118
145
enum PixelFormat pix_fmt;
119
int channel; /* used to select dv channel */
120
#if LIBAVFORMAT_VERSION_INT < (52<<16)
121
const char *device; /* video, audio or DV device */
123
const char *standard; /* tv standard, NTSC, PAL, SECAM */
124
int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
125
int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
146
int channel; /**< used to select dv channel */
147
const char *standard; /**< tv standard, NTSC, PAL, SECAM */
148
int mpeg2ts_raw:1; /**< force raw MPEG2 transport stream output, if possible */
149
int mpeg2ts_compute_pcr:1; /**< compute exact PCR for each transport
126
150
stream packet (only meaningful if
127
mpeg2ts_raw is TRUE */
128
int initial_pause:1; /* do not begin to play the stream
151
mpeg2ts_raw is TRUE) */
152
int initial_pause:1; /**< do not begin to play the stream
129
153
immediately (RTSP only) */
130
154
int prealloced_context:1;
155
#if LIBAVFORMAT_VERSION_INT < (53<<16)
131
156
enum CodecID video_codec_id;
132
157
enum CodecID audio_codec_id;
133
159
} AVFormatParameters;
135
161
//! demuxer will use url_fopen, no opened file should be provided by the caller
136
162
#define AVFMT_NOFILE 0x0001
137
#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
138
#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
139
#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
163
#define AVFMT_NEEDNUMBER 0x0002 /**< needs '%d' in filename */
164
#define AVFMT_SHOW_IDS 0x0008 /**< show format stream IDs numbers */
165
#define AVFMT_RAWPICTURE 0x0020 /**< format wants AVPicture structure for
140
166
raw picture data */
141
#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
142
#define AVFMT_NOTIMESTAMPS 0x0080 /* format doesnt need / has any timestamps */
143
#define AVFMT_GENERIC_INDEX 0x0100 /* use generic index building code */
167
#define AVFMT_GLOBALHEADER 0x0040 /**< format wants global header */
168
#define AVFMT_NOTIMESTAMPS 0x0080 /**< format does not need / have any timestamps */
169
#define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
145
171
typedef struct AVOutputFormat {
146
172
const char *name;
147
173
const char *long_name;
148
174
const char *mime_type;
149
const char *extensions; /* comma separated extensions */
150
/* size of private data so that it can be allocated in the wrapper */
175
const char *extensions; /**< comma separated filename extensions */
176
/** size of private data so that it can be allocated in the wrapper */
151
177
int priv_data_size;
152
178
/* output support */
153
enum CodecID audio_codec; /* default audio codec */
154
enum CodecID video_codec; /* default video codec */
179
enum CodecID audio_codec; /**< default audio codec */
180
enum CodecID video_codec; /**< default video codec */
155
181
int (*write_header)(struct AVFormatContext *);
156
182
int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
157
183
int (*write_trailer)(struct AVFormatContext *);
158
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
184
/** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
160
/* currently only used to set pixel format if not YUV420P */
186
/** currently only used to set pixel format if not YUV420P */
161
187
int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
162
188
int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
197
229
* @param stream_index must not be -1
198
230
* @param flags selects which direction should be preferred if no exact
199
231
* match is available
232
* @return >= 0 on success (but not necessarily the new offset)
201
234
int (*read_seek)(struct AVFormatContext *,
202
235
int stream_index, int64_t timestamp, int flags);
204
* gets the next timestamp in AV_TIME_BASE units.
237
* gets the next timestamp in stream[stream_index].time_base units.
238
* @return the timestamp or AV_NOPTS_VALUE if an error occurred
206
240
int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
207
241
int64_t *pos, int64_t pos_limit);
208
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
242
/** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
210
/* if extensions are defined, then no probe is done. You should
244
/** if extensions are defined, then no probe is done. You should
211
245
usually not use extension format guessing because it is not
212
246
reliable enough */
213
247
const char *extensions;
214
/* general purpose read only value that the format can use */
248
/** general purpose read only value that the format can use */
217
/* start/resume playing - only meaningful if using a network based format
251
/** start/resume playing - only meaningful if using a network based format
219
253
int (*read_play)(struct AVFormatContext *);
221
/* pause playing - only meaningful if using a network based format
255
/** pause playing - only meaningful if using a network based format
223
257
int (*read_pause)(struct AVFormatContext *);
228
262
struct AVInputFormat *next;
265
enum AVStreamParseType {
267
AVSTREAM_PARSE_FULL, /**< full parsing and repack */
268
AVSTREAM_PARSE_HEADERS, /**< only parse headers, don't repack */
269
AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on packet boundary */
231
272
typedef struct AVIndexEntry {
233
274
int64_t timestamp;
234
275
#define AVINDEX_KEYFRAME 0x0001
236
int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align)
237
int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
277
int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs 32 byte due to possible 8byte align).
278
int min_distance; /**< min distance between this and the previous keyframe, used to avoid unneeded searching */
281
#define AV_DISPOSITION_DEFAULT 0x0001
282
#define AV_DISPOSITION_DUB 0x0002
283
#define AV_DISPOSITION_ORIGINAL 0x0004
284
#define AV_DISPOSITION_COMMENT 0x0008
285
#define AV_DISPOSITION_LYRICS 0x0010
286
#define AV_DISPOSITION_KARAOKE 0x0020
290
* New fields can be added to the end with minor version bumps.
291
* Removal, reordering and changes to existing fields require a major
293
* sizeof(AVStream) must not be used outside libav*.
240
295
typedef struct AVStream {
241
int index; /* stream index in AVFormatContext */
242
int id; /* format specific stream id */
243
AVCodecContext *codec; /* codec context */
296
int index; /**< stream index in AVFormatContext */
297
int id; /**< format specific stream id */
298
AVCodecContext *codec; /**< codec context */
245
* real base frame rate of the stream.
246
* this is the lowest framerate with which all timestamps can be
247
* represented accurately (its the least common multiple of all
248
* framerates in the stream), Note, this value is just a guess!
249
* for example if the timebase is 1/90000 and all frames have either
250
* approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
300
* Real base frame rate of the stream.
301
* This is the lowest frame rate with which all timestamps can be
302
* represented accurately (it is the least common multiple of all
303
* frame rates in the stream), Note, this value is just a guess!
304
* For example if the timebase is 1/90000 and all frames have either
305
* approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1.
252
307
AVRational r_frame_rate;
254
310
/* internal data used in av_find_stream_info() */
255
int64_t codec_info_duration;
256
int codec_info_nb_frames;
257
/* encoding: PTS generation when outputing stream */
312
/** encoding: PTS generation when outputing stream */
261
* this is the fundamental unit of time (in seconds) in terms
262
* of which frame timestamps are represented. for fixed-fps content,
263
* timebase should be 1/framerate and timestamp increments should be
316
* This is the fundamental unit of time (in seconds) in terms
317
* of which frame timestamps are represented. For fixed-fps content,
318
* timebase should be 1/frame rate and timestamp increments should be
266
321
AVRational time_base;
267
int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
322
int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
268
323
/* ffmpeg.c private use */
269
int stream_copy; /* if TRUE, just copy stream */
270
enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
324
int stream_copy; /**< if set, just copy stream */
325
enum AVDiscard discard; ///< selects which packets can be discarded at will and do not need to be demuxed
271
326
//FIXME move stuff to a flags field?
272
/* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
273
* MN:dunno if thats the right place, for it */
327
/** quality, as it has been removed from AVCodecContext and put in AVVideoFrame
328
* MN: dunno if that is the right place for it */
275
/* decoding: position of the first frame of the component, in
276
AV_TIME_BASE fractional seconds. */
331
* Decoding: pts of the first frame of the stream, in stream time base.
332
* Only set this if you are absolutely 100% sure that the value you set
333
* it to really is the pts of the first frame.
334
* This may be undefined (AV_NOPTS_VALUE).
335
* @note The ASF header does NOT contain a correct start_time the ASF
336
* demuxer must NOT set this.
277
338
int64_t start_time;
278
/* decoding: duration of the stream, in AV_TIME_BASE fractional
340
* Decoding: duration of the stream, in stream time base.
341
* If a source file does not specify a duration, but does specify
342
* a bitrate, this value will be estimates from bit rate and file size.
280
344
int64_t duration;
282
char language[4]; /* ISO 639 3-letter language code (empty string if undefined) */
346
char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
284
348
/* av_read_frame() support */
285
int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
349
enum AVStreamParseType need_parsing;
286
350
struct AVCodecParserContext *parser;
289
353
int last_IP_duration;
290
354
int64_t last_IP_pts;
291
355
/* av_seek_frame() support */
292
AVIndexEntry *index_entries; /* only used if the format does not
356
AVIndexEntry *index_entries; /**< only used if the format does not
293
357
support seeking natively */
294
358
int nb_index_entries;
295
359
unsigned int index_entries_allocated_size;
299
363
#define MAX_REORDER_DELAY 4
300
364
int64_t pts_buffer[MAX_REORDER_DELAY+1];
366
char *filename; /**< source filename of the stream */
368
int disposition; /**< AV_DISPOSITION_* bitfield */
303
#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
371
#define AV_PROGRAM_RUNNING 1
374
* New fields can be added to the end with minor version bumps.
375
* Removal, reordering and changes to existing fields require a major
377
* sizeof(AVProgram) must not be used outside libav*.
379
typedef struct AVProgram {
381
char *provider_name; ///< Network name for DVB streams
382
char *name; ///< Service name for DVB streams
384
enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller
385
unsigned int *stream_index;
386
unsigned int nb_stream_indexes;
389
#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
304
390
(streams are added dynamically) */
306
392
#define MAX_STREAMS 20
308
/* format I/O context */
395
* format I/O context.
396
* New fields can be added to the end with minor version bumps.
397
* Removal, reordering and changes to existing fields require a major
399
* sizeof(AVFormatContext) must not be used outside libav*.
309
401
typedef struct AVFormatContext {
310
const AVClass *av_class; /* set by av_alloc_format_context */
402
const AVClass *av_class; /**< set by av_alloc_format_context */
311
403
/* can only be iformat or oformat, not both at the same time */
312
404
struct AVInputFormat *iformat;
313
405
struct AVOutputFormat *oformat;
316
408
unsigned int nb_streams;
317
409
AVStream *streams[MAX_STREAMS];
318
char filename[1024]; /* input or output filename */
410
char filename[1024]; /**< input or output filename */
319
411
/* stream info */
320
412
int64_t timestamp;
323
415
char copyright[512];
324
416
char comment[512];
326
int year; /* ID3 year, 0 if none */
327
int track; /* track number, 0 if none */
328
char genre[32]; /* ID3 genre */
418
int year; /**< ID3 year, 0 if none */
419
int track; /**< track number, 0 if none */
420
char genre[32]; /**< ID3 genre */
330
int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
422
int ctx_flags; /**< format specific flags, see AVFMTCTX_xx */
331
423
/* private data for pts handling (do not modify directly) */
332
/* This buffer is only needed when packets were already buffered but
424
/** This buffer is only needed when packets were already buffered but
333
425
not decoded, for example to get the codec parameters in mpeg
335
427
struct AVPacketList *packet_buffer;
337
/* decoding: position of the first frame of the component, in
429
/** decoding: position of the first frame of the component, in
338
430
AV_TIME_BASE fractional seconds. NEVER set this value directly:
339
431
it is deduced from the AVStream values. */
340
432
int64_t start_time;
341
/* decoding: duration of the stream, in AV_TIME_BASE fractional
433
/** decoding: duration of the stream, in AV_TIME_BASE fractional
342
434
seconds. NEVER set this value directly: it is deduced from the
343
435
AVStream values. */
344
436
int64_t duration;
345
/* decoding: total file size. 0 if unknown */
437
/** decoding: total file size. 0 if unknown */
346
438
int64_t file_size;
347
/* decoding: total stream bitrate in bit/s, 0 if not
439
/** decoding: total stream bitrate in bit/s, 0 if not
348
440
available. Never set it directly if the file_size and the
349
441
duration are known as ffmpeg can compute it automatically. */
410
541
const char *filename, const char *mime_type);
411
542
AVOutputFormat *guess_format(const char *short_name,
412
543
const char *filename, const char *mime_type);
546
* Guesses the codec id based upon muxer and filename.
413
548
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
414
549
const char *filename, const char *mime_type, enum CodecType type);
552
* Send a nice hexadecimal dump of a buffer to the specified file stream.
554
* @param f The file stream pointer where the dump should be sent to.
556
* @param size buffer size
558
* @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
416
560
void av_hex_dump(FILE *f, uint8_t *buf, int size);
563
* Send a nice hexadecimal dump of a buffer to the log.
565
* @param avcl A pointer to an arbitrary struct of which the first field is a
566
* pointer to an AVClass struct.
567
* @param level The importance level of the message, lower values signifying
570
* @param size buffer size
572
* @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
574
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
577
* Send a nice dump of a packet to the specified file stream.
579
* @param f The file stream pointer where the dump should be sent to.
580
* @param pkt packet to dump
581
* @param dump_payload true if the payload must be displayed too
417
583
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
586
* Send a nice dump of a packet to the log.
588
* @param avcl A pointer to an arbitrary struct of which the first field is a
589
* pointer to an AVClass struct.
590
* @param level The importance level of the message, lower values signifying
592
* @param pkt packet to dump
593
* @param dump_payload true if the payload must be displayed too
595
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
419
597
void av_register_all(void);
421
/* codec tag <-> codec id */
599
/** codec tag <-> codec id */
422
600
enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag);
423
601
unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
425
603
/* media file input */
606
* finds AVInputFormat based on input format's short name.
426
608
AVInputFormat *av_find_input_format(const char *short_name);
613
* @param is_opened whether the file is already opened, determines whether
614
* demuxers with or without AVFMT_NOFILE are probed
427
616
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
619
* Allocates all the structures needed to read an input stream.
620
* This does not open the needed codecs for decoding the stream[s].
428
622
int av_open_input_stream(AVFormatContext **ic_ptr,
429
623
ByteIOContext *pb, const char *filename,
430
624
AVInputFormat *fmt, AVFormatParameters *ap);
627
* Open a media file as input. The codecs are not opened. Only the file
628
* header (if present) is read.
630
* @param ic_ptr the opened media file handle is put here
631
* @param filename filename to open.
632
* @param fmt if non NULL, force the file format to use
633
* @param buf_size optional buffer size (zero if default is OK)
634
* @param ap additional parameters needed when opening the file (NULL if default)
635
* @return 0 if OK. AVERROR_xxx otherwise.
431
637
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
432
638
AVInputFormat *fmt,
434
640
AVFormatParameters *ap);
435
/* no av_open for output, so applications will need this: */
642
* Allocate an AVFormatContext.
643
* Can be freed with av_free() but do not forget to free everything you
644
* explicitly allocated as well!
436
646
AVFormatContext *av_alloc_format_context(void);
649
* Read packets of a media file to get stream information. This
650
* is useful for file formats with no headers such as MPEG. This
651
* function also computes the real frame rate in case of mpeg2 repeat
653
* The logical file position is not changed by this function;
654
* examined packets may be buffered for later processing.
656
* @param ic media file handle
657
* @return >=0 if OK. AVERROR_xxx if error.
658
* @todo Let user decide somehow what information is needed so we do not waste time getting stuff the user does not need.
438
660
int av_find_stream_info(AVFormatContext *ic);
663
* Read a transport packet from a media file.
665
* This function is obsolete and should never be used.
666
* Use av_read_frame() instead.
668
* @param s media file handle
669
* @param pkt is filled
670
* @return 0 if OK. AVERROR_xxx if error.
439
672
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
675
* Return the next frame of a stream.
677
* The returned packet is valid
678
* until the next av_read_frame() or until av_close_input_file() and
679
* must be freed with av_free_packet. For video, the packet contains
680
* exactly one frame. For audio, it contains an integer number of
681
* frames if each frame has a known fixed size (e.g. PCM or ADPCM
682
* data). If the audio frames have a variable size (e.g. MPEG audio),
683
* then it contains one frame.
685
* pkt->pts, pkt->dts and pkt->duration are always set to correct
686
* values in AVStream.timebase units (and guessed if the format cannot
687
* provided them). pkt->pts can be AV_NOPTS_VALUE if the video format
688
* has B frames, so it is better to rely on pkt->dts if you do not
689
* decompress the payload.
691
* @return 0 if OK, < 0 if error or end of file.
440
693
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
696
* Seek to the key frame at timestamp.
697
* 'timestamp' in 'stream_index'.
698
* @param stream_index If stream_index is (-1), a default
699
* stream is selected, and timestamp is automatically converted
700
* from AV_TIME_BASE units to the stream specific time_base.
701
* @param timestamp timestamp in AVStream.time_base units
702
* or if there is no stream specified then in AV_TIME_BASE units
703
* @param flags flags which select direction and seeking mode
704
* @return >= 0 on success
441
706
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
709
* start playing a network based stream (e.g. RTSP stream) at the
442
712
int av_read_play(AVFormatContext *s);
715
* Pause a network based stream (e.g. RTSP stream).
717
* Use av_read_play() to resume it.
443
719
int av_read_pause(AVFormatContext *s);
722
* Free a AVFormatContext allocated by av_open_input_stream.
723
* @param s context to free
725
void av_close_input_stream(AVFormatContext *s);
728
* Close a media file (but not its codecs).
730
* @param s media file handle
444
732
void av_close_input_file(AVFormatContext *s);
735
* Add a new stream to a media file.
737
* Can only be called in the read_header() function. If the flag
738
* AVFMTCTX_NOHEADER is in the format context, then new streams
739
* can be added in read_packet too.
741
* @param s media file handle
742
* @param id file format dependent stream id
445
744
AVStream *av_new_stream(AVFormatContext *s, int id);
745
AVProgram *av_new_program(AVFormatContext *s, int id);
748
* Set the pts for a given stream.
751
* @param pts_wrap_bits number of bits effectively used by the pts
752
* (used for wrap control, 33 is the value for MPEG)
753
* @param pts_num numerator to convert to seconds (MPEG: 1)
754
* @param pts_den denominator to convert to seconds (MPEG: 90000)
446
756
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
447
757
int pts_num, int pts_den);
451
761
#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
453
763
int av_find_default_stream_index(AVFormatContext *s);
766
* Gets the index for a specific timestamp.
767
* @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond to
768
* the timestamp which is <= the requested one, if backward is 0
770
* if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
771
* @return < 0 if no such timestamp could be found
454
773
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
776
* Ensures the index uses less memory than the maximum specified in
777
* AVFormatContext.max_index_size, by discarding entries if it grows
779
* This function is not part of the public API and should only be called
782
void ff_reduce_index(AVFormatContext *s, int stream_index);
785
* Add a index entry into a sorted list updateing if it is already there.
787
* @param timestamp timestamp in the timebase of the given stream
455
789
int av_add_index_entry(AVStream *st,
456
790
int64_t pos, int64_t timestamp, int size, int distance, int flags);
793
* Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp().
794
* This is not supposed to be called directly by a user application, but by demuxers.
795
* @param target_ts target timestamp in the time base of the given stream
796
* @param stream_index stream number
457
798
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
801
* Updates cur_dts of all streams based on given timestamp and AVStream.
803
* Stream ref_st unchanged, others set cur_dts in their native timebase
804
* only needed for timestamp wrapping or if (dts not set and pts!=dts).
805
* @param timestamp new dts expressed in time_base of param ref_st
806
* @param ref_st reference stream giving time_base of param timestamp
458
808
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
811
* Does a binary search using read_timestamp().
812
* This is not supposed to be called directly by a user application, but by demuxers.
813
* @param target_ts target timestamp in the time base of the given stream
814
* @param stream_index stream number
459
816
int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
461
/* media file output */
818
/** media file output */
462
819
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
822
* Allocate the stream private data and write the stream header to an
825
* @param s media file handle
826
* @return 0 if OK. AVERROR_xxx if error.
463
828
int av_write_header(AVFormatContext *s);
831
* Write a packet to an output media file.
833
* The packet shall contain one audio or video frame.
834
* The packet must be correctly interleaved according to the container specification,
835
* if not then av_interleaved_write_frame must be used
837
* @param s media file handle
838
* @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
839
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
464
841
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
844
* Writes a packet to an output media file ensuring correct interleaving.
846
* The packet must contain one audio or video frame.
847
* If the packets are already correctly interleaved the application should
848
* call av_write_frame() instead as it is slightly faster. It is also important
849
* to keep in mind that completely non-interleaved input will need huge amounts
850
* of memory to interleave with this, so it is preferable to interleave at the
853
* @param s media file handle
854
* @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
855
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
465
857
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
860
* Interleave a packet per DTS in an output media file.
862
* Packets with pkt->destruct == av_destruct_packet will be freed inside this function,
863
* so they cannot be used after it, note calling av_free_packet() on them is still safe.
865
* @param s media file handle
866
* @param out the interleaved packet will be output here
867
* @param in the input packet
868
* @param flush 1 if no further packets are available as input and all
869
* remaining packets should be output
870
* @return 1 if a packet was output, 0 if no packet could be output,
871
* < 0 if an error occurred
466
873
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush);
876
* @brief Write the stream trailer to an output media file and
877
* free the file private data.
879
* @param s media file handle
880
* @return 0 if OK. AVERROR_xxx if error.
468
882
int av_write_trailer(AVFormatContext *s);
470
884
void dump_format(AVFormatContext *ic,
474
int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
475
int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
890
* parses width and height out of string str.
891
* @deprecated Use av_parse_video_frame_size instead.
893
attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
896
* Converts frame rate from string to a fraction.
897
* @deprecated Use av_parse_video_frame_rate instead.
899
attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
902
* Parses \p datestr and returns a corresponding number of microseconds.
903
* @param datestr String representing a date or a duration.
904
* - If a date the syntax is:
906
* [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
908
* Time is localtime unless Z is appended, in which case it is
909
* interpreted as UTC.
910
* If the year-month-day part isn't specified it takes the current
912
* Returns the number of microseconds since 1st of January, 1970 up to
913
* the time of the parsed date or INT64_MIN if \p datestr cannot be
914
* successfully parsed.
915
* - If a duration the syntax is:
917
* [-]HH[:MM[:SS[.m...]]]
920
* Returns the number of microseconds contained in a time interval
921
* with the specified duration or INT64_MIN if \p datestr cannot be
922
* successfully parsed.
923
* @param duration Flag which tells how to interpret \p datestr, if
924
* not zero \p datestr is interpreted as a duration, otherwise as a
476
927
int64_t parse_date(const char *datestr, int duration);
478
929
int64_t av_gettime(void);
483
934
void ffm_write_write_index(int fd, offset_t pos);
484
935
void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
938
* Attempts to find a specific tag in a URL.
940
* syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
486
943
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
946
* Returns in 'buf' the path with '%d' replaced by number.
948
* Also handles the '%0nd' format where 'n' is the total number
949
* of digits and '%%'.
951
* @param buf destination buffer
952
* @param buf_size destination buffer size
953
* @param path numbered sequence string
954
* @param number frame number
955
* @return 0 if OK, -1 if format error.
488
957
int av_get_frame_filename(char *buf, int buf_size,
489
958
const char *path, int number);
961
* Check whether filename actually is a numbered sequence generator.
963
* @param filename possible numbered sequence string
964
* @return 1 if a valid numbered sequence string, 0 otherwise.
490
966
int av_filename_number_test(const char *filename);
493
int video_grab_init(void);
494
int audio_init(void);
497
int dv1394_init(void);
498
int dc1394_init(void);
969
* Generate an SDP for an RTP session.
971
* @param ac array of AVFormatContexts describing the RTP streams. If the
972
* array is composed by only one context, such context can contain
973
* multiple AVStreams (one AVStream per RTP stream). Otherwise,
974
* all the contexts in the array (an AVCodecContext per RTP stream)
975
* must contain only one AVStream
976
* @param n_files number of AVCodecContexts contained in ac
977
* @param buff buffer where the SDP will be stored (must be allocated by
979
* @param size the size of the buffer
980
* @return 0 if OK. AVERROR_xxx if error.
982
int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
500
984
#ifdef HAVE_AV_CONFIG_H
502
#include "os_support.h"
504
int strstart(const char *str, const char *val, const char **ptr);
505
int stristart(const char *str, const char *val, const char **ptr);
506
void pstrcpy(char *buf, int buf_size, const char *str);
507
char *pstrcat(char *buf, int buf_size, const char *s);
509
void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
986
void ff_dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
512
989
#define dynarray_add(tab, nb_ptr, elem)\
added
removed
ffmpeg/libavformat/avformat.h
