FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
segment.c
Go to the documentation of this file.
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  char buf[1024];
196  char *new_name;
197 
198  if (seg->segment_idx_wrap)
199  seg->segment_idx %= seg->segment_idx_wrap;
200  if (seg->use_strftime) {
201  time_t now0;
202  struct tm *tm, tmpbuf;
203  time(&now0);
204  tm = localtime_r(&now0, &tmpbuf);
205  if (!strftime(buf, sizeof(buf), s->url, tm)) {
206  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
207  return AVERROR(EINVAL);
208  }
209  } else if (av_get_frame_filename(buf, sizeof(buf),
210  s->url, seg->segment_idx) < 0) {
211  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->url);
212  return AVERROR(EINVAL);
213  }
214  new_name = av_strdup(buf);
215  if (!new_name)
216  return AVERROR(ENOMEM);
217  ff_format_set_url(oc, new_name);
218 
219  /* copy modified name in list entry */
220  size = strlen(av_basename(oc->url)) + 1;
221  if (seg->entry_prefix)
222  size += strlen(seg->entry_prefix);
223 
224  if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
225  return ret;
226  snprintf(seg->cur_entry.filename, size, "%s%s",
227  seg->entry_prefix ? seg->entry_prefix : "",
228  av_basename(oc->url));
229 
230  return 0;
231 }
232 
234 {
235  SegmentContext *seg = s->priv_data;
236  AVFormatContext *oc = seg->avf;
237  int err = 0;
238 
239  if (write_header) {
241  seg->avf = NULL;
242  if ((err = segment_mux_init(s)) < 0)
243  return err;
244  oc = seg->avf;
245  }
246 
247  seg->segment_idx++;
248  if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
249  seg->segment_idx_wrap_nb++;
250 
251  if ((err = set_segment_filename(s)) < 0)
252  return err;
253 
254  if ((err = s->io_open(s, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) {
255  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
256  return err;
257  }
258  if (!seg->individual_header_trailer)
259  oc->pb->seekable = 0;
260 
261  if (oc->oformat->priv_class && oc->priv_data)
262  av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
263 
264  if (write_header) {
266  av_dict_copy(&options, seg->format_options, 0);
267  av_dict_set(&options, "fflags", "-autobsf", 0);
268  err = avformat_write_header(oc, &options);
269  av_dict_free(&options);
270  if (err < 0)
271  return err;
272  }
273 
274  seg->segment_frame_count = 0;
275  return 0;
276 }
277 
279 {
280  SegmentContext *seg = s->priv_data;
281  int ret;
282 
283  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
284  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
285  if (ret < 0) {
286  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
287  return ret;
288  }
289 
290  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
291  SegmentListEntry *entry;
292  double max_duration = 0;
293 
294  avio_printf(seg->list_pb, "#EXTM3U\n");
295  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
296  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
297  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
298  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
299 
300  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
302 
303  for (entry = seg->segment_list_entries; entry; entry = entry->next)
304  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
305  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
306  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
307  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
308  }
309 
310  return ret;
311 }
312 
313 static void segment_list_print_entry(AVIOContext *list_ioctx,
314  ListType list_type,
315  const SegmentListEntry *list_entry,
316  void *log_ctx)
317 {
318  switch (list_type) {
319  case LIST_TYPE_FLAT:
320  avio_printf(list_ioctx, "%s\n", list_entry->filename);
321  break;
322  case LIST_TYPE_CSV:
323  case LIST_TYPE_EXT:
324  print_csv_escaped_str(list_ioctx, list_entry->filename);
325  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
326  break;
327  case LIST_TYPE_M3U8:
328  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
329  list_entry->end_time - list_entry->start_time, list_entry->filename);
330  break;
331  case LIST_TYPE_FFCONCAT:
332  {
333  char *buf;
334  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
335  av_log(log_ctx, AV_LOG_WARNING,
336  "Error writing list entry '%s' in list file\n", list_entry->filename);
337  return;
338  }
339  avio_printf(list_ioctx, "file %s\n", buf);
340  av_free(buf);
341  break;
342  }
343  default:
344  av_assert0(!"Invalid list type");
345  }
346 }
347 
348 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
349 {
350  SegmentContext *seg = s->priv_data;
351  AVFormatContext *oc = seg->avf;
352  int ret = 0;
353  AVTimecode tc;
354  AVRational rate;
355  AVDictionaryEntry *tcr;
357  int i;
358  int err;
359 
360  if (!oc || !oc->pb)
361  return AVERROR(EINVAL);
362 
363  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
364  if (write_trailer)
365  ret = av_write_trailer(oc);
366 
367  if (ret < 0)
368  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
369  oc->url);
370 
371  if (seg->list) {
372  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
373  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
374  if (!entry) {
375  ret = AVERROR(ENOMEM);
376  goto end;
377  }
378 
379  /* append new element */
380  memcpy(entry, &seg->cur_entry, sizeof(*entry));
381  entry->filename = av_strdup(entry->filename);
382  if (!seg->segment_list_entries)
384  else
385  seg->segment_list_entries_end->next = entry;
386  seg->segment_list_entries_end = entry;
387 
388  /* drop first item */
389  if (seg->list_size && seg->segment_count >= seg->list_size) {
390  entry = seg->segment_list_entries;
392  av_freep(&entry->filename);
393  av_freep(&entry);
394  }
395 
396  if ((ret = segment_list_open(s)) < 0)
397  goto end;
398  for (entry = seg->segment_list_entries; entry; entry = entry->next)
399  segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
400  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
401  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
402  ff_format_io_close(s, &seg->list_pb);
403  if (seg->use_rename)
404  ff_rename(seg->temp_list_filename, seg->list, s);
405  } else {
406  segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
407  avio_flush(seg->list_pb);
408  }
409  }
410 
411  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
412  seg->avf->url, seg->segment_count);
413  seg->segment_count++;
414 
415  if (seg->increment_tc) {
416  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
417  if (tcr) {
418  /* search the first video stream */
419  for (i = 0; i < s->nb_streams; i++) {
421  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
422  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
423  if (err < 0) {
424  av_log(s, AV_LOG_WARNING, "Could not increment timecode, error occurred during timecode creation.");
425  break;
426  }
427  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
428  av_dict_set(&s->metadata, "timecode",
429  av_timecode_make_string(&tc, buf, 0), 0);
430  break;
431  }
432  }
433  } else {
434  av_log(s, AV_LOG_WARNING, "Could not increment timecode, no timecode metadata found");
435  }
436  }
437 
438 end:
439  ff_format_io_close(oc, &oc->pb);
440 
441  return ret;
442 }
443 
444 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
445  const char *times_str)
446 {
447  char *p;
448  int i, ret = 0;
449  char *times_str1 = av_strdup(times_str);
450  char *saveptr = NULL;
451 
452  if (!times_str1)
453  return AVERROR(ENOMEM);
454 
455 #define FAIL(err) ret = err; goto end
456 
457  *nb_times = 1;
458  for (p = times_str1; *p; p++)
459  if (*p == ',')
460  (*nb_times)++;
461 
462  *times = av_malloc_array(*nb_times, sizeof(**times));
463  if (!*times) {
464  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
465  FAIL(AVERROR(ENOMEM));
466  }
467 
468  p = times_str1;
469  for (i = 0; i < *nb_times; i++) {
470  int64_t t;
471  char *tstr = av_strtok(p, ",", &saveptr);
472  p = NULL;
473 
474  if (!tstr || !tstr[0]) {
475  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
476  times_str);
477  FAIL(AVERROR(EINVAL));
478  }
479 
480  ret = av_parse_time(&t, tstr, 1);
481  if (ret < 0) {
482  av_log(log_ctx, AV_LOG_ERROR,
483  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
484  FAIL(AVERROR(EINVAL));
485  }
486  (*times)[i] = t;
487 
488  /* check on monotonicity */
489  if (i && (*times)[i-1] > (*times)[i]) {
490  av_log(log_ctx, AV_LOG_ERROR,
491  "Specified time %f is greater than the following time %f\n",
492  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
493  FAIL(AVERROR(EINVAL));
494  }
495  }
496 
497 end:
498  av_free(times_str1);
499  return ret;
500 }
501 
502 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
503  const char *frames_str)
504 {
505  char *p;
506  int i, ret = 0;
507  char *frames_str1 = av_strdup(frames_str);
508  char *saveptr = NULL;
509 
510  if (!frames_str1)
511  return AVERROR(ENOMEM);
512 
513 #define FAIL(err) ret = err; goto end
514 
515  *nb_frames = 1;
516  for (p = frames_str1; *p; p++)
517  if (*p == ',')
518  (*nb_frames)++;
519 
520  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
521  if (!*frames) {
522  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
523  FAIL(AVERROR(ENOMEM));
524  }
525 
526  p = frames_str1;
527  for (i = 0; i < *nb_frames; i++) {
528  long int f;
529  char *tailptr;
530  char *fstr = av_strtok(p, ",", &saveptr);
531 
532  p = NULL;
533  if (!fstr) {
534  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
535  frames_str);
536  FAIL(AVERROR(EINVAL));
537  }
538  f = strtol(fstr, &tailptr, 10);
539  if (*tailptr || f <= 0 || f >= INT_MAX) {
540  av_log(log_ctx, AV_LOG_ERROR,
541  "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
542  fstr);
543  FAIL(AVERROR(EINVAL));
544  }
545  (*frames)[i] = f;
546 
547  /* check on monotonicity */
548  if (i && (*frames)[i-1] > (*frames)[i]) {
549  av_log(log_ctx, AV_LOG_ERROR,
550  "Specified frame %d is greater than the following frame %d\n",
551  (*frames)[i], (*frames)[i-1]);
552  FAIL(AVERROR(EINVAL));
553  }
554  }
555 
556 end:
557  av_free(frames_str1);
558  return ret;
559 }
560 
562 {
563  int buf_size = 32768;
564  uint8_t *buf = av_malloc(buf_size);
565  if (!buf)
566  return AVERROR(ENOMEM);
567  *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
568  if (!*ctx) {
569  av_free(buf);
570  return AVERROR(ENOMEM);
571  }
572  return 0;
573 }
574 
575 static void close_null_ctxp(AVIOContext **pb)
576 {
577  av_freep(&(*pb)->buffer);
578  avio_context_free(pb);
579 }
580 
582 {
583  SegmentContext *seg = s->priv_data;
584  int ret, i;
585 
586  seg->reference_stream_index = -1;
587  if (!strcmp(seg->reference_stream_specifier, "auto")) {
588  /* select first index of type with highest priority */
589  int type_index_map[AVMEDIA_TYPE_NB];
590  static const enum AVMediaType type_priority_list[] = {
596  };
597  enum AVMediaType type;
598 
599  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
600  type_index_map[i] = -1;
601 
602  /* select first index for each type */
603  for (i = 0; i < s->nb_streams; i++) {
604  type = s->streams[i]->codecpar->codec_type;
605  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
606  /* ignore attached pictures/cover art streams */
608  type_index_map[type] = i;
609  }
610 
611  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
612  type = type_priority_list[i];
613  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
614  break;
615  }
616  } else {
617  for (i = 0; i < s->nb_streams; i++) {
620  if (ret < 0)
621  return ret;
622  if (ret > 0) {
623  seg->reference_stream_index = i;
624  break;
625  }
626  }
627  }
628 
629  if (seg->reference_stream_index < 0) {
630  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
632  return AVERROR(EINVAL);
633  }
634 
635  return 0;
636 }
637 
639 {
640  SegmentContext *seg = s->priv_data;
641  ff_format_io_close(seg->avf, &seg->list_pb);
643  seg->avf = NULL;
644 }
645 
647 {
648  SegmentContext *seg = s->priv_data;
649  AVFormatContext *oc = seg->avf;
651  int ret;
652  int i;
653 
654  seg->segment_count = 0;
655  if (!seg->write_header_trailer)
656  seg->individual_header_trailer = 0;
657 
658  if (seg->header_filename) {
659  seg->write_header_trailer = 1;
660  seg->individual_header_trailer = 0;
661  }
662 
663  if (seg->initial_offset > 0) {
664  av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
665  "you can use output_ts_offset instead of it\n");
666  }
667 
668  if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
669  av_log(s, AV_LOG_ERROR,
670  "segment_time, segment_times, and segment_frames options "
671  "are mutually exclusive, select just one of them\n");
672  return AVERROR(EINVAL);
673  }
674 
675  if (seg->times_str) {
676  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
677  return ret;
678  } else if (seg->frames_str) {
679  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
680  return ret;
681  } else {
682  /* set default value if not specified */
683  if (!seg->time_str)
684  seg->time_str = av_strdup("2");
685  if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
686  av_log(s, AV_LOG_ERROR,
687  "Invalid time duration specification '%s' for segment_time option\n",
688  seg->time_str);
689  return ret;
690  }
691  if (seg->use_clocktime) {
692  if (seg->time <= 0) {
693  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
694  return AVERROR(EINVAL);
695  }
696  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
697  }
698  }
699 
700  if (seg->format_options_str) {
701  ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
702  if (ret < 0) {
703  av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
704  seg->format_options_str);
705  return ret;
706  }
707  }
708 
709  if (seg->list) {
710  if (seg->list_type == LIST_TYPE_UNDEFINED) {
711  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
712  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
713  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
714  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
715  else seg->list_type = LIST_TYPE_FLAT;
716  }
717  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
718  if ((ret = segment_list_open(s)) < 0)
719  return ret;
720  } else {
721  const char *proto = avio_find_protocol_name(seg->list);
722  seg->use_rename = proto && !strcmp(proto, "file");
723  }
724  }
725 
726  if (seg->list_type == LIST_TYPE_EXT)
727  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
728 
729  if ((ret = select_reference_stream(s)) < 0)
730  return ret;
731  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
734 
735  seg->oformat = av_guess_format(seg->format, s->url, NULL);
736 
737  if (!seg->oformat)
739  if (seg->oformat->flags & AVFMT_NOFILE) {
740  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
741  seg->oformat->name);
742  return AVERROR(EINVAL);
743  }
744 
745  if ((ret = segment_mux_init(s)) < 0)
746  return ret;
747 
748  if ((ret = set_segment_filename(s)) < 0)
749  return ret;
750  oc = seg->avf;
751 
752  if (seg->write_header_trailer) {
753  if ((ret = s->io_open(s, &oc->pb,
754  seg->header_filename ? seg->header_filename : oc->url,
755  AVIO_FLAG_WRITE, NULL)) < 0) {
756  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
757  return ret;
758  }
759  if (!seg->individual_header_trailer)
760  oc->pb->seekable = 0;
761  } else {
762  if ((ret = open_null_ctx(&oc->pb)) < 0)
763  return ret;
764  }
765 
766  av_dict_copy(&options, seg->format_options, 0);
767  av_dict_set(&options, "fflags", "-autobsf", 0);
768  ret = avformat_init_output(oc, &options);
769  if (av_dict_count(options)) {
770  av_log(s, AV_LOG_ERROR,
771  "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
772  av_dict_free(&options);
773  return AVERROR(EINVAL);
774  }
775  av_dict_free(&options);
776 
777  if (ret < 0) {
778  ff_format_io_close(oc, &oc->pb);
779  return ret;
780  }
781  seg->segment_frame_count = 0;
782 
783  av_assert0(s->nb_streams == oc->nb_streams);
784  if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) {
785  ret = avformat_write_header(oc, NULL);
786  if (ret < 0)
787  return ret;
788  seg->header_written = 1;
789  }
790 
791  for (i = 0; i < s->nb_streams; i++) {
792  AVStream *inner_st = oc->streams[i];
793  AVStream *outer_st = s->streams[i];
794  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
795  }
796 
797  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
798  s->avoid_negative_ts = 1;
799 
800  return ret;
801 }
802 
804 {
805  SegmentContext *seg = s->priv_data;
806  AVFormatContext *oc = seg->avf;
807  int ret, i;
808 
809  if (!seg->header_written) {
810  for (i = 0; i < s->nb_streams; i++) {
811  AVStream *st = oc->streams[i];
812  AVCodecParameters *ipar, *opar;
813 
814  ipar = s->streams[i]->codecpar;
815  opar = oc->streams[i]->codecpar;
816  avcodec_parameters_copy(opar, ipar);
817  if (!oc->oformat->codec_tag ||
818  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
819  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
820  opar->codec_tag = ipar->codec_tag;
821  } else {
822  opar->codec_tag = 0;
823  }
825  st->time_base = s->streams[i]->time_base;
826  }
827  ret = avformat_write_header(oc, NULL);
828  if (ret < 0)
829  return ret;
830  }
831 
832  if (!seg->write_header_trailer || seg->header_filename) {
833  if (seg->header_filename) {
834  av_write_frame(oc, NULL);
835  ff_format_io_close(oc, &oc->pb);
836  } else {
837  close_null_ctxp(&oc->pb);
838  }
839  if ((ret = oc->io_open(oc, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0)
840  return ret;
841  if (!seg->individual_header_trailer)
842  oc->pb->seekable = 0;
843  }
844 
845  return 0;
846 }
847 
849 {
850  SegmentContext *seg = s->priv_data;
851  AVStream *st = s->streams[pkt->stream_index];
852  int64_t end_pts = INT64_MAX, offset;
853  int start_frame = INT_MAX;
854  int ret;
855  struct tm ti;
856  int64_t usecs;
857  int64_t wrapped_val;
858 
859  if (!seg->avf || !seg->avf->pb)
860  return AVERROR(EINVAL);
861 
862 calc_times:
863  if (seg->times) {
864  end_pts = seg->segment_count < seg->nb_times ?
865  seg->times[seg->segment_count] : INT64_MAX;
866  } else if (seg->frames) {
867  start_frame = seg->segment_count < seg->nb_frames ?
868  seg->frames[seg->segment_count] : INT_MAX;
869  } else {
870  if (seg->use_clocktime) {
871  int64_t avgt = av_gettime();
872  time_t sec = avgt / 1000000;
873  localtime_r(&sec, &ti);
874  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
875  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
876  if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
877  seg->cut_pending = 1;
878  seg->last_val = wrapped_val;
879  } else {
880  end_pts = seg->time * (seg->segment_count + 1);
881  }
882  }
883 
884  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
885  pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
886  av_ts2timestr(pkt->duration, &st->time_base),
887  pkt->flags & AV_PKT_FLAG_KEY,
888  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
889 
890  if (pkt->stream_index == seg->reference_stream_index &&
891  (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
892  (seg->segment_frame_count > 0 || seg->write_empty) &&
893  (seg->cut_pending || seg->frame_count >= start_frame ||
894  (pkt->pts != AV_NOPTS_VALUE &&
895  av_compare_ts(pkt->pts, st->time_base,
896  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
897  /* sanitize end time in case last packet didn't have a defined duration */
898  if (seg->cur_entry.last_duration == 0)
899  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
900 
901  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
902  goto fail;
903 
904  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
905  goto fail;
906 
907  seg->cut_pending = 0;
909  seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
912 
913  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
914  goto calc_times;
915  }
916 
917  if (pkt->stream_index == seg->reference_stream_index) {
918  if (pkt->pts != AV_NOPTS_VALUE)
919  seg->cur_entry.end_time =
920  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
921  seg->cur_entry.last_duration = pkt->duration;
922  }
923 
924  if (seg->segment_frame_count == 0) {
925  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
926  seg->avf->url, pkt->stream_index,
927  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
928  }
929 
930  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
931  pkt->stream_index,
933  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
934  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
935 
936  /* compute new timestamps */
937  offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
939  if (pkt->pts != AV_NOPTS_VALUE)
940  pkt->pts += offset;
941  if (pkt->dts != AV_NOPTS_VALUE)
942  pkt->dts += offset;
943 
944  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
945  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
946  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
947 
948  ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
949 
950 fail:
951  if (pkt->stream_index == seg->reference_stream_index) {
952  seg->frame_count++;
953  seg->segment_frame_count++;
954  }
955 
956  return ret;
957 }
958 
960 {
961  SegmentContext *seg = s->priv_data;
962  AVFormatContext *oc = seg->avf;
963  SegmentListEntry *cur, *next;
964  int ret = 0;
965 
966  if (!oc)
967  goto fail;
968 
969  if (!seg->write_header_trailer) {
970  if ((ret = segment_end(s, 0, 1)) < 0)
971  goto fail;
972  if ((ret = open_null_ctx(&oc->pb)) < 0)
973  goto fail;
974  ret = av_write_trailer(oc);
975  close_null_ctxp(&oc->pb);
976  } else {
977  ret = segment_end(s, 1, 1);
978  }
979 fail:
980  if (seg->list)
981  ff_format_io_close(s, &seg->list_pb);
982 
984  av_opt_free(seg);
985  av_freep(&seg->times);
986  av_freep(&seg->frames);
987  av_freep(&seg->cur_entry.filename);
988 
989  cur = seg->segment_list_entries;
990  while (cur) {
991  next = cur->next;
992  av_freep(&cur->filename);
993  av_free(cur);
994  cur = next;
995  }
996 
998  seg->avf = NULL;
999  return ret;
1000 }
1001 
1002 static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1003 {
1004  SegmentContext *seg = s->priv_data;
1005  AVFormatContext *oc = seg->avf;
1006  if (oc->oformat->check_bitstream) {
1007  int ret = oc->oformat->check_bitstream(oc, pkt);
1008  if (ret == 1) {
1009  AVStream *st = s->streams[pkt->stream_index];
1010  AVStream *ost = oc->streams[pkt->stream_index];
1011  st->internal->bsfcs = ost->internal->bsfcs;
1012  st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1013  ost->internal->bsfcs = NULL;
1014  ost->internal->nb_bsfcs = 0;
1015  }
1016  return ret;
1017  }
1018  return 1;
1019 }
1020 
1021 #define OFFSET(x) offsetof(SegmentContext, x)
1022 #define E AV_OPT_FLAG_ENCODING_PARAM
1023 static const AVOption options[] = {
1024  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
1025  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1026  { "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 },
1027  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1028  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1029 
1030  { "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"},
1031  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
1032  { "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"},
1033 
1034  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1035 
1036  { "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" },
1037  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
1038  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
1039  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
1040  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
1041  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1042  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1043 
1044  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1045  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
1046  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
1047  { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1048  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
1049  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1050  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1051  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1052  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1053  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1054  { "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 },
1055  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1056  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1057  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1058 
1059  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1060  { "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 },
1061  { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1062  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1063  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1064  { NULL },
1065 };
1066 
1067 #if CONFIG_SEGMENT_MUXER
1068 static const AVClass seg_class = {
1069  .class_name = "segment muxer",
1070  .item_name = av_default_item_name,
1071  .option = options,
1072  .version = LIBAVUTIL_VERSION_INT,
1073 };
1074 
1076  .name = "segment",
1077  .long_name = NULL_IF_CONFIG_SMALL("segment"),
1078  .priv_data_size = sizeof(SegmentContext),
1080  .init = seg_init,
1084  .deinit = seg_free,
1085  .check_bitstream = seg_check_bitstream,
1086  .priv_class = &seg_class,
1087 };
1088 #endif
1089 
1090 #if CONFIG_STREAM_SEGMENT_MUXER
1091 static const AVClass sseg_class = {
1092  .class_name = "stream_segment muxer",
1093  .item_name = av_default_item_name,
1094  .option = options,
1095  .version = LIBAVUTIL_VERSION_INT,
1096 };
1097 
1099  .name = "stream_segment,ssegment",
1100  .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1101  .priv_data_size = sizeof(SegmentContext),
1102  .flags = AVFMT_NOFILE,
1103  .init = seg_init,
1107  .deinit = seg_free,
1108  .check_bitstream = seg_check_bitstream,
1109  .priv_class = &sseg_class,
1110 };
1111 #endif
struct SegmentListEntry * next
Definition: segment.c:52
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
#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:311
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1627
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:4827
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:233
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:1311
#define FAIL(err)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:936
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
int(* check_bitstream)(struct AVFormatContext *, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header...
Definition: avformat.h:632
#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
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
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:3876
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:502
static int seg_write_header(AVFormatContext *s)
Definition: segment.c:803
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:348
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:1351
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:575
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:1002
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:526
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:1448
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5615
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:5045
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:959
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4456
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
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
ptrdiff_t size
Definition: opengl_enc.c:101
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2512
char * format
format to use for output segment files
Definition: segment.c:77
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:581
#define av_log(a,...)
int break_non_keyframes
Definition: segment.c:118
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1370
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:1462
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:131
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2003
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1589
int individual_header_trailer
Set by a private option.
Definition: segment.c:110
#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:186
char * url
input or output URL.
Definition: avformat.h:1447
#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:3880
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:947
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:117
int reference_stream_index
Definition: segment.c:117
static int seg_init(AVFormatContext *s)
Definition: segment.c:646
int nb_times
number of elments in the times array
Definition: segment.c:101
#define OFFSET(x)
Definition: segment.c:1021
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:278
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
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:1855
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:1407
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 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 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:468
int use_strftime
flag to expand filename with strftime
Definition: segment.c:96
const char * name
Definition: avformat.h:507
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:1680
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:5775
AVDictionary * metadata
Definition: avformat.h:938
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
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:535
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
#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:842
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:4702
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:848
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:874
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:251
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
static void seg_free(AVFormatContext *s)
Definition: segment.c:638
#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:1393
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:532
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
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
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:575
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
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:4390
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
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:313
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:1551
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:465
int64_t clocktime_wrap_duration
Definition: segment.c:86
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:927
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:1022
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1066
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:444
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:1379
static const AVOption options[]
Definition: segment.c:1023
#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
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1429
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1247
static int open_null_ctx(AVIOContext **ctx)
Definition: segment.c:561
#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:1021
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:3888
int stream_index
Definition: avcodec.h:1432
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
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)
A callback for opening new IO streams.
Definition: avformat.h:1931
deprecated
Definition: segment.c:61
This structure stores compressed data.
Definition: avcodec.h:1407
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:1937
#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:1423
#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