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mux.c
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1 /*
2  * muxing functions for use within FFmpeg
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avformat.h"
23 #include "avio_internal.h"
24 #include "internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
31 #include "metadata.h"
32 #include "id3v2.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
39 #include "riff.h"
40 #include "audiointerleave.h"
41 #include "url.h"
42 #include <stdarg.h>
43 #if CONFIG_NETWORK
44 #include "network.h"
45 #endif
46 
47 /**
48  * @file
49  * muxing functions for use within libavformat
50  */
51 
52 /* fraction handling */
53 
54 /**
55  * f = val + (num / den) + 0.5.
56  *
57  * 'num' is normalized so that it is such as 0 <= num < den.
58  *
59  * @param f fractional number
60  * @param val integer value
61  * @param num must be >= 0
62  * @param den must be >= 1
63  */
64 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
65 {
66  num += (den >> 1);
67  if (num >= den) {
68  val += num / den;
69  num = num % den;
70  }
71  f->val = val;
72  f->num = num;
73  f->den = den;
74 }
75 
76 /**
77  * Fractional addition to f: f = f + (incr / f->den).
78  *
79  * @param f fractional number
80  * @param incr increment, can be positive or negative
81  */
82 static void frac_add(FFFrac *f, int64_t incr)
83 {
84  int64_t num, den;
85 
86  num = f->num + incr;
87  den = f->den;
88  if (num < 0) {
89  f->val += num / den;
90  num = num % den;
91  if (num < 0) {
92  num += den;
93  f->val--;
94  }
95  } else if (num >= den) {
96  f->val += num / den;
97  num = num % den;
98  }
99  f->num = num;
100 }
101 
103 {
104  AVRational q;
105  int j;
106 
107  q = st->time_base;
108 
109  for (j=2; j<14; j+= 1+(j>2))
110  while (q.den / q.num < min_precision && q.num % j == 0)
111  q.num /= j;
112  while (q.den / q.num < min_precision && q.den < (1<<24))
113  q.den <<= 1;
114 
115  return q;
116 }
117 
119 {
120  AVCodecParameters *par = st->codecpar;
121  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
122 
124  return par->chroma_location;
125 
126  if (pix_desc) {
127  if (pix_desc->log2_chroma_h == 0) {
128  return AVCHROMA_LOC_TOPLEFT;
129  } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
131  switch (par->codec_id) {
132  case AV_CODEC_ID_MJPEG:
134  }
135  }
137  switch (par->codec_id) {
139  }
140  }
141  }
142  }
143 
145 
146 }
147 
149  const char *format, const char *filename)
150 {
152  int ret = 0;
153 
154  *avctx = NULL;
155  if (!s)
156  goto nomem;
157 
158  if (!oformat) {
159  if (format) {
160  oformat = av_guess_format(format, NULL, NULL);
161  if (!oformat) {
162  av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
163  ret = AVERROR(EINVAL);
164  goto error;
165  }
166  } else {
167  oformat = av_guess_format(NULL, filename, NULL);
168  if (!oformat) {
169  ret = AVERROR(EINVAL);
170  av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
171  filename);
172  goto error;
173  }
174  }
175  }
176 
177  s->oformat = oformat;
178  if (s->oformat->priv_data_size > 0) {
180  if (!s->priv_data)
181  goto nomem;
182  if (s->oformat->priv_class) {
183  *(const AVClass**)s->priv_data= s->oformat->priv_class;
185  }
186  } else
187  s->priv_data = NULL;
188 
189  if (filename) {
190 #if FF_API_FORMAT_FILENAME
192  av_strlcpy(s->filename, filename, sizeof(s->filename));
194 #endif
195  if (!(s->url = av_strdup(filename)))
196  goto nomem;
197 
198  }
199  *avctx = s;
200  return 0;
201 nomem:
202  av_log(s, AV_LOG_ERROR, "Out of memory\n");
203  ret = AVERROR(ENOMEM);
204 error:
206  return ret;
207 }
208 
210 {
211  const AVCodecTag *avctag;
212  int n;
213  enum AVCodecID id = AV_CODEC_ID_NONE;
214  int64_t tag = -1;
215 
216  /**
217  * Check that tag + id is in the table
218  * If neither is in the table -> OK
219  * If tag is in the table with another id -> FAIL
220  * If id is in the table with another tag -> FAIL unless strict < normal
221  */
222  for (n = 0; s->oformat->codec_tag[n]; n++) {
223  avctag = s->oformat->codec_tag[n];
224  while (avctag->id != AV_CODEC_ID_NONE) {
225  if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
226  id = avctag->id;
227  if (id == st->codecpar->codec_id)
228  return 1;
229  }
230  if (avctag->id == st->codecpar->codec_id)
231  tag = avctag->tag;
232  avctag++;
233  }
234  }
235  if (id != AV_CODEC_ID_NONE)
236  return 0;
237  if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
238  return 0;
239  return 1;
240 }
241 
242 
244 {
245  int ret = 0, i;
246  AVStream *st;
247  AVDictionary *tmp = NULL;
248  AVCodecParameters *par = NULL;
249  AVOutputFormat *of = s->oformat;
250  const AVCodecDescriptor *desc;
252 
253  if (options)
254  av_dict_copy(&tmp, *options, 0);
255 
256  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
257  goto fail;
258  if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
259  (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
260  goto fail;
261 
262 #if FF_API_FORMAT_FILENAME
264  if (!s->url && !(s->url = av_strdup(s->filename))) {
266 #else
267  if (!s->url && !(s->url = av_strdup(""))) {
268 #endif
269  ret = AVERROR(ENOMEM);
270  goto fail;
271  }
272 
273 #if FF_API_LAVF_AVCTX
275  if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
276  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
278  "The AVFormatContext is not in set to bitexact mode, only "
279  "the AVCodecContext. If this is not intended, set "
280  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
281  }
282  }
284 #endif
285 
286  // some sanity checks
287  if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
288  av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
289  ret = AVERROR(EINVAL);
290  goto fail;
291  }
292 
293  for (i = 0; i < s->nb_streams; i++) {
294  st = s->streams[i];
295  par = st->codecpar;
296 
297 #if FF_API_LAVF_AVCTX
300  st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
301  av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
302  "parameters to muxers is deprecated, use AVStream.codecpar "
303  "instead.\n");
304  ret = avcodec_parameters_from_context(st->codecpar, st->codec);
305  if (ret < 0)
306  goto fail;
307  }
309 #endif
310 
311  if (!st->time_base.num) {
312  /* fall back on the default timebase values */
313  if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
314  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
315  else
316  avpriv_set_pts_info(st, 33, 1, 90000);
317  }
318 
319  switch (par->codec_type) {
320  case AVMEDIA_TYPE_AUDIO:
321  if (par->sample_rate <= 0) {
322  av_log(s, AV_LOG_ERROR, "sample rate not set\n");
323  ret = AVERROR(EINVAL);
324  goto fail;
325  }
326  if (!par->block_align)
327  par->block_align = par->channels *
328  av_get_bits_per_sample(par->codec_id) >> 3;
329  break;
330  case AVMEDIA_TYPE_VIDEO:
331  if ((par->width <= 0 || par->height <= 0) &&
332  !(of->flags & AVFMT_NODIMENSIONS)) {
333  av_log(s, AV_LOG_ERROR, "dimensions not set\n");
334  ret = AVERROR(EINVAL);
335  goto fail;
336  }
339  ) {
340  if (st->sample_aspect_ratio.num != 0 &&
341  st->sample_aspect_ratio.den != 0 &&
342  par->sample_aspect_ratio.num != 0 &&
343  par->sample_aspect_ratio.den != 0) {
344  av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
345  "(%d/%d) and encoder layer (%d/%d)\n",
348  par->sample_aspect_ratio.den);
349  ret = AVERROR(EINVAL);
350  goto fail;
351  }
352  }
353  break;
354  }
355 
356  desc = avcodec_descriptor_get(par->codec_id);
357  if (desc && desc->props & AV_CODEC_PROP_REORDER)
358  st->internal->reorder = 1;
359 
360  if (of->codec_tag) {
361  if ( par->codec_tag
362  && par->codec_id == AV_CODEC_ID_RAWVIDEO
363  && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
364  || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
365  && !validate_codec_tag(s, st)) {
366  // the current rawvideo encoding system ends up setting
367  // the wrong codec_tag for avi/mov, we override it here
368  par->codec_tag = 0;
369  }
370  if (par->codec_tag) {
371  if (!validate_codec_tag(s, st)) {
372  const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
373  av_log(s, AV_LOG_ERROR,
374  "Tag %s incompatible with output codec id '%d' (%s)\n",
375  av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
376  ret = AVERROR_INVALIDDATA;
377  goto fail;
378  }
379  } else
380  par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
381  }
382 
385  }
386 
387  if (!s->priv_data && of->priv_data_size > 0) {
389  if (!s->priv_data) {
390  ret = AVERROR(ENOMEM);
391  goto fail;
392  }
393  if (of->priv_class) {
394  *(const AVClass **)s->priv_data = of->priv_class;
396  if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
397  goto fail;
398  }
399  }
400 
401  /* set muxer identification string */
402  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
403  av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
404  } else {
405  av_dict_set(&s->metadata, "encoder", NULL, 0);
406  }
407 
408  for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
409  av_dict_set(&s->metadata, e->key, NULL, 0);
410  }
411 
412  if (options) {
413  av_dict_free(options);
414  *options = tmp;
415  }
416 
417  if (s->oformat->init) {
418  if ((ret = s->oformat->init(s)) < 0) {
419  if (s->oformat->deinit)
420  s->oformat->deinit(s);
421  return ret;
422  }
423  return ret == 0;
424  }
425 
426  return 0;
427 
428 fail:
429  av_dict_free(&tmp);
430  return ret;
431 }
432 
433 static int init_pts(AVFormatContext *s)
434 {
435  int i;
436  AVStream *st;
437 
438  /* init PTS generation */
439  for (i = 0; i < s->nb_streams; i++) {
440  int64_t den = AV_NOPTS_VALUE;
441  st = s->streams[i];
442 
443  switch (st->codecpar->codec_type) {
444  case AVMEDIA_TYPE_AUDIO:
445  den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
446  break;
447  case AVMEDIA_TYPE_VIDEO:
448  den = (int64_t)st->time_base.num * st->time_base.den;
449  break;
450  default:
451  break;
452  }
453 
454  if (!st->internal->priv_pts)
455  st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
456  if (!st->internal->priv_pts)
457  return AVERROR(ENOMEM);
458 
459  if (den != AV_NOPTS_VALUE) {
460  if (den <= 0)
461  return AVERROR_INVALIDDATA;
462 
463  frac_init(st->internal->priv_pts, 0, 0, den);
464  }
465  }
466 
467  if (s->avoid_negative_ts < 0) {
470  s->avoid_negative_ts = 0;
471  } else
473  }
474 
475  return 0;
476 }
477 
479 {
480  if (s->pb && s->pb->error >= 0) {
481  if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
482  avio_flush(s->pb);
483  else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
485  }
486 }
487 
489 {
490  int ret = 0;
491 
492  if ((ret = init_muxer(s, options)) < 0)
493  return ret;
494 
495  s->internal->initialized = 1;
496  s->internal->streams_initialized = ret;
497 
498  if (s->oformat->init && ret) {
499  if ((ret = init_pts(s)) < 0)
500  return ret;
501 
503  }
504 
506 }
507 
509 {
510  int ret = 0;
511  int already_initialized = s->internal->initialized;
512  int streams_already_initialized = s->internal->streams_initialized;
513 
514  if (!already_initialized)
515  if ((ret = avformat_init_output(s, options)) < 0)
516  return ret;
517 
518  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
520  if (s->oformat->write_header) {
521  ret = s->oformat->write_header(s);
522  if (ret >= 0 && s->pb && s->pb->error < 0)
523  ret = s->pb->error;
524  if (ret < 0)
525  goto fail;
526  flush_if_needed(s);
527  }
528  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
530 
531  if (!s->internal->streams_initialized) {
532  if ((ret = init_pts(s)) < 0)
533  goto fail;
534  }
535 
536  return streams_already_initialized;
537 
538 fail:
539  if (s->oformat->deinit)
540  s->oformat->deinit(s);
541  return ret;
542 }
543 
544 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
545 
546 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
547  it is only being used internally to this file as a consistency check.
548  The value is chosen to be very unlikely to appear on its own and to cause
549  immediate failure if used anywhere as a real size. */
550 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
551 
552 
553 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
555 //FIXME merge with compute_pkt_fields
556 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
557 {
558  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
559  int num, den, i;
560  int frame_size;
561 
562  if (!s->internal->missing_ts_warning &&
563  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
565  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
567  "Timestamps are unset in a packet for stream %d. "
568  "This is deprecated and will stop working in the future. "
569  "Fix your code to set the timestamps properly\n", st->index);
570  s->internal->missing_ts_warning = 1;
571  }
572 
573  if (s->debug & FF_FDEBUG_TS)
574  av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
575  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
576 
577  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
578  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
579  pkt->duration, pkt->stream_index);
580  pkt->duration = 0;
581  }
582 
583  /* duration field */
584  if (pkt->duration == 0) {
585  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
586  if (den && num) {
587  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
588  }
589  }
590 
591  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
592  pkt->pts = pkt->dts;
593 
594  //XXX/FIXME this is a temporary hack until all encoders output pts
595  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
596  static int warned;
597  if (!warned) {
598  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
599  warned = 1;
600  }
601  pkt->dts =
602 // pkt->pts= st->cur_dts;
603  pkt->pts = st->internal->priv_pts->val;
604  }
605 
606  //calculate dts from pts
607  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
608  st->pts_buffer[0] = pkt->pts;
609  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
610  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
611  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
612  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
613 
614  pkt->dts = st->pts_buffer[0];
615  }
616 
617  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
618  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
621  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
622  av_log(s, AV_LOG_ERROR,
623  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
624  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
625  return AVERROR(EINVAL);
626  }
627  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
628  av_log(s, AV_LOG_ERROR,
629  "pts (%s) < dts (%s) in stream %d\n",
630  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
631  st->index);
632  return AVERROR(EINVAL);
633  }
634 
635  if (s->debug & FF_FDEBUG_TS)
636  av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
637  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
638 
639  st->cur_dts = pkt->dts;
640  st->internal->priv_pts->val = pkt->dts;
641 
642  /* update pts */
643  switch (st->codecpar->codec_type) {
644  case AVMEDIA_TYPE_AUDIO:
645  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
646  ((AVFrame *)pkt->data)->nb_samples :
647  av_get_audio_frame_duration(st->codec, pkt->size);
648 
649  /* HACK/FIXME, we skip the initial 0 size packets as they are most
650  * likely equal to the encoder delay, but it would be better if we
651  * had the real timestamps from the encoder */
652  if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
653  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
654  }
655  break;
656  case AVMEDIA_TYPE_VIDEO:
657  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
658  break;
659  }
660  return 0;
661 }
663 #endif
664 
665 /**
666  * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
667  * sidedata.
668  *
669  * FIXME: this function should NEVER get undefined pts/dts beside when the
670  * AVFMT_NOTIMESTAMPS is set.
671  * Those additional safety checks should be dropped once the correct checks
672  * are set in the callers.
673  */
675 {
676  int ret;
677  int64_t pts_backup, dts_backup;
678 
679  pts_backup = pkt->pts;
680  dts_backup = pkt->dts;
681 
682  // If the timestamp offsetting below is adjusted, adjust
683  // ff_interleaved_peek similarly.
684  if (s->output_ts_offset) {
685  AVStream *st = s->streams[pkt->stream_index];
687 
688  if (pkt->dts != AV_NOPTS_VALUE)
689  pkt->dts += offset;
690  if (pkt->pts != AV_NOPTS_VALUE)
691  pkt->pts += offset;
692  }
693 
694  if (s->avoid_negative_ts > 0) {
695  AVStream *st = s->streams[pkt->stream_index];
696  int64_t offset = st->mux_ts_offset;
697  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
698 
699  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
700  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
701  s->internal->offset = -ts;
703  }
704 
705  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
706  offset = st->mux_ts_offset =
709  st->time_base,
710  AV_ROUND_UP);
711  }
712 
713  if (pkt->dts != AV_NOPTS_VALUE)
714  pkt->dts += offset;
715  if (pkt->pts != AV_NOPTS_VALUE)
716  pkt->pts += offset;
717 
719  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
720  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
721  "pts %s in stream %d.\n"
722  "Try -avoid_negative_ts 1 as a possible workaround.\n",
723  av_ts2str(pkt->pts),
724  pkt->stream_index
725  );
726  }
727  } else {
728  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
729  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
731  "Packets poorly interleaved, failed to avoid negative "
732  "timestamp %s in stream %d.\n"
733  "Try -max_interleave_delta 0 as a possible workaround.\n",
734  av_ts2str(pkt->dts),
735  pkt->stream_index
736  );
737  }
738  }
739  }
740 
741  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
742  AVFrame *frame = (AVFrame *)pkt->data;
744  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
745  av_frame_free(&frame);
746  } else {
747  ret = s->oformat->write_packet(s, pkt);
748  }
749 
750  if (s->pb && ret >= 0) {
751  flush_if_needed(s);
752  if (s->pb->error < 0)
753  ret = s->pb->error;
754  }
755 
756  if (ret < 0) {
757  pkt->pts = pts_backup;
758  pkt->dts = dts_backup;
759  }
760 
761  return ret;
762 }
763 
765 {
766  if (!pkt)
767  return 0;
768 
769  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
770  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
771  pkt->stream_index);
772  return AVERROR(EINVAL);
773  }
774 
776  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
777  return AVERROR(EINVAL);
778  }
779 
780  return 0;
781 }
782 
784 {
785  int ret;
786 
787  ret = check_packet(s, pkt);
788  if (ret < 0)
789  return ret;
790 
791 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
792  /* sanitize the timestamps */
793  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
794  AVStream *st = s->streams[pkt->stream_index];
795 
796  /* when there is no reordering (so dts is equal to pts), but
797  * only one of them is set, set the other as well */
798  if (!st->internal->reorder) {
799  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
800  pkt->pts = pkt->dts;
801  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
802  pkt->dts = pkt->pts;
803  }
804 
805  /* check that the timestamps are set */
806  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
807  av_log(s, AV_LOG_ERROR,
808  "Timestamps are unset in a packet for stream %d\n", st->index);
809  return AVERROR(EINVAL);
810  }
811 
812  /* check that the dts are increasing (or at least non-decreasing,
813  * if the format allows it */
814  if (st->cur_dts != AV_NOPTS_VALUE &&
815  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
816  st->cur_dts > pkt->dts)) {
817  av_log(s, AV_LOG_ERROR,
818  "Application provided invalid, non monotonically increasing "
819  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
820  st->index, st->cur_dts, pkt->dts);
821  return AVERROR(EINVAL);
822  }
823 
824  if (pkt->pts < pkt->dts) {
825  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
826  pkt->pts, pkt->dts, st->index);
827  return AVERROR(EINVAL);
828  }
829  }
830 #endif
831 
832  return 0;
833 }
834 
836  AVStream *st = s->streams[pkt->stream_index];
837  int i, ret;
838 
839  if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
840  return 1;
841 
842  if (s->oformat->check_bitstream) {
843  if (!st->internal->bitstream_checked) {
844  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
845  return ret;
846  else if (ret == 1)
847  st->internal->bitstream_checked = 1;
848  }
849  }
850 
851  for (i = 0; i < st->internal->nb_bsfcs; i++) {
852  AVBSFContext *ctx = st->internal->bsfcs[i];
853  // TODO: when any bitstream filter requires flushing at EOF, we'll need to
854  // flush each stream's BSF chain on write_trailer.
855  if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
856  av_log(ctx, AV_LOG_ERROR,
857  "Failed to send packet to filter %s for stream %d\n",
858  ctx->filter->name, pkt->stream_index);
859  return ret;
860  }
861  // TODO: when any automatically-added bitstream filter is generating multiple
862  // output packets for a single input one, we'll need to call this in a loop
863  // and write each output packet.
864  if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
865  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
866  return 0;
867  av_log(ctx, AV_LOG_ERROR,
868  "Failed to send packet to filter %s for stream %d\n",
869  ctx->filter->name, pkt->stream_index);
871  return ret;
872  return 0;
873  }
874  }
875  return 1;
876 }
877 
879 {
880  int ret;
881 
882  ret = prepare_input_packet(s, pkt);
883  if (ret < 0)
884  return ret;
885 
886  if (!pkt) {
887  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
888  ret = s->oformat->write_packet(s, NULL);
889  flush_if_needed(s);
890  if (ret >= 0 && s->pb && s->pb->error < 0)
891  ret = s->pb->error;
892  return ret;
893  }
894  return 1;
895  }
896 
897  ret = do_packet_auto_bsf(s, pkt);
898  if (ret <= 0)
899  return ret;
900 
901 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
902  ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
903 
904  if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
905  return ret;
906 #endif
907 
908  ret = write_packet(s, pkt);
909  if (ret >= 0 && s->pb && s->pb->error < 0)
910  ret = s->pb->error;
911 
912  if (ret >= 0)
913  s->streams[pkt->stream_index]->nb_frames++;
914  return ret;
915 }
916 
917 #define CHUNK_START 0x1000
918 
920  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
921 {
922  int ret;
923  AVPacketList **next_point, *this_pktl;
924  AVStream *st = s->streams[pkt->stream_index];
925  int chunked = s->max_chunk_size || s->max_chunk_duration;
926 
927  this_pktl = av_mallocz(sizeof(AVPacketList));
928  if (!this_pktl)
929  return AVERROR(ENOMEM);
930  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
932  av_assert0(((AVFrame *)pkt->data)->buf);
933  this_pktl->pkt = *pkt;
934  pkt->buf = NULL;
935  pkt->side_data = NULL;
936  pkt->side_data_elems = 0;
937  } else {
938  if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
939  av_free(this_pktl);
940  return ret;
941  }
942  }
943 
945  next_point = &(st->last_in_packet_buffer->next);
946  } else {
947  next_point = &s->internal->packet_buffer;
948  }
949 
950  if (chunked) {
952  st->interleaver_chunk_size += pkt->size;
955  || (max && st->interleaver_chunk_duration > max)) {
956  st->interleaver_chunk_size = 0;
957  this_pktl->pkt.flags |= CHUNK_START;
958  if (max && st->interleaver_chunk_duration > max) {
959  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
960  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
961 
962  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
963  } else
965  }
966  }
967  if (*next_point) {
968  if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
969  goto next_non_null;
970 
971  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
972  while ( *next_point
973  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
974  || !compare(s, &(*next_point)->pkt, pkt)))
975  next_point = &(*next_point)->next;
976  if (*next_point)
977  goto next_non_null;
978  } else {
979  next_point = &(s->internal->packet_buffer_end->next);
980  }
981  }
982  av_assert1(!*next_point);
983 
984  s->internal->packet_buffer_end = this_pktl;
985 next_non_null:
986 
987  this_pktl->next = *next_point;
988 
990  *next_point = this_pktl;
991 
992  av_packet_unref(pkt);
993 
994  return 0;
995 }
996 
998  AVPacket *pkt)
999 {
1000  AVStream *st = s->streams[pkt->stream_index];
1001  AVStream *st2 = s->streams[next->stream_index];
1002  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1003  st->time_base);
1005  int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1006  int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1007  if (ts == ts2) {
1008  ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
1009  -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
1010  ts2=0;
1011  }
1012  comp= (ts>ts2) - (ts<ts2);
1013  }
1014 
1015  if (comp == 0)
1016  return pkt->stream_index < next->stream_index;
1017  return comp > 0;
1018 }
1019 
1021  AVPacket *pkt, int flush)
1022 {
1023  AVPacketList *pktl;
1024  int stream_count = 0;
1025  int noninterleaved_count = 0;
1026  int i, ret;
1027  int eof = flush;
1028 
1029  if (pkt) {
1030  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1031  return ret;
1032  }
1033 
1034  for (i = 0; i < s->nb_streams; i++) {
1035  if (s->streams[i]->last_in_packet_buffer) {
1036  ++stream_count;
1037  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1040  ++noninterleaved_count;
1041  }
1042  }
1043 
1044  if (s->internal->nb_interleaved_streams == stream_count)
1045  flush = 1;
1046 
1047  if (s->max_interleave_delta > 0 &&
1048  s->internal->packet_buffer &&
1049  !flush &&
1050  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1051  ) {
1052  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1053  int64_t delta_dts = INT64_MIN;
1054  int64_t top_dts = av_rescale_q(top_pkt->dts,
1055  s->streams[top_pkt->stream_index]->time_base,
1056  AV_TIME_BASE_Q);
1057 
1058  for (i = 0; i < s->nb_streams; i++) {
1059  int64_t last_dts;
1060  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1061 
1062  if (!last)
1063  continue;
1064 
1065  last_dts = av_rescale_q(last->pkt.dts,
1066  s->streams[i]->time_base,
1067  AV_TIME_BASE_Q);
1068  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1069  }
1070 
1071  if (delta_dts > s->max_interleave_delta) {
1072  av_log(s, AV_LOG_DEBUG,
1073  "Delay between the first packet and last packet in the "
1074  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1075  delta_dts, s->max_interleave_delta);
1076  flush = 1;
1077  }
1078  }
1079 
1080  if (s->internal->packet_buffer &&
1081  eof &&
1082  (s->flags & AVFMT_FLAG_SHORTEST) &&
1084  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1085 
1086  s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1087  s->streams[top_pkt->stream_index]->time_base,
1088  AV_TIME_BASE_Q);
1089  }
1090 
1091  if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1092  while (s->internal->packet_buffer) {
1093  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1094  AVStream *st;
1095  int64_t top_dts = av_rescale_q(top_pkt->dts,
1096  s->streams[top_pkt->stream_index]->time_base,
1097  AV_TIME_BASE_Q);
1098 
1099  if (s->internal->shortest_end + 1 >= top_dts)
1100  break;
1101 
1102  pktl = s->internal->packet_buffer;
1103  st = s->streams[pktl->pkt.stream_index];
1104 
1105  s->internal->packet_buffer = pktl->next;
1106  if (!s->internal->packet_buffer)
1108 
1109  if (st->last_in_packet_buffer == pktl)
1111 
1112  av_packet_unref(&pktl->pkt);
1113  av_freep(&pktl);
1114  flush = 0;
1115  }
1116  }
1117 
1118  if (stream_count && flush) {
1119  AVStream *st;
1120  pktl = s->internal->packet_buffer;
1121  *out = pktl->pkt;
1122  st = s->streams[out->stream_index];
1123 
1124  s->internal->packet_buffer = pktl->next;
1125  if (!s->internal->packet_buffer)
1127 
1128  if (st->last_in_packet_buffer == pktl)
1130  av_freep(&pktl);
1131 
1132  return 1;
1133  } else {
1134  av_init_packet(out);
1135  return 0;
1136  }
1137 }
1138 
1140  AVPacket *pkt, int add_offset)
1141 {
1142  AVPacketList *pktl = s->internal->packet_buffer;
1143  while (pktl) {
1144  if (pktl->pkt.stream_index == stream) {
1145  *pkt = pktl->pkt;
1146  if (add_offset) {
1147  AVStream *st = s->streams[pkt->stream_index];
1148  int64_t offset = st->mux_ts_offset;
1149 
1150  if (s->output_ts_offset)
1152 
1153  if (pkt->dts != AV_NOPTS_VALUE)
1154  pkt->dts += offset;
1155  if (pkt->pts != AV_NOPTS_VALUE)
1156  pkt->pts += offset;
1157  }
1158  return 0;
1159  }
1160  pktl = pktl->next;
1161  }
1162  return AVERROR(ENOENT);
1163 }
1164 
1165 /**
1166  * Interleave an AVPacket correctly so it can be muxed.
1167  * @param out the interleaved packet will be output here
1168  * @param in the input packet
1169  * @param flush 1 if no further packets are available as input and all
1170  * remaining packets should be output
1171  * @return 1 if a packet was output, 0 if no packet could be output,
1172  * < 0 if an error occurred
1173  */
1175 {
1176  if (s->oformat->interleave_packet) {
1177  int ret = s->oformat->interleave_packet(s, out, in, flush);
1178  if (in)
1179  av_packet_unref(in);
1180  return ret;
1181  } else
1182  return ff_interleave_packet_per_dts(s, out, in, flush);
1183 }
1184 
1186 {
1187  int ret, flush = 0;
1188 
1189  ret = prepare_input_packet(s, pkt);
1190  if (ret < 0)
1191  goto fail;
1192 
1193  if (pkt) {
1194  AVStream *st = s->streams[pkt->stream_index];
1195 
1196  ret = do_packet_auto_bsf(s, pkt);
1197  if (ret == 0)
1198  return 0;
1199  else if (ret < 0)
1200  goto fail;
1201 
1202  if (s->debug & FF_FDEBUG_TS)
1203  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1204  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1205 
1206 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1207  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1208  goto fail;
1209 #endif
1210 
1211  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1212  ret = AVERROR(EINVAL);
1213  goto fail;
1214  }
1215  } else {
1216  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1217  flush = 1;
1218  }
1219 
1220  for (;; ) {
1221  AVPacket opkt;
1222  int ret = interleave_packet(s, &opkt, pkt, flush);
1223  if (pkt) {
1224  memset(pkt, 0, sizeof(*pkt));
1225  av_init_packet(pkt);
1226  pkt = NULL;
1227  }
1228  if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1229  return ret;
1230 
1231  ret = write_packet(s, &opkt);
1232  if (ret >= 0)
1233  s->streams[opkt.stream_index]->nb_frames++;
1234 
1235  av_packet_unref(&opkt);
1236 
1237  if (ret < 0)
1238  return ret;
1239  if(s->pb && s->pb->error)
1240  return s->pb->error;
1241  }
1242 fail:
1243  av_packet_unref(pkt);
1244  return ret;
1245 }
1246 
1248 {
1249  int ret, i;
1250 
1251  for (;; ) {
1252  AVPacket pkt;
1253  ret = interleave_packet(s, &pkt, NULL, 1);
1254  if (ret < 0)
1255  goto fail;
1256  if (!ret)
1257  break;
1258 
1259  ret = write_packet(s, &pkt);
1260  if (ret >= 0)
1261  s->streams[pkt.stream_index]->nb_frames++;
1262 
1263  av_packet_unref(&pkt);
1264 
1265  if (ret < 0)
1266  goto fail;
1267  if(s->pb && s->pb->error)
1268  goto fail;
1269  }
1270 
1271 fail:
1272  if (s->oformat->write_trailer) {
1273  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1275  if (ret >= 0) {
1276  ret = s->oformat->write_trailer(s);
1277  } else {
1278  s->oformat->write_trailer(s);
1279  }
1280  }
1281 
1282  if (s->oformat->deinit)
1283  s->oformat->deinit(s);
1284 
1285  s->internal->initialized =
1286  s->internal->streams_initialized = 0;
1287 
1288  if (s->pb)
1289  avio_flush(s->pb);
1290  if (ret == 0)
1291  ret = s->pb ? s->pb->error : 0;
1292  for (i = 0; i < s->nb_streams; i++) {
1293  av_freep(&s->streams[i]->priv_data);
1294  av_freep(&s->streams[i]->index_entries);
1295  }
1296  if (s->oformat->priv_class)
1297  av_opt_free(s->priv_data);
1298  av_freep(&s->priv_data);
1299  return ret;
1300 }
1301 
1302 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1303  int64_t *dts, int64_t *wall)
1304 {
1305  if (!s->oformat || !s->oformat->get_output_timestamp)
1306  return AVERROR(ENOSYS);
1307  s->oformat->get_output_timestamp(s, stream, dts, wall);
1308  return 0;
1309 }
1310 
1311 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1313 {
1314  AVPacket local_pkt;
1315  int ret;
1316 
1317  local_pkt = *pkt;
1318  local_pkt.stream_index = dst_stream;
1319  if (pkt->pts != AV_NOPTS_VALUE)
1320  local_pkt.pts = av_rescale_q(pkt->pts,
1321  src->streams[pkt->stream_index]->time_base,
1322  dst->streams[dst_stream]->time_base);
1323  if (pkt->dts != AV_NOPTS_VALUE)
1324  local_pkt.dts = av_rescale_q(pkt->dts,
1325  src->streams[pkt->stream_index]->time_base,
1326  dst->streams[dst_stream]->time_base);
1327  if (pkt->duration)
1328  local_pkt.duration = av_rescale_q(pkt->duration,
1329  src->streams[pkt->stream_index]->time_base,
1330  dst->streams[dst_stream]->time_base);
1331 
1332  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1333  else ret = av_write_frame(dst, &local_pkt);
1334  pkt->buf = local_pkt.buf;
1335  pkt->side_data = local_pkt.side_data;
1336  pkt->side_data_elems = local_pkt.side_data_elems;
1337  return ret;
1338 }
1339 
1340 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1341  AVFrame *frame, int interleaved)
1342 {
1343  AVPacket pkt, *pktp;
1344 
1345  av_assert0(s->oformat);
1346  if (!s->oformat->write_uncoded_frame)
1347  return AVERROR(ENOSYS);
1348 
1349  if (!frame) {
1350  pktp = NULL;
1351  } else {
1352  pktp = &pkt;
1353  av_init_packet(&pkt);
1354  pkt.data = (void *)frame;
1356  pkt.pts =
1357  pkt.dts = frame->pts;
1358  pkt.duration = frame->pkt_duration;
1359  pkt.stream_index = stream_index;
1361  }
1362 
1363  return interleaved ? av_interleaved_write_frame(s, pktp) :
1364  av_write_frame(s, pktp);
1365 }
1366 
1367 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1368  AVFrame *frame)
1369 {
1370  return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1371 }
1372 
1374  AVFrame *frame)
1375 {
1376  return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1377 }
1378 
1380 {
1381  av_assert0(s->oformat);
1382  if (!s->oformat->write_uncoded_frame)
1383  return AVERROR(ENOSYS);
1384  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1386 }
#define AV_CODEC_PROP_REORDER
Codec supports frame reordering.
Definition: avcodec.h:753
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:105
int64_t interleaver_chunk_size
Definition: avformat.h:1122
enum AVChromaLocation chroma_location
Definition: avcodec.h:3974
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:3965
int audio_preload
Audio preload in microseconds.
Definition: avformat.h:1697
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:764
enum AVCodecID id
Definition: internal.h:45
static const char * format[]
Definition: af_aiir.c:311
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2384
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:524
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1185
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:167
FFFrac * priv_pts
Definition: internal.h:194
static void flush(AVCodecContext *avctx)
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:617
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1764
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:878
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:626
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:154
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4827
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: avformat.h:1101
const char * desc
Definition: nvenc.c:65
#define AVSTREAM_INIT_IN_INIT_OUTPUT
stream parameters initialized in avformat_init_output
Definition: avformat.h:2513
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1777
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:3960
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1298
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5696
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:936
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: avcodec.h:5687
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1431
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Interleave a packet per dts in an output media file.
Definition: mux.c:1020
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1103
int(* check_bitstream)(struct AVFormatContext *, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header...
Definition: avformat.h:632
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1802
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
int av_get_output_timestamp(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Get timing information for the data currently output.
Definition: mux.c:1302
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:108
void * priv_data
Definition: avformat.h:889
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int avoid_negative_ts_use_pts
Definition: internal.h:121
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:558
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1379
#define src
Definition: vp8dsp.c:254
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:478
static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1340
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1657
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:479
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)
Write a packet to another muxer than the one the user originally intended.
Definition: mux.c:1311
Trailer data, which doesn't contain actual content, but only for finalizing the output file...
Definition: avio.h:140
Format I/O context.
Definition: avformat.h:1351
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1866
int64_t cur_dts
Definition: avformat.h:1077
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dst_linesize, int src_linesize, enum FilterMode mode, int swap)
Definition: vf_il.c:117
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
internal metadata API header see avformat.h or the public API!
#define CHUNK_START
Definition: mux.c:917
Public dictionary API.
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:201
static void flush_if_needed(AVFormatContext *s)
Definition: mux.c:478
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT, AVFMT_TS_NEGATIVE
Definition: avformat.h:526
Round toward +infinity.
Definition: mathematics.h:83
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: avcodec.h:3950
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVOptions.
A point in the output bytestream where the underlying AVIOContext might flush the buffer depending on...
Definition: avio.h:146
timestamp utils, mostly useful for debugging/logging purposes
Query whether the feature is possible on this stream.
Definition: internal.h:628
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AVPacket pkt
Definition: avformat.h:2016
#define f(width, name)
Definition: cbs_vp9.c:255
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:548
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:61
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1448
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:311
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:493
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static AVFrame * frame
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
const char * name
Definition: avcodec.h:5737
void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
Return the frame duration in seconds.
Definition: utils.c:948
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
uint8_t * data
Definition: avcodec.h:1430
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int64_t max_interleave_delta
Maximum buffering duration for interleaving.
Definition: avformat.h:1651
uint32_t tag
Definition: movenc.c:1455
#define AVERROR_EOF
End of file.
Definition: error.h:55
struct AVPacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:78
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2512
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1174
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1499
int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat, const char *format, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
#define av_log(a,...)
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1370
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:601
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define AVFMT_FLAG_FLUSH_PACKETS
Flush the AVIOContext every packet.
Definition: avformat.h:1492
int(* write_uncoded_frame)(struct AVFormatContext *, int stream_index, AVFrame **frame, unsigned flags)
Write an uncoded AVFrame.
Definition: avformat.h:590
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1589
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1495
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
Definition: mux.c:209
#define AVERROR(e)
Definition: error.h:43
#define AV_PKT_FLAG_UNCODED_FRAME
Definition: mux.c:544
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
int(* write_header)(struct AVFormatContext *)
Definition: avformat.h:550
char * url
input or output URL.
Definition: avformat.h:1447
int video_delay
Video only.
Definition: avcodec.h:3979
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1413
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: avcodec.h:1442
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define FFMAX(a, b)
Definition: common.h:94
int64_t val
Definition: internal.h:62
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:117
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3135
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: avcodec.h:715
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Make timestamps non negative, move side data from payload to internal struct, call muxer...
Definition: mux.c:674
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:136
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:161
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: avcodec.h:4001
This is any, unlabelled data.
Definition: avio.h:135
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:886
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:126
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:508
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:526
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:175
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1680
static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
f = val + (num / den) + 0.5.
Definition: mux.c:64
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2653
int n
Definition: avisynth_c.h:684
AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
Definition: format.c:51
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static int init_muxer(AVFormatContext *s, AVDictionary **options)
Definition: mux.c:243
Opaque data information usually sparse.
Definition: avutil.h:205
int64_t num
Definition: internal.h:62
void(* get_output_timestamp)(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Definition: avformat.h:574
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:535
int avformat_init_output(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and initialize the codec, but do not write the header.
Definition: mux.c:488
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
Set all the options from a given dictionary on an object.
Definition: opt.c:1571
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
static void error(const char *err)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:842
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:83
Stream structure.
Definition: avformat.h:874
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:469
int ff_interleaved_peek(AVFormatContext *s, int stream, AVPacket *pkt, int add_offset)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1139
#define FF_FDEBUG_TS
Definition: avformat.h:1633
int frame_size
Definition: mxfenc.c:2117
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:498
int debug
Flags to enable debugging.
Definition: avformat.h:1632
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1596
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:532
int64_t den
Definition: internal.h:62
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define UNCODED_FRAME_PACKET_SIZE
Definition: mux.c:550
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:71
Describe the class of an AVClass context structure.
Definition: log.h:67
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:131
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2579
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1776
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define AV_DISPOSITION_TIMED_THUMBNAILS
The stream is sparse, and contains thumbnail images, often corresponding to chapter markers...
Definition: avformat.h:847
int avcodec_parameters_from_context(AVCodecParameters *par, const AVCodecContext *codec)
Fill the parameters struct based on the values from the supplied codec context.
Definition: utils.c:2021
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
Currently only used to set pixel format if not YUV420P.
Definition: avformat.h:563
enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:118
static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:835
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:102
#define AVFMT_AVOID_NEG_TS_AUTO
Enabled when required by target format.
Definition: avformat.h:1681
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4390
#define AVFMT_FLAG_AUTO_BSF
Add bitstream filters as requested by the muxer.
Definition: avformat.h:1508
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:1700
misc parsing utilities
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:699
unsigned int tag
Definition: internal.h:46
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:113
int sample_rate
Audio only.
Definition: avcodec.h:3994
int64_t interleaver_chunk_duration
Definition: avformat.h:1123
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1683
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1441
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, AVPacket *, AVPacket *))
Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare...
Definition: mux.c:919
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1551
const OptionDef options[]
Definition: ffmpeg_opt.c:3294
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1373
common internal api header.
struct AVPacketList * next
Definition: avformat.h:2017
if(ret< 0)
Definition: vf_mcdeint.c:279
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465
#define AVFMT_NOSTREAMS
Format does not require any streams.
Definition: avformat.h:474
int max_chunk_size
Max chunk size in bytes Note, not all formats support this and unpredictable things may happen if it ...
Definition: avformat.h:1713
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1616
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:927
static void frac_add(FFFrac *f, int64_t incr)
Fractional addition to f: f = f + (incr / f->den).
Definition: mux.c:82
static int init_pts(AVFormatContext *s)
Definition: mux.c:433
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:925
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
int av_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1367
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.
Definition: avformat.h:1178
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1682
struct AVPacketList * packet_buffer_end
Definition: internal.h:79
#define av_free(p)
static int interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
Definition: mux.c:997
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
int max_chunk_duration
Max chunk time in microseconds.
Definition: avformat.h:1705
void * priv_data
Format private data.
Definition: avformat.h:1379
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:473
int channels
Audio only.
Definition: avcodec.h:3990
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:172
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1429
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1247
FILE * out
Definition: movenc.c:54
#define av_freep(p)
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:522
unbuffered private I/O API
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:525
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
Definition: mathematics.c:134
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3888
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: avcodec.h:1432
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
#define MKTAG(a, b, c, d)
Definition: common.h:366
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:484
This structure stores compressed data.
Definition: avcodec.h:1407
int(* write_trailer)(struct AVFormatContext *)
Definition: avformat.h:559
static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:783
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: avformat.h:1098
Header data; this needs to be present for the stream to be decodeable.
Definition: avio.h:115
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AVFMT_FLAG_SHORTEST
Stop muxing when the shortest stream stops.
Definition: avformat.h:1507
static uint8_t tmp[11]
Definition: aes_ctr.c:26