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;
48 struct SegmentListEntry *next;
52 LIST_TYPE_UNDEFINED = -1,
56 LIST_TYPE_EXT, ///< deprecated
61 #define SEGMENT_LIST_FLAG_CACHE 1
62 #define SEGMENT_LIST_FLAG_LIVE 2
65 const AVClass *class; /**< Class for private options. */
66 int segment_idx; ///< index of the segment file to write, starting from 0
67 int segment_idx_wrap; ///< number after which the index wraps
68 int segment_count; ///< number of segment files already written
69 AVOutputFormat *oformat;
71 char *format; ///< format to use for output segment files
72 char *list; ///< filename for the segment list file
73 int list_flags; ///< flags affecting list generation
74 int list_size; ///< number of entries for the segment list file
75 ListType list_type; ///< set the list type
76 AVIOContext *list_pb; ///< list file put-byte context
77 char *time_str; ///< segment duration specification string
78 int64_t time; ///< segment duration
80 char *times_str; ///< segment times specification string
81 int64_t *times; ///< list of segment interval specification
82 int nb_times; ///< number of elments in the times array
84 char *frames_str; ///< segment frame numbers specification string
85 int *frames; ///< list of frame number specification
86 int nb_frames; ///< number of elments in the frames array
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 int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
95 char *reference_stream_specifier; ///< reference stream specifier
96 int reference_stream_index;
98 SegmentListEntry cur_entry;
99 SegmentListEntry *segment_list_entries;
100 SegmentListEntry *segment_list_entries_end;
102 int is_first_pkt; ///< tells if it is the first packet in the segment
105 static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
107 int needs_quoting = !!str[strcspn(str, "\",\n\r")];
112 for (; *str; str++) {
121 static int segment_mux_init(AVFormatContext *s)
123 SegmentContext *seg = s->priv_data;
127 seg->avf = oc = avformat_alloc_context();
129 return AVERROR(ENOMEM);
131 oc->oformat = seg->oformat;
132 oc->interrupt_callback = s->interrupt_callback;
133 av_dict_copy(&oc->metadata, s->metadata, 0);
135 for (i = 0; i < s->nb_streams; i++) {
137 AVCodecContext *icodec, *ocodec;
139 if (!(st = avformat_new_stream(oc, NULL)))
140 return AVERROR(ENOMEM);
141 icodec = s->streams[i]->codec;
143 avcodec_copy_context(ocodec, icodec);
144 if (!oc->oformat->codec_tag ||
145 av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == ocodec->codec_id ||
146 av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0) {
147 ocodec->codec_tag = icodec->codec_tag;
149 ocodec->codec_tag = 0;
151 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
157 static int set_segment_filename(AVFormatContext *s)
159 SegmentContext *seg = s->priv_data;
160 AVFormatContext *oc = seg->avf;
162 if (seg->segment_idx_wrap)
163 seg->segment_idx %= seg->segment_idx_wrap;
164 if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
165 s->filename, seg->segment_idx) < 0) {
166 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
167 return AVERROR(EINVAL);
169 av_strlcpy(seg->cur_entry.filename, oc->filename, sizeof(seg->cur_entry.filename));
173 static int segment_start(AVFormatContext *s, int write_header)
175 SegmentContext *seg = s->priv_data;
176 AVFormatContext *oc = seg->avf;
180 avformat_free_context(oc);
182 if ((err = segment_mux_init(s)) < 0)
188 if ((err = set_segment_filename(s)) < 0)
190 seg->segment_count++;
192 if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
193 &s->interrupt_callback, NULL)) < 0)
196 if (oc->oformat->priv_class && oc->priv_data)
197 av_opt_set(oc->priv_data, "resend_headers", "1", 0); /* mpegts specific */
200 if ((err = avformat_write_header(oc, NULL)) < 0)
204 seg->is_first_pkt = 1;
208 static int segment_list_open(AVFormatContext *s)
210 SegmentContext *seg = s->priv_data;
213 ret = avio_open2(&seg->list_pb, seg->list, AVIO_FLAG_WRITE,
214 &s->interrupt_callback, NULL);
218 if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
219 SegmentListEntry *entry;
220 double max_duration = 0;
222 avio_printf(seg->list_pb, "#EXTM3U\n");
223 avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
224 avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
225 avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
226 seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
228 for (entry = seg->segment_list_entries; entry; entry = entry->next)
229 max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
230 avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
231 } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
232 avio_printf(seg->list_pb, "ffconcat version 1.0\n");
238 static void segment_list_print_entry(AVIOContext *list_ioctx,
240 const SegmentListEntry *list_entry,
245 avio_printf(list_ioctx, "%s\n", list_entry->filename);
249 print_csv_escaped_str(list_ioctx, list_entry->filename);
250 avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
253 avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
254 list_entry->end_time - list_entry->start_time, list_entry->filename);
256 case LIST_TYPE_FFCONCAT:
259 if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
260 av_log(log_ctx, AV_LOG_WARNING,
261 "Error writing list entry '%s' in list file\n", list_entry->filename);
264 avio_printf(list_ioctx, "file %s\n", buf);
269 av_assert0(!"Invalid list type");
273 static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
275 SegmentContext *seg = s->priv_data;
276 AVFormatContext *oc = seg->avf;
279 av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
281 ret = av_write_trailer(oc);
284 av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
288 if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
289 SegmentListEntry *entry = av_mallocz(sizeof(*entry));
291 ret = AVERROR(ENOMEM);
295 /* append new element */
296 memcpy(entry, &seg->cur_entry, sizeof(*entry));
297 if (!seg->segment_list_entries)
298 seg->segment_list_entries = seg->segment_list_entries_end = entry;
300 seg->segment_list_entries_end->next = entry;
301 seg->segment_list_entries_end = entry;
303 /* drop first item */
304 if (seg->list_size && seg->segment_count > seg->list_size) {
305 entry = seg->segment_list_entries;
306 seg->segment_list_entries = seg->segment_list_entries->next;
310 avio_close(seg->list_pb);
311 if ((ret = segment_list_open(s)) < 0)
313 for (entry = seg->segment_list_entries; entry; entry = entry->next)
314 segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
315 if (seg->list_type == LIST_TYPE_M3U8 && is_last)
316 avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
318 segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
320 avio_flush(seg->list_pb);
329 static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
330 const char *times_str)
334 char *times_str1 = av_strdup(times_str);
335 char *saveptr = NULL;
338 return AVERROR(ENOMEM);
340 #define FAIL(err) ret = err; goto end
343 for (p = times_str1; *p; p++)
347 *times = av_malloc(sizeof(**times) * *nb_times);
349 av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
350 FAIL(AVERROR(ENOMEM));
354 for (i = 0; i < *nb_times; i++) {
356 char *tstr = av_strtok(p, ",", &saveptr);
359 if (!tstr || !tstr[0]) {
360 av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
362 FAIL(AVERROR(EINVAL));
365 ret = av_parse_time(&t, tstr, 1);
367 av_log(log_ctx, AV_LOG_ERROR,
368 "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
369 FAIL(AVERROR(EINVAL));
373 /* check on monotonicity */
374 if (i && (*times)[i-1] > (*times)[i]) {
375 av_log(log_ctx, AV_LOG_ERROR,
376 "Specified time %f is greater than the following time %f\n",
377 (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
378 FAIL(AVERROR(EINVAL));
387 static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
388 const char *frames_str)
392 char *frames_str1 = av_strdup(frames_str);
393 char *saveptr = NULL;
396 return AVERROR(ENOMEM);
398 #define FAIL(err) ret = err; goto end
401 for (p = frames_str1; *p; p++)
405 *frames = av_malloc(sizeof(**frames) * *nb_frames);
407 av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
408 FAIL(AVERROR(ENOMEM));
412 for (i = 0; i < *nb_frames; i++) {
415 char *fstr = av_strtok(p, ",", &saveptr);
419 av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
421 FAIL(AVERROR(EINVAL));
423 f = strtol(fstr, &tailptr, 10);
424 if (*tailptr || f <= 0 || f >= INT_MAX) {
425 av_log(log_ctx, AV_LOG_ERROR,
426 "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
428 FAIL(AVERROR(EINVAL));
432 /* check on monotonicity */
433 if (i && (*frames)[i-1] > (*frames)[i]) {
434 av_log(log_ctx, AV_LOG_ERROR,
435 "Specified frame %d is greater than the following frame %d\n",
436 (*frames)[i], (*frames)[i-1]);
437 FAIL(AVERROR(EINVAL));
442 av_free(frames_str1);
446 static int open_null_ctx(AVIOContext **ctx)
448 int buf_size = 32768;
449 uint8_t *buf = av_malloc(buf_size);
451 return AVERROR(ENOMEM);
452 *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
455 return AVERROR(ENOMEM);
460 static void close_null_ctx(AVIOContext *pb)
466 static int select_reference_stream(AVFormatContext *s)
468 SegmentContext *seg = s->priv_data;
471 seg->reference_stream_index = -1;
472 if (!strcmp(seg->reference_stream_specifier, "auto")) {
473 /* select first index of type with highest priority */
474 int type_index_map[AVMEDIA_TYPE_NB];
475 static const enum AVMediaType type_priority_list[] = {
478 AVMEDIA_TYPE_SUBTITLE,
480 AVMEDIA_TYPE_ATTACHMENT
482 enum AVMediaType type;
484 for (i = 0; i < AVMEDIA_TYPE_NB; i++)
485 type_index_map[i] = -1;
487 /* select first index for each type */
488 for (i = 0; i < s->nb_streams; i++) {
489 type = s->streams[i]->codec->codec_type;
490 if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
491 /* ignore attached pictures/cover art streams */
492 && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
493 type_index_map[type] = i;
496 for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
497 type = type_priority_list[i];
498 if ((seg->reference_stream_index = type_index_map[type]) >= 0)
502 for (i = 0; i < s->nb_streams; i++) {
503 ret = avformat_match_stream_specifier(s, s->streams[i],
504 seg->reference_stream_specifier);
508 seg->reference_stream_index = i;
514 if (seg->reference_stream_index < 0) {
515 av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
516 seg->reference_stream_specifier);
517 return AVERROR(EINVAL);
523 static int seg_write_header(AVFormatContext *s)
525 SegmentContext *seg = s->priv_data;
526 AVFormatContext *oc = NULL;
529 seg->segment_count = 0;
530 if (!seg->write_header_trailer)
531 seg->individual_header_trailer = 0;
533 if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
534 av_log(s, AV_LOG_ERROR,
535 "segment_time, segment_times, and segment_frames options "
536 "are mutually exclusive, select just one of them\n");
537 return AVERROR(EINVAL);
540 if (seg->times_str) {
541 if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
543 } else if (seg->frames_str) {
544 if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
547 /* set default value if not specified */
549 seg->time_str = av_strdup("2");
550 if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
551 av_log(s, AV_LOG_ERROR,
552 "Invalid time duration specification '%s' for segment_time option\n",
559 if (seg->list_type == LIST_TYPE_UNDEFINED) {
560 if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
561 else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
562 else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
563 else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
564 else seg->list_type = LIST_TYPE_FLAT;
566 if ((ret = segment_list_open(s)) < 0)
569 if (seg->list_type == LIST_TYPE_EXT)
570 av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
572 if ((ret = select_reference_stream(s)) < 0)
574 av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
575 seg->reference_stream_index,
576 av_get_media_type_string(s->streams[seg->reference_stream_index]->codec->codec_type));
578 seg->oformat = av_guess_format(seg->format, s->filename, NULL);
581 ret = AVERROR_MUXER_NOT_FOUND;
584 if (seg->oformat->flags & AVFMT_NOFILE) {
585 av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
587 ret = AVERROR(EINVAL);
591 if ((ret = segment_mux_init(s)) < 0)
595 if ((ret = set_segment_filename(s)) < 0)
597 seg->segment_count++;
599 if (seg->write_header_trailer) {
600 if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
601 &s->interrupt_callback, NULL)) < 0)
604 if ((ret = open_null_ctx(&oc->pb)) < 0)
608 if ((ret = avformat_write_header(oc, NULL)) < 0) {
612 seg->is_first_pkt = 1;
614 if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
615 s->avoid_negative_ts = 1;
617 if (!seg->write_header_trailer) {
618 close_null_ctx(oc->pb);
619 if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
620 &s->interrupt_callback, NULL)) < 0)
627 avio_close(seg->list_pb);
629 avformat_free_context(seg->avf);
634 static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
636 SegmentContext *seg = s->priv_data;
637 AVFormatContext *oc = seg->avf;
638 AVStream *st = s->streams[pkt->stream_index];
639 int64_t end_pts = INT64_MAX, offset;
640 int start_frame = INT_MAX;
644 end_pts = seg->segment_count <= seg->nb_times ?
645 seg->times[seg->segment_count-1] : INT64_MAX;
646 } else if (seg->frames) {
647 start_frame = seg->segment_count <= seg->nb_frames ?
648 seg->frames[seg->segment_count-1] : INT_MAX;
650 end_pts = seg->time * seg->segment_count;
653 av_dlog(s, "packet stream:%d pts:%s pts_time:%s is_key:%d frame:%d\n",
654 pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
655 pkt->flags & AV_PKT_FLAG_KEY,
656 pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
658 if (pkt->stream_index == seg->reference_stream_index &&
659 pkt->flags & AV_PKT_FLAG_KEY &&
660 (seg->frame_count >= start_frame ||
661 (pkt->pts != AV_NOPTS_VALUE &&
662 av_compare_ts(pkt->pts, st->time_base,
663 end_pts-seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
664 ret = segment_end(s, seg->individual_header_trailer, 0);
667 ret = segment_start(s, seg->individual_header_trailer);
674 seg->cur_entry.index = seg->segment_idx;
675 seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
676 seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
677 } else if (pkt->pts != AV_NOPTS_VALUE) {
678 seg->cur_entry.end_time =
679 FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
682 if (seg->is_first_pkt) {
683 av_log(s, AV_LOG_DEBUG, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
684 seg->avf->filename, pkt->stream_index,
685 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
686 seg->is_first_pkt = 0;
689 av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
691 av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q),
692 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
693 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
695 /* compute new timestamps */
696 offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
697 AV_TIME_BASE_Q, st->time_base);
698 if (pkt->pts != AV_NOPTS_VALUE)
700 if (pkt->dts != AV_NOPTS_VALUE)
703 av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
704 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
705 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
707 ret = ff_write_chained(oc, pkt->stream_index, pkt, s);
710 if (pkt->stream_index == seg->reference_stream_index)
715 avio_close(seg->list_pb);
716 avformat_free_context(oc);
722 static int seg_write_trailer(struct AVFormatContext *s)
724 SegmentContext *seg = s->priv_data;
725 AVFormatContext *oc = seg->avf;
726 SegmentListEntry *cur, *next;
729 if (!seg->write_header_trailer) {
730 if ((ret = segment_end(s, 0, 1)) < 0)
732 open_null_ctx(&oc->pb);
733 ret = av_write_trailer(oc);
734 close_null_ctx(oc->pb);
736 ret = segment_end(s, 1, 1);
740 avio_close(seg->list_pb);
743 av_freep(&seg->times);
744 av_freep(&seg->frames);
746 cur = seg->segment_list_entries;
753 avformat_free_context(oc);
757 #define OFFSET(x) offsetof(SegmentContext, x)
758 #define E AV_OPT_FLAG_ENCODING_PARAM
759 static const AVOption options[] = {
760 { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
761 { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
762 { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
764 { "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"},
765 { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
766 { "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"},
768 { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
770 { "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" },
771 { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
772 { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
773 { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
774 { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
775 { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
776 { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
778 { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
779 { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
780 { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
781 { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
782 { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
783 { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
785 { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
786 { "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 },
787 { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
788 { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
792 static const AVClass seg_class = {
793 .class_name = "segment muxer",
794 .item_name = av_default_item_name,
796 .version = LIBAVUTIL_VERSION_INT,
799 AVOutputFormat ff_segment_muxer = {
801 .long_name = NULL_IF_CONFIG_SMALL("segment"),
802 .priv_data_size = sizeof(SegmentContext),
803 .flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
804 .write_header = seg_write_header,
805 .write_packet = seg_write_packet,
806 .write_trailer = seg_write_trailer,
807 .priv_class = &seg_class,
810 static const AVClass sseg_class = {
811 .class_name = "stream_segment muxer",
812 .item_name = av_default_item_name,
814 .version = LIBAVUTIL_VERSION_INT,
817 AVOutputFormat ff_stream_segment_muxer = {
818 .name = "stream_segment,ssegment",
819 .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
820 .priv_data_size = sizeof(SegmentContext),
821 .flags = AVFMT_NOFILE,
822 .write_header = seg_write_header,
823 .write_packet = seg_write_packet,
824 .write_trailer = seg_write_trailer,
825 .priv_class = &sseg_class,