FFmpeg: Frame parsing

Enumerator
AV_PICTURE_STRUCTURE_UNKNOWN	unknown
AV_PICTURE_STRUCTURE_TOP_FIELD	coded as top field
AV_PICTURE_STRUCTURE_BOTTOM_FIELD	coded as bottom field
AV_PICTURE_STRUCTURE_FRAME	coded as frame

Definition at line 2568 of file avcodec.h.

Function Documentation

◆ av_parser_iterate()

const AVCodecParser* av_parser_iterate ( void ** opaque )

Iterate over all registered codec parsers.

Parameters: opaque a pointer where libavcodec will store the iteration state. Must point to NULL to start the iteration.

Returns: the next registered codec parser or NULL when the iteration is finished

Definition at line 91 of file parsers.c.

Referenced by av_parser_init().

◆ av_parser_init()

AVCodecParserContext* av_parser_init ( int codec_id )

Examples: decode_audio.c, and decode_video.c.

Definition at line 33 of file parser.c.

Referenced by avformat_find_stream_info(), dash_init(), flac_read_timestamp(), LLVMFuzzerTestOneInput(), main(), old_flac_header(), and read_frame_internal().

◆ av_parser_parse2()

int av_parser_parse2 ( AVCodecParserContext * s,

AVCodecContext * avctx,

uint8_t ** poutbuf,

int * poutbuf_size,

const uint8_t * buf,

int buf_size,

int64_t pts,

int64_t dts,

int64_t pos

)

Parse a packet.

Parameters: s parser context.

avctx codec context.

poutbuf set to pointer to parsed buffer or NULL if not yet finished.

poutbuf_size set to size of parsed buffer or zero if not yet finished.

buf input buffer.

buf_size buffer size in bytes without the padding. I.e. the full buffer size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE. To signal EOF, this should be 0 (so that the last frame can be output).

pts input presentation timestamp.

dts input decoding timestamp.

pos input byte position in stream.

Returns: the number of bytes of the input bitstream used.

Example:

while(in_len){

len = av_parser_parse2(myparser, AVCodecContext, &data, &size,

in_data, in_len,

pts, dts, pos);

in_data += len;

in_len -= len;

if(size)

decode_frame(data, size);

}

Examples: decode_audio.c, and decode_video.c.

Definition at line 116 of file parser.c.

Referenced by dash_write_packet(), flac_read_timestamp(), LLVMFuzzerTestOneInput(), main(), old_flac_header(), and parse_packet().

◆ av_parser_close()

void av_parser_close ( AVCodecParserContext * s )

Examples: decode_audio.c, and decode_video.c.

Definition at line 194 of file parser.c.

Referenced by dash_free(), estimate_timings_from_pts(), ff_free_stream(), ff_read_frame_flush(), flac_read_timestamp(), LLVMFuzzerTestOneInput(), main(), old_flac_header(), parse_packet(), read_frame_internal(), and update_stream_avctx().

decode_frame

static int decode_frame(AVCodecContext *avctx, AVFrame *picture, int *got_frame, AVPacket *avpkt)

Definition: 4xm.c:837

data

const char data[16]

Definition: mxf.c:149

pts

static int64_t pts

Definition: transcode_aac.c:644

size

int size

Definition: twinvq_data.h:10344

len

int len

Definition: vorbis_enc_data.h:426

pos

unsigned int pos

Definition: spdifenc.c:414

AVCodecContext

main external API structure.

Definition: avcodec.h:431

av_parser_parse2

int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)

Parse a packet.

Definition: parser.c:116

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