FFmpeg  4.3
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
79  char *list; ///< filename for the segment list file
80  int list_flags; ///< flags affecting list generation
81  int list_size; ///< number of entries for the segment list file
82 
83  int use_clocktime; ///< flag to cut segments at regular clock time
84  int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time
85  int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment
86  int64_t last_val; ///< remember last time for wrap around detection
88  int header_written; ///< whether we've already called avformat_write_header
89 
90  char *entry_prefix; ///< prefix to add to list entry filenames
91  int list_type; ///< set the list type
92  AVIOContext *list_pb; ///< list file put-byte context
93  char *time_str; ///< segment duration specification string
94  int64_t time; ///< segment duration
95  int use_strftime; ///< flag to expand filename with strftime
96  int increment_tc; ///< flag to increment timecode if found
97 
98  char *times_str; ///< segment times specification string
99  int64_t *times; ///< list of segment interval specification
100  int nb_times; ///< number of elments in the times array
101 
102  char *frames_str; ///< segment frame numbers specification string
103  int *frames; ///< list of frame number specification
104  int nb_frames; ///< number of elments in the frames array
105  int frame_count; ///< total number of reference frames
106  int segment_frame_count; ///< number of reference frames in the segment
107 
108  int64_t time_delta;
109  int individual_header_trailer; /**< Set by a private option. */
110  int write_header_trailer; /**< Set by a private option. */
111  char *header_filename; ///< filename to write the output header to
112 
113  int reset_timestamps; ///< reset timestamps at the beginning of each segment
114  int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
115  char *reference_stream_specifier; ///< reference stream specifier
119 
121  char temp_list_filename[1024];
122 
127 
128 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
129 {
130  int needs_quoting = !!str[strcspn(str, "\",\n\r")];
131 
132  if (needs_quoting)
133  avio_w8(ctx, '"');
134 
135  for (; *str; str++) {
136  if (*str == '"')
137  avio_w8(ctx, '"');
138  avio_w8(ctx, *str);
139  }
140  if (needs_quoting)
141  avio_w8(ctx, '"');
142 }
143 
145 {
146  SegmentContext *seg = s->priv_data;
147  AVFormatContext *oc;
148  int i;
149  int ret;
150 
151  ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL);
152  if (ret < 0)
153  return ret;
154  oc = seg->avf;
155 
157  oc->max_delay = s->max_delay;
158  av_dict_copy(&oc->metadata, s->metadata, 0);
159  oc->opaque = s->opaque;
160  oc->io_close = s->io_close;
161  oc->io_open = s->io_open;
162  oc->flags = s->flags;
163 
164  for (i = 0; i < s->nb_streams; i++) {
165  AVStream *st, *ist = s->streams[i];
166  AVCodecParameters *ipar = ist->codecpar, *opar;
167 
168  if (!(st = avformat_new_stream(oc, NULL)))
169  return AVERROR(ENOMEM);
170  opar = st->codecpar;
171  avcodec_parameters_copy(opar, ipar);
172  if (!oc->oformat->codec_tag ||
173  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
174  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
175  opar->codec_tag = ipar->codec_tag;
176  } else {
177  opar->codec_tag = 0;
178  }
180  st->time_base = ist->time_base;
181  st->avg_frame_rate = ist->avg_frame_rate;
182  st->disposition = ist->disposition;
183 #if FF_API_LAVF_AVCTX
185  if (ipar->codec_tag == MKTAG('t','m','c','d'))
186  st->codec->time_base = ist->codec->time_base;
188 #endif
189  av_dict_copy(&st->metadata, ist->metadata, 0);
190  }
191 
192  return 0;
193 }
194 
196 {
197  SegmentContext *seg = s->priv_data;
198  AVFormatContext *oc = seg->avf;
199  size_t size;
200  int ret;
201  char buf[1024];
202  char *new_name;
203 
204  if (seg->segment_idx_wrap)
205  seg->segment_idx %= seg->segment_idx_wrap;
206  if (seg->use_strftime) {
207  time_t now0;
208  struct tm *tm, tmpbuf;
209  time(&now0);
210  tm = localtime_r(&now0, &tmpbuf);
211  if (!strftime(buf, sizeof(buf), s->url, tm)) {
212  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
213  return AVERROR(EINVAL);
214  }
215  } else if (av_get_frame_filename(buf, sizeof(buf),
216  s->url, seg->segment_idx) < 0) {
217  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->url);
218  return AVERROR(EINVAL);
219  }
220  new_name = av_strdup(buf);
221  if (!new_name)
222  return AVERROR(ENOMEM);
223  ff_format_set_url(oc, new_name);
224 
225  /* copy modified name in list entry */
226  size = strlen(av_basename(oc->url)) + 1;
227  if (seg->entry_prefix)
228  size += strlen(seg->entry_prefix);
229 
230  if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
231  return ret;
232  snprintf(seg->cur_entry.filename, size, "%s%s",
233  seg->entry_prefix ? seg->entry_prefix : "",
234  av_basename(oc->url));
235 
236  return 0;
237 }
238 
240 {
241  SegmentContext *seg = s->priv_data;
242  AVFormatContext *oc = seg->avf;
243  int err = 0;
244 
245  if (write_header) {
247  seg->avf = NULL;
248  if ((err = segment_mux_init(s)) < 0)
249  return err;
250  oc = seg->avf;
251  }
252 
253  seg->segment_idx++;
254  if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
255  seg->segment_idx_wrap_nb++;
256 
257  if ((err = set_segment_filename(s)) < 0)
258  return err;
259 
260  if ((err = s->io_open(s, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) {
261  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
262  return err;
263  }
264  if (!seg->individual_header_trailer)
265  oc->pb->seekable = 0;
266 
267  if (oc->oformat->priv_class && oc->priv_data)
268  av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
269 
270  if (write_header) {
272  av_dict_copy(&options, seg->format_options, 0);
273  av_dict_set(&options, "fflags", "-autobsf", 0);
274  err = avformat_write_header(oc, &options);
275  av_dict_free(&options);
276  if (err < 0)
277  return err;
278  }
279 
280  seg->segment_frame_count = 0;
281  return 0;
282 }
283 
285 {
286  SegmentContext *seg = s->priv_data;
287  int ret;
288 
289  snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
290  ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
291  if (ret < 0) {
292  av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
293  return ret;
294  }
295 
296  if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
297  SegmentListEntry *entry;
298  double max_duration = 0;
299 
300  avio_printf(seg->list_pb, "#EXTM3U\n");
301  avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
302  avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
303  avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
304  seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
305 
306  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
308 
309  for (entry = seg->segment_list_entries; entry; entry = entry->next)
310  max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
311  avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
312  } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
313  avio_printf(seg->list_pb, "ffconcat version 1.0\n");
314  }
315 
316  return ret;
317 }
318 
319 static void segment_list_print_entry(AVIOContext *list_ioctx,
320  ListType list_type,
321  const SegmentListEntry *list_entry,
322  void *log_ctx)
323 {
324  switch (list_type) {
325  case LIST_TYPE_FLAT:
326  avio_printf(list_ioctx, "%s\n", list_entry->filename);
327  break;
328  case LIST_TYPE_CSV:
329  case LIST_TYPE_EXT:
330  print_csv_escaped_str(list_ioctx, list_entry->filename);
331  avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
332  break;
333  case LIST_TYPE_M3U8:
334  avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
335  list_entry->end_time - list_entry->start_time, list_entry->filename);
336  break;
337  case LIST_TYPE_FFCONCAT:
338  {
339  char *buf;
340  if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
341  av_log(log_ctx, AV_LOG_WARNING,
342  "Error writing list entry '%s' in list file\n", list_entry->filename);
343  return;
344  }
345  avio_printf(list_ioctx, "file %s\n", buf);
346  av_free(buf);
347  break;
348  }
349  default:
350  av_assert0(!"Invalid list type");
351  }
352 }
353 
354 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
355 {
356  SegmentContext *seg = s->priv_data;
357  AVFormatContext *oc = seg->avf;
358  int ret = 0;
359  AVTimecode tc;
360  AVRational rate;
361  AVDictionaryEntry *tcr;
362  char buf[AV_TIMECODE_STR_SIZE];
363  int i;
364  int err;
365 
366  if (!oc || !oc->pb)
367  return AVERROR(EINVAL);
368 
369  av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
370  if (write_trailer)
371  ret = av_write_trailer(oc);
372 
373  if (ret < 0)
374  av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
375  oc->url);
376 
377  if (seg->list) {
378  if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
379  SegmentListEntry *entry = av_mallocz(sizeof(*entry));
380  if (!entry) {
381  ret = AVERROR(ENOMEM);
382  goto end;
383  }
384 
385  /* append new element */
386  memcpy(entry, &seg->cur_entry, sizeof(*entry));
387  entry->filename = av_strdup(entry->filename);
388  if (!seg->segment_list_entries)
390  else
391  seg->segment_list_entries_end->next = entry;
392  seg->segment_list_entries_end = entry;
393 
394  /* drop first item */
395  if (seg->list_size && seg->segment_count >= seg->list_size) {
396  entry = seg->segment_list_entries;
398  av_freep(&entry->filename);
399  av_freep(&entry);
400  }
401 
402  if ((ret = segment_list_open(s)) < 0)
403  goto end;
404  for (entry = seg->segment_list_entries; entry; entry = entry->next)
405  segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
406  if (seg->list_type == LIST_TYPE_M3U8 && is_last)
407  avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
408  ff_format_io_close(s, &seg->list_pb);
409  if (seg->use_rename)
410  ff_rename(seg->temp_list_filename, seg->list, s);
411  } else {
412  segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
413  avio_flush(seg->list_pb);
414  }
415  }
416 
417  av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
418  seg->avf->url, seg->segment_count);
419  seg->segment_count++;
420 
421  if (seg->increment_tc) {
422  tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
423  if (tcr) {
424  /* search the first video stream */
425  for (i = 0; i < s->nb_streams; i++) {
427  rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
428  err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
429  if (err < 0) {
430  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, error occurred during timecode creation.\n");
431  break;
432  }
433  tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
434  av_dict_set(&s->metadata, "timecode",
435  av_timecode_make_string(&tc, buf, 0), 0);
436  break;
437  }
438  }
439  } else {
440  av_log(s, AV_LOG_WARNING, "Could not increment global timecode, no global timecode metadata found.\n");
441  }
442  for (i = 0; i < s->nb_streams; i++) {
444  char st_buf[AV_TIMECODE_STR_SIZE];
445  AVTimecode st_tc;
446  AVRational st_rate = s->streams[i]->avg_frame_rate;
447  AVDictionaryEntry *st_tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0);
448  if (st_tcr) {
449  if ((av_timecode_init_from_string(&st_tc, st_rate, st_tcr->value, s) < 0)) {
450  av_log(s, AV_LOG_WARNING, "Could not increment stream %d timecode, error occurred during timecode creation.\n", i);
451  continue;
452  }
453  st_tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(st_rate)); // increment timecode
454  av_dict_set(&s->streams[i]->metadata, "timecode", av_timecode_make_string(&st_tc, st_buf, 0), 0);
455  }
456  }
457  }
458  }
459 
460 end:
461  ff_format_io_close(oc, &oc->pb);
462 
463  return ret;
464 }
465 
466 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
467  const char *times_str)
468 {
469  char *p;
470  int i, ret = 0;
471  char *times_str1 = av_strdup(times_str);
472  char *saveptr = NULL;
473 
474  if (!times_str1)
475  return AVERROR(ENOMEM);
476 
477 #define FAIL(err) ret = err; goto end
478 
479  *nb_times = 1;
480  for (p = times_str1; *p; p++)
481  if (*p == ',')
482  (*nb_times)++;
483 
484  *times = av_malloc_array(*nb_times, sizeof(**times));
485  if (!*times) {
486  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
487  FAIL(AVERROR(ENOMEM));
488  }
489 
490  p = times_str1;
491  for (i = 0; i < *nb_times; i++) {
492  int64_t t;
493  char *tstr = av_strtok(p, ",", &saveptr);
494  p = NULL;
495 
496  if (!tstr || !tstr[0]) {
497  av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
498  times_str);
499  FAIL(AVERROR(EINVAL));
500  }
501 
502  ret = av_parse_time(&t, tstr, 1);
503  if (ret < 0) {
504  av_log(log_ctx, AV_LOG_ERROR,
505  "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
506  FAIL(AVERROR(EINVAL));
507  }
508  (*times)[i] = t;
509 
510  /* check on monotonicity */
511  if (i && (*times)[i-1] > (*times)[i]) {
512  av_log(log_ctx, AV_LOG_ERROR,
513  "Specified time %f is greater than the following time %f\n",
514  (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
515  FAIL(AVERROR(EINVAL));
516  }
517  }
518 
519 end:
520  av_free(times_str1);
521  return ret;
522 }
523 
524 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
525  const char *frames_str)
526 {
527  char *p;
528  int i, ret = 0;
529  char *frames_str1 = av_strdup(frames_str);
530  char *saveptr = NULL;
531 
532  if (!frames_str1)
533  return AVERROR(ENOMEM);
534 
535 #define FAIL(err) ret = err; goto end
536 
537  *nb_frames = 1;
538  for (p = frames_str1; *p; p++)
539  if (*p == ',')
540  (*nb_frames)++;
541 
542  *frames = av_malloc_array(*nb_frames, sizeof(**frames));
543  if (!*frames) {
544  av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
545  FAIL(AVERROR(ENOMEM));
546  }
547 
548  p = frames_str1;
549  for (i = 0; i < *nb_frames; i++) {
550  long int f;
551  char *tailptr;
552  char *fstr = av_strtok(p, ",", &saveptr);
553 
554  p = NULL;
555  if (!fstr) {
556  av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
557  frames_str);
558  FAIL(AVERROR(EINVAL));
559  }
560  f = strtol(fstr, &tailptr, 10);
561  if (*tailptr || f <= 0 || f >= INT_MAX) {
562  av_log(log_ctx, AV_LOG_ERROR,
563  "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
564  fstr);
565  FAIL(AVERROR(EINVAL));
566  }
567  (*frames)[i] = f;
568 
569  /* check on monotonicity */
570  if (i && (*frames)[i-1] > (*frames)[i]) {
571  av_log(log_ctx, AV_LOG_ERROR,
572  "Specified frame %d is greater than the following frame %d\n",
573  (*frames)[i], (*frames)[i-1]);
574  FAIL(AVERROR(EINVAL));
575  }
576  }
577 
578 end:
579  av_free(frames_str1);
580  return ret;
581 }
582 
584 {
585  int buf_size = 32768;
586  uint8_t *buf = av_malloc(buf_size);
587  if (!buf)
588  return AVERROR(ENOMEM);
589  *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
590  if (!*ctx) {
591  av_free(buf);
592  return AVERROR(ENOMEM);
593  }
594  return 0;
595 }
596 
597 static void close_null_ctxp(AVIOContext **pb)
598 {
599  av_freep(&(*pb)->buffer);
600  avio_context_free(pb);
601 }
602 
604 {
605  SegmentContext *seg = s->priv_data;
606  int ret, i;
607 
608  seg->reference_stream_index = -1;
609  if (!strcmp(seg->reference_stream_specifier, "auto")) {
610  /* select first index of type with highest priority */
611  int type_index_map[AVMEDIA_TYPE_NB];
612  static const enum AVMediaType type_priority_list[] = {
618  };
619  enum AVMediaType type;
620 
621  for (i = 0; i < AVMEDIA_TYPE_NB; i++)
622  type_index_map[i] = -1;
623 
624  /* select first index for each type */
625  for (i = 0; i < s->nb_streams; i++) {
626  type = s->streams[i]->codecpar->codec_type;
627  if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
628  /* ignore attached pictures/cover art streams */
630  type_index_map[type] = i;
631  }
632 
633  for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
634  type = type_priority_list[i];
635  if ((seg->reference_stream_index = type_index_map[type]) >= 0)
636  break;
637  }
638  } else {
639  for (i = 0; i < s->nb_streams; i++) {
642  if (ret < 0)
643  return ret;
644  if (ret > 0) {
645  seg->reference_stream_index = i;
646  break;
647  }
648  }
649  }
650 
651  if (seg->reference_stream_index < 0) {
652  av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
654  return AVERROR(EINVAL);
655  }
656 
657  return 0;
658 }
659 
661 {
662  SegmentContext *seg = s->priv_data;
663  ff_format_io_close(seg->avf, &seg->list_pb);
665  seg->avf = NULL;
666 }
667 
669 {
670  SegmentContext *seg = s->priv_data;
671  AVFormatContext *oc = seg->avf;
673  int ret;
674  int i;
675 
676  seg->segment_count = 0;
677  if (!seg->write_header_trailer)
678  seg->individual_header_trailer = 0;
679 
680  if (seg->header_filename) {
681  seg->write_header_trailer = 1;
682  seg->individual_header_trailer = 0;
683  }
684 
685  if (seg->initial_offset > 0) {
686  av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
687  "you can use output_ts_offset instead of it\n");
688  }
689 
690  if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
691  av_log(s, AV_LOG_ERROR,
692  "segment_time, segment_times, and segment_frames options "
693  "are mutually exclusive, select just one of them\n");
694  return AVERROR(EINVAL);
695  }
696 
697  if (seg->times_str) {
698  if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
699  return ret;
700  } else if (seg->frames_str) {
701  if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
702  return ret;
703  } else {
704  /* set default value if not specified */
705  if (!seg->time_str)
706  seg->time_str = av_strdup("2");
707  if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
708  av_log(s, AV_LOG_ERROR,
709  "Invalid time duration specification '%s' for segment_time option\n",
710  seg->time_str);
711  return ret;
712  }
713  if (seg->use_clocktime) {
714  if (seg->time <= 0) {
715  av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
716  return AVERROR(EINVAL);
717  }
718  seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
719  }
720  }
721 
722  if (seg->list) {
723  if (seg->list_type == LIST_TYPE_UNDEFINED) {
724  if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
725  else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
726  else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
727  else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
728  else seg->list_type = LIST_TYPE_FLAT;
729  }
730  if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
731  if ((ret = segment_list_open(s)) < 0)
732  return ret;
733  } else {
734  const char *proto = avio_find_protocol_name(seg->list);
735  seg->use_rename = proto && !strcmp(proto, "file");
736  }
737  }
738 
739  if (seg->list_type == LIST_TYPE_EXT)
740  av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
741 
742  if ((ret = select_reference_stream(s)) < 0)
743  return ret;
744  av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
747 
748  seg->oformat = av_guess_format(seg->format, s->url, NULL);
749 
750  if (!seg->oformat)
752  if (seg->oformat->flags & AVFMT_NOFILE) {
753  av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
754  seg->oformat->name);
755  return AVERROR(EINVAL);
756  }
757 
758  if ((ret = segment_mux_init(s)) < 0)
759  return ret;
760 
761  if ((ret = set_segment_filename(s)) < 0)
762  return ret;
763  oc = seg->avf;
764 
765  if (seg->write_header_trailer) {
766  if ((ret = s->io_open(s, &oc->pb,
767  seg->header_filename ? seg->header_filename : oc->url,
768  AVIO_FLAG_WRITE, NULL)) < 0) {
769  av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
770  return ret;
771  }
772  if (!seg->individual_header_trailer)
773  oc->pb->seekable = 0;
774  } else {
775  if ((ret = open_null_ctx(&oc->pb)) < 0)
776  return ret;
777  }
778 
779  av_dict_copy(&options, seg->format_options, 0);
780  av_dict_set(&options, "fflags", "-autobsf", 0);
781  ret = avformat_init_output(oc, &options);
782  if (av_dict_count(options)) {
783  av_log(s, AV_LOG_ERROR,
784  "Some of the provided format options are not recognized\n");
785  av_dict_free(&options);
786  return AVERROR(EINVAL);
787  }
788  av_dict_free(&options);
789 
790  if (ret < 0) {
791  ff_format_io_close(oc, &oc->pb);
792  return ret;
793  }
794  seg->segment_frame_count = 0;
795 
796  av_assert0(s->nb_streams == oc->nb_streams);
797  if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) {
798  ret = avformat_write_header(oc, NULL);
799  if (ret < 0)
800  return ret;
801  seg->header_written = 1;
802  }
803 
804  for (i = 0; i < s->nb_streams; i++) {
805  AVStream *inner_st = oc->streams[i];
806  AVStream *outer_st = s->streams[i];
807  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
808  }
809 
810  if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
811  s->avoid_negative_ts = 1;
812 
813  return ret;
814 }
815 
817 {
818  SegmentContext *seg = s->priv_data;
819  AVFormatContext *oc = seg->avf;
820  int ret, i;
821 
822  if (!seg->header_written) {
823  for (i = 0; i < s->nb_streams; i++) {
824  AVStream *st = oc->streams[i];
825  AVCodecParameters *ipar, *opar;
826 
827  ipar = s->streams[i]->codecpar;
828  opar = oc->streams[i]->codecpar;
829  avcodec_parameters_copy(opar, ipar);
830  if (!oc->oformat->codec_tag ||
831  av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
832  av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
833  opar->codec_tag = ipar->codec_tag;
834  } else {
835  opar->codec_tag = 0;
836  }
838  st->time_base = s->streams[i]->time_base;
839  }
840  ret = avformat_write_header(oc, NULL);
841  if (ret < 0)
842  return ret;
843  }
844 
845  if (!seg->write_header_trailer || seg->header_filename) {
846  if (seg->header_filename) {
847  av_write_frame(oc, NULL);
848  ff_format_io_close(oc, &oc->pb);
849  } else {
850  close_null_ctxp(&oc->pb);
851  }
852  if ((ret = oc->io_open(oc, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0)
853  return ret;
854  if (!seg->individual_header_trailer)
855  oc->pb->seekable = 0;
856  }
857 
858  return 0;
859 }
860 
862 {
863  SegmentContext *seg = s->priv_data;
864  AVStream *st = s->streams[pkt->stream_index];
865  int64_t end_pts = INT64_MAX, offset;
866  int start_frame = INT_MAX;
867  int ret;
868  struct tm ti;
869  int64_t usecs;
870  int64_t wrapped_val;
871 
872  if (!seg->avf || !seg->avf->pb)
873  return AVERROR(EINVAL);
874 
875  if (!st->codecpar->extradata_size) {
876  int pkt_extradata_size = 0;
877  uint8_t *pkt_extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &pkt_extradata_size);
878  if (pkt_extradata && pkt_extradata_size > 0) {
879  ret = ff_alloc_extradata(st->codecpar, pkt_extradata_size);
880  if (ret < 0) {
881  av_log(s, AV_LOG_WARNING, "Unable to add extradata to stream. Output segments may be invalid.\n");
882  goto calc_times;
883  }
884  memcpy(st->codecpar->extradata, pkt_extradata, pkt_extradata_size);
885  }
886  }
887 
888 calc_times:
889  if (seg->times) {
890  end_pts = seg->segment_count < seg->nb_times ?
891  seg->times[seg->segment_count] : INT64_MAX;
892  } else if (seg->frames) {
893  start_frame = seg->segment_count < seg->nb_frames ?
894  seg->frames[seg->segment_count] : INT_MAX;
895  } else {
896  if (seg->use_clocktime) {
897  int64_t avgt = av_gettime();
898  time_t sec = avgt / 1000000;
899  localtime_r(&sec, &ti);
900  usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
901  wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
902  if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
903  seg->cut_pending = 1;
904  seg->last_val = wrapped_val;
905  } else {
906  end_pts = seg->time * (seg->segment_count + 1);
907  }
908  }
909 
910  ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
911  pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
912  av_ts2timestr(pkt->duration, &st->time_base),
913  pkt->flags & AV_PKT_FLAG_KEY,
914  pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
915 
916  if (pkt->stream_index == seg->reference_stream_index &&
917  (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
918  (seg->segment_frame_count > 0 || seg->write_empty) &&
919  (seg->cut_pending || seg->frame_count >= start_frame ||
920  (pkt->pts != AV_NOPTS_VALUE &&
921  av_compare_ts(pkt->pts, st->time_base,
922  end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
923  /* sanitize end time in case last packet didn't have a defined duration */
924  if (seg->cur_entry.last_duration == 0)
925  seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
926 
927  if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
928  goto fail;
929 
930  if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
931  goto fail;
932 
933  seg->cut_pending = 0;
935  seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
938 
939  if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
940  goto calc_times;
941  }
942 
943  if (pkt->stream_index == seg->reference_stream_index) {
944  if (pkt->pts != AV_NOPTS_VALUE)
945  seg->cur_entry.end_time =
946  FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
947  seg->cur_entry.last_duration = pkt->duration;
948  }
949 
950  if (seg->segment_frame_count == 0) {
951  av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
952  seg->avf->url, pkt->stream_index,
953  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
954  }
955 
956  av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
957  pkt->stream_index,
959  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
960  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
961 
962  /* compute new timestamps */
963  offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
965  if (pkt->pts != AV_NOPTS_VALUE)
966  pkt->pts += offset;
967  if (pkt->dts != AV_NOPTS_VALUE)
968  pkt->dts += offset;
969 
970  av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
971  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
972  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
973 
974  ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s,
976 
977 fail:
978  if (pkt->stream_index == seg->reference_stream_index) {
979  seg->frame_count++;
980  seg->segment_frame_count++;
981  }
982 
983  return ret;
984 }
985 
987 {
988  SegmentContext *seg = s->priv_data;
989  AVFormatContext *oc = seg->avf;
990  SegmentListEntry *cur, *next;
991  int ret = 0;
992 
993  if (!oc)
994  goto fail;
995 
996  if (!seg->write_header_trailer) {
997  if ((ret = segment_end(s, 0, 1)) < 0)
998  goto fail;
999  if ((ret = open_null_ctx(&oc->pb)) < 0)
1000  goto fail;
1001  ret = av_write_trailer(oc);
1002  close_null_ctxp(&oc->pb);
1003  } else {
1004  ret = segment_end(s, 1, 1);
1005  }
1006 fail:
1007  if (seg->list)
1008  ff_format_io_close(s, &seg->list_pb);
1009 
1010  av_opt_free(seg);
1011  av_freep(&seg->times);
1012  av_freep(&seg->frames);
1013  av_freep(&seg->cur_entry.filename);
1014 
1015  cur = seg->segment_list_entries;
1016  while (cur) {
1017  next = cur->next;
1018  av_freep(&cur->filename);
1019  av_free(cur);
1020  cur = next;
1021  }
1022 
1024  seg->avf = NULL;
1025  return ret;
1026 }
1027 
1028 static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1029 {
1030  SegmentContext *seg = s->priv_data;
1031  AVFormatContext *oc = seg->avf;
1032  if (oc->oformat->check_bitstream) {
1033  int ret = oc->oformat->check_bitstream(oc, pkt);
1034  if (ret == 1) {
1035  AVStream *st = s->streams[pkt->stream_index];
1036  AVStream *ost = oc->streams[pkt->stream_index];
1037  st->internal->bsfc = ost->internal->bsfc;
1038  ost->internal->bsfc = NULL;
1039  }
1040  return ret;
1041  }
1042  return 1;
1043 }
1044 
1045 #define OFFSET(x) offsetof(SegmentContext, x)
1046 #define E AV_OPT_FLAG_ENCODING_PARAM
1047 static const AVOption options[] = {
1048  { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, 0, 0, E },
1049  { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1050  { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E },
1051  { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1052  { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1053 
1054  { "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"},
1055  { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
1056  { "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"},
1057 
1058  { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1059 
1060  { "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" },
1061  { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
1062  { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
1063  { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
1064  { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
1065  { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1066  { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
1067 
1068  { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
1069  { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
1070  { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
1071  { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1072  { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E },
1073  { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1074  { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
1075  { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1076  { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1077  { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
1078  { "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 },
1079  { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1080  { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1081  { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1082 
1083  { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
1084  { "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 },
1085  { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1086  { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
1087  { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
1088  { NULL },
1089 };
1090 
1091 #if CONFIG_SEGMENT_MUXER
1092 static const AVClass seg_class = {
1093  .class_name = "segment muxer",
1094  .item_name = av_default_item_name,
1095  .option = options,
1096  .version = LIBAVUTIL_VERSION_INT,
1097 };
1098 
1100  .name = "segment",
1101  .long_name = NULL_IF_CONFIG_SMALL("segment"),
1102  .priv_data_size = sizeof(SegmentContext),
1104  .init = seg_init,
1108  .deinit = seg_free,
1110  .priv_class = &seg_class,
1111 };
1112 #endif
1113 
1114 #if CONFIG_STREAM_SEGMENT_MUXER
1115 static const AVClass sseg_class = {
1116  .class_name = "stream_segment muxer",
1117  .item_name = av_default_item_name,
1118  .option = options,
1119  .version = LIBAVUTIL_VERSION_INT,
1120 };
1121 
1123  .name = "stream_segment,ssegment",
1124  .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
1125  .priv_data_size = sizeof(SegmentContext),
1126  .flags = AVFMT_NOFILE,
1127  .init = seg_init,
1131  .deinit = seg_free,
1133  .priv_class = &sseg_class,
1134 };
1135 #endif
struct SegmentListEntry * next
Definition: segment.c:52
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:701
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:1933
#define NULL
Definition: coverity.c:32
AVOutputFormat ff_segment_muxer
AVBSFContext * bsfc
bitstream filter to run on stream
Definition: internal.h:159
AVFormatContext * avf
Definition: segment.c:76
Bytestream IO Context.
Definition: avio.h:161
static const char * format[]
Definition: af_aiir.c:339
int size
if(ret< 0)
Definition: vf_mcdeint.c:279
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1629
char * header_filename
filename to write the output header to
Definition: segment.c:111
AVOption.
Definition: opt.h:246
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:1190
#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:90
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:4938
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:333
AVDictionary * format_options
Definition: segment.c:78
static int segment_start(AVFormatContext *s, int write_header)
Definition: segment.c:239
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:1305
#define FAIL(err)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:938
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:235
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:675
#define tc
Definition: regdef.h:69
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
static AVPacket pkt
int segment_frame_count
number of reference frames in the segment
Definition: segment.c:106
char * filename
Definition: segment.c:51
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
static int parse_frames(void *log_ctx, int **frames, int *nb_frames, const char *frames_str)
Definition: segment.c:524
static int seg_write_header(AVFormatContext *s)
Definition: segment.c:816
static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
Definition: segment.c:354
int list_flags
flags affecting list generation
Definition: segment.c:80
static int segment_mux_init(AVFormatContext *s)
Definition: segment.c:144
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
A format-specific function for interleavement.
Definition: avformat.h:566
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:597
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:1028
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:258
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT, AVFMT_TS_NEGATIVE
Definition: avformat.h:519
uint8_t
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
char temp_list_filename[1024]
Definition: segment.c:121
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: packet.h:373
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5685
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:5319
static int seg_write_trailer(struct AVFormatContext *s)
Definition: segment.c:986
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
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
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2522
char * format
format to use for output segment files
Definition: segment.c:77
static int select_reference_stream(AVFormatContext *s)
Definition: segment.c:603
#define av_log(a,...)
int break_non_keyframes
Definition: segment.c:117
int64_t time_delta
Definition: segment.c:108
int64_t initial_offset
initial timestamps offset, expressed in microseconds
Definition: segment.c:114
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:544
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:126
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#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:1591
int individual_header_trailer
Set by a private option.
Definition: segment.c:109
#define AVERROR(e)
Definition: error.h:43
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:353
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:76
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
int(* check_bitstream)(struct AVFormatContext *, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header...
Definition: avformat.h:635
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: codec_par.h:56
simple assert() macros that are a bit more flexible than ISO C assert().
int use_rename
Definition: segment.c:120
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
int avformat_alloc_output_context2(AVFormatContext **ctx, ff_const59 AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:135
int64_t * times
list of segment interval specification
Definition: segment.c:99
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
char * reference_stream_specifier
reference stream specifier
Definition: segment.c:115
#define FFMAX(a, b)
Definition: common.h:94
static int set_segment_filename(AVFormatContext *s)
Definition: segment.c:195
int64_t offset_pts
Definition: segment.c:50
#define fail()
Definition: checkasm.h:123
int reference_stream_index
Definition: segment.c:116
static int seg_init(AVFormatContext *s)
Definition: segment.c:668
int nb_times
number of elments in the times array
Definition: segment.c:100
#define OFFSET(x)
Definition: segment.c:1045
static int segment_list_open(AVFormatContext *s)
Definition: segment.c:284
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int64_t last_val
remember last time for wrap around detection
Definition: segment.c:86
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
void * opaque
User data.
Definition: avformat.h:1857
Use auto-selected escaping mode.
Definition: avstring.h:319
AVIOContext * list_pb
list file put-byte context
Definition: segment.c:92
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
int ff_rename(const char *url_src, const char *url_dst, void *logctx)
Wrap avpriv_io_move and log if error happens.
Definition: avio.c:670
static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
Definition: segment.c:128
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3321
int cut_pending
Definition: segment.c:87
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:505
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:461
int use_strftime
flag to expand filename with strftime
Definition: segment.c:95
const char * name
Definition: avformat.h:500
ff_const59 AVOutputFormat * oformat
Definition: segment.c:75
AVFormatContext * ctx
Definition: movenc.c:48
int reset_timestamps
reset timestamps at the beginning of each segment
Definition: segment.c:113
int use_clocktime
flag to cut segments at regular clock time
Definition: segment.c:83
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:1682
int increment_tc
flag to increment timecode if found
Definition: segment.c:96
void ff_format_set_url(AVFormatContext *s, char *url)
Set AVFormatContext url field to the provided pointer.
Definition: utils.c:5845
AVDictionary * metadata
Definition: avformat.h:940
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:528
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:485
#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:844
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:4787
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1370
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: segment.c:861
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:876
char * list
filename for the segment list file
Definition: segment.c:79
char * frames_str
segment frame numbers specification string
Definition: segment.c:102
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:55
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:255
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
static void seg_free(AVFormatContext *s)
Definition: segment.c:660
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int header_written
whether we&#39;ve already called avformat_write_header
Definition: segment.c:88
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:525
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:191
int64_t time
segment duration
Definition: segment.c:94
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1939
int list_type
set the list type
Definition: segment.c:91
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:103
int64_t start_pts
Definition: segment.c:49
ff_const59 AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
Definition: format.c:51
Rational number (pair of numerator and denominator).
Definition: rational.h:58
char * time_str
segment duration specification string
Definition: segment.c:93
cl_device_type type
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:233
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:4448
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:472
SegmentListEntry * segment_list_entries
Definition: segment.c:124
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:76
#define flags(name, subs,...)
Definition: cbs_av1.c:564
int nb_frames
number of elments in the frames array
Definition: segment.c:104
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:110
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:319
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:1610
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
int write_empty
Definition: segment.c:118
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:458
int64_t clocktime_wrap_duration
Definition: segment.c:85
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:143
#define SEGMENT_LIST_FLAG_CACHE
Definition: segment.c:66
#define E
Definition: segment.c:1046
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1068
#define localtime_r
Definition: time_internal.h:46
static int parse_times(void *log_ctx, int64_t **times, int *nb_times, const char *times_str)
Definition: segment.c:466
int den
Denominator.
Definition: rational.h:60
double start_time
Definition: segment.c:48
#define av_free(p)
int segment_idx_wrap_nb
number of time the index has wraped
Definition: segment.c:73
char * value
Definition: dict.h:87
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
int64_t clocktime_offset
Definition: segment.c:84
void * priv_data
Format private data.
Definition: avformat.h:1379
static const AVOption options[]
Definition: segment.c:1047
#define AV_ESCAPE_FLAG_WHITESPACE
Consider spaces special and escape them even in the middle of the string.
Definition: avstring.h:332
static int check_bitstream(AVFormatContext *s, AVStream *st, AVPacket *pkt)
Definition: mux.c:1075
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1251
static int open_null_ctx(AVIOContext **ctx)
Definition: segment.c:583
#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:1023
char * times_str
segment times specification string
Definition: segment.c:98
#define av_malloc_array(a, b)
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
int stream_index
Definition: packet.h:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
SegmentListEntry cur_entry
Definition: segment.c:123
#define MKTAG(a, b, c, d)
Definition: common.h:406
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 avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2064
int list_size
number of entries for the segment list file
Definition: segment.c:81
deprecated
Definition: segment.c:61
This structure stores compressed data.
Definition: packet.h:332
int frame_count
total number of reference frames
Definition: segment.c:105
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:465
#define SEGMENT_LIST_FLAG_LIVE
Definition: segment.c:67
SegmentListEntry * segment_list_entries_end
Definition: segment.c:125
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
#define AV_TIMECODE_STR_SIZE
Definition: timecode.h:33