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FFmpeg
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FFmpeg
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#include <avcodec.h>
Data Fields | |
| void * | priv_data |
| struct AVCodecParser * | parser |
| int64_t | frame_offset |
| int64_t | cur_offset |
| int64_t | next_frame_offset |
| int | pict_type |
| int | repeat_pict |
| This field is used for proper frame duration computation in lavf. | |
| int64_t | pts |
| int64_t | dts |
| int64_t | last_pts |
| int64_t | last_dts |
| int | fetch_timestamp |
| int | cur_frame_start_index |
| int64_t | cur_frame_offset [AV_PARSER_PTS_NB] |
| int64_t | cur_frame_pts [AV_PARSER_PTS_NB] |
| int64_t | cur_frame_dts [AV_PARSER_PTS_NB] |
| int | flags |
| int64_t | offset |
| byte offset from starting packet start | |
| int64_t | cur_frame_end [AV_PARSER_PTS_NB] |
| int | key_frame |
| Set by parser to 1 for key frames and 0 for non-key frames. | |
| int64_t | convergence_duration |
| Time difference in stream time base units from the pts of this packet to the point at which the output from the decoder has converged independent from the availability of previous frames. | |
| int | dts_sync_point |
| Synchronization point for start of timestamp generation. | |
| int | dts_ref_dts_delta |
| Offset of the current timestamp against last timestamp sync point in units of AVCodecContext.time_base. | |
| int | pts_dts_delta |
| Presentation delay of current frame in units of AVCodecContext.time_base. | |
| int64_t | cur_frame_pos [AV_PARSER_PTS_NB] |
| Position of the packet in file. | |
| int64_t | pos |
| Byte position of currently parsed frame in stream. | |
| int64_t | last_pos |
| Previous frame byte position. | |
| int | duration |
| Duration of the current frame. | |
| enum AVFieldOrder | field_order |
| enum AVPictureStructure | picture_structure |
| Indicate whether a picture is coded as a frame, top field or bottom field. | |
| int | output_picture_number |
| Picture number incremented in presentation or output order. | |
| void* AVCodecParserContext::priv_data |
Definition at line 4143 of file avcodec.h.
Referenced by aac_parse_init(), ac3_parse_init(), adx_parse(), av_parser_close(), av_parser_init(), bmp_parse(), cavsvideo_parse(), close(), cook_parse(), dca_parse(), dca_parse_init(), decode(), dirac_combine_frame(), dirac_parse(), dirac_parse_close(), dnxhd_parse(), dpx_parse(), dvbsub_parse(), dvbsub_parse_close(), dvbsub_parse_init(), dvd_nav_parse(), dvd_nav_parse_init(), dvdsub_parse(), dvdsub_parse_close(), ff_aac_ac3_parse(), ff_parse_close(), flac_parse(), flac_parse_close(), flac_parse_init(), gsm_parse(), h261_parse(), h263_parse(), h264_parse(), hevc_close(), hevc_find_frame_end(), hevc_init(), hevc_parse(), init(), jpeg_parse(), latm_find_frame_end(), latm_parse(), mlp_parse(), mpeg4_decode_header(), mpeg4video_parse(), mpeg4video_parse_init(), mpegaudio_parse(), mpegvideo_extract_headers(), mpegvideo_parse(), opus_parse(), parse(), parse_nal_units(), png_parse(), pnm_parse(), rv34_parse(), scan_mmco_reset(), tak_parse(), vc1_extract_header(), vc1_parse(), and vc1_parse_init().
| struct AVCodecParser* AVCodecParserContext::parser |
Definition at line 4144 of file avcodec.h.
Referenced by av_parser_change(), av_parser_close(), av_parser_init(), av_parser_parse2(), avformat_find_stream_info(), and remove_extradata().
| int64_t AVCodecParserContext::frame_offset |
Definition at line 4145 of file avcodec.h.
Referenced by av_parser_parse2(), ff_fetch_timestamp(), and parse_packet().
| int64_t AVCodecParserContext::cur_offset |
Definition at line 4146 of file avcodec.h.
Referenced by av_parser_parse2(), and ff_fetch_timestamp().
| int64_t AVCodecParserContext::next_frame_offset |
Definition at line 4148 of file avcodec.h.
Referenced by av_parser_parse2(), ff_fetch_timestamp(), and flac_read_timestamp().
| int AVCodecParserContext::pict_type |
Definition at line 4150 of file avcodec.h.
Referenced by av_parser_init(), compute_pkt_fields(), dirac_combine_frame(), dpx_parse(), dvd_nav_parse(), mpegvideo_extract_headers(), mpegvideo_parse(), mpegvideo_parse_init(), parse(), parse_frame(), parse_nal_units(), parse_packet(), png_parse(), rv34_parse(), scan_mmco_reset(), and vc1_extract_header().
| int AVCodecParserContext::repeat_pict |
This field is used for proper frame duration computation in lavf.
It signals, how much longer the frame duration of the current frame is compared to normal frame duration.
frame_duration = (1 + repeat_pict) * time_base
It is used by codecs like H.264 to display telecined material.
Definition at line 4160 of file avcodec.h.
Referenced by avformat_find_stream_info(), ff_compute_frame_duration(), mpegvideo_extract_headers(), mpegvideo_parse(), parse_nal_units(), process_input_packet(), and vc1_extract_header().
| int64_t AVCodecParserContext::pts |
Definition at line 4161 of file avcodec.h.
Referenced by av_parser_parse2(), dirac_combine_frame(), dvbsub_parse(), dvd_nav_parse(), ff_fetch_timestamp(), flac_parse(), flac_read_timestamp(), get_best_header(), mpeg4_decode_header(), parse_packet(), and rv34_parse().
| int64_t AVCodecParserContext::dts |
Definition at line 4162 of file avcodec.h.
Referenced by av_parser_parse2(), dirac_combine_frame(), ff_fetch_timestamp(), mpeg4_decode_header(), and parse_packet().
| int64_t AVCodecParserContext::last_pts |
Definition at line 4165 of file avcodec.h.
Referenced by av_parser_parse2(), dirac_combine_frame(), and dvbsub_parse().
| int64_t AVCodecParserContext::last_dts |
Definition at line 4166 of file avcodec.h.
Referenced by av_parser_parse2(), and dirac_combine_frame().
| int AVCodecParserContext::fetch_timestamp |
Definition at line 4167 of file avcodec.h.
Referenced by av_parser_init(), av_parser_parse2(), and dvbsub_parse().
| int AVCodecParserContext::cur_frame_start_index |
Definition at line 4170 of file avcodec.h.
Referenced by av_parser_parse2(), and dvbsub_parse().
| int64_t AVCodecParserContext::cur_frame_offset[AV_PARSER_PTS_NB] |
Definition at line 4171 of file avcodec.h.
Referenced by av_parser_parse2(), and ff_fetch_timestamp().
| int64_t AVCodecParserContext::cur_frame_pts[AV_PARSER_PTS_NB] |
Definition at line 4172 of file avcodec.h.
Referenced by av_parser_parse2(), dvbsub_parse(), and ff_fetch_timestamp().
| int64_t AVCodecParserContext::cur_frame_dts[AV_PARSER_PTS_NB] |
Definition at line 4173 of file avcodec.h.
Referenced by av_parser_parse2(), and ff_fetch_timestamp().
| int AVCodecParserContext::flags |
Definition at line 4175 of file avcodec.h.
Referenced by av_parser_parse2(), avformat_find_stream_info(), cavsvideo_parse(), dca_parse(), dirac_parse(), dnxhd_parse(), flac_parse(), flac_read_timestamp(), get_best_header(), h261_parse(), h263_parse(), h264_parse(), hevc_parse(), init(), jpeg_parse(), latm_parse(), mpeg4_decode_header(), mpeg4video_parse(), mpegvideo_parse(), old_flac_header(), parse_packet(), read_frame_internal(), tak_parse(), and vc1_parse().
| int64_t AVCodecParserContext::offset |
byte offset from starting packet start
Definition at line 4182 of file avcodec.h.
Referenced by compute_pkt_fields(), and ff_fetch_timestamp().
| int64_t AVCodecParserContext::cur_frame_end[AV_PARSER_PTS_NB] |
Definition at line 4183 of file avcodec.h.
Referenced by av_parser_parse2(), and ff_fetch_timestamp().
| int AVCodecParserContext::key_frame |
Set by parser to 1 for key frames and 0 for non-key frames.
It is initialized to -1, so if the parser doesn't set this flag, old-style fallback using AV_PICTURE_TYPE_I picture type as key frames will be used.
Definition at line 4191 of file avcodec.h.
Referenced by av_parser_init(), parse_frame(), parse_nal_units(), parse_packet(), and tak_parse().
| int64_t AVCodecParserContext::convergence_duration |
Time difference in stream time base units from the pts of this packet to the point at which the output from the decoder has converged independent from the availability of previous frames.
That is, the frames are virtually identical no matter if decoding started from the very first frame or from this keyframe. Is AV_NOPTS_VALUE if unknown. This field is not the display duration of the current frame. This field has no meaning if the packet does not have AV_PKT_FLAG_KEY set.
The purpose of this field is to allow seeking in streams that have no keyframes in the conventional sense. It corresponds to the recovery point SEI in H.264 and match_time_delta in NUT. It is also essential for some types of subtitle streams to ensure that all subtitles are correctly displayed after seeking.
Definition at line 4210 of file avcodec.h.
Referenced by av_parser_init(), and compute_pkt_fields().
| int AVCodecParserContext::dts_sync_point |
Synchronization point for start of timestamp generation.
Set to >0 for sync point, 0 for no sync point and <0 for undefined (default).
For example, this corresponds to presence of H.264 buffering period SEI message.
Definition at line 4222 of file avcodec.h.
Referenced by av_parser_init(), and h264_parse().
| int AVCodecParserContext::dts_ref_dts_delta |
Offset of the current timestamp against last timestamp sync point in units of AVCodecContext.time_base.
Set to INT_MIN when dts_sync_point unused. Otherwise, it must contain a valid timestamp offset.
Note that the timestamp of sync point has usually a nonzero dts_ref_dts_delta, which refers to the previous sync point. Offset of the next frame after timestamp sync point will be usually 1.
For example, this corresponds to H.264 cpb_removal_delay.
Definition at line 4237 of file avcodec.h.
Referenced by av_parser_init(), and h264_parse().
| int AVCodecParserContext::pts_dts_delta |
Presentation delay of current frame in units of AVCodecContext.time_base.
Set to INT_MIN when dts_sync_point unused. Otherwise, it must contain valid non-negative timestamp delta (presentation time of a frame must not lie in the past).
This delay represents the difference between decoding and presentation time of the frame.
For example, this corresponds to H.264 dpb_output_delay.
Definition at line 4251 of file avcodec.h.
Referenced by av_parser_init(), and h264_parse().
| int64_t AVCodecParserContext::cur_frame_pos[AV_PARSER_PTS_NB] |
Position of the packet in file.
Analogous to cur_frame_pts/dts
Definition at line 4258 of file avcodec.h.
Referenced by av_parser_parse2(), and ff_fetch_timestamp().
| int64_t AVCodecParserContext::pos |
Byte position of currently parsed frame in stream.
Definition at line 4263 of file avcodec.h.
Referenced by av_parser_parse2(), ff_fetch_timestamp(), and parse_packet().
| int64_t AVCodecParserContext::last_pos |
Previous frame byte position.
Definition at line 4268 of file avcodec.h.
Referenced by av_parser_parse2().
| int AVCodecParserContext::duration |
Duration of the current frame.
For audio, this is in units of 1 / AVCodecContext.sample_rate. For all other types, this is in units of AVCodecContext.time_base.
Definition at line 4275 of file avcodec.h.
Referenced by adx_parse(), cook_parse(), dca_parse(), dvd_nav_parse(), ff_aac_ac3_parse(), flac_parse(), get_best_header(), gsm_parse(), mlp_parse(), mpegaudio_parse(), opus_parse(), parse_packet(), and tak_parse().
| enum AVFieldOrder AVCodecParserContext::field_order |
Definition at line 4277 of file avcodec.h.
Referenced by mpegvideo_extract_headers(), parse_nal_units(), and vc1_extract_header().
| enum AVPictureStructure AVCodecParserContext::picture_structure |
Indicate whether a picture is coded as a frame, top field or bottom field.
For example, H.264 field_pic_flag equal to 0 corresponds to AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag equal to 1 and bottom_field_flag equal to 0 corresponds to AV_PICTURE_STRUCTURE_TOP_FIELD.
Definition at line 4287 of file avcodec.h.
Referenced by parse_nal_units().
| int AVCodecParserContext::output_picture_number |
Picture number incremented in presentation or output order.
This field may be reinitialized at the first picture of a new sequence.
For example, this corresponds to H.264 PicOrderCnt.
Definition at line 4295 of file avcodec.h.
Referenced by parse_nal_units().
1.8.2