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"
43 #include "libavutil/time_internal.h"
44 #include "libavutil/timestamp.h"
45
46 typedef struct SegmentListEntry {
47 int index;
48 double start_time, end_time;
49 int64_t start_pts;
50 int64_t offset_pts;
51 char *filename;
52 struct SegmentListEntry *next;
53 int64_t last_duration;
54 } SegmentListEntry;
55
56 typedef enum {
57 LIST_TYPE_UNDEFINED = -1,
58 LIST_TYPE_FLAT = 0,
59 LIST_TYPE_CSV,
60 LIST_TYPE_M3U8,
61 LIST_TYPE_EXT, ///< deprecated
62 LIST_TYPE_FFCONCAT,
63 LIST_TYPE_NB,
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
75 ff_const59 AVOutputFormat *oformat;
76 AVFormatContext *avf;
77 char *format; ///< format to use for output segment files
78 AVDictionary *format_options;
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
87 int cut_pending;
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
116 int reference_stream_index;
117 int break_non_keyframes;
118 int write_empty;
119
120 int use_rename;
121 char temp_list_filename[1024];
122
123 SegmentListEntry cur_entry;
124 SegmentListEntry *segment_list_entries;
125 SegmentListEntry *segment_list_entries_end;
126 } SegmentContext;
127
print_csv_escaped_str(AVIOContext * ctx,const char * str)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
segment_mux_init(AVFormatContext * s)144 static int segment_mux_init(AVFormatContext *s)
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
156 oc->interrupt_callback = s->interrupt_callback;
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 }
179 st->sample_aspect_ratio = ist->sample_aspect_ratio;
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
184 FF_DISABLE_DEPRECATION_WARNINGS
185 if (ipar->codec_tag == MKTAG('t','m','c','d'))
186 st->codec->time_base = ist->codec->time_base;
187 FF_ENABLE_DEPRECATION_WARNINGS
188 #endif
189 av_dict_copy(&st->metadata, ist->metadata, 0);
190 }
191
192 return 0;
193 }
194
set_segment_filename(AVFormatContext * s)195 static int set_segment_filename(AVFormatContext *s)
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
segment_start(AVFormatContext * s,int write_header)239 static int segment_start(AVFormatContext *s, int write_header)
240 {
241 SegmentContext *seg = s->priv_data;
242 AVFormatContext *oc = seg->avf;
243 int err = 0;
244
245 if (write_header) {
246 avformat_free_context(oc);
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) {
271 AVDictionary *options = NULL;
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
segment_list_open(AVFormatContext * s)284 static int segment_list_open(AVFormatContext *s)
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",
307 seg->segment_list_entries->index);
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
segment_list_print_entry(AVIOContext * list_ioctx,ListType list_type,const SegmentListEntry * list_entry,void * log_ctx)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
segment_end(AVFormatContext * s,int write_trailer,int is_last)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)
389 seg->segment_list_entries = seg->segment_list_entries_end = entry;
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;
397 seg->segment_list_entries = seg->segment_list_entries->next;
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++) {
426 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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++) {
443 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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
parse_times(void * log_ctx,int64_t ** times,int * nb_times,const char * times_str)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
parse_frames(void * log_ctx,int ** frames,int * nb_frames,const char * frames_str)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
open_null_ctx(AVIOContext ** ctx)583 static int open_null_ctx(AVIOContext **ctx)
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
close_null_ctxp(AVIOContext ** pb)597 static void close_null_ctxp(AVIOContext **pb)
598 {
599 av_freep(&(*pb)->buffer);
600 avio_context_free(pb);
601 }
602
select_reference_stream(AVFormatContext * s)603 static int select_reference_stream(AVFormatContext *s)
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[] = {
613 AVMEDIA_TYPE_VIDEO,
614 AVMEDIA_TYPE_AUDIO,
615 AVMEDIA_TYPE_SUBTITLE,
616 AVMEDIA_TYPE_DATA,
617 AVMEDIA_TYPE_ATTACHMENT
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 */
629 && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
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++) {
640 ret = avformat_match_stream_specifier(s, s->streams[i],
641 seg->reference_stream_specifier);
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",
653 seg->reference_stream_specifier);
654 return AVERROR(EINVAL);
655 }
656
657 return 0;
658 }
659
seg_free(AVFormatContext * s)660 static void seg_free(AVFormatContext *s)
661 {
662 SegmentContext *seg = s->priv_data;
663 ff_format_io_close(seg->avf, &seg->list_pb);
664 avformat_free_context(seg->avf);
665 seg->avf = NULL;
666 }
667
seg_init(AVFormatContext * s)668 static int seg_init(AVFormatContext *s)
669 {
670 SegmentContext *seg = s->priv_data;
671 AVFormatContext *oc = seg->avf;
672 AVDictionary *options = NULL;
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",
745 seg->reference_stream_index,
746 av_get_media_type_string(s->streams[seg->reference_stream_index]->codecpar->codec_type));
747
748 seg->oformat = av_guess_format(seg->format, s->url, NULL);
749
750 if (!seg->oformat)
751 return AVERROR_MUXER_NOT_FOUND;
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
seg_write_header(AVFormatContext * s)816 static int seg_write_header(AVFormatContext *s)
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 }
837 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
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
seg_write_packet(AVFormatContext * s,AVPacket * pkt)861 static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
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;
934 seg->cur_entry.index = seg->segment_idx + seg->segment_idx_wrap * seg->segment_idx_wrap_nb;
935 seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
936 seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
937 seg->cur_entry.end_time = seg->cur_entry.start_time;
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,
958 av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q),
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),
964 AV_TIME_BASE_Q, st->time_base);
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,
975 seg->initial_offset || seg->reset_timestamps || seg->avf->oformat->interleave_packet);
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
seg_write_trailer(struct AVFormatContext * s)986 static int seg_write_trailer(struct AVFormatContext *s)
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
1023 avformat_free_context(oc);
1024 seg->avf = NULL;
1025 return ret;
1026 }
1027
seg_check_bitstream(struct AVFormatContext * s,const AVPacket * pkt)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
1099 AVOutputFormat ff_segment_muxer = {
1100 .name = "segment",
1101 .long_name = NULL_IF_CONFIG_SMALL("segment"),
1102 .priv_data_size = sizeof(SegmentContext),
1103 .flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
1104 .init = seg_init,
1105 .write_header = seg_write_header,
1106 .write_packet = seg_write_packet,
1107 .write_trailer = seg_write_trailer,
1108 .deinit = seg_free,
1109 .check_bitstream = seg_check_bitstream,
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
1122 AVOutputFormat ff_stream_segment_muxer = {
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,
1128 .write_header = seg_write_header,
1129 .write_packet = seg_write_packet,
1130 .write_trailer = seg_write_trailer,
1131 .deinit = seg_free,
1132 .check_bitstream = seg_check_bitstream,
1133 .priv_class = &sseg_class,
1134 };
1135 #endif
1136