_pts
AVIndexEntryindex_entries
 Only used if the format does not support seeking natively.
int nb_index_entries
unsigned int index_entries_allocated_size
int64_t nb_frames
 number of frames in this stream if known or 0
attribute_deprecated int64_t unused [4+1]
attribute_deprecated char * filename
 source filename of the stream
int disposition
 AV_DISPOSITION_* bit field.
AVProbeData probe_data
int64_t pts_buffer [MAX_REORDER_DELAY+1]
AVRational sample_aspect_ratio
 sample aspect ratio (0 if unknown)
  • encoding: Set by user.

AVMetadatametadata
const uint8_t * cur_ptr
int cur_len
AVPacket cur_pkt
int64_t reference_dts
 Timestamp corresponding to the last dts sync point.
int probe_packets
struct AVPacketListlast_in_packet_buffer
 last packet in packet_buffer for this stream when muxing.
AVRational avg_frame_rate
 Average framerate.
int codec_info_nb_frames
 Number of frames that have been demuxed during av_find_stream_info().
struct {
   int64_t   last_dts
   int64_t   duration_gcd
   int   duration_count
   double   duration_error [MAX_STD_TIMEBASES]
   int64_t   codec_info_duration
info


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*.

Definition at line 489 of file avformat.h.


Field Documentation

stream index in AVFormatContext

Definition at line 490 of file avformat.h.

Referenced by aac_parse_packet(), add_av_stream1(), amr_handle_packet(), av_new_stream(), av_read_frame_internal(), av_read_packet(), av_set_pts_info(), avs_read_audio_packet(), avs_read_video_packet(), build_feed_streams(), cin_read_header(), compute_pkt_fields2(), dc1394_read_common(), dv_extract_audio_info(), ea_read_header(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), film_read_header(), flic_read_header(), flv_read_packet(), fourxm_read_header(), get_subtitle_pkt(), gxf_write_header(), gxf_write_media_preamble(), h263_handle_packet(), h264_handle_packet(), idcin_read_header(), ipmovie_read_header(), latm_parse_packet(), matroska_parse_block(), mov_build_index(), mov_read_trak(), mov_read_trun(), mov_seek_stream(), 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_pes_packet(), nsv_read_chunk(), open_input_file(), pmt_cb(), qdm2_restore_block(), qt_rtp_parse_packet(), rdt_load_mdpr(), rdt_parse_packet(), rdt_parse_sdp_line(), return_stored_frame(), roq_read_header(), roq_read_packet(), rtp_parse_packet_internal(), rtsp_open_transport_ctx(), seq_read_header(), show_stream(), smacker_read_header(), store_packet(), str_read_packet(), svq3_parse_packet(), thp_read_header(), vmd_read_header(), vp8_handle_packet(), wc3_read_header(), write_audio_frame(), write_video_frame(), wsaud_read_header(), wsvqa_read_header(), xa_read_packet(), and xiph_handle_packet().

codec context

Definition at line 492 of file avformat.h.

Referenced by a64_write_header(), a64_write_packet(), add_audio_stream(), add_av_stream(), add_av_stream1(), add_codec(), add_dstream(), add_video_stream(), adts_aac_read_header(), adts_write_header(), aea_read_header(), aea_read_packet(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_trailer(), amf_parse_object(), amr_handle_packet(), amr_read_header(), amr_read_packet(), apc_read_header(), ape_read_header(), applehttp_read_header(), asf_read_close(), asf_read_header(), asf_read_stream_properties(), asf_write_header1(), asf_write_packet(), asfrtp_parse_sdp_line(), au_read_header(), au_read_packet(), audio_decode_frame(), audio_read_header(), audio_read_packet(), audio_write_header(), av_estimate_timings_from_bit_rate(), av_estimate_timings_from_pts(), av_find_best_stream(), av_find_default_stream_index(), av_find_stream_info(), av_interleaved_write_frame(), av_new_stream(), av_open_input_stream(), av_read_frame_internal(), av_read_packet(), av_write_header(), avformat_free_context(), avi_read_close(), avi_read_header(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), avisynth_read_header(), avs_read_packet(), bfi_read_header(), build_feed_streams(), build_file_streams(), build_frame_code(), cdata_read_header(), check_audio_video_sub_inputs(), choose_pixel_fmt(), choose_sample_fmt(), choose_sample_rate(), cin_read_header(), close_audio(), close_connection(), close_video(), compute_bandwidth(), compute_frame_duration(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), create_audio_stream(), create_stream(), daud_header(), daud_write_header(), dc1394_read_common(), decode_stream_header(), deplanarize(), dirac_header(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_extract_video_info(), dv_frame_offset(), dv_init_demux(), dv_init_mux(), dv_offset_reset(), dv_produce_packet(), dxa_read_header(), ea_read_header(), extract_mpeg4_header(), ff_asf_parse_packet(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ff_raw_audio_read_header(), ff_raw_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_send_aac(), ff_sauce_read(), ffm_close(), ffm_read_header(), ffm_write_header(), film_read_header(), find_stream_in_feed(), flac_header(), flac_read_header(), flac_write_header(), flac_write_trailer(), flic_read_header(), flv_get_extradata(), flv_read_metabody(), flv_read_packet(), flv_set_audio_codec(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), fourxm_read_header(), get_attachment(), get_audio_clock(), get_codec_data(), get_packet_header(), get_sindex(), gif_write_header(), gif_write_packet(), grab_read_header(), 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(), has_decode_delay_been_guessed(), http_prepare_data(), http_receive_data(), idcin_read_header(), iff_read_header(), iff_read_packet(), ipmovie_read_header(), iss_read_header(), iss_read_packet(), ivf_write_header(), lmlm4_read_header(), lxf_read_header(), lxf_read_packet(), main(), matroska_parse_block(), matroska_read_header(), mkv_write_block(), mkv_write_header(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), modify_current_stream(), mov_build_index(), mov_read_close(), mov_read_dac3(), mov_read_enda(), mov_read_extradata(), mov_read_glbl(), mov_read_hdlr(), mov_read_smi(), mov_read_strf(), mov_read_trak(), mov_read_trun(), mov_read_wave(), mov_write_ftyp_tag(), mov_write_header(), mov_write_trak_tag(), mov_write_uuidprof_tag(), movie_init(), mp3_parse_vbr_tags(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), 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(), msnwc_tcp_read_header(), mtv_read_header(), mxf_get_d10_aes3_packet(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), 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_stream(), new_subtitle_stream(), new_video_stream(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_close(), nut_read_header(), nuv_header(), ogg_buffer_data(), ogg_read_seek(), 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(), open_audio(), open_input_file(), open_input_stream(), open_parser(), open_video(), opt_input_file(), opt_target(), output_packet(), parse_fmtp(), parse_fmtp_config(), parse_h264_sdp_line(), parse_media_type(), parse_mpeg1waveformatex(), pcm_read_seek(), pmt_cb(), pre_process_video_frame(), prepare_sdp_description(), print_report(), pva_read_header(), qcp_read_header(), qdm2_parse_config(), qdm2_parse_packet(), qt_rtp_parse_packet(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_reda(), r3d_read_redv(), r3d_seek(), raw_read_packet(), rawvideo_read_packet(), rdt_parse_packet(), rdt_parse_sdp_line(), read_desc_chunk(), read_ffserver_streams(), read_gab2_sub(), read_header(), read_kuki_chunk(), read_packet(), read_seek(), real_parse_asm_rule(), 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_header(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rso_read_header(), rso_read_packet(), rso_write_header(), rtp_parse_one_packet(), rtp_parse_open(), rtp_parse_packet_internal(), rtp_parse_queued_packet(), rtp_write_header(), rtp_write_packet(), sap_fetch_packet(), sap_read_header(), sdp_parse_fmtp_config_h264(), seq_read_header(), set_codec_from_probe_data(), show_packet(), show_stream(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), sol_read_header(), sox_read_header(), sox_read_packet(), sox_write_header(), sox_write_trailer(), spdif_read_packet(), spdif_write_header(), speex_header(), speex_packet(), srt_read_header(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), svq3_parse_packet(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), synchronize_audio(), theora_header(), thp_read_header(), tmv_read_header(), transcode(), try_decode_frame(), tta_read_header(), txd_read_header(), update_initial_durations(), update_sample_display(), v4l2_read_header(), v4l2_read_packet(), validate_codec_tag(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_header(), vid_read_packet(), video_audio_display(), vmd_read_header(), voc_get_packet(), voc_read_header(), voc_write_header(), voc_write_packet(), vorbis_header(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), write_audio_frame(), write_header(), write_streamheader(), write_trailer(), write_video_frame(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), xa_read_header(), xa_read_packet(), xiph_parse_fmtp_pair(), yop_read_header(), yuv4_read_header(), and yuv4_read_packet().

Real base framerate of the stream.

This is the lowest framerate with which all timestamps can be represented accurately (it is the least common multiple of all framerates in the stream). Note, this value is just a guess! For example, if the time base is 1/90000 and all frames have either approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.

Definition at line 501 of file avformat.h.

Referenced by av_find_stream_info(), avisynth_read_header(), dump_stream_format(), flv_write_header(), mov_read_trak(), nuv_header(), opt_input_file(), show_stream(), and vc1test_write_header().

Definition at line 502 of file avformat.h.

Referenced by add_av_stream1(), asf_read_pts(), asf_read_stream_properties(), asf_reset_header(), av_open_input_stream(), av_write_trailer(), avformat_free_context(), avi_read_close(), avi_read_header(), avi_read_idx1(), avi_read_packet(), avi_read_seek(), avi_start_new_riff(), 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_interleave_new_audio_packet(), ff_mov_read_stsd_entries(), flush_packet(), 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_ctts(), mov_read_dref(), mov_read_elst(), mov_read_mdhd(), mov_read_packet(), mov_read_stco(), mov_read_stps(), mov_read_stsc(), mov_read_stss(), mov_read_stsz(), mov_read_stts(), mov_read_tkhd(), 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_header(), mpegts_write_packet(), mpegts_write_pes(), mpegts_write_pmt(), mxf_compare_timestamps(), mxf_free(), mxf_get_stream_index(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_read_close(), 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(), and seek_subtitle().

struct AVFrac AVStream::pts [read]

encoding: pts generation when outputting stream

Definition at line 510 of file avformat.h.

Referenced by av_write_header(), compute_pkt_fields2(), main(), print_report(), and transcode().

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

For fixed-fps content, time base should be 1/framerate and timestamp increments should be 1. decoding: set by libavformat encoding: set by libavformat in av_write_header

Definition at line 519 of file avformat.h.

Referenced by applehttp_read_seek(), audio_decode_frame(), av_estimate_timings_from_bit_rate(), av_find_stream_info(), av_pkt_dump2(), av_pkt_dump_log2(), av_seek_frame(), av_set_pts_info(), av_update_cur_dts(), av_update_stream_timings(), av_write_header(), avi_read_packet(), avi_read_seek(), compute_frame_duration(), compute_pkt_fields(), compute_pkt_fields2(), config_output_props(), decode_thread(), do_audio_out(), do_subtitle_out(), do_video_out(), dump_stream_format(), ff_gen_syncpoint_search(), ff_interleave_compare_dts(), ff_interleave_new_audio_packet(), ff_mov_init_hinting(), ff_write_chained(), fill_all_stream_timings(), finalize_packet(), get_subtitle_pkt(), http_prepare_data(), ivf_write_header(), main(), mov_read_chapters(), mov_read_seek(), movie_get_frame(), mp3_parse_vbr_tags(), mxf_read_seek(), nut_read_header(), ogg_compare_granule(), output_packet(), pcm_read_seek(), print_report(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_reda(), r3d_read_redv(), r3d_seek(), read_gab2_sub(), read_header(), read_seek(), read_seek2(), rl2_read_seek(), rtsp_read_play(), rtsp_read_seek(), sap_fetch_packet(), sap_read_header(), search_hi_lo_keyframes(), seek_subtitle(), show_packet(), show_stream(), transcode(), vc1t_read_packet(), vqf_read_seek(), write_audio_frame(), and write_video_frame().

number of bits in pts (used for wrapping control)

Definition at line 520 of file avformat.h.

Referenced by av_estimate_timings_from_pts(), av_read_frame(), av_set_pts_info(), and compute_pkt_fields().

If set, just copy stream.

Definition at line 522 of file avformat.h.

Referenced by new_audio_stream(), new_subtitle_stream(), new_video_stream(), print_report(), read_ffserver_streams(), and transcode().

Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.

MN: dunno if that is the right place for it

Definition at line 530 of file avformat.h.

Referenced by do_video_out(), ffm_read_header(), ffm_write_header(), new_audio_stream(), new_video_stream(), and output_packet().

Decoding: pts of the first frame of the stream, 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 540 of file avformat.h.

Referenced by aiff_read_header(), ape_read_header(), av_estimate_timings(), av_estimate_timings_from_pts(), av_new_stream(), av_update_stream_timings(), avi_read_header(), avisynth_read_header(), decode_thread(), dv_extract_audio_info(), dv_init_demux(), fill_all_stream_timings(), gxf_header(), gxf_seek(), matroska_read_header(), mp3_read_header(), mpc_read_header(), mpegts_read_header(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nut_read_header(), ogg_get_length(), oma_read_header(), read_header(), rm_read_header(), show_stream(), skeleton_header(), tta_read_header(), update_initial_timestamps(), vqf_read_header(), and wv_read_header().

ISO 639-2/B 3-letter language code (empty string if undefined).

Definition at line 550 of file avformat.h.

Referenced by ff_metadata_demux_compat().

Definition at line 558 of file avformat.h.

Referenced by compute_pkt_fields().

Definition at line 564 of file avformat.h.

Referenced by av_add_index_entry(), and mov_build_index().

Definition at line 569 of file avformat.h.

source filename of the stream

Definition at line 573 of file avformat.h.

Referenced by avformat_free_context(), and ff_metadata_demux_compat().

Definition at line 578 of file avformat.h.

Referenced by av_read_packet().

int64_t AVStream::pts_buffer[MAX_REORDER_DELAY+1]

const uint8_t* AVStream::cur_ptr

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 605 of file avformat.h.

Referenced by av_new_stream(), compute_pkt_fields(), ff_read_frame_flush(), ff_restore_parser_state(), and ff_store_parser_state().

last packet in packet_buffer for this stream when muxing.

used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav*

Definition at line 618 of file avformat.h.

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

Average framerate.

Definition at line 623 of file avformat.h.

Referenced by av_find_stream_info(), dump_stream_format(), matroska_read_header(), mov_read_trak(), show_stream(), and transcode().

Number of frames that have been demuxed during av_find_stream_info().

Definition at line 628 of file avformat.h.

Referenced by av_find_best_stream(), av_find_stream_info(), dump_stream_format(), has_decode_delay_been_guessed(), and transcode().

Definition at line 635 of file avformat.h.

Referenced by av_find_stream_info().

Definition at line 636 of file avformat.h.

Referenced by av_find_stream_info().

Definition at line 637 of file avformat.h.

Referenced by av_find_stream_info().

double AVStream::duration_error[MAX_STD_TIMEBASES]

Definition at line 638 of file avformat.h.

Referenced by av_find_stream_info().

Definition at line 639 of file avformat.h.

Referenced by av_find_stream_info().

struct { ... } * AVStream::info


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

Generated on Mon May 2 19:50:33 2011 for FFmpeg by  doxygen 1.5.6