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.

AVDictionarymetadata
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().
int stream_identifier
 Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
struct {
   int64_t   last_dts
   int64_t   duration_gcd
   int   duration_count
   double   duration_error [MAX_STD_TIMEBASES]
   int64_t   codec_info_duration
info
int request_probe
 flag to indicate that probing is requested NOT PART OF PUBLIC API


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 509 of file avformat.h.


Field Documentation

codec context

Definition at line 512 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(), alloc_picture(), 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_interleaved_write_frame(), av_new_stream(), av_read_frame_internal(), av_read_packet(), av_update_stream_timings(), avformat_find_stream_info(), avformat_free_context(), avformat_write_header(), avi_read_close(), avi_read_header(), avi_read_seek(), 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(), caf_write_header(), cdata_read_header(), celt_header(), check_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_header(), decode_stream_header(), deplanarize(), dfa_read_header(), dirac_header(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dshow_add_device(), 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(), fbdev_read_header(), ff_alsa_open(), 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_rtp_send_latm(), 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(), g726_16_parse_sdp_line(), g726_24_parse_sdp_line(), g726_32_parse_sdp_line(), g726_40_parse_sdp_line(), get_attachment(), get_audio_clock(), get_codec_data(), get_packet_header(), get_sindex(), get_video_frame(), 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(), microdvd_read_header(), microdvd_write_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_chan(), 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_read_wfex(), mov_write_ftyp_tag(), mov_write_header(), mov_write_tkhd_tag(), mov_write_udta_sdp(), 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_data_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(), pmp_header(), 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(), queue_picture(), 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(), sdl_write_header(), sdl_write_packet(), 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(), subtitle_thread(), 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(), v4l2_read_header(), v4l2_read_packet(), v4l2_set_parameters(), validate_codec_tag(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_header(), vid_read_packet(), video_audio_display(), video_image_display(), video_open(), video_refresh(), 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(), xwma_read_header(), xwma_read_packet(), yop_read_header(), yuv4_read_header(), and yuv4_read_packet().

Definition at line 666 of file avformat.h.

Referenced by avformat_find_stream_info().

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

Definition at line 648 of file avformat.h.

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

const uint8_t* AVStream::cur_ptr

Definition at line 664 of file avformat.h.

Referenced by avformat_find_stream_info().

double AVStream::duration_error[MAX_STD_TIMEBASES]

Definition at line 665 of file avformat.h.

Referenced by avformat_find_stream_info().

Definition at line 663 of file avformat.h.

Referenced by avformat_find_stream_info().

source filename of the stream

Definition at line 593 of file avformat.h.

Referenced by avformat_free_context(), and ff_metadata_demux_compat().

stream index in AVFormatContext

Definition at line 510 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_header(), do_audio_out(), do_video_out(), dshow_add_device(), 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(), transcode(), 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().

Definition at line 584 of file avformat.h.

Referenced by av_add_index_entry(), and mov_build_index().

struct { ... } * AVStream::info

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

Definition at line 570 of file avformat.h.

Referenced by ff_metadata_demux_compat().

Definition at line 662 of file avformat.h.

Referenced by avformat_find_stream_info().

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 638 of file avformat.h.

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

Definition at line 578 of file avformat.h.

Referenced by compute_pkt_fields().

Definition at line 522 of file avformat.h.

Referenced by add_av_stream1(), asf_read_pts(), asf_read_stream_properties(), asf_reset_header(), 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().

Definition at line 598 of file avformat.h.

Referenced by av_read_packet().

struct AVFrac AVStream::pts [read]

encoding: pts generation when outputting stream

Definition at line 530 of file avformat.h.

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

int64_t AVStream::pts_buffer[MAX_REORDER_DELAY+1]

number of bits in pts (used for wrapping control)

Definition at line 540 of file avformat.h.

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

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 550 of file avformat.h.

Referenced by do_video_out(), ffm_read_header(), ffm_write_header(), new_audio_stream(), new_video_stream(), and output_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 521 of file avformat.h.

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

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 625 of file avformat.h.

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

flag to indicate that probing is requested NOT PART OF PUBLIC API

Definition at line 673 of file avformat.h.

Referenced by asf_read_stream_properties(), av_read_packet(), avi_read_header(), mpegps_read_packet(), mpegts_find_stream_type(), and mpegts_push_data().

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 560 of file avformat.h.

Referenced by aiff_read_header(), ape_read_header(), av_estimate_timings_from_pts(), av_new_stream(), av_update_stream_timings(), avi_read_header(), avisynth_read_header(), dv_extract_audio_info(), dv_init_demux(), ff_raw_audio_read_header(), 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(), read_thread(), rm_read_header(), show_stream(), skeleton_header(), tta_read_header(), update_initial_timestamps(), vqf_read_header(), and wv_read_header().

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

Definition at line 655 of file avformat.h.

Referenced by ff_parse_mpeg2_descriptor().

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 539 of file avformat.h.

Referenced by applehttp_read_seek(), audio_decode_frame(), av_estimate_timings_from_bit_rate(), av_pkt_dump2(), av_pkt_dump_log2(), av_seek_frame(), av_set_pts_info(), av_update_cur_dts(), av_update_stream_timings(), avformat_find_stream_info(), avformat_write_header(), avi_read_packet(), avi_read_seek(), compute_frame_duration(), compute_pkt_fields(), compute_pkt_fields2(), config_output_props(), 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(), read_thread(), 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(), subtitle_thread(), transcode(), vc1t_read_packet(), video_thread(), vqf_read_seek(), write_audio_frame(), and write_video_frame().

Definition at line 589 of file avformat.h.


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

Generated on Fri Oct 26 02:38:23 2012 for FFmpeg by  doxygen 1.5.8