FFmpeg  4.2.1
segment.c
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1 /*
2  * Copyright (c) 2011, Luca Barbato
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 /**
22  * @file generic segmenter
23  * M3U8 specification can be find here:
24  * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming}
25  */
26 
27 #include <float.h>
28 #include <time.h>
29 
30 #include "avformat.h"
31 #include "avio_internal.h"
32 #include "internal.h"
33 
34 #include "libavutil/avassert.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/log.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/mathematics.h"
41 #include "libavutil/time.h"
42 #include "libavutil/timecode.h"
44 #include "libavutil/timestamp.h"
45 
46 typedef struct SegmentListEntry {
47  int index;
49  int64_t start_pts;
50  int64_t offset_pts;
51  char *filename;
53  int64_t last_duration;
55 
56 typedef enum {
61  LIST_TYPE_EXT, ///< deprecated
64 } ListType;
65 
66 #define SEGMENT_LIST_FLAG_CACHE 1
67 #define SEGMENT_LIST_FLAG_LIVE 2
68 
69 typedef struct SegmentContext {
70  const AVClass *class; /**< Class for private options. */
71  int segment_idx; ///< index of the segment file to write, starting from 0
72  int segment_idx_wrap; ///< number after which the index wraps
73  int segment_idx_wrap_nb; ///< number of time the index has wraped
74  int segment_count; ///< number of segment files already written
77  char *format; ///< format to use for output segment files
78  char *format_options_str; ///< format options to use for output segment files
80  char *list; ///< filename for the segment list file
81  int list_flags; ///< flags affecting list generation
82  int list_size; ///< number of entries for the segment list file
83 
84  int use_clocktime; ///< flag to cut segments at regular clock time
85  int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time
86  int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment
87  int64_t last_val; ///< remember last time for wrap around detection
89  int header_written; ///< whether we've already called avformat_write_header
90 
91  char *entry_prefix; ///< prefix to add to list entry filenames
92  int list_type; ///< set the list type
93  AVIOContext *list_pb; ///< list file put-byte context
94  char *time_str; ///< segment duration specification string
95  int64_t time; ///< segment duration
96  int use_strftime; ///< flag to expand filename with strftime
97  int increment_tc; ///< flag to increment timecode if found
98 
99  char *times_str; ///< segment times specification string
100  int64_t *times; ///< list of segment interval specification
101  int nb_times; ///< number of elments in the times array
102 
103  char *frames_str; ///< segment frame numbers specification string
104  int *frames; ///< list of frame number specification
105  int nb_frames; ///< number of elments in the frames array
106  int frame_count; ///< total number of reference frames
107  int segment_frame_count; ///< number of reference frames in the segment
108 
109  int64_t time_delta;
110  int individual_header_trailer; /**< Set by a private option. */
111  int write_header_trailer; /**< Set by a private option. */
112  char *header_filename; ///< filename to write the output header to
113 
114  int reset_timestamps; ///< reset timestamps at the beginning of each segment
115  int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
116  char *reference_stream_specifier; ///< reference stream specifier
120 
122  char temp_list_filename[1024];
123 
128 
129 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
130 {
131  int needs_quoting = !!str[strcspn(str, "\",\n\r")];
132 
133  if (needs_quoting)
134  avio_w8(ctx, '"');
135 
136  for (; *str; str++) {
137  if (*str == '"')
138  avio_w8(ctx, '"');
139  avio_w8(ctx, *str);
140  }
141  if (needs_quoting)
142  avio_w8(ctx, '"');
143 }
144 
146 {
147  SegmentContext *seg = s->priv_data;
148  AVFormatContext *oc;
149  int i;
150  int ret;
151 
152  ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL);
153  if (ret < 0)
154  return ret;
155  oc = seg->avf;
156 
158  oc->max_delay = s->max_delay;
159  av_dict_copy(&oc->metadata, s->metadata, 0);
160  oc->opaque = s->opaque;
161  oc->io_close = s->io_close;
162  oc->io_open = s->io_open;
163  oc->flags = s->flags;
164 
165  for (i = 0; i < s->nb_streams; i++) {
166  AVStream *st;
167  AVCodecParameters *ipar, *opar;
168 
169  if (!(st = avformat_new_stream(oc, NULL)))
170  return AVERROR(ENOMEM);
171  ipar = s->streams[i]->codecpar;
172  opar = st->codecpar;
173  avcodec_parameters_copy(opar, ipar);
174  if (!oc->oformat->codec_tag ||
175  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
176  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
177  opar->codec_tag = ipar->codec_tag;
178  } else {
179  opar->codec_tag = 0;
180  }
182  st->time_base = s->streams[i]->time_base;
184 #if FF_API_LAVF_AVCTX
186  if (s->streams[i]->codecpar->codec_tag == MKTAG('t','m','c','d'))
187  st->codec->time_base = s->streams[i]->codec->time_base;
189 #endif
190  av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
191  }
192 
193  return 0;
194 }
195 
197 {
198  SegmentContext *seg = s->priv_data;
199  AVFormatContext *oc = seg->avf;
200  size_t size;
201  int ret;
202  char buf[1024];
203  char *new_name;
204 
205  if (seg->segment_idx_wrap)
206  seg->segment_idx %= seg->segment_idx_wrap;
207  if (seg->use_strftime) {
208  time_t now0;
209  struct tm *tm, tmpbuf;
210  time(&now0);
211  tm = localtime_r(&now0, &tmpbuf);
212  if (!strftime(buf, sizeof(buf), s->url, tm)) {
213  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
214  return AVERROR(EINVAL);
215  }
216  } else if (av_get_frame_filename(buf, sizeof(buf),
217  s->url, seg->segment_idx) < 0) {
218  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->url);
219  return AVERROR(EINVAL);
220  }
221  new_name = av_strdup(buf);
222  if (!new_name)
223  return AVERROR(ENOMEM);
224  ff_format_set_url(oc, new_name);
225 
226  /* copy modified name in list entry */
227  size = strlen(av_basename(oc->url)) + 1;
228  if (seg->entry_prefix)
229  size += strlen(seg->entry_prefix);
230 
231  if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
232  return ret;
233  snprintf(seg->cur_entry.filename, size, "%s%s",
234  seg->entry_prefix ? seg->entry_prefix : "",
235  av_basename(oc->url));
236 
237  return 0;
238 }
239 
241 {
242  SegmentContext *seg = s->priv_data;
243  AVFormatContext *oc = seg->avf;
244  int err = 0;
245 
246  if (write_header) {
248  seg->avf = NULL;
249  if ((err = segment_mux_init(s)) < 0)
250  return err;
251  oc = seg->avf;
252  }
253 
254  seg->segment_idx++;
255  if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
256  seg->segment_idx_wrap_nb++;
257 
258  if ((err = set_segment_filename(s)) < 0)
259  return err;
260 
261  if ((err = s->io_open(s, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) {
262  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
263  return err;
264  }
265  if (!seg->individual_header_trailer)
266  oc->pb->seekable = 0;
267 
268  if (oc->oformat->priv_class && oc->priv_data)
269  av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
270 
271  if (write_header) {
273  av_dict_copy(&options, seg->format_options, 0);
274  av_dict_set(&options, "fflags", "-autobsf", 0);
275  err = avformat_write_header(oc, &options);
276  av_dict_free(&options);
277  if (err < 0)
278  return err;
279  }
280 
281  seg->segment_frame_count = 0;
282  return 0;
283 }
284 
286 {
287  SegmentContext *seg = s->priv_data;
288  int ret;
289 
290  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
291  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
292  if (ret < 0) {
293  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
294  return ret;
295  }
296 
297  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
298  SegmentListEntry *entry;
299  double max_duration = 0;
300 
301  avio_printf(seg->list_pb, "#EXTM3U\n");
302  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
303  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
304  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
305  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
306 
307  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
309 
310  for (entry = seg->segment_list_entries; entry; entry = entry->next)
311  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
312  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
313  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
314  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
315  }
316 
317  return ret;
318 }
319 
320 static void segment_list_print_entry(AVIOContext *list_ioctx,
321  ListType list_type,
322  const SegmentListEntry *list_entry,
323  void *log_ctx)
324 {
325  switch (list_type) {
326  case LIST_TYPE_FLAT:
327  avio_printf(list_ioctx, "%s\n", list_entry->filename);
328  break;
329  case LIST_TYPE_CSV:
330  case LIST_TYPE_EXT:
331  print_csv_escaped_str(list_ioctx, list_entry->filename);
332  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
333  break;
334  case LIST_TYPE_M3U8:
335  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
336  list_entry->end_time - list_entry->start_time, list_entry->filename);
337  break;
338  case LIST_TYPE_FFCONCAT:
339  {
340  char *buf;
341  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
342  av_log(log_ctx, AV_LOG_WARNING,
343  "Error writing list entry '%s' in list file\n", list_entry->filename);
344  return;
345  }
346  avio_printf(list_ioctx, "file %s\n", buf);
347  av_free(buf);
348  break;
349  }
350  default:
351  av_assert0(!"Invalid list type");
352  }
353 }
354 
355 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
356 {
357  SegmentContext *seg = s->priv_data;
358  AVFormatContext *oc = seg->avf;
359  int ret = 0;
360  AVTimecode tc;
361  AVRational rate;
362  AVDictionaryEntry *tcr;
364  int i;
365  int err;
366 
367  if (!oc || !oc->pb)
368  return AVERROR(EINVAL);
369 
370  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
371  if (write_trailer)
372  ret = av_write_trailer(oc);
373 
374  if (ret < 0)
375  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
376  oc->url);
377 
378  if (seg->list) {
379  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
380  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
381  if (!entry) {
382  ret = AVERROR(ENOMEM);
383  goto end;
384  }
385 
386  /* append new element */
387  memcpy(entry, &seg->cur_entry, sizeof(*entry));
388  entry->filename = av_strdup(entry->filename);
389  if (!seg->segment_list_entries)
391  else
392  seg->segment_list_entries_end->next = entry;
393  seg->segment_list_entries_end = entry;
394 
395  /* drop first item */
396  if (seg->list_size && seg->segment_count >= seg->list_size) {
397  entry = seg->segment_list_entries;
399  av_freep(&entry->filename);
400  av_freep(&entry);
401  }
402 
403  if ((ret = segment_list_open(s)) < 0)
404  goto end;
405  for (entry = seg->segment_list_entries; entry; entry = entry->next)
406  segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
407  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
408  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
409  ff_format_io_close(s, &seg->list_pb);
410  if (seg->use_rename)
411  ff_rename(seg->temp_list_filename, seg->list, s);
412  } else {
413  segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
414  avio_flush(seg->list_pb);
415  }
416  }
417 
418  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
419  seg->avf->url, seg->segment_count);
420  seg->segment_count++;
421 
422  if (seg->increment_tc) {
423  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
424  if (tcr) {
425  /* search the first video stream */
426  for (i = 0; i < s->nb_streams; i++) {
428  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
429  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
430  if (err < 0) {
431  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, error occurred during timecode creation.\n");
432  break;
433  }
434  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
435  av_dict_set(&s->metadata, "timecode",
436  av_timecode_make_string(&tc, buf, 0), 0);
437  break;
438  }
439  }
440  } else {
441  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, no global timecode metadata found.\n");
442  }
443  for (i = 0; i < s->nb_streams; i++) {
445  char st_buf[AV_TIMECODE_STR_SIZE];
446  AVTimecode st_tc;
447  AVRational st_rate = s->streams[i]->avg_frame_rate;
448  AVDictionaryEntry *st_tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0);
449  if (st_tcr) {
450  if ((av_timecode_init_from_string(&st_tc, st_rate, st_tcr->value, s) < 0)) {
451  av_log(s, AV_LOG_WARNING, "Could not increment stream %d timecode, error occurred during timecode creation.\n", i);
452  continue;
453  }
454  st_tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(st_rate)); // increment timecode
455  av_dict_set(&s->streams[i]->metadata, "timecode", av_timecode_make_string(&st_tc, st_buf, 0), 0);
456  }
457  }
458  }
459  }
460 
461 end:
462  ff_format_io_close(oc, &oc->pb);
463 
464  return ret;
465 }
466 
467 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
468  const char *times_str)
469 {
470  char *p;
471  int i, ret = 0;
472  char *times_str1 = av_strdup(times_str);
473  char *saveptr = NULL;
474 
475  if (!times_str1)
476  return AVERROR(ENOMEM);
477 
478 #define FAIL(err) ret = err; goto end
479 
480  *nb_times = 1;
481  for (p = times_str1; *p; p++)
482  if (*p == ',')
483  (*nb_times)++;
484 
485  *times = av_malloc_array(*nb_times, sizeof(**times));
486  if (!*times) {
487  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
488  FAIL(AVERROR(ENOMEM));
489  }
490 
491  p = times_str1;
492  for (i = 0; i < *nb_times; i++) {
493  int64_t t;
494  char *tstr = av_strtok(p, ",", &saveptr);
495  p = NULL;
496 
497  if (!tstr || !tstr[0]) {
498  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
499  times_str);
500  FAIL(AVERROR(EINVAL));
501  }
502 
503  ret = av_parse_time(&t, tstr, 1);
504  if (ret < 0) {
505  av_log(log_ctx, AV_LOG_ERROR,
506  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
507  FAIL(AVERROR(EINVAL));
508  }
509  (*times)[i] = t;
510 
511  /* check on monotonicity */
512  if (i && (*times)[i-1] > (*times)[i]) {
513  av_log(log_ctx, AV_LOG_ERROR,
514  "Specified time %f is greater than the following time %f\n",
515  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
516  FAIL(AVERROR(EINVAL));
517  }
518  }
519 
520 end:
521  av_free(times_str1);
522  return ret;
523 }
524 
525 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
526  const char *frames_str)
527 {
528  char *p;
529  int i, ret = 0;
530  char *frames_str1 = av_strdup(frames_str);
531  char *saveptr = NULL;
532 
533  if (!frames_str1)
534  return AVERROR(ENOMEM);
535 
536 #define FAIL(err) ret = err; goto end
537 
538  *nb_frames = 1;
539  for (p = frames_str1; *p; p++)
540  if (*p == ',')
541  (*nb_frames)++;
542 
543  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
544  if (!*frames) {
545  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
546  FAIL(AVERROR(ENOMEM));
547  }
548 
549  p = frames_str1;
550  for (i = 0; i < *nb_frames; i++) {
551  long int f;
552  char *tailptr;
553  char *fstr = av_strtok(p, ",", &saveptr);
554 
555  p = NULL;
556  if (!fstr) {
557  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
558  frames_str);
559  FAIL(AVERROR(EINVAL));
560  }
561  f = strtol(fstr, &tailptr, 10);
562  if (*tailptr || f <= 0 || f >= INT_MAX) {
563  av_log(log_ctx, AV_LOG_ERROR,
564  "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
565  fstr);
566  FAIL(AVERROR(EINVAL));
567  }
568  (*frames)[i] = f;
569 
570  /* check on monotonicity */
571  if (i && (*frames)[i-1] > (*frames)[i]) {
572  av_log(log_ctx, AV_LOG_ERROR,
573  "Specified frame %d is greater than the following frame %d\n",
574  (*frames)[i], (*frames)[i-1]);
575  FAIL(AVERROR(EINVAL));
576  }
577  }
578 
579 end:
580  av_free(frames_str1);
581  return ret;
582 }
583 
585 {
586  int buf_size = 32768;
587  uint8_t *buf = av_malloc(buf_size);
588  if (!buf)
589  return AVERROR(ENOMEM);
590  *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
591  if (!*ctx) {
592  av_free(buf);
593  return AVERROR(ENOMEM);
594  }
595  return 0;
596 }
597 
598 static void close_null_ctxp(AVIOContext **pb)
599 {
600  av_freep(&(*pb)->buffer);
601  avio_context_free(pb);
602 }
603 
605 {
606  SegmentContext *seg = s->priv_data;
607  int ret, i;
608 
609  seg->reference_stream_index = -1;
610  if (!strcmp(seg->reference_stream_specifier, "auto")) {
611  /* select first index of type with highest priority */
612  int type_index_map[AVMEDIA_TYPE_NB];
613  static const enum AVMediaType type_priority_list[] = {
619  };
620  enum AVMediaType type;
621 
622  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
623  type_index_map[i] = -1;
624 
625  /* select first index for each type */
626  for (i = 0; i < s->nb_streams; i++) {
627  type = s->streams[i]->codecpar->codec_type;
628  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
629  /* ignore attached pictures/cover art streams */
631  type_index_map[type] = i;
632  }
633 
634  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
635  type = type_priority_list[i];
636  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
637  break;
638  }
639  } else {
640  for (i = 0; i < s->nb_streams; i++) {
643  if (ret < 0)
644  return ret;
645  if (ret > 0) {
646  seg->reference_stream_index = i;
647  break;
648  }
649  }
650  }
651 
652  if (seg->reference_stream_index < 0) {
653  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
655  return AVERROR(EINVAL);
656  }
657 
658  return 0;
659 }
660 
662 {
663  SegmentContext *seg = s->priv_data;
664  ff_format_io_close(seg->avf, &seg->list_pb);
666  seg->avf = NULL;
667 }
668 
670 {
671  SegmentContext *seg = s->priv_data;
672  AVFormatContext *oc = seg->avf;
674  int ret;
675  int i;
676 
677  seg->segment_count = 0;
678  if (!seg->write_header_trailer)
679  seg->individual_header_trailer = 0;
680 
681  if (seg->header_filename) {
682  seg->write_header_trailer = 1;
683  seg->individual_header_trailer = 0;
684  }
685 
686  if (seg->initial_offset > 0) {
687  av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
688  "you can use output_ts_offset instead of it\n");
689  }
690 
691  if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
692  av_log(s, AV_LOG_ERROR,
693  "segment_time, segment_times, and segment_frames options "
694  "are mutually exclusive, select just one of them\n");
695  return AVERROR(EINVAL);
696  }
697 
698  if (seg->times_str) {
699  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
700  return ret;
701  } else if (seg->frames_str) {
702  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
703  return ret;
704  } else {
705  /* set default value if not specified */
706  if (!seg->time_str)
707  seg->time_str = av_strdup("2");
708  if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
709  av_log(s, AV_LOG_ERROR,
710  "Invalid time duration specification '%s' for segment_time option\n",
711  seg->time_str);
712  return ret;
713  }
714  if (seg->use_clocktime) {
715  if (seg->time <= 0) {
716  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
717  return AVERROR(EINVAL);
718  }
719  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
720  }
721  }
722 
723  if (seg->format_options_str) {
724  ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
725  if (ret < 0) {
726  av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
727  seg->format_options_str);
728  return ret;
729  }
730  }
731 
732  if (seg->list) {
733  if (seg->list_type == LIST_TYPE_UNDEFINED) {
734  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
735  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
736  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
737  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
738  else seg->list_type = LIST_TYPE_FLAT;
739  }
740  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
741  if ((ret = segment_list_open(s)) < 0)
742  return ret;
743  } else {
744  const char *proto = avio_find_protocol_name(seg->list);
745  seg->use_rename = proto && !strcmp(proto, "file");
746  }
747  }
748 
749  if (seg->list_type == LIST_TYPE_EXT)
750  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
751 
752  if ((ret = select_reference_stream(s)) < 0)
753  return ret;
754  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
757 
758  seg->oformat = av_guess_format(seg->format, s->url, NULL);
759 
760  if (!seg->oformat)
762  if (seg->oformat->flags & AVFMT_NOFILE) {
763  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
764  seg->oformat->name);
765  return AVERROR(EINVAL);
766  }
767 
768  if ((ret = segment_mux_init(s)) < 0)
769  return ret;
770 
771  if ((ret = set_segment_filename(s)) < 0)
772  return ret;
773  oc = seg->avf;
774 
775  if (seg->write_header_trailer) {
776  if ((ret = s->io_open(s, &oc->pb,
777  seg->header_filename ? seg->header_filename : oc->url,
778  AVIO_FLAG_WRITE, NULL)) < 0) {
779  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
780  return ret;
781  }
782  if (!seg->individual_header_trailer)
783  oc->pb->seekable = 0;
784  } else {
785  if ((ret = open_null_ctx(&oc->pb)) < 0)
786  return ret;
787  }
788 
789  av_dict_copy(&options, seg->format_options, 0);
790  av_dict_set(&options, "fflags", "-autobsf", 0);
791  ret = avformat_init_output(oc, &options);
792  if (av_dict_count(options)) {
793  av_log(s, AV_LOG_ERROR,
794  "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
795  av_dict_free(&options);
796  return AVERROR(EINVAL);
797  }
798  av_dict_free(&options);
799 
800  if (ret < 0) {
801  ff_format_io_close(oc, &oc->pb);
802  return ret;
803  }
804  seg->segment_frame_count = 0;
805 
806  av_assert0(s->nb_streams == oc->nb_streams);
807  if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) {
808  ret = avformat_write_header(oc, NULL);
809  if (ret < 0)
810  return ret;
811  seg->header_written = 1;
812  }
813 
814  for (i = 0; i < s->nb_streams; i++) {
815  AVStream *inner_st = oc->streams[i];
816  AVStream *outer_st = s->streams[i];
817  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
818  }
819 
820  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
821  s->avoid_negative_ts = 1;
822 
823  return ret;
824 }
825 
827 {
828  SegmentContext *seg = s->priv_data;
829  AVFormatContext *oc = seg->avf;
830  int ret, i;
831 
832  if (!seg->header_written) {
833  for (i = 0; i < s->nb_streams; i++) {
834  AVStream *st = oc->streams[i];
835  AVCodecParameters *ipar, *opar;
836 
837  ipar = s->streams[i]->codecpar;
838  opar = oc->streams[i]->codecpar;
839  avcodec_parameters_copy(opar, ipar);
840  if (!oc->oformat->codec_tag ||
841  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
842  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
843  opar->codec_tag = ipar->codec_tag;
844  } else {
845  opar->codec_tag = 0;
846  }
848  st->time_base = s->streams[i]->time_base;
849  }
850  ret = avformat_write_header(oc, NULL);
851  if (ret < 0)
852  return ret;
853  }
854 
855  if (!seg->write_header_trailer || seg->header_filename) {
856  if (seg->header_filename) {
857  av_write_frame(oc, NULL);
858  ff_format_io_close(oc, &oc->pb);
859  } else {
860  close_null_ctxp(&oc->pb);
861  }
862  if ((ret = oc->io_open(oc, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0)
863  return ret;
864  if (!seg->individual_header_trailer)
865  oc->pb->seekable = 0;
866  }
867 
868  return 0;
869 }
870 
872 {
873  SegmentContext *seg = s->priv_data;
874  AVStream *st = s->streams[pkt->stream_index];
875  int64_t end_pts = INT64_MAX, offset;
876  int start_frame = INT_MAX;
877  int ret;
878  struct tm ti;
879  int64_t usecs;
880  int64_t wrapped_val;
881 
882  if (!seg->avf || !seg->avf->pb)
883  return AVERROR(EINVAL);
884 
885  if (!st->codecpar->extradata_size) {
886  int pkt_extradata_size = 0;
887  uint8_t *pkt_extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &pkt_extradata_size);
888  if (pkt_extradata && pkt_extradata_size > 0) {
889  ret = ff_alloc_extradata(st->codecpar, pkt_extradata_size);
890  if (ret < 0) {
891  av_log(s, AV_LOG_WARNING, "Unable to add extradata to stream. Output segments may be invalid.\n");
892  goto calc_times;
893  }
894  memcpy(st->codecpar->extradata, pkt_extradata, pkt_extradata_size);
895  st->codecpar->extradata_size = pkt_extradata_size;
896  }
897  }
898 
899 calc_times:
900  if (seg->times) {
901  end_pts = seg->segment_count < seg->nb_times ?
902  seg->times[seg->segment_count] : INT64_MAX;
903  } else if (seg->frames) {
904  start_frame = seg->segment_count < seg->nb_frames ?
905  seg->frames[seg->segment_count] : INT_MAX;
906  } else {
907  if (seg->use_clocktime) {
908  int64_t avgt = av_gettime();
909  time_t sec = avgt / 1000000;
910  localtime_r(&sec, &ti);
911  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
912  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
913  if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
914  seg->cut_pending = 1;
915  seg->last_val = wrapped_val;
916  } else {
917  end_pts = seg->time * (seg->segment_count + 1);
918  }
919  }
920 
921  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
922  pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
923  av_ts2timestr(pkt->duration, &st->time_base),
924  pkt->flags & AV_PKT_FLAG_KEY,
925  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
926 
927  if (pkt->stream_index == seg->reference_stream_index &&
928  (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
929  (seg->segment_frame_count > 0 || seg->write_empty) &&
930  (seg->cut_pending || seg->frame_count >= start_frame ||
931  (pkt->pts != AV_NOPTS_VALUE &&
932  av_compare_ts(pkt->pts, st->time_base,
933  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
934  /* sanitize end time in case last packet didn't have a defined duration */
935  if (seg->cur_entry.last_duration == 0)
936  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
937 
938  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
939  goto fail;
940 
941  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
942  goto fail;
943 
944  seg->cut_pending = 0;
946  seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
949 
950  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
951  goto calc_times;
952  }
953 
954  if (pkt->stream_index == seg->reference_stream_index) {
955  if (pkt->pts != AV_NOPTS_VALUE)
956  seg->cur_entry.end_time =
957  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
958  seg->cur_entry.last_duration = pkt->duration;
959  }
960 
961  if (seg->segment_frame_count == 0) {
962  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
963  seg->avf->url, pkt->stream_index,
964  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
965  }
966 
967  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
968  pkt->stream_index,
970  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
971  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
972 
973  /* compute new timestamps */
974  offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
976  if (pkt->pts != AV_NOPTS_VALUE)
977  pkt->pts += offset;
978  if (pkt->dts != AV_NOPTS_VALUE)
979  pkt->dts += offset;
980 
981  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
982  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
983  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
984 
985  ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
986 
987 fail:
988  if (pkt->stream_index == seg->reference_stream_index) {
989  seg->frame_count++;
990  seg->segment_frame_count++;
991  }
992 
993  return ret;
994 }
995 
997 {
998  SegmentContext *seg = s->priv_data;
999  AVFormatContext *oc = seg->avf;
1000  SegmentListEntry *cur, *next;
1001  int ret = 0;
1002 
1003  if (!oc)
1004  goto fail;
1005 
1006  if (!seg->write_header_trailer) {
1007  if ((ret = segment_end(s, 0, 1)) < 0)
1008  goto fail;
1009  if ((ret = open_null_ctx(&oc->pb)) < 0)
1010  goto fail;
1011  ret = av_write_trailer(oc);
1012  close_null_ctxp(&oc->pb);
1013  } else {
1014  ret = segment_end(s, 1, 1);
1015  }
1016 fail:
1017  if (seg->list)
1018  ff_format_io_close(s, &seg->list_pb);
1019 
1021  av_opt_free(seg);
1022  av_freep(&seg->times);
1023  av_freep(&seg->frames);
1024  av_freep(&seg->cur_entry.filename);
1025 
1026  cur = seg->segment_list_entries;
1027  while (cur) {
1028  next = cur->next;
1029  av_freep(&cur->filename);
1030  av_free(cur);
1031  cur = next;
1032  }
1033 
1035  seg->avf = NULL;
1036  return ret;
1037 }
1038 
1039 static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1040 {
1041  SegmentContext *seg = s->priv_data;
1042  AVFormatContext *oc = seg->avf;
1043  if (oc->oformat->check_bitstream) {
1044  int ret = oc->oformat->check_bitstream(oc, pkt);
1045  if (ret == 1) {
1046  AVStream *st = s->streams[pkt->stream_index];
1047  AVStream *ost = oc->streams[pkt->stream_index];
1048  st->internal->bsfcs = ost->internal->bsfcs;
1049  st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1050  ost->internal->bsfcs = NULL;
1051  ost->internal->nb_bsfcs = 0;
1052  }
1053  return ret;
1054  }
1055  return 1;
1056 }
1057 
1058 #define OFFSET(x) offsetof(SegmentContext, x)
1059 #define E AV_OPT_FLAG_ENCODING_PARAM
1060 static const AVOption options[] = {
1061  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
1062  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1063  { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1064  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1065  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1066 
1067  { "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, "list_flags"},
1068  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
1069  { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, "list_flags"},
1070 
1071  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1072 
1073  { "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, "list_type" },
1074  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
1075  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
1076  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
1077  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
1078  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1079  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1080 
1081  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1082  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
1083  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
1084  { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1085  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E },
1086  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1087  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1088  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1089  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1090  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1091  { "segment_wrap_number", "set the number of wrap before the first segment", OFFSET(segment_idx_wrap_nb), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1092  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1093  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1094  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1095 
1096  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1097  { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1098  { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1099  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1100  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1101  { NULL },
1102 };
1103 
1104 #if CONFIG_SEGMENT_MUXER
1105 static const AVClass seg_class = {
1106  .class_name = "segment muxer",
1107  .item_name = av_default_item_name,
1108  .option = options,
1109  .version = LIBAVUTIL_VERSION_INT,
1110 };
1111 
1113  .name = "segment",
1114  .long_name = NULL_IF_CONFIG_SMALL("segment"),
1115  .priv_data_size = sizeof(SegmentContext),
1117  .init = seg_init,
1121  .deinit = seg_free,
1122  .check_bitstream = seg_check_bitstream,
1123  .priv_class = &seg_class,
1124 };
1125 #endif
1126 
1127 #if CONFIG_STREAM_SEGMENT_MUXER
1128 static const AVClass sseg_class = {
1129  .class_name = "stream_segment muxer",
1130  .item_name = av_default_item_name,
1131  .option = options,
1132  .version = LIBAVUTIL_VERSION_INT,
1133 };
1134 
1136  .name = "stream_segment,ssegment",
1137  .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1138  .priv_data_size = sizeof(SegmentContext),
1139  .flags = AVFMT_NOFILE,
1140  .init = seg_init,
1144  .deinit = seg_free,
1145  .check_bitstream = seg_check_bitstream,
1146  .priv_class = &sseg_class,
1147 };
1148 #endif
struct SegmentListEntry * next
Definition: segment.c:52
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1940
#define NULL
Definition: coverity.c:32
AVOutputFormat ff_segment_muxer
AVFormatContext * avf
Definition: segment.c:76
Bytestream IO Context.
Definition: avio.h:161
static const char * format[]
Definition: af_aiir.c:338
int size
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1636
char * header_filename
filename to write the output header to
Definition: segment.c:112
AVOption.
Definition: opt.h:246
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
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
char * entry_prefix
prefix to add to list entry filenames
Definition: segment.c:91
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:4886
int av_parse_time(int64_t *timeval, const char *timestr, int duration)
Parse timestr and return in *time a corresponding number of microseconds.
Definition: parseutils.c:587
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int av_escape(char **dst, const char *src, const char *special_chars, enum AVEscapeMode mode, int flags)
Escape string in src, and put the escaped string in an allocated string in *dst, which must be freed ...
Definition: avstring.c:327
AVDictionary * format_options
Definition: segment.c:79
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:240
int segment_idx_wrap
number after which the index wraps
Definition: segment.c:72
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:1318
#define FAIL(err)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int num
Numerator.
Definition: rational.h:59
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:35
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:655
#define tc
Definition: regdef.h:69
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
static AVPacket pkt
int segment_frame_count
number of reference frames in the segment
Definition: segment.c:107
char * filename
Definition: segment.c:51
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3949
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:525
static int seg_write_header(AVFormatContext *s)
Definition: segment.c:826
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:355
int list_flags
flags affecting list generation
Definition: segment.c:81
static int segment_mux_init(AVFormatContext *s)
Definition: segment.c:145
Format I/O context.
Definition: avformat.h:1358
int64_t last_duration
Definition: segment.c:53
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static void close_null_ctxp(AVIOContext **pb)
Definition: segment.c:598
int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
Parse timecode representation (hh:mm:ss[:;.
Definition: timecode.c:194
static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
Definition: segment.c:1039
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:258
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:524
uint8_t
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
char temp_list_filename[1024]
Definition: segment.c:122
AVOptions.
enum AVCodecID av_codec_get_id(const struct AVCodecTag *const *tags, unsigned int tag)
Get the AVCodecID for the given codec tag tag.
timestamp utils, mostly useful for debugging/logging purposes
#define f(width, name)
Definition: cbs_vp9.c:255
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5641
int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the stream st contained in s is matched by the stream specifier spec.
Definition: utils.c:5267
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:996
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4459
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
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:1489
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
#define ff_dlog(a,...)
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:38
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2521
char * format
format to use for output segment files
Definition: segment.c:77
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:604
#define av_log(a,...)
int break_non_keyframes
Definition: segment.c:118
int64_t time_delta
Definition: segment.c:109
int64_t initial_offset
initial timestamps offset, expressed in microseconds
Definition: segment.c:115
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
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 ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:549
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:131
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2021
#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:1598
int individual_header_trailer
Set by a private option.
Definition: segment.c:110
#define AVERROR(e)
Definition: error.h:43
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:350
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:76
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
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:639
char * url
input or output URL.
Definition: avformat.h:1454
#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
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
simple assert() macros that are a bit more flexible than ISO C assert().
int use_rename
Definition: segment.c:121
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 avformat_alloc_output_context2(AVFormatContext **ctx, ff_const59 AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
int64_t * times
list of segment interval specification
Definition: segment.c:100
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:954
char * reference_stream_specifier
reference stream specifier
Definition: segment.c:116
#define FFMAX(a, b)
Definition: common.h:94
static int set_segment_filename(AVFormatContext *s)
Definition: segment.c:196
int64_t offset_pts
Definition: segment.c:50
#define fail()
Definition: checkasm.h:120
int reference_stream_index
Definition: segment.c:117
static int seg_init(AVFormatContext *s)
Definition: segment.c:669
int nb_times
number of elments in the times array
Definition: segment.c:101
#define OFFSET(x)
Definition: segment.c:1058
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:285
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
int64_t last_val
remember last time for wrap around detection
Definition: segment.c:87
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:3975
void * opaque
User data.
Definition: avformat.h:1864
Use auto-selected escaping mode.
Definition: avstring.h:314
AVIOContext * list_pb
list file put-byte context
Definition: segment.c:93
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:161
static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
Definition: segment.c:129
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3288
int cut_pending
Definition: segment.c:88
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:508
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:466
int use_strftime
flag to expand filename with strftime
Definition: segment.c:96
const char * name
Definition: avformat.h:505
ff_const59 AVOutputFormat * oformat
Definition: segment.c:75
AVFormatContext * ctx
Definition: movenc.c:48
int reset_timestamps
reset timestamps at the beginning of each segment
Definition: segment.c:114
int use_clocktime
flag to cut segments at regular clock time
Definition: segment.c:84
ListType
Definition: segment.c:56
#define s(width, name)
Definition: cbs_vp9.c:257
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1689
int increment_tc
flag to increment timecode if found
Definition: segment.c:97
void ff_format_set_url(AVFormatContext *s, char *url)
Set AVFormatContext url field to the provided pointer.
Definition: utils.c:5801
AVDictionary * metadata
Definition: avformat.h:945
Opaque data information usually sparse.
Definition: avutil.h:205
int frames
Definition: movenc.c:65
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:533
av_warn_unused_result 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
if(ret< 0)
Definition: vf_mcdeint.c:279
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:849
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:4727
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1377
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:871
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:881
char * list
filename for the segment list file
Definition: segment.c:80
int av_dict_parse_string(AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags)
Parse the key/value pairs list and add the parsed entries to a dictionary.
Definition: dict.c:180
char * frames_str
segment frame numbers specification string
Definition: segment.c:103
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1199
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
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:1238
static void seg_free(AVFormatContext *s)
Definition: segment.c:661
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int header_written
whether we&#39;ve already called avformat_write_header
Definition: segment.c:89
Timecode helpers header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:530
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
int64_t time
segment duration
Definition: segment.c:95
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1946
void * buf
Definition: avisynth_c.h:766
int list_type
set the list type
Definition: segment.c:92
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:591
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
int segment_idx
index of the segment file to write, starting from 0
Definition: segment.c:71
Describe the class of an AVClass context structure.
Definition: log.h:67
int * frames
list of frame number specification
Definition: segment.c:104
int64_t start_pts
Definition: segment.c:49
ff_const59 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
Rational number (pair of numerator and denominator).
Definition: rational.h:58
char * time_str
segment duration specification string
Definition: segment.c:94
cl_device_type type
AVMediaType
Definition: avutil.h:199
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4393
misc parsing utilities
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
SegmentListEntry * segment_list_entries
Definition: segment.c:125
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:76
#define flags(name, subs,...)
Definition: cbs_av1.c:561
int nb_frames
number of elments in the frames array
Definition: segment.c:105
char * av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum)
Load timecode string in buf.
Definition: timecode.c:84
int write_header_trailer
Set by a private option.
Definition: segment.c:111
char * format_options_str
format options to use for output segment files
Definition: segment.c:78
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
static void segment_list_print_entry(AVIOContext *list_ioctx, ListType list_type, const SegmentListEntry *list_entry, void *log_ctx)
Definition: segment.c:320
double end_time
Definition: segment.c:48
static AVStream * ost
Main libavformat public API header.
int
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1558
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
int write_empty
Definition: segment.c:119
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:463
int64_t clocktime_wrap_duration
Definition: segment.c:86
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:148
#define SEGMENT_LIST_FLAG_CACHE
Definition: segment.c:66
#define E
Definition: segment.c:1059
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1073
#define localtime_r
Definition: time_internal.h:46
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:467
int den
Denominator.
Definition: rational.h:60
double start_time
Definition: segment.c:48
#define av_free(p)
int segment_idx_wrap_nb
number of time the index has wraped
Definition: segment.c:73
char * value
Definition: dict.h:87
#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
int64_t clocktime_offset
Definition: segment.c:85
void * priv_data
Format private data.
Definition: avformat.h:1386
static const AVOption options[]
Definition: segment.c:1060
#define AV_ESCAPE_FLAG_WHITESPACE
Consider spaces special and escape them even in the middle of the string.
Definition: avstring.h:327
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1254
static int open_null_ctx(AVIOContext **ctx)
Definition: segment.c:584
#define av_freep(p)
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
int segment_count
number of segment files already written
Definition: segment.c:74
AVOutputFormat ff_stream_segment_muxer
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
char * times_str
segment times specification string
Definition: segment.c:99
#define av_malloc_array(a, b)
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3961
int stream_index
Definition: avcodec.h:1479
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
SegmentListEntry cur_entry
Definition: segment.c:124
#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.
int list_size
number of entries for the segment list file
Definition: segment.c:82
deprecated
Definition: segment.c:61
This structure stores compressed data.
Definition: avcodec.h:1454
int frame_count
total number of reference frames
Definition: segment.c:106
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:449
#define SEGMENT_LIST_FLAG_LIVE
Definition: segment.c:67
SegmentListEntry * segment_list_entries_end
Definition: segment.c:126
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33