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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;
183  av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
184  }
185 
186  return 0;
187 }
188 
190 {
191  SegmentContext *seg = s->priv_data;
192  AVFormatContext *oc = seg->avf;
193  size_t size;
194  int ret;
195 
196  if (seg->segment_idx_wrap)
197  seg->segment_idx %= seg->segment_idx_wrap;
198  if (seg->use_strftime) {
199  time_t now0;
200  struct tm *tm, tmpbuf;
201  time(&now0);
202  tm = localtime_r(&now0, &tmpbuf);
203  if (!strftime(oc->filename, sizeof(oc->filename), s->filename, tm)) {
204  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
205  return AVERROR(EINVAL);
206  }
207  } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
208  s->filename, seg->segment_idx) < 0) {
209  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
210  return AVERROR(EINVAL);
211  }
212 
213  /* copy modified name in list entry */
214  size = strlen(av_basename(oc->filename)) + 1;
215  if (seg->entry_prefix)
216  size += strlen(seg->entry_prefix);
217 
218  if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
219  return ret;
220  snprintf(seg->cur_entry.filename, size, "%s%s",
221  seg->entry_prefix ? seg->entry_prefix : "",
222  av_basename(oc->filename));
223 
224  return 0;
225 }
226 
228 {
229  SegmentContext *seg = s->priv_data;
230  AVFormatContext *oc = seg->avf;
231  int err = 0;
232 
233  if (write_header) {
235  seg->avf = NULL;
236  if ((err = segment_mux_init(s)) < 0)
237  return err;
238  oc = seg->avf;
239  }
240 
241  seg->segment_idx++;
242  if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
243  seg->segment_idx_wrap_nb++;
244 
245  if ((err = set_segment_filename(s)) < 0)
246  return err;
247 
248  if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0) {
249  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
250  return err;
251  }
252  if (!seg->individual_header_trailer)
253  oc->pb->seekable = 0;
254 
255  if (oc->oformat->priv_class && oc->priv_data)
256  av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
257 
258  if (write_header) {
260  av_dict_copy(&options, seg->format_options, 0);
261  av_dict_set(&options, "fflags", "-autobsf", 0);
262  err = avformat_write_header(oc, &options);
263  av_dict_free(&options);
264  if (err < 0)
265  return err;
266  }
267 
268  seg->segment_frame_count = 0;
269  return 0;
270 }
271 
273 {
274  SegmentContext *seg = s->priv_data;
275  int ret;
276 
277  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
278  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
279  if (ret < 0) {
280  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
281  return ret;
282  }
283 
284  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
285  SegmentListEntry *entry;
286  double max_duration = 0;
287 
288  avio_printf(seg->list_pb, "#EXTM3U\n");
289  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
290  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
291  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
292  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
293 
294  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
296 
297  for (entry = seg->segment_list_entries; entry; entry = entry->next)
298  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
299  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
300  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
301  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
302  }
303 
304  return ret;
305 }
306 
307 static void segment_list_print_entry(AVIOContext *list_ioctx,
308  ListType list_type,
309  const SegmentListEntry *list_entry,
310  void *log_ctx)
311 {
312  switch (list_type) {
313  case LIST_TYPE_FLAT:
314  avio_printf(list_ioctx, "%s\n", list_entry->filename);
315  break;
316  case LIST_TYPE_CSV:
317  case LIST_TYPE_EXT:
318  print_csv_escaped_str(list_ioctx, list_entry->filename);
319  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
320  break;
321  case LIST_TYPE_M3U8:
322  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
323  list_entry->end_time - list_entry->start_time, list_entry->filename);
324  break;
325  case LIST_TYPE_FFCONCAT:
326  {
327  char *buf;
328  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
329  av_log(log_ctx, AV_LOG_WARNING,
330  "Error writing list entry '%s' in list file\n", list_entry->filename);
331  return;
332  }
333  avio_printf(list_ioctx, "file %s\n", buf);
334  av_free(buf);
335  break;
336  }
337  default:
338  av_assert0(!"Invalid list type");
339  }
340 }
341 
342 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
343 {
344  SegmentContext *seg = s->priv_data;
345  AVFormatContext *oc = seg->avf;
346  int ret = 0;
347  AVTimecode tc;
348  AVRational rate;
349  AVDictionaryEntry *tcr;
351  int i;
352  int err;
353 
354  if (!oc || !oc->pb)
355  return AVERROR(EINVAL);
356 
357  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
358  if (write_trailer)
359  ret = av_write_trailer(oc);
360 
361  if (ret < 0)
362  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
363  oc->filename);
364 
365  if (seg->list) {
366  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
367  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
368  if (!entry) {
369  ret = AVERROR(ENOMEM);
370  goto end;
371  }
372 
373  /* append new element */
374  memcpy(entry, &seg->cur_entry, sizeof(*entry));
375  entry->filename = av_strdup(entry->filename);
376  if (!seg->segment_list_entries)
378  else
379  seg->segment_list_entries_end->next = entry;
380  seg->segment_list_entries_end = entry;
381 
382  /* drop first item */
383  if (seg->list_size && seg->segment_count >= seg->list_size) {
384  entry = seg->segment_list_entries;
386  av_freep(&entry->filename);
387  av_freep(&entry);
388  }
389 
390  if ((ret = segment_list_open(s)) < 0)
391  goto end;
392  for (entry = seg->segment_list_entries; entry; entry = entry->next)
393  segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
394  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
395  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
396  ff_format_io_close(s, &seg->list_pb);
397  if (seg->use_rename)
398  ff_rename(seg->temp_list_filename, seg->list, s);
399  } else {
400  segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
401  avio_flush(seg->list_pb);
402  }
403  }
404 
405  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
406  seg->avf->filename, seg->segment_count);
407  seg->segment_count++;
408 
409  if (seg->increment_tc) {
410  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
411  if (tcr) {
412  /* search the first video stream */
413  for (i = 0; i < s->nb_streams; i++) {
415  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
416  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
417  if (err < 0) {
418  av_log(s, AV_LOG_WARNING, "Could not increment timecode, error occurred during timecode creation.");
419  break;
420  }
421  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
422  av_dict_set(&s->metadata, "timecode",
423  av_timecode_make_string(&tc, buf, 0), 0);
424  break;
425  }
426  }
427  } else {
428  av_log(s, AV_LOG_WARNING, "Could not increment timecode, no timecode metadata found");
429  }
430  }
431 
432 end:
433  ff_format_io_close(oc, &oc->pb);
434 
435  return ret;
436 }
437 
438 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
439  const char *times_str)
440 {
441  char *p;
442  int i, ret = 0;
443  char *times_str1 = av_strdup(times_str);
444  char *saveptr = NULL;
445 
446  if (!times_str1)
447  return AVERROR(ENOMEM);
448 
449 #define FAIL(err) ret = err; goto end
450 
451  *nb_times = 1;
452  for (p = times_str1; *p; p++)
453  if (*p == ',')
454  (*nb_times)++;
455 
456  *times = av_malloc_array(*nb_times, sizeof(**times));
457  if (!*times) {
458  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
459  FAIL(AVERROR(ENOMEM));
460  }
461 
462  p = times_str1;
463  for (i = 0; i < *nb_times; i++) {
464  int64_t t;
465  char *tstr = av_strtok(p, ",", &saveptr);
466  p = NULL;
467 
468  if (!tstr || !tstr[0]) {
469  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
470  times_str);
471  FAIL(AVERROR(EINVAL));
472  }
473 
474  ret = av_parse_time(&t, tstr, 1);
475  if (ret < 0) {
476  av_log(log_ctx, AV_LOG_ERROR,
477  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
478  FAIL(AVERROR(EINVAL));
479  }
480  (*times)[i] = t;
481 
482  /* check on monotonicity */
483  if (i && (*times)[i-1] > (*times)[i]) {
484  av_log(log_ctx, AV_LOG_ERROR,
485  "Specified time %f is greater than the following time %f\n",
486  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
487  FAIL(AVERROR(EINVAL));
488  }
489  }
490 
491 end:
492  av_free(times_str1);
493  return ret;
494 }
495 
496 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
497  const char *frames_str)
498 {
499  char *p;
500  int i, ret = 0;
501  char *frames_str1 = av_strdup(frames_str);
502  char *saveptr = NULL;
503 
504  if (!frames_str1)
505  return AVERROR(ENOMEM);
506 
507 #define FAIL(err) ret = err; goto end
508 
509  *nb_frames = 1;
510  for (p = frames_str1; *p; p++)
511  if (*p == ',')
512  (*nb_frames)++;
513 
514  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
515  if (!*frames) {
516  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
517  FAIL(AVERROR(ENOMEM));
518  }
519 
520  p = frames_str1;
521  for (i = 0; i < *nb_frames; i++) {
522  long int f;
523  char *tailptr;
524  char *fstr = av_strtok(p, ",", &saveptr);
525 
526  p = NULL;
527  if (!fstr) {
528  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
529  frames_str);
530  FAIL(AVERROR(EINVAL));
531  }
532  f = strtol(fstr, &tailptr, 10);
533  if (*tailptr || f <= 0 || f >= INT_MAX) {
534  av_log(log_ctx, AV_LOG_ERROR,
535  "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
536  fstr);
537  FAIL(AVERROR(EINVAL));
538  }
539  (*frames)[i] = f;
540 
541  /* check on monotonicity */
542  if (i && (*frames)[i-1] > (*frames)[i]) {
543  av_log(log_ctx, AV_LOG_ERROR,
544  "Specified frame %d is greater than the following frame %d\n",
545  (*frames)[i], (*frames)[i-1]);
546  FAIL(AVERROR(EINVAL));
547  }
548  }
549 
550 end:
551  av_free(frames_str1);
552  return ret;
553 }
554 
556 {
557  int buf_size = 32768;
558  uint8_t *buf = av_malloc(buf_size);
559  if (!buf)
560  return AVERROR(ENOMEM);
561  *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
562  if (!*ctx) {
563  av_free(buf);
564  return AVERROR(ENOMEM);
565  }
566  return 0;
567 }
568 
569 static void close_null_ctxp(AVIOContext **pb)
570 {
571  av_freep(&(*pb)->buffer);
572  avio_context_free(pb);
573 }
574 
576 {
577  SegmentContext *seg = s->priv_data;
578  int ret, i;
579 
580  seg->reference_stream_index = -1;
581  if (!strcmp(seg->reference_stream_specifier, "auto")) {
582  /* select first index of type with highest priority */
583  int type_index_map[AVMEDIA_TYPE_NB];
584  static const enum AVMediaType type_priority_list[] = {
590  };
591  enum AVMediaType type;
592 
593  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
594  type_index_map[i] = -1;
595 
596  /* select first index for each type */
597  for (i = 0; i < s->nb_streams; i++) {
598  type = s->streams[i]->codecpar->codec_type;
599  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
600  /* ignore attached pictures/cover art streams */
602  type_index_map[type] = i;
603  }
604 
605  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
606  type = type_priority_list[i];
607  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
608  break;
609  }
610  } else {
611  for (i = 0; i < s->nb_streams; i++) {
614  if (ret < 0)
615  return ret;
616  if (ret > 0) {
617  seg->reference_stream_index = i;
618  break;
619  }
620  }
621  }
622 
623  if (seg->reference_stream_index < 0) {
624  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
626  return AVERROR(EINVAL);
627  }
628 
629  return 0;
630 }
631 
633 {
634  SegmentContext *seg = s->priv_data;
635  ff_format_io_close(seg->avf, &seg->list_pb);
637  seg->avf = NULL;
638 }
639 
641 {
642  SegmentContext *seg = s->priv_data;
643  AVFormatContext *oc = seg->avf;
645  int ret;
646  int i;
647 
648  seg->segment_count = 0;
649  if (!seg->write_header_trailer)
650  seg->individual_header_trailer = 0;
651 
652  if (seg->header_filename) {
653  seg->write_header_trailer = 1;
654  seg->individual_header_trailer = 0;
655  }
656 
657  if (seg->initial_offset > 0) {
658  av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
659  "you can use output_ts_offset instead of it\n");
660  }
661 
662  if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
663  av_log(s, AV_LOG_ERROR,
664  "segment_time, segment_times, and segment_frames options "
665  "are mutually exclusive, select just one of them\n");
666  return AVERROR(EINVAL);
667  }
668 
669  if (seg->times_str) {
670  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
671  return ret;
672  } else if (seg->frames_str) {
673  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
674  return ret;
675  } else {
676  /* set default value if not specified */
677  if (!seg->time_str)
678  seg->time_str = av_strdup("2");
679  if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
680  av_log(s, AV_LOG_ERROR,
681  "Invalid time duration specification '%s' for segment_time option\n",
682  seg->time_str);
683  return ret;
684  }
685  if (seg->use_clocktime) {
686  if (seg->time <= 0) {
687  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
688  return AVERROR(EINVAL);
689  }
690  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
691  }
692  }
693 
694  if (seg->format_options_str) {
695  ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
696  if (ret < 0) {
697  av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
698  seg->format_options_str);
699  return ret;
700  }
701  }
702 
703  if (seg->list) {
704  if (seg->list_type == LIST_TYPE_UNDEFINED) {
705  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
706  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
707  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
708  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
709  else seg->list_type = LIST_TYPE_FLAT;
710  }
711  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
712  if ((ret = segment_list_open(s)) < 0)
713  return ret;
714  } else {
715  const char *proto = avio_find_protocol_name(seg->list);
716  seg->use_rename = proto && !strcmp(proto, "file");
717  }
718  }
719 
720  if (seg->list_type == LIST_TYPE_EXT)
721  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
722 
723  if ((ret = select_reference_stream(s)) < 0)
724  return ret;
725  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
728 
729  seg->oformat = av_guess_format(seg->format, s->filename, NULL);
730 
731  if (!seg->oformat)
733  if (seg->oformat->flags & AVFMT_NOFILE) {
734  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
735  seg->oformat->name);
736  return AVERROR(EINVAL);
737  }
738 
739  if ((ret = segment_mux_init(s)) < 0)
740  return ret;
741 
742  if ((ret = set_segment_filename(s)) < 0)
743  return ret;
744  oc = seg->avf;
745 
746  if (seg->write_header_trailer) {
747  if ((ret = s->io_open(s, &oc->pb,
748  seg->header_filename ? seg->header_filename : oc->filename,
749  AVIO_FLAG_WRITE, NULL)) < 0) {
750  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
751  return ret;
752  }
753  if (!seg->individual_header_trailer)
754  oc->pb->seekable = 0;
755  } else {
756  if ((ret = open_null_ctx(&oc->pb)) < 0)
757  return ret;
758  }
759 
760  av_dict_copy(&options, seg->format_options, 0);
761  av_dict_set(&options, "fflags", "-autobsf", 0);
762  ret = avformat_init_output(oc, &options);
763  if (av_dict_count(options)) {
764  av_log(s, AV_LOG_ERROR,
765  "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
766  av_dict_free(&options);
767  return AVERROR(EINVAL);
768  }
769  av_dict_free(&options);
770 
771  if (ret < 0) {
772  ff_format_io_close(oc, &oc->pb);
773  return ret;
774  }
775  seg->segment_frame_count = 0;
776 
777  av_assert0(s->nb_streams == oc->nb_streams);
778  if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) {
779  ret = avformat_write_header(oc, NULL);
780  if (ret < 0)
781  return ret;
782  seg->header_written = 1;
783  }
784 
785  for (i = 0; i < s->nb_streams; i++) {
786  AVStream *inner_st = oc->streams[i];
787  AVStream *outer_st = s->streams[i];
788  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
789  }
790 
791  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
792  s->avoid_negative_ts = 1;
793 
794  return ret;
795 }
796 
798 {
799  SegmentContext *seg = s->priv_data;
800  AVFormatContext *oc = seg->avf;
801  int ret, i;
802 
803  if (!seg->header_written) {
804  for (i = 0; i < s->nb_streams; i++) {
805  AVStream *st = oc->streams[i];
806  AVCodecParameters *ipar, *opar;
807 
808  ipar = s->streams[i]->codecpar;
809  opar = oc->streams[i]->codecpar;
810  avcodec_parameters_copy(opar, ipar);
811  if (!oc->oformat->codec_tag ||
812  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
813  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
814  opar->codec_tag = ipar->codec_tag;
815  } else {
816  opar->codec_tag = 0;
817  }
819  st->time_base = s->streams[i]->time_base;
820  }
821  ret = avformat_write_header(oc, NULL);
822  if (ret < 0)
823  return ret;
824  }
825 
826  if (!seg->write_header_trailer || seg->header_filename) {
827  if (seg->header_filename) {
828  av_write_frame(oc, NULL);
829  ff_format_io_close(oc, &oc->pb);
830  } else {
831  close_null_ctxp(&oc->pb);
832  }
833  if ((ret = oc->io_open(oc, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0)
834  return ret;
835  if (!seg->individual_header_trailer)
836  oc->pb->seekable = 0;
837  }
838 
839  return 0;
840 }
841 
843 {
844  SegmentContext *seg = s->priv_data;
845  AVStream *st = s->streams[pkt->stream_index];
846  int64_t end_pts = INT64_MAX, offset;
847  int start_frame = INT_MAX;
848  int ret;
849  struct tm ti;
850  int64_t usecs;
851  int64_t wrapped_val;
852 
853  if (!seg->avf || !seg->avf->pb)
854  return AVERROR(EINVAL);
855 
856 calc_times:
857  if (seg->times) {
858  end_pts = seg->segment_count < seg->nb_times ?
859  seg->times[seg->segment_count] : INT64_MAX;
860  } else if (seg->frames) {
861  start_frame = seg->segment_count < seg->nb_frames ?
862  seg->frames[seg->segment_count] : INT_MAX;
863  } else {
864  if (seg->use_clocktime) {
865  int64_t avgt = av_gettime();
866  time_t sec = avgt / 1000000;
867  localtime_r(&sec, &ti);
868  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
869  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
870  if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
871  seg->cut_pending = 1;
872  seg->last_val = wrapped_val;
873  } else {
874  end_pts = seg->time * (seg->segment_count + 1);
875  }
876  }
877 
878  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
879  pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
880  av_ts2timestr(pkt->duration, &st->time_base),
881  pkt->flags & AV_PKT_FLAG_KEY,
882  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
883 
884  if (pkt->stream_index == seg->reference_stream_index &&
885  (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
886  (seg->segment_frame_count > 0 || seg->write_empty) &&
887  (seg->cut_pending || seg->frame_count >= start_frame ||
888  (pkt->pts != AV_NOPTS_VALUE &&
889  av_compare_ts(pkt->pts, st->time_base,
890  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
891  /* sanitize end time in case last packet didn't have a defined duration */
892  if (seg->cur_entry.last_duration == 0)
893  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
894 
895  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
896  goto fail;
897 
898  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
899  goto fail;
900 
901  seg->cut_pending = 0;
903  seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
906 
907  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
908  goto calc_times;
909  }
910 
911  if (pkt->stream_index == seg->reference_stream_index) {
912  if (pkt->pts != AV_NOPTS_VALUE)
913  seg->cur_entry.end_time =
914  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
915  seg->cur_entry.last_duration = pkt->duration;
916  }
917 
918  if (seg->segment_frame_count == 0) {
919  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
920  seg->avf->filename, pkt->stream_index,
921  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
922  }
923 
924  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
925  pkt->stream_index,
927  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
928  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
929 
930  /* compute new timestamps */
931  offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
933  if (pkt->pts != AV_NOPTS_VALUE)
934  pkt->pts += offset;
935  if (pkt->dts != AV_NOPTS_VALUE)
936  pkt->dts += offset;
937 
938  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
939  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
940  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
941 
942  ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
943 
944 fail:
945  if (pkt->stream_index == seg->reference_stream_index) {
946  seg->frame_count++;
947  seg->segment_frame_count++;
948  }
949 
950  return ret;
951 }
952 
954 {
955  SegmentContext *seg = s->priv_data;
956  AVFormatContext *oc = seg->avf;
957  SegmentListEntry *cur, *next;
958  int ret = 0;
959 
960  if (!oc)
961  goto fail;
962 
963  if (!seg->write_header_trailer) {
964  if ((ret = segment_end(s, 0, 1)) < 0)
965  goto fail;
966  if ((ret = open_null_ctx(&oc->pb)) < 0)
967  goto fail;
968  ret = av_write_trailer(oc);
969  close_null_ctxp(&oc->pb);
970  } else {
971  ret = segment_end(s, 1, 1);
972  }
973 fail:
974  if (seg->list)
975  ff_format_io_close(s, &seg->list_pb);
976 
978  av_opt_free(seg);
979  av_freep(&seg->times);
980  av_freep(&seg->frames);
981  av_freep(&seg->cur_entry.filename);
982 
983  cur = seg->segment_list_entries;
984  while (cur) {
985  next = cur->next;
986  av_freep(&cur->filename);
987  av_free(cur);
988  cur = next;
989  }
990 
992  seg->avf = NULL;
993  return ret;
994 }
995 
996 static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
997 {
998  SegmentContext *seg = s->priv_data;
999  AVFormatContext *oc = seg->avf;
1000  if (oc->oformat->check_bitstream) {
1001  int ret = oc->oformat->check_bitstream(oc, pkt);
1002  if (ret == 1) {
1003  AVStream *st = s->streams[pkt->stream_index];
1004  AVStream *ost = oc->streams[pkt->stream_index];
1005  st->internal->bsfcs = ost->internal->bsfcs;
1006  st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1007  ost->internal->bsfcs = NULL;
1008  ost->internal->nb_bsfcs = 0;
1009  }
1010  return ret;
1011  }
1012  return 1;
1013 }
1014 
1015 #define OFFSET(x) offsetof(SegmentContext, x)
1016 #define E AV_OPT_FLAG_ENCODING_PARAM
1017 static const AVOption options[] = {
1018  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
1019  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1020  { "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 },
1021  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1022  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1023 
1024  { "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"},
1025  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
1026  { "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"},
1027 
1028  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1029 
1030  { "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" },
1031  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
1032  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
1033  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
1034  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
1035  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1036  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1037 
1038  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1039  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
1040  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
1041  { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1042  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
1043  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1044  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1045  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1046  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1047  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1048  { "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 },
1049  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1050  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1051  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1052 
1053  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1054  { "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 },
1055  { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1056  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1057  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1058  { NULL },
1059 };
1060 
1061 static const AVClass seg_class = {
1062  .class_name = "segment muxer",
1063  .item_name = av_default_item_name,
1064  .option = options,
1065  .version = LIBAVUTIL_VERSION_INT,
1066 };
1067 
1069  .name = "segment",
1070  .long_name = NULL_IF_CONFIG_SMALL("segment"),
1071  .priv_data_size = sizeof(SegmentContext),
1073  .init = seg_init,
1077  .deinit = seg_free,
1078  .check_bitstream = seg_check_bitstream,
1079  .priv_class = &seg_class,
1080 };
1081 
1082 static const AVClass sseg_class = {
1083  .class_name = "stream_segment muxer",
1084  .item_name = av_default_item_name,
1085  .option = options,
1086  .version = LIBAVUTIL_VERSION_INT,
1087 };
1088 
1090  .name = "stream_segment,ssegment",
1091  .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1092  .priv_data_size = sizeof(SegmentContext),
1093  .flags = AVFMT_NOFILE,
1094  .init = seg_init,
1098  .deinit = seg_free,
1099  .check_bitstream = seg_check_bitstream,
1100  .priv_class = &sseg_class,
1101 };
struct SegmentListEntry * next
Definition: segment.c:52
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:671
#define NULL
Definition: coverity.c:32
AVFormatContext * avf
Definition: segment.c:76
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:161
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1605
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:927
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
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:4739
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:326
AVDictionary * format_options
Definition: segment.c:79
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:227
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:1372
#define FAIL(err)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4143
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:959
int num
Numerator.
Definition: rational.h:59
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:35
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:649
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:661
#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
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 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:4135
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:496
static int seg_write_header(AVFormatContext *s)
Definition: segment.c:797
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:342
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:1349
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:569
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:996
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:257
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:543
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
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:1690
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5451
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:4959
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:953
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4369
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
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:1460
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
static int flags
Definition: log.c:57
#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:85
ptrdiff_t size
Definition: opengl_enc.c:101
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2433
char * format
format to use for output segment files
Definition: segment.c:77
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:575
#define av_log(a,...)
int break_non_keyframes
Definition: segment.c:118
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1368
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:1704
int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
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
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
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2279
#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:1567
int individual_header_trailer
Set by a private option.
Definition: segment.c:110
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#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:179
#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:4139
simple assert() macros that are a bit more flexible than ISO C assert().
int use_rename
Definition: segment.c:121
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:970
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:189
int64_t offset_pts
Definition: segment.c:50
#define fail()
Definition: checkasm.h:109
int reference_stream_index
Definition: segment.c:117
static int seg_init(AVFormatContext *s)
Definition: segment.c:640
int nb_times
number of elments in the times array
Definition: segment.c:101
#define OFFSET(x)
Definition: segment.c:1015
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:272
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1678
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
void * opaque
User data.
Definition: avformat.h:1833
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:1405
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:167
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:261
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:236
char filename[1024]
input or output filename
Definition: avformat.h:1425
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:528
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:485
static const AVClass sseg_class
Definition: segment.c:1082
int use_strftime
flag to expand filename with strftime
Definition: segment.c:96
const char * name
Definition: avformat.h:524
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
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1658
int increment_tc
flag to increment timecode if found
Definition: segment.c:97
AVDictionary * metadata
Definition: avformat.h:961
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
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:552
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:500
#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:859
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:4614
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:842
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:889
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
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:237
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1241
static void seg_free(AVFormatContext *s)
Definition: segment.c:632
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int header_written
whether we've already called avformat_write_header
Definition: segment.c:89
Timecode helpers header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:549
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:194
int64_t time
segment duration
Definition: segment.c:95
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
int list_type
set the list type
Definition: segment.c:92
AVOutputFormat ff_segment_muxer
Definition: segment.c:1068
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:543
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
static const char * format
Definition: movenc.c:47
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
Rational number (pair of numerator and denominator).
Definition: rational.h:58
char * time_str
segment duration specification string
Definition: segment.c:94
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:4304
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:471
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:79
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:307
double end_time
Definition: segment.c:48
static const AVClass seg_class
Definition: segment.c:1061
Main libavformat public API header.
int
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1544
int write_empty
Definition: segment.c:119
if(ret< 0)
Definition: vf_mcdeint.c:279
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:478
int64_t clocktime_wrap_duration
Definition: segment.c:86
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:950
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:146
#define SEGMENT_LIST_FLAG_CACHE
Definition: segment.c:66
#define E
Definition: segment.c:1016
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1055
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:438
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 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:1377
static const AVOption options[]
Definition: segment.c:1017
#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
AVOutputFormat ff_stream_segment_muxer
Definition: segment.c:1089
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1671
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 open_null_ctx(AVIOContext **ctx)
Definition: segment.c:555
#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
AVCodecParameters * codecpar
Definition: avformat.h:1252
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:4147
int stream_index
Definition: avcodec.h:1674
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
SegmentListEntry cur_entry
Definition: segment.c:124
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
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1909
deprecated
Definition: segment.c:61
This structure stores compressed data.
Definition: avcodec.h:1649
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
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1915
#define SEGMENT_LIST_FLAG_LIVE
Definition: segment.c:67
SegmentListEntry * segment_list_entries_end
Definition: segment.c:126
AVOutputFormat * oformat
Definition: segment.c:75
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1665
#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