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movenc.c
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1 /*
2  * Copyright (c) 2015 Martin Storsjo
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "config.h"
22 
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/mathematics.h"
25 #include "libavutil/md5.h"
26 
27 #include "libavformat/avformat.h"
28 
29 #if HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 
33 #if !HAVE_GETOPT
34 #include "compat/getopt.c"
35 #endif
36 
37 #define HASH_SIZE 16
38 
39 static const uint8_t h264_extradata[] = {
40  0x01, 0x4d, 0x40, 0x1e, 0xff, 0xe1, 0x00, 0x02, 0x67, 0x4d, 0x01, 0x00, 0x02, 0x68, 0xef
41 };
42 static const uint8_t aac_extradata[] = {
43  0x12, 0x10
44 };
45 
46 
47 static const char *format = "mp4";
49 uint8_t iobuf[32768];
51 
53 const char *cur_name;
54 FILE* out;
56 struct AVMD5* md5;
58 
61 
62 int bframes;
63 int64_t duration;
65 int frames;
67 int64_t next_p_pts;
75 
77 
79 
80 
81 static void count_warnings(void *avcl, int level, const char *fmt, va_list vl)
82 {
83  if (level == AV_LOG_WARNING)
84  num_warnings++;
85 }
86 
87 static void init_count_warnings(void)
88 {
90  num_warnings = 0;
91 }
92 
93 static void reset_count_warnings(void)
94 {
96 }
97 
98 static int io_write(void *opaque, uint8_t *buf, int size)
99 {
100  out_size += size;
101  av_md5_update(md5, buf, size);
102  if (out)
103  fwrite(buf, 1, size, out);
104  return size;
105 }
106 
107 static int io_write_data_type(void *opaque, uint8_t *buf, int size,
108  enum AVIODataMarkerType type, int64_t time)
109 {
110  char timebuf[30], content[5] = { 0 };
111  const char *str;
112  switch (type) {
113  case AVIO_DATA_MARKER_HEADER: str = "header"; break;
114  case AVIO_DATA_MARKER_SYNC_POINT: str = "sync"; break;
115  case AVIO_DATA_MARKER_BOUNDARY_POINT: str = "boundary"; break;
116  case AVIO_DATA_MARKER_UNKNOWN: str = "unknown"; break;
117  case AVIO_DATA_MARKER_TRAILER: str = "trailer"; break;
118  }
119  if (time == AV_NOPTS_VALUE)
120  snprintf(timebuf, sizeof(timebuf), "nopts");
121  else
122  snprintf(timebuf, sizeof(timebuf), "%"PRId64, time);
123  // There can be multiple header/trailer callbacks, only log the box type
124  // for header at out_size == 0
125  if (type != AVIO_DATA_MARKER_UNKNOWN &&
126  type != AVIO_DATA_MARKER_TRAILER &&
127  (type != AVIO_DATA_MARKER_HEADER || out_size == 0) &&
128  size >= 8)
129  memcpy(content, &buf[4], 4);
130  else
131  snprintf(content, sizeof(content), "-");
132  printf("write_data len %d, time %s, type %s atom %s\n", size, timebuf, str, content);
133  return io_write(opaque, buf, size);
134 }
135 
136 static void init_out(const char *name)
137 {
138  char buf[100];
139  cur_name = name;
140  snprintf(buf, sizeof(buf), "%s.%s", cur_name, format);
141 
142  av_md5_init(md5);
143  if (write_file) {
144  out = fopen(buf, "wb");
145  if (!out)
146  perror(buf);
147  }
148  out_size = 0;
149 }
150 
151 static void close_out(void)
152 {
153  int i;
154  av_md5_final(md5, hash);
155  for (i = 0; i < HASH_SIZE; i++)
156  printf("%02x", hash[i]);
157  printf(" %d %s\n", out_size, cur_name);
158  if (out)
159  fclose(out);
160  out = NULL;
161 }
162 
163 static void check_func(int value, int line, const char *msg, ...)
164 {
165  if (!value) {
166  va_list ap;
167  va_start(ap, msg);
168  printf("%d: ", line);
169  vprintf(msg, ap);
170  printf("\n");
171  check_faults++;
172  va_end(ap);
173  }
174 }
175 #define check(value, ...) check_func(value, __LINE__, __VA_ARGS__)
176 
177 static void init_fps(int bf, int audio_preroll, int fps)
178 {
179  AVStream *st;
180  int iobuf_size = force_iobuf_size ? force_iobuf_size : sizeof(iobuf);
181  ctx = avformat_alloc_context();
182  if (!ctx)
183  exit(1);
185  if (!ctx->oformat)
186  exit(1);
187  ctx->pb = avio_alloc_context(iobuf, iobuf_size, AVIO_FLAG_WRITE, NULL, NULL, io_write, NULL);
188  if (!ctx->pb)
189  exit(1);
191  ctx->flags |= AVFMT_FLAG_BITEXACT;
192 
193  st = avformat_new_stream(ctx, NULL);
194  if (!st)
195  exit(1);
198  st->codecpar->width = 640;
199  st->codecpar->height = 480;
200  st->time_base.num = 1;
201  st->time_base.den = 30;
202  st->codecpar->extradata_size = sizeof(h264_extradata);
204  if (!st->codecpar->extradata)
205  exit(1);
206  memcpy(st->codecpar->extradata, h264_extradata, sizeof(h264_extradata));
207  video_st = st;
208 
209  st = avformat_new_stream(ctx, NULL);
210  if (!st)
211  exit(1);
214  st->codecpar->sample_rate = 44100;
215  st->codecpar->channels = 2;
216  st->time_base.num = 1;
217  st->time_base.den = 44100;
218  st->codecpar->extradata_size = sizeof(aac_extradata);
220  if (!st->codecpar->extradata)
221  exit(1);
222  memcpy(st->codecpar->extradata, aac_extradata, sizeof(aac_extradata));
223  audio_st = st;
224 
225  if (avformat_write_header(ctx, &opts) < 0)
226  exit(1);
227  av_dict_free(&opts);
228 
229  frames = 0;
230  gop_size = 30;
231  duration = video_st->time_base.den / fps;
232  audio_duration = 1024LL * audio_st->time_base.den / audio_st->codecpar->sample_rate;
233  if (audio_preroll)
234  audio_preroll = 2048LL * audio_st->time_base.den / audio_st->codecpar->sample_rate;
235 
236  bframes = bf;
237  video_dts = bframes ? -duration : 0;
238  audio_dts = -audio_preroll;
239 }
240 
241 static void init(int bf, int audio_preroll)
242 {
243  init_fps(bf, audio_preroll, 30);
244 }
245 
246 static void mux_frames(int n, int c)
247 {
248  int end_frames = frames + n;
249  while (1) {
250  AVPacket pkt;
251  uint8_t pktdata[8] = { 0 };
252  av_init_packet(&pkt);
253 
254  if (av_compare_ts(audio_dts, audio_st->time_base, video_dts, video_st->time_base) < 0) {
255  pkt.dts = pkt.pts = audio_dts;
256  pkt.stream_index = 1;
257  pkt.duration = audio_duration;
259  } else {
260  if (frames == end_frames)
261  break;
262  pkt.dts = video_dts;
263  pkt.stream_index = 0;
264  pkt.duration = duration;
265  if ((frames % gop_size) == 0) {
266  pkt.flags |= AV_PKT_FLAG_KEY;
268  pkt.pts = pkt.dts + duration;
269  video_dts = pkt.pts;
270  } else {
273  pkt.pts = pkt.dts;
275  } else {
277  if (((frames + 1) % gop_size) == 0) {
278  pkt.pts = pkt.dts + duration;
279  video_dts = pkt.pts;
280  } else {
281  next_p_pts = pkt.pts = pkt.dts + 2 * duration;
282  video_dts += duration;
283  }
284  }
285  }
286  if (!bframes)
287  pkt.pts = pkt.dts;
288  if (fake_pkt_duration)
290  frames++;
291  }
292 
293  if (clear_duration)
294  pkt.duration = 0;
295  AV_WB32(pktdata + 4, pkt.pts);
296  pkt.data = pktdata;
297  pkt.size = 8;
298  if (skip_write)
299  continue;
300  if (skip_write_audio && pkt.stream_index == 1)
301  continue;
302 
303  if (c) {
304  pkt.pts += (1LL<<32);
305  pkt.dts += (1LL<<32);
306  }
307 
308  if (do_interleave)
309  av_interleaved_write_frame(ctx, &pkt);
310  else
311  av_write_frame(ctx, &pkt);
312  }
313 }
314 
315 static void mux_gops(int n)
316 {
317  mux_frames(gop_size * n, 0);
318 }
319 
320 static void skip_gops(int n)
321 {
322  skip_write = 1;
323  mux_gops(n);
324  skip_write = 0;
325 }
326 
327 static void signal_init_ts(void)
328 {
329  AVPacket pkt;
330  av_init_packet(&pkt);
331  pkt.size = 0;
332  pkt.data = NULL;
333 
334  pkt.stream_index = 0;
335  pkt.dts = video_dts;
336  pkt.pts = 0;
337  av_write_frame(ctx, &pkt);
338 
339  pkt.stream_index = 1;
340  pkt.dts = pkt.pts = audio_dts;
341  av_write_frame(ctx, &pkt);
342 }
343 
344 static void finish(void)
345 {
346  av_write_trailer(ctx);
347  avio_context_free(&ctx->pb);
349  ctx = NULL;
350 }
351 
352 static void help(void)
353 {
354  printf("movenc-test [-w]\n"
355  "-w write output into files\n");
356 }
357 
358 int main(int argc, char **argv)
359 {
360  int c;
362  uint8_t content[HASH_SIZE];
363  int empty_moov_pos;
364  int prev_pos;
365 
366  for (;;) {
367  c = getopt(argc, argv, "wh");
368  if (c == -1)
369  break;
370  switch (c) {
371  case 'w':
372  write_file = 1;
373  break;
374  default:
375  case 'h':
376  help();
377  return 0;
378  }
379  }
380 
381  av_register_all();
382 
383  md5 = av_md5_alloc();
384  if (!md5)
385  return 1;
386 
387  // Write a fragmented file with an initial moov that actually contains some
388  // samples. One moov+mdat with 1 second of data and one moof+mdat with 1
389  // second of data.
390  init_out("non-empty-moov");
391  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
392  init(0, 0);
393  mux_gops(2);
394  finish();
395  close_out();
396 
397  // Write a similar file, but with B-frames and audio preroll, handled
398  // via an edit list.
399  init_out("non-empty-moov-elst");
400  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
401  av_dict_set(&opts, "use_editlist", "1", 0);
402  init(1, 1);
403  mux_gops(2);
404  finish();
405  close_out();
406 
407  // Use B-frames but no audio-preroll, but without an edit list.
408  // Due to avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO, the dts
409  // of the first audio packet is > 0, but it is set to zero since edit
410  // lists aren't used, increasing the duration of the first packet instead.
411  init_out("non-empty-moov-no-elst");
412  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
413  av_dict_set(&opts, "use_editlist", "0", 0);
414  init(1, 0);
415  mux_gops(2);
416  finish();
417  close_out();
418 
419  format = "ismv";
420  // Write an ISMV, with B-frames and audio preroll.
421  init_out("ismv");
422  av_dict_set(&opts, "movflags", "frag_keyframe", 0);
423  init(1, 1);
424  mux_gops(2);
425  finish();
426  close_out();
427  format = "mp4";
428 
429  // An initial moov that doesn't contain any samples, followed by two
430  // moof+mdat pairs.
431  init_out("empty-moov");
432  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
433  av_dict_set(&opts, "use_editlist", "0", 0);
434  init(0, 0);
435  mux_gops(2);
436  finish();
437  close_out();
438  memcpy(content, hash, HASH_SIZE);
439 
440  // Similar to the previous one, but with input that doesn't start at
441  // pts/dts 0. avoid_negative_ts behaves in the same way as
442  // in non-empty-moov-no-elst above.
443  init_out("empty-moov-no-elst");
444  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
445  init(1, 0);
446  mux_gops(2);
447  finish();
448  close_out();
449 
450  // Same as the previous one, but disable avoid_negative_ts (which
451  // would require using an edit list, but with empty_moov, one can't
452  // write a sensible edit list, when the start timestamps aren't known).
453  // This should trigger a warning - we check that the warning is produced.
455  init_out("empty-moov-no-elst-no-adjust");
456  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
457  av_dict_set(&opts, "avoid_negative_ts", "0", 0);
458  init(1, 0);
459  mux_gops(2);
460  finish();
461  close_out();
462 
464  check(num_warnings > 0, "No warnings printed for unhandled start offset");
465 
466  // Verify that delay_moov produces the same as empty_moov for
467  // simple input
468  init_out("delay-moov");
469  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
470  av_dict_set(&opts, "use_editlist", "0", 0);
471  init(0, 0);
472  mux_gops(2);
473  finish();
474  close_out();
475  check(!memcmp(hash, content, HASH_SIZE), "delay_moov differs from empty_moov");
476 
477  // Test writing content that requires an edit list using delay_moov
478  init_out("delay-moov-elst");
479  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
480  init(1, 1);
481  mux_gops(2);
482  finish();
483  close_out();
484 
485  // Test writing a file with one track lacking packets, with delay_moov.
486  skip_write_audio = 1;
487  init_out("delay-moov-empty-track");
488  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
489  init(0, 0);
490  mux_gops(2);
491  // The automatic flushing shouldn't output anything, since we're still
492  // waiting for data for some tracks
493  check(out_size == 0, "delay_moov flushed prematurely");
494  // When closed (or manually flushed), all the written data should still
495  // be output.
496  finish();
497  close_out();
498  check(out_size > 0, "delay_moov didn't output anything");
499 
500  // Check that manually flushing still outputs things as expected. This
501  // produces two fragments, while the one above produces only one.
502  init_out("delay-moov-empty-track-flush");
503  av_dict_set(&opts, "movflags", "frag_custom+delay_moov", 0);
504  init(0, 0);
505  mux_gops(1);
506  av_write_frame(ctx, NULL); // Force writing the moov
507  check(out_size > 0, "No moov written");
508  av_write_frame(ctx, NULL);
509  mux_gops(1);
510  av_write_frame(ctx, NULL);
511  finish();
512  close_out();
513 
514  skip_write_audio = 0;
515 
516 
517 
518  // Verify that the header written by delay_moov when manually flushed
519  // is identical to the one by empty_moov.
520  init_out("empty-moov-header");
521  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
522  av_dict_set(&opts, "use_editlist", "0", 0);
523  init(0, 0);
524  close_out();
525  memcpy(header, hash, HASH_SIZE);
526  init_out("empty-moov-content");
527  mux_gops(2);
528  // Written 2 seconds of content, with an automatic flush after 1 second.
529  check(out_size > 0, "No automatic flush?");
530  empty_moov_pos = prev_pos = out_size;
531  // Manually flush the second fragment
532  av_write_frame(ctx, NULL);
533  check(out_size > prev_pos, "No second fragment flushed?");
534  prev_pos = out_size;
535  // Check that an extra flush doesn't output any more data
536  av_write_frame(ctx, NULL);
537  check(out_size == prev_pos, "More data written?");
538  close_out();
539  memcpy(content, hash, HASH_SIZE);
540  // Ignore the trailer written here
541  finish();
542 
543  init_out("delay-moov-header");
544  av_dict_set(&opts, "movflags", "frag_custom+delay_moov", 0);
545  av_dict_set(&opts, "use_editlist", "0", 0);
546  init(0, 0);
547  check(out_size == 0, "Output written during init with delay_moov");
548  mux_gops(1); // Write 1 second of content
549  av_write_frame(ctx, NULL); // Force writing the moov
550  close_out();
551  check(!memcmp(hash, header, HASH_SIZE), "delay_moov header differs from empty_moov");
552  init_out("delay-moov-content");
553  av_write_frame(ctx, NULL); // Flush the first fragment
554  check(out_size == empty_moov_pos, "Manually flushed content differs from automatically flushed, %d vs %d", out_size, empty_moov_pos);
555  mux_gops(1); // Write the rest of the content
556  av_write_frame(ctx, NULL); // Flush the second fragment
557  close_out();
558  check(!memcmp(hash, content, HASH_SIZE), "delay_moov content differs from empty_moov");
559  finish();
560 
561 
562  // Verify that we can produce an identical second fragment without
563  // writing the first one. First write the reference fragments that
564  // we want to reproduce.
565  av_dict_set(&opts, "movflags", "frag_custom+empty_moov+dash", 0);
566  init(0, 0);
567  mux_gops(1);
568  av_write_frame(ctx, NULL); // Output the first fragment
569  init_out("empty-moov-second-frag");
570  mux_gops(1);
571  av_write_frame(ctx, NULL); // Output the second fragment
572  close_out();
573  memcpy(content, hash, HASH_SIZE);
574  finish();
575 
576  // Produce the same second fragment without actually writing the first
577  // one before.
578  av_dict_set(&opts, "movflags", "frag_custom+empty_moov+dash+frag_discont", 0);
579  av_dict_set(&opts, "fragment_index", "2", 0);
580  av_dict_set(&opts, "avoid_negative_ts", "0", 0);
581  av_dict_set(&opts, "use_editlist", "0", 0);
582  init(0, 0);
583  skip_gops(1);
584  init_out("empty-moov-second-frag-discont");
585  mux_gops(1);
586  av_write_frame(ctx, NULL); // Output the second fragment
587  close_out();
588  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
589  finish();
590 
591  // Produce the same thing by using delay_moov, which requires a slightly
592  // different call sequence.
593  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
594  av_dict_set(&opts, "fragment_index", "2", 0);
595  init(0, 0);
596  skip_gops(1);
597  mux_gops(1);
598  av_write_frame(ctx, NULL); // Output the moov
599  init_out("delay-moov-second-frag-discont");
600  av_write_frame(ctx, NULL); // Output the second fragment
601  close_out();
602  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
603  finish();
604 
605 
606  // Test discontinuously written fragments with B-frames (where the
607  // assumption of starting at pts=0 works) but not with audio preroll
608  // (which can't be guessed).
609  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
610  init(1, 0);
611  mux_gops(1);
612  init_out("delay-moov-elst-init");
613  av_write_frame(ctx, NULL); // Output the moov
614  close_out();
615  memcpy(header, hash, HASH_SIZE);
616  av_write_frame(ctx, NULL); // Output the first fragment
617  init_out("delay-moov-elst-second-frag");
618  mux_gops(1);
619  av_write_frame(ctx, NULL); // Output the second fragment
620  close_out();
621  memcpy(content, hash, HASH_SIZE);
622  finish();
623 
624  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
625  av_dict_set(&opts, "fragment_index", "2", 0);
626  init(1, 0);
627  skip_gops(1);
628  mux_gops(1); // Write the second fragment
629  init_out("delay-moov-elst-init-discont");
630  av_write_frame(ctx, NULL); // Output the moov
631  close_out();
632  check(!memcmp(hash, header, HASH_SIZE), "discontinuously written header differs");
633  init_out("delay-moov-elst-second-frag-discont");
634  av_write_frame(ctx, NULL); // Output the second fragment
635  close_out();
636  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
637  finish();
638 
639 
640  // Test discontinuously written fragments with B-frames and audio preroll,
641  // properly signaled.
642  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
643  init(1, 1);
644  mux_gops(1);
645  init_out("delay-moov-elst-signal-init");
646  av_write_frame(ctx, NULL); // Output the moov
647  close_out();
648  memcpy(header, hash, HASH_SIZE);
649  av_write_frame(ctx, NULL); // Output the first fragment
650  init_out("delay-moov-elst-signal-second-frag");
651  mux_gops(1);
652  av_write_frame(ctx, NULL); // Output the second fragment
653  close_out();
654  memcpy(content, hash, HASH_SIZE);
655  finish();
656 
657  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
658  av_dict_set(&opts, "fragment_index", "2", 0);
659  init(1, 1);
660  signal_init_ts();
661  skip_gops(1);
662  mux_gops(1); // Write the second fragment
663  init_out("delay-moov-elst-signal-init-discont");
664  av_write_frame(ctx, NULL); // Output the moov
665  close_out();
666  check(!memcmp(hash, header, HASH_SIZE), "discontinuously written header differs");
667  init_out("delay-moov-elst-signal-second-frag-discont");
668  av_write_frame(ctx, NULL); // Output the second fragment
669  close_out();
670  check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
671  finish();
672 
673 
674  // Test muxing discontinuous fragments with very large (> (1<<31)) timestamps.
675  av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
676  av_dict_set(&opts, "fragment_index", "2", 0);
677  init(1, 1);
678  signal_init_ts();
679  skip_gops(1);
680  mux_frames(gop_size, 1); // Write the second fragment
681  init_out("delay-moov-elst-signal-init-discont-largets");
682  av_write_frame(ctx, NULL); // Output the moov
683  close_out();
684  init_out("delay-moov-elst-signal-second-frag-discont-largets");
685  av_write_frame(ctx, NULL); // Output the second fragment
686  close_out();
687  finish();
688 
689  // Test VFR content, with sidx atoms (which declare the pts duration
690  // of a fragment, forcing overriding the start pts of the next one).
691  // Here, the fragment duration in pts is significantly different from
692  // the duration in dts. The video stream starts at dts=-10,pts=0, and
693  // the second fragment starts at dts=155,pts=156. The trun duration sum
694  // of the first fragment is 165, which also is written as
695  // baseMediaDecodeTime in the tfdt in the second fragment. The sidx for
696  // the first fragment says earliest_presentation_time = 0 and
697  // subsegment_duration = 156, which also matches the sidx in the second
698  // fragment. For the audio stream, the pts and dts durations also don't
699  // match - the input stream starts at pts=-2048, but that part is excluded
700  // by the edit list.
701  init_out("vfr");
702  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+dash", 0);
703  init_fps(1, 1, 3);
704  mux_frames(gop_size/2, 0);
705  duration /= 10;
706  mux_frames(gop_size/2, 0);
707  mux_gops(1);
708  finish();
709  close_out();
710 
711  // Test VFR content, with cleared duration fields. In these cases,
712  // the muxer must guess the duration of the last packet of each
713  // fragment. As long as the framerate doesn't vary (too much) at the
714  // fragment edge, it works just fine. Additionally, when automatically
715  // cutting fragments, the muxer already know the timestamps of the next
716  // packet for one stream (in most cases the video stream), avoiding
717  // having to use guesses for that one.
719  clear_duration = 1;
720  init_out("vfr-noduration");
721  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+dash", 0);
722  init_fps(1, 1, 3);
723  mux_frames(gop_size/2, 0);
724  duration /= 10;
725  mux_frames(gop_size/2, 0);
726  mux_gops(1);
727  finish();
728  close_out();
729  clear_duration = 0;
731  check(num_warnings > 0, "No warnings printed for filled in durations");
732 
733  // Test with an IO buffer size that is too small to hold a full fragment;
734  // this will cause write_data_type to be called with the type unknown.
735  force_iobuf_size = 1500;
736  init_out("large_frag");
737  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
738  init_fps(1, 1, 3);
739  mux_gops(2);
740  finish();
741  close_out();
742  force_iobuf_size = 0;
743 
744  // Test VFR content with bframes with interleaving.
745  // Here, using av_interleaved_write_frame allows the muxer to get the
746  // fragment end durations right. We always set the packet duration to
747  // the expected, but we simulate dropped frames at one point.
748  do_interleave = 1;
749  init_out("vfr-noduration-interleave");
750  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
751  av_dict_set(&opts, "frag_duration", "650000", 0);
752  init_fps(1, 1, 30);
753  mux_frames(gop_size/2, 0);
754  // Pretend that the packet duration is the normal, even if
755  // we actually skip a bunch of frames. (I.e., simulate that
756  // we don't know of the framedrop in advance.)
758  duration *= 10;
759  mux_frames(1, 0);
760  fake_pkt_duration = 0;
761  duration /= 10;
762  mux_frames(gop_size/2 - 1, 0);
763  mux_gops(1);
764  finish();
765  close_out();
766  clear_duration = 0;
767  do_interleave = 0;
768 
769  // Write a fragmented file with b-frames and audio preroll,
770  // with negative cts values, removing the edit list for the
771  // video track.
772  init_out("delay-moov-elst-neg-cts");
773  av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+negative_cts_offsets", 0);
774  init(1, 1);
775  mux_gops(2);
776  finish();
777  close_out();
778 
779  // Write a fragmented file with b-frames without audio preroll,
780  // with negative cts values, avoiding any edit lists, allowing
781  // to use empty_moov instead of delay_moov.
782  init_out("empty-moov-neg-cts");
783  av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov+negative_cts_offsets", 0);
784  init(1, 0);
785  mux_gops(2);
786  finish();
787  close_out();
788 
789  av_free(md5);
790 
791  return check_faults > 0 ? 1 : 0;
792 }
#define NULL
Definition: coverity.c:32
int64_t video_dts
Definition: movenc.c:60
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1239
int skip_write
Definition: movenc.c:69
static const uint8_t h264_extradata[]
Definition: movenc.c:39
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:927
const char * fmt
Definition: avisynth_c.h:769
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int bframes
Definition: movenc.c:62
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4152
int num
Numerator.
Definition: rational.h:59
static void count_warnings(void *avcl, int level, const char *fmt, va_list vl)
Definition: movenc.c:81
int size
Definition: avcodec.h:1680
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:661
int out_size
Definition: movenc.c:55
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
static AVPacket pkt
int num_warnings
Definition: movenc.c:76
static void mux_frames(int n, int c)
Definition: movenc.c:246
int fake_pkt_duration
Definition: movenc.c:74
enum AVPictureType last_picture
Definition: movenc.c:68
static int io_write_data_type(void *opaque, uint8_t *buf, int size, enum AVIODataMarkerType type, int64_t time)
Definition: movenc.c:107
void av_md5_update(AVMD5 *ctx, const uint8_t *src, int len)
Update hash value.
Definition: md5.c:154
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:1349
const char * cur_name
Definition: movenc.c:53
int64_t audio_dts
Definition: movenc.c:60
struct AVMD5 * av_md5_alloc(void)
Allocate an AVMD5 context.
Definition: md5.c:48
uint8_t
int width
Video only.
Definition: avcodec.h:4218
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1697
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4367
int64_t duration
Definition: movenc.c:63
A point in the output bytestream where a demuxer can start parsing (for non self synchronizing bytest...
Definition: avio.h:128
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
struct AVMD5 * md5
Definition: movenc.c:56
static void finish(void)
Definition: movenc.c:344
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1460
uint8_t * data
Definition: avcodec.h:1679
static void reset_count_warnings(void)
Definition: movenc.c:93
ptrdiff_t size
Definition: opengl_enc.c:101
static const uint8_t header[24]
Definition: sdr2.c:67
Definition: md5.c:40
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1477
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1368
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1711
uint8_t hash[HASH_SIZE]
Definition: movenc.c:57
uint8_t iobuf[32768]
Definition: movenc.c:49
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:129
AVStream * video_st
Definition: movenc.c:59
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4148
Definition: graph2dot.c:48
void av_log_default_callback(void *ptr, int level, const char *fmt, va_list vl)
Default logging callback.
Definition: log.c:302
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1685
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 extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:4170
int gop_size
Definition: movenc.c:66
int(* write_data_type)(void *opaque, uint8_t *buf, int buf_size, enum AVIODataMarkerType type, int64_t time)
A callback that is used instead of write_packet.
Definition: avio.h:320
static void init_fps(int bf, int audio_preroll, int fps)
Definition: movenc.c:177
AVDictionary * opts
Definition: movenc.c:50
#define HASH_SIZE
Definition: movenc.c:37
This is any, unlabelled data.
Definition: avio.h:135
av_warn_unused_result 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:528
void av_log_set_callback(void(*callback)(void *, int, const char *, va_list))
Set the logging callback.
Definition: log.c:406
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
AVIODataMarkerType
Different data types that can be returned via the AVIO write_data_type callback.
Definition: avio.h:111
AVFormatContext * ctx
Definition: movenc.c:48
int n
Definition: avisynth_c.h:684
int force_iobuf_size
Definition: movenc.c:72
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:98
int frames
Definition: movenc.c:65
int write_file
Definition: movenc.c:52
int64_t next_p_pts
Definition: movenc.c:67
static void mux_gops(int n)
Definition: movenc.c:315
int64_t audio_duration
Definition: movenc.c:64
static void help(void)
Definition: movenc.c:352
Stream structure.
Definition: avformat.h:889
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
AVStream * audio_st
Definition: movenc.c:59
static void close_out(void)
Definition: movenc.c:151
static int getopt(int argc, char *argv[], char *opts)
Definition: getopt.c:41
void av_md5_init(AVMD5 *ctx)
Initialize MD5 hashing.
Definition: md5.c:143
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
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
static const char * format
Definition: movenc.c:47
#define AV_WB32(p, v)
Definition: intreadwrite.h:424
AVPictureType
Definition: avutil.h:272
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4302
void av_md5_final(AVMD5 *ctx, uint8_t *dst)
Finish hashing and output digest value.
Definition: md5.c:192
static void init_out(const char *name)
Definition: movenc.c:136
#define check(value,...)
Definition: movenc.c:175
int skip_write_audio
Definition: movenc.c:70
int do_interleave
Definition: movenc.c:73
uint8_t level
Definition: svq3.c:207
static void init_count_warnings(void)
Definition: movenc.c:87
int check_faults
Definition: movenc.c:78
int sample_rate
Audio only.
Definition: avcodec.h:4262
Main libavformat public API header.
int clear_duration
Definition: movenc.c:71
static double c[64]
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:146
int main(int argc, char **argv)
Definition: movenc.c:358
Bi-dir predicted.
Definition: avutil.h:276
static void init(int bf, int audio_preroll)
Definition: movenc.c:241
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
static void signal_init_ts(void)
Definition: movenc.c:327
int den
Denominator.
Definition: rational.h:60
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:777
static void skip_gops(int n)
Definition: movenc.c:320
A point in the output bytestream where a decoder can start decoding (i.e.
Definition: avio.h:122
#define av_free(p)
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:4166
int channels
Audio only.
Definition: avcodec.h:4258
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1678
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1301
static int io_write(void *opaque, uint8_t *buf, int size)
Definition: movenc.c:98
FILE * out
Definition: movenc.c:54
Public header for MD5 hash function implementation.
AVCodecParameters * codecpar
Definition: avformat.h:1252
static const uint8_t aac_extradata[]
Definition: movenc.c:42
int stream_index
Definition: avcodec.h:1681
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
This structure stores compressed data.
Definition: avcodec.h:1656
void av_register_all(void)
Initialize libavformat and register all the muxers, demuxers and protocols.
Definition: allformats.c:390
static void check_func(int value, int line, const char *msg,...)
Definition: movenc.c:163
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1672
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
Predicted.
Definition: avutil.h:275
const char * name
Definition: opengl_enc.c:103