2 * Copyright (c) 2011, Luca Barbato
4 * This file is part of Libav.
6 * Libav 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.
11 * Libav 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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * @file generic segmenter
23 * M3U8 specification can be find here:
24 * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming}
34 #include "libavutil/avassert.h"
35 #include "libavutil/log.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/parseutils.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/timestamp.h"
42 typedef struct SegmentListEntry {
44 double start_time, end_time;
47 struct SegmentListEntry *next;
51 LIST_TYPE_UNDEFINED = -1,
55 LIST_TYPE_EXT, ///< deprecated
60 #define SEGMENT_LIST_FLAG_CACHE 1
61 #define SEGMENT_LIST_FLAG_LIVE 2
64 const AVClass *class; /**< Class for private options. */
65 int segment_idx; ///< index of the segment file to write, starting from 0
66 int segment_idx_wrap; ///< number after which the index wraps
67 int segment_count; ///< number of segment files already written
68 AVOutputFormat *oformat;
70 char *format; ///< format to use for output segment files
71 char *list; ///< filename for the segment list file
72 int list_flags; ///< flags affecting list generation
73 int list_size; ///< number of entries for the segment list file
74 ListType list_type; ///< set the list type
75 AVIOContext *list_pb; ///< list file put-byte context
76 char *time_str; ///< segment duration specification string
77 int64_t time; ///< segment duration
79 char *times_str; ///< segment times specification string
80 int64_t *times; ///< list of segment interval specification
81 int nb_times; ///< number of elments in the times array
83 char *frames_str; ///< segment frame numbers specification string
84 int *frames; ///< list of frame number specification
85 int nb_frames; ///< number of elments in the frames array
88 char *time_delta_str; ///< approximation value duration used for the segment times
90 int individual_header_trailer; /**< Set by a private option. */
91 int write_header_trailer; /**< Set by a private option. */
93 int reset_timestamps; ///< reset timestamps at the begin of each segment
94 char *reference_stream_specifier; ///< reference stream specifier
95 int reference_stream_index;
97 SegmentListEntry cur_entry;
98 SegmentListEntry *segment_list_entries;
99 SegmentListEntry *segment_list_entries_end;
101 int is_first_pkt; ///< tells if it is the first packet in the segment
104 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
106 int needs_quoting = !!str[strcspn(str, "\",\n\r")];
111 for (; *str; str++) {
120 static int segment_mux_init(AVFormatContext *s)
122 SegmentContext *seg = s->priv_data;
126 seg->avf = oc = avformat_alloc_context();
128 return AVERROR(ENOMEM);
130 oc->oformat = seg->oformat;
131 oc->interrupt_callback = s->interrupt_callback;
132 av_dict_copy(&oc->metadata, s->metadata, 0);
134 for (i = 0; i < s->nb_streams; i++) {
136 AVCodecContext *icodec, *ocodec;
138 if (!(st = avformat_new_stream(oc, NULL)))
139 return AVERROR(ENOMEM);
140 icodec = s->streams[i]->codec;
142 avcodec_copy_context(ocodec, icodec);
143 if (!oc->oformat->codec_tag ||
144 av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == ocodec->codec_id ||
145 av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0) {
146 ocodec->codec_tag = icodec->codec_tag;
148 ocodec->codec_tag = 0;
150 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
156 static int set_segment_filename(AVFormatContext *s)
158 SegmentContext *seg = s->priv_data;
159 AVFormatContext *oc = seg->avf;
161 if (seg->segment_idx_wrap)
162 seg->segment_idx %= seg->segment_idx_wrap;
163 if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
164 s->filename, seg->segment_idx) < 0) {
165 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
166 return AVERROR(EINVAL);
168 av_strlcpy(seg->cur_entry.filename, oc->filename, sizeof(seg->cur_entry.filename));
172 static int segment_start(AVFormatContext *s, int write_header)
174 SegmentContext *seg = s->priv_data;
175 AVFormatContext *oc = seg->avf;
179 avformat_free_context(oc);
181 if ((err = segment_mux_init(s)) < 0)
187 if ((err = set_segment_filename(s)) < 0)
189 seg->segment_count++;
191 if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
192 &s->interrupt_callback, NULL)) < 0)
195 if (oc->oformat->priv_class && oc->priv_data)
196 av_opt_set(oc->priv_data, "resend_headers", "1", 0); /* mpegts specific */
199 if ((err = avformat_write_header(oc, NULL)) < 0)
203 seg->is_first_pkt = 1;
207 static int segment_list_open(AVFormatContext *s)
209 SegmentContext *seg = s->priv_data;
212 ret = avio_open2(&seg->list_pb, seg->list, AVIO_FLAG_WRITE,
213 &s->interrupt_callback, NULL);
217 if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
218 SegmentListEntry *entry;
219 double max_duration = 0;
221 avio_printf(seg->list_pb, "#EXTM3U\n");
222 avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
223 avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
224 avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
225 seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
227 for (entry = seg->segment_list_entries; entry; entry = entry->next)
228 max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
229 avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
230 } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
231 avio_printf(seg->list_pb, "ffconcat version 1.0\n");
237 static void segment_list_print_entry(AVIOContext *list_ioctx,
239 const SegmentListEntry *list_entry,
244 avio_printf(list_ioctx, "%s\n", list_entry->filename);
248 print_csv_escaped_str(list_ioctx, list_entry->filename);
249 avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
252 avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
253 list_entry->end_time - list_entry->start_time, list_entry->filename);
255 case LIST_TYPE_FFCONCAT:
258 if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
259 av_log(log_ctx, AV_LOG_WARNING,
260 "Error writing list entry '%s' in list file\n", list_entry->filename);
263 avio_printf(list_ioctx, "file %s\n", buf);
268 av_assert0(!"Invalid list type");
272 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
274 SegmentContext *seg = s->priv_data;
275 AVFormatContext *oc = seg->avf;
278 av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
280 ret = av_write_trailer(oc);
283 av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
287 if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
288 SegmentListEntry *entry = av_mallocz(sizeof(*entry));
290 ret = AVERROR(ENOMEM);
294 /* append new element */
295 memcpy(entry, &seg->cur_entry, sizeof(*entry));
296 if (!seg->segment_list_entries)
297 seg->segment_list_entries = seg->segment_list_entries_end = entry;
299 seg->segment_list_entries_end->next = entry;
300 seg->segment_list_entries_end = entry;
302 /* drop first item */
303 if (seg->list_size && seg->segment_count > seg->list_size) {
304 entry = seg->segment_list_entries;
305 seg->segment_list_entries = seg->segment_list_entries->next;
309 avio_close(seg->list_pb);
310 if ((ret = segment_list_open(s)) < 0)
312 for (entry = seg->segment_list_entries; entry; entry = entry->next)
313 segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
314 if (seg->list_type == LIST_TYPE_M3U8 && is_last)
315 avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
317 segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
319 avio_flush(seg->list_pb);
328 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
329 const char *times_str)
333 char *times_str1 = av_strdup(times_str);
334 char *saveptr = NULL;
337 return AVERROR(ENOMEM);
339 #define FAIL(err) ret = err; goto end
342 for (p = times_str1; *p; p++)
346 *times = av_malloc(sizeof(**times) * *nb_times);
348 av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
349 FAIL(AVERROR(ENOMEM));
353 for (i = 0; i < *nb_times; i++) {
355 char *tstr = av_strtok(p, ",", &saveptr);
358 if (!tstr || !tstr[0]) {
359 av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
361 FAIL(AVERROR(EINVAL));
364 ret = av_parse_time(&t, tstr, 1);
366 av_log(log_ctx, AV_LOG_ERROR,
367 "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
368 FAIL(AVERROR(EINVAL));
372 /* check on monotonicity */
373 if (i && (*times)[i-1] > (*times)[i]) {
374 av_log(log_ctx, AV_LOG_ERROR,
375 "Specified time %f is greater than the following time %f\n",
376 (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
377 FAIL(AVERROR(EINVAL));
386 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
387 const char *frames_str)
391 char *frames_str1 = av_strdup(frames_str);
392 char *saveptr = NULL;
395 return AVERROR(ENOMEM);
397 #define FAIL(err) ret = err; goto end
400 for (p = frames_str1; *p; p++)
404 *frames = av_malloc(sizeof(**frames) * *nb_frames);
406 av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
407 FAIL(AVERROR(ENOMEM));
411 for (i = 0; i < *nb_frames; i++) {
414 char *fstr = av_strtok(p, ",", &saveptr);
418 av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
420 FAIL(AVERROR(EINVAL));
422 f = strtol(fstr, &tailptr, 10);
423 if (*tailptr || f <= 0 || f >= INT_MAX) {
424 av_log(log_ctx, AV_LOG_ERROR,
425 "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
427 FAIL(AVERROR(EINVAL));
431 /* check on monotonicity */
432 if (i && (*frames)[i-1] > (*frames)[i]) {
433 av_log(log_ctx, AV_LOG_ERROR,
434 "Specified frame %d is greater than the following frame %d\n",
435 (*frames)[i], (*frames)[i-1]);
436 FAIL(AVERROR(EINVAL));
441 av_free(frames_str1);
445 static int open_null_ctx(AVIOContext **ctx)
447 int buf_size = 32768;
448 uint8_t *buf = av_malloc(buf_size);
450 return AVERROR(ENOMEM);
451 *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
454 return AVERROR(ENOMEM);
459 static void close_null_ctx(AVIOContext *pb)
465 static int select_reference_stream(AVFormatContext *s)
467 SegmentContext *seg = s->priv_data;
470 seg->reference_stream_index = -1;
471 if (!strcmp(seg->reference_stream_specifier, "auto")) {
472 /* select first index of type with highest priority */
473 int type_index_map[AVMEDIA_TYPE_NB];
474 static const enum AVMediaType type_priority_list[] = {
477 AVMEDIA_TYPE_SUBTITLE,
479 AVMEDIA_TYPE_ATTACHMENT
481 enum AVMediaType type;
483 for (i = 0; i < AVMEDIA_TYPE_NB; i++)
484 type_index_map[i] = -1;
486 /* select first index for each type */
487 for (i = 0; i < s->nb_streams; i++) {
488 type = s->streams[i]->codec->codec_type;
489 if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
490 /* ignore attached pictures/cover art streams */
491 && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
492 type_index_map[type] = i;
495 for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
496 type = type_priority_list[i];
497 if ((seg->reference_stream_index = type_index_map[type]) >= 0)
501 for (i = 0; i < s->nb_streams; i++) {
502 ret = avformat_match_stream_specifier(s, s->streams[i],
503 seg->reference_stream_specifier);
507 seg->reference_stream_index = i;
513 if (seg->reference_stream_index < 0) {
514 av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
515 seg->reference_stream_specifier);
516 return AVERROR(EINVAL);
522 static int seg_write_header(AVFormatContext *s)
524 SegmentContext *seg = s->priv_data;
525 AVFormatContext *oc = NULL;
528 seg->segment_count = 0;
529 if (!seg->write_header_trailer)
530 seg->individual_header_trailer = 0;
532 if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
533 av_log(s, AV_LOG_ERROR,
534 "segment_time, segment_times, and segment_frames options "
535 "are mutually exclusive, select just one of them\n");
536 return AVERROR(EINVAL);
539 if (seg->times_str) {
540 if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
542 } else if (seg->frames_str) {
543 if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
546 /* set default value if not specified */
548 seg->time_str = av_strdup("2");
549 if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
550 av_log(s, AV_LOG_ERROR,
551 "Invalid time duration specification '%s' for segment_time option\n",
557 if (seg->time_delta_str) {
558 if ((ret = av_parse_time(&seg->time_delta, seg->time_delta_str, 1)) < 0) {
559 av_log(s, AV_LOG_ERROR,
560 "Invalid time duration specification '%s' for delta option\n",
561 seg->time_delta_str);
567 if (seg->list_type == LIST_TYPE_UNDEFINED) {
568 if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
569 else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
570 else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
571 else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
572 else seg->list_type = LIST_TYPE_FLAT;
574 if ((ret = segment_list_open(s)) < 0)
577 if (seg->list_type == LIST_TYPE_EXT)
578 av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
580 if ((ret = select_reference_stream(s)) < 0)
582 av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
583 seg->reference_stream_index,
584 av_get_media_type_string(s->streams[seg->reference_stream_index]->codec->codec_type));
586 seg->oformat = av_guess_format(seg->format, s->filename, NULL);
589 ret = AVERROR_MUXER_NOT_FOUND;
592 if (seg->oformat->flags & AVFMT_NOFILE) {
593 av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
595 ret = AVERROR(EINVAL);
599 if ((ret = segment_mux_init(s)) < 0)
603 if ((ret = set_segment_filename(s)) < 0)
605 seg->segment_count++;
607 if (seg->write_header_trailer) {
608 if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
609 &s->interrupt_callback, NULL)) < 0)
612 if ((ret = open_null_ctx(&oc->pb)) < 0)
616 if ((ret = avformat_write_header(oc, NULL)) < 0) {
620 seg->is_first_pkt = 1;
622 if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
623 s->avoid_negative_ts = 1;
625 if (!seg->write_header_trailer) {
626 close_null_ctx(oc->pb);
627 if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
628 &s->interrupt_callback, NULL)) < 0)
635 avio_close(seg->list_pb);
637 avformat_free_context(seg->avf);
642 static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
644 SegmentContext *seg = s->priv_data;
645 AVFormatContext *oc = seg->avf;
646 AVStream *st = s->streams[pkt->stream_index];
647 int64_t end_pts = INT64_MAX;
648 int start_frame = INT_MAX;
652 end_pts = seg->segment_count <= seg->nb_times ?
653 seg->times[seg->segment_count-1] : INT64_MAX;
654 } else if (seg->frames) {
655 start_frame = seg->segment_count <= seg->nb_frames ?
656 seg->frames[seg->segment_count-1] : INT_MAX;
658 end_pts = seg->time * seg->segment_count;
661 av_dlog(s, "packet stream:%d pts:%s pts_time:%s is_key:%d frame:%d\n",
662 pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
663 pkt->flags & AV_PKT_FLAG_KEY,
664 pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
666 if (pkt->stream_index == seg->reference_stream_index &&
667 pkt->flags & AV_PKT_FLAG_KEY &&
668 (seg->frame_count >= start_frame ||
669 (pkt->pts != AV_NOPTS_VALUE &&
670 av_compare_ts(pkt->pts, st->time_base,
671 end_pts-seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
672 ret = segment_end(s, seg->individual_header_trailer, 0);
675 ret = segment_start(s, seg->individual_header_trailer);
682 seg->cur_entry.index = seg->segment_idx;
683 seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
684 seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
685 } else if (pkt->pts != AV_NOPTS_VALUE) {
686 seg->cur_entry.end_time =
687 FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
690 if (seg->is_first_pkt) {
691 av_log(s, AV_LOG_DEBUG, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
692 seg->avf->filename, pkt->stream_index,
693 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
694 seg->is_first_pkt = 0;
697 if (seg->reset_timestamps) {
698 av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
700 av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q),
701 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
702 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
704 /* compute new timestamps */
705 if (pkt->pts != AV_NOPTS_VALUE)
706 pkt->pts -= av_rescale_q(seg->cur_entry.start_pts, AV_TIME_BASE_Q, st->time_base);
707 if (pkt->dts != AV_NOPTS_VALUE)
708 pkt->dts -= av_rescale_q(seg->cur_entry.start_pts, AV_TIME_BASE_Q, st->time_base);
710 av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
711 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
712 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
715 ret = ff_write_chained(oc, pkt->stream_index, pkt, s);
718 if (pkt->stream_index == seg->reference_stream_index)
723 avio_close(seg->list_pb);
724 avformat_free_context(oc);
730 static int seg_write_trailer(struct AVFormatContext *s)
732 SegmentContext *seg = s->priv_data;
733 AVFormatContext *oc = seg->avf;
734 SegmentListEntry *cur, *next;
737 if (!seg->write_header_trailer) {
738 if ((ret = segment_end(s, 0, 1)) < 0)
740 open_null_ctx(&oc->pb);
741 ret = av_write_trailer(oc);
742 close_null_ctx(oc->pb);
744 ret = segment_end(s, 1, 1);
748 avio_close(seg->list_pb);
751 av_freep(&seg->times);
752 av_freep(&seg->frames);
754 cur = seg->segment_list_entries;
761 avformat_free_context(oc);
765 #define OFFSET(x) offsetof(SegmentContext, x)
766 #define E AV_OPT_FLAG_ENCODING_PARAM
767 static const AVOption options[] = {
768 { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
769 { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
770 { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
772 { "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"},
773 { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
774 { "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"},
776 { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
778 { "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" },
779 { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
780 { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
781 { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
782 { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
783 { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
784 { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
786 { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
787 { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta_str), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, E },
788 { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
789 { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
790 { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
791 { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
793 { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
794 { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
795 { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
799 static const AVClass seg_class = {
800 .class_name = "segment muxer",
801 .item_name = av_default_item_name,
803 .version = LIBAVUTIL_VERSION_INT,
806 AVOutputFormat ff_segment_muxer = {
808 .long_name = NULL_IF_CONFIG_SMALL("segment"),
809 .priv_data_size = sizeof(SegmentContext),
810 .flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
811 .write_header = seg_write_header,
812 .write_packet = seg_write_packet,
813 .write_trailer = seg_write_trailer,
814 .priv_class = &seg_class,
817 static const AVClass sseg_class = {
818 .class_name = "stream_segment muxer",
819 .item_name = av_default_item_name,
821 .version = LIBAVUTIL_VERSION_INT,
824 AVOutputFormat ff_stream_segment_muxer = {
825 .name = "stream_segment,ssegment",
826 .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
827 .priv_data_size = sizeof(SegmentContext),
828 .flags = AVFMT_NOFILE,
829 .write_header = seg_write_header,
830 .write_packet = seg_write_packet,
831 .write_trailer = seg_write_trailer,
832 .priv_class = &sseg_class,