2 * MPEG-DASH ISO BMFF segmenter
3 * Copyright (c) 2014 Martin Storsjo
4 * Copyright (c) 2018 Akamai Technologies, Inc.
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "libavutil/avassert.h"
29 #include "libavutil/avutil.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/rational.h"
35 #include "libavutil/time_internal.h"
39 #include "avio_internal.h"
40 #include "hlsplaylist.h"
41 #if CONFIG_HTTP_PROTOCOL
46 #include "os_support.h"
50 typedef struct Segment {
53 int range_length, index_length;
59 typedef struct AdaptationSet {
61 enum AVMediaType media_type;
62 AVDictionary *metadata;
63 AVRational min_frame_rate, max_frame_rate;
64 int ambiguous_frame_rate;
67 typedef struct OutputStream {
69 int ctx_inited, as_idx;
74 int64_t init_start_pos, pos;
75 int init_range_length;
76 int nb_segments, segments_size, segment_index;
78 int64_t first_pts, start_pts, max_pts;
81 char bandwidth_str[64];
90 typedef struct DASHContext {
91 const AVClass *class; /* Class for private options. */
92 char *adaptation_sets;
96 int extra_window_size;
102 OutputStream *streams;
104 int64_t last_duration;
105 int64_t total_duration;
106 char availability_start_time[100];
108 const char *single_file_name;
109 const char *init_seg_name;
110 const char *media_seg_name;
111 const char *utc_timing_url;
112 const char *user_agent;
115 int master_playlist_created;
116 AVIOContext *mpd_out;
117 AVIOContext *m3u8_out;
121 static struct codec_string {
125 { AV_CODEC_ID_VP8, "vp8" },
126 { AV_CODEC_ID_VP9, "vp9" },
127 { AV_CODEC_ID_VORBIS, "vorbis" },
128 { AV_CODEC_ID_OPUS, "opus" },
132 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
133 AVDictionary **options) {
134 DASHContext *c = s->priv_data;
135 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
136 int err = AVERROR_MUXER_NOT_FOUND;
137 if (!*pb || !http_base_proto || !c->http_persistent) {
138 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
139 #if CONFIG_HTTP_PROTOCOL
141 URLContext *http_url_context = ffio_geturlcontext(*pb);
142 av_assert0(http_url_context);
143 err = ff_http_do_new_request(http_url_context, filename);
149 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
150 DASHContext *c = s->priv_data;
151 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
153 if (!http_base_proto || !c->http_persistent) {
154 ff_format_io_close(s, pb);
155 #if CONFIG_HTTP_PROTOCOL
157 URLContext *http_url_context = ffio_geturlcontext(*pb);
158 av_assert0(http_url_context);
160 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
165 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
168 const AVCodecTag *tags[2] = { NULL, NULL };
172 // common Webm codecs are not part of RFC 6381
173 for (i = 0; codecs[i].id; i++)
174 if (codecs[i].id == par->codec_id) {
175 av_strlcpy(str, codecs[i].str, size);
179 // for codecs part of RFC 6381
180 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
181 tags[0] = ff_codec_movvideo_tags;
182 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
183 tags[0] = ff_codec_movaudio_tags;
187 tag = av_codec_get_tag(tags, par->codec_id);
195 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
197 tags[0] = ff_mp4_obj_type;
198 oti = av_codec_get_tag(tags, par->codec_id);
200 av_strlcatf(str, size, ".%02"PRIx32, oti);
204 if (tag == MKTAG('m', 'p', '4', 'a')) {
205 if (par->extradata_size >= 2) {
206 int aot = par->extradata[0] >> 3;
208 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
209 av_strlcatf(str, size, ".%d", aot);
211 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
212 // Unimplemented, should output ProfileLevelIndication as a decimal number
213 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
215 } else if (!strcmp(str, "avc1")) {
216 uint8_t *tmpbuf = NULL;
217 uint8_t *extradata = par->extradata;
218 int extradata_size = par->extradata_size;
221 if (extradata[0] != 1) {
223 if (avio_open_dyn_buf(&pb) < 0)
225 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
226 ffio_free_dyn_buf(&pb);
229 extradata_size = avio_close_dyn_buf(pb, &extradata);
233 if (extradata_size >= 4)
234 av_strlcatf(str, size, ".%02x%02x%02x",
235 extradata[1], extradata[2], extradata[3]);
240 static int flush_dynbuf(OutputStream *os, int *range_length)
245 return AVERROR(EINVAL);
249 av_write_frame(os->ctx, NULL);
250 avio_flush(os->ctx->pb);
253 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
255 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
260 return avio_open_dyn_buf(&os->ctx->pb);
263 static void set_http_options(AVDictionary **options, DASHContext *c)
266 av_dict_set(options, "user_agent", c->user_agent, 0);
267 if (c->http_persistent)
268 av_dict_set_int(options, "multiple_requests", 1, 0);
271 static void get_hls_playlist_name(char *playlist_name, int string_size,
272 const char *base_url, int id) {
274 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
276 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
279 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
281 DASHContext *c = s->priv_data;
282 int ret, range_length;
284 ret = flush_dynbuf(os, &range_length);
288 os->pos = os->init_range_length = range_length;
290 ff_format_io_close(s, &os->out);
294 static void dash_free(AVFormatContext *s)
296 DASHContext *c = s->priv_data;
300 for (i = 0; i < c->nb_as; i++)
301 av_dict_free(&c->as[i].metadata);
308 for (i = 0; i < s->nb_streams; i++) {
309 OutputStream *os = &c->streams[i];
310 if (os->ctx && os->ctx_inited)
311 av_write_trailer(os->ctx);
312 if (os->ctx && os->ctx->pb)
313 ffio_free_dyn_buf(&os->ctx->pb);
314 ff_format_io_close(s, &os->out);
316 avformat_free_context(os->ctx);
317 for (j = 0; j < os->nb_segments; j++)
318 av_free(os->segments[j]);
319 av_free(os->segments);
321 av_freep(&c->streams);
323 ff_format_io_close(s, &c->mpd_out);
324 ff_format_io_close(s, &c->m3u8_out);
327 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
328 int representation_id, int final)
330 DASHContext *c = s->priv_data;
331 int i, start_index = 0, start_number = 1;
332 if (c->window_size) {
333 start_index = FFMAX(os->nb_segments - c->window_size, 0);
334 start_number = FFMAX(os->segment_index - c->window_size, 1);
337 if (c->use_template) {
338 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
339 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
340 if (!c->use_timeline)
341 avio_printf(out, "duration=\"%"PRId64"\" ", c->last_duration);
342 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
343 if (c->use_timeline) {
344 int64_t cur_time = 0;
345 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
346 for (i = start_index; i < os->nb_segments; ) {
347 Segment *seg = os->segments[i];
349 avio_printf(out, "\t\t\t\t\t\t<S ");
350 if (i == start_index || seg->time != cur_time) {
351 cur_time = seg->time;
352 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
354 avio_printf(out, "d=\"%d\" ", seg->duration);
355 while (i + repeat + 1 < os->nb_segments &&
356 os->segments[i + repeat + 1]->duration == seg->duration &&
357 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
360 avio_printf(out, "r=\"%d\" ", repeat);
361 avio_printf(out, "/>\n");
363 cur_time += (1 + repeat) * seg->duration;
365 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
367 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
368 } else if (c->single_file) {
369 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
370 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
371 avio_printf(out, "\t\t\t\t\t<Initialization range=\"%"PRId64"-%"PRId64"\" />\n", os->init_start_pos, os->init_start_pos + os->init_range_length - 1);
372 for (i = start_index; i < os->nb_segments; i++) {
373 Segment *seg = os->segments[i];
374 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
375 if (seg->index_length)
376 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
377 avio_printf(out, "/>\n");
379 avio_printf(out, "\t\t\t\t</SegmentList>\n");
381 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
382 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
383 for (i = start_index; i < os->nb_segments; i++) {
384 Segment *seg = os->segments[i];
385 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
387 avio_printf(out, "\t\t\t\t</SegmentList>\n");
389 if (c->hls_playlist && start_index < os->nb_segments)
391 int timescale = os->ctx->streams[0]->time_base.den;
392 char temp_filename_hls[1024];
393 char filename_hls[1024];
394 AVDictionary *http_opts = NULL;
395 int target_duration = 0;
397 const char *proto = avio_find_protocol_name(c->dirname);
398 int use_rename = proto && !strcmp(proto, "file");
400 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
401 c->dirname, representation_id);
403 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
405 set_http_options(&http_opts, c);
406 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
407 av_dict_free(&http_opts);
408 for (i = start_index; i < os->nb_segments; i++) {
409 Segment *seg = os->segments[i];
410 double duration = (double) seg->duration / timescale;
411 if (target_duration <= duration)
412 target_duration = lrint(duration);
415 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
416 start_number, PLAYLIST_TYPE_NONE);
418 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
419 os->init_range_length, os->init_start_pos);
421 for (i = start_index; i < os->nb_segments; i++) {
422 Segment *seg = os->segments[i];
423 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
424 (double) seg->duration / timescale, 0,
425 seg->range_length, seg->start_pos, NULL,
426 c->single_file ? os->initfile : seg->file,
429 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
434 ff_hls_write_end_list(c->m3u8_out);
436 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
439 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
440 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
446 static char *xmlescape(const char *str) {
447 int outlen = strlen(str)*3/2 + 6;
448 char *out = av_realloc(NULL, outlen + 1);
452 for (; *str; str++) {
453 if (pos + 6 > outlen) {
455 outlen = 2 * outlen + 6;
456 tmp = av_realloc(out, outlen + 1);
464 memcpy(&out[pos], "&", 5);
466 } else if (*str == '<') {
467 memcpy(&out[pos], "<", 4);
469 } else if (*str == '>') {
470 memcpy(&out[pos], ">", 4);
472 } else if (*str == '\'') {
473 memcpy(&out[pos], "'", 6);
475 } else if (*str == '\"') {
476 memcpy(&out[pos], """, 6);
486 static void write_time(AVIOContext *out, int64_t time)
488 int seconds = time / AV_TIME_BASE;
489 int fractions = time % AV_TIME_BASE;
490 int minutes = seconds / 60;
491 int hours = minutes / 60;
494 avio_printf(out, "PT");
496 avio_printf(out, "%dH", hours);
497 if (hours || minutes)
498 avio_printf(out, "%dM", minutes);
499 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
502 static void format_date_now(char *buf, int size)
504 time_t t = time(NULL);
505 struct tm *ptm, tmbuf;
506 ptm = gmtime_r(&t, &tmbuf);
508 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
513 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
516 DASHContext *c = s->priv_data;
517 AdaptationSet *as = &c->as[as_index];
518 AVDictionaryEntry *lang, *role;
521 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
522 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
523 if (as->media_type == AVMEDIA_TYPE_VIDEO && as->max_frame_rate.num && !as->ambiguous_frame_rate && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
524 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
525 lang = av_dict_get(as->metadata, "language", NULL, 0);
527 avio_printf(out, " lang=\"%s\"", lang->value);
528 avio_printf(out, ">\n");
530 role = av_dict_get(as->metadata, "role", NULL, 0);
532 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
534 for (i = 0; i < s->nb_streams; i++) {
535 OutputStream *os = &c->streams[i];
537 if (os->as_idx - 1 != as_index)
540 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
541 AVStream *st = s->streams[i];
542 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
543 i, os->format_name, os->codec_str, os->bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
544 if (st->avg_frame_rate.num)
545 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
546 avio_printf(out, ">\n");
548 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
549 i, os->format_name, os->codec_str, os->bandwidth_str, s->streams[i]->codecpar->sample_rate);
550 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
551 s->streams[i]->codecpar->channels);
553 output_segment_list(os, out, s, i, final);
554 avio_printf(out, "\t\t\t</Representation>\n");
556 avio_printf(out, "\t\t</AdaptationSet>\n");
561 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
563 DASHContext *c = s->priv_data;
565 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
567 return AVERROR(ENOMEM);
571 *as = &c->as[c->nb_as - 1];
572 memset(*as, 0, sizeof(**as));
573 (*as)->media_type = type;
578 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
580 DASHContext *c = s->priv_data;
581 AdaptationSet *as = &c->as[as_idx - 1];
582 OutputStream *os = &c->streams[i];
584 if (as->media_type != s->streams[i]->codecpar->codec_type) {
585 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
586 return AVERROR(EINVAL);
587 } else if (os->as_idx) {
588 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
589 return AVERROR(EINVAL);
596 static int parse_adaptation_sets(AVFormatContext *s)
598 DASHContext *c = s->priv_data;
599 const char *p = c->adaptation_sets;
600 enum { new_set, parse_id, parsing_streams } state;
604 // default: one AdaptationSet for each stream
606 for (i = 0; i < s->nb_streams; i++) {
607 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
609 snprintf(as->id, sizeof(as->id), "%d", i);
611 c->streams[i].as_idx = c->nb_as;
616 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
622 } else if (state == new_set && av_strstart(p, "id=", &p)) {
624 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
628 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
634 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
635 state = parsing_streams;
636 } else if (state == parsing_streams) {
637 AdaptationSet *as = &c->as[c->nb_as - 1];
638 char idx_str[8], *end_str;
640 n = strcspn(p, " ,");
641 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
644 // if value is "a" or "v", map all streams of that type
645 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
646 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
647 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
649 for (i = 0; i < s->nb_streams; i++) {
650 if (s->streams[i]->codecpar->codec_type != type)
653 as->media_type = s->streams[i]->codecpar->codec_type;
655 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
658 } else { // select single stream
659 i = strtol(idx_str, &end_str, 10);
660 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
661 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
662 return AVERROR(EINVAL);
664 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
666 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
667 as->media_type = s->streams[i]->codecpar->codec_type;
670 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
679 return AVERROR(EINVAL);
684 // check for unassigned streams
685 for (i = 0; i < s->nb_streams; i++) {
686 OutputStream *os = &c->streams[i];
688 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
689 return AVERROR(EINVAL);
695 static int write_manifest(AVFormatContext *s, int final)
697 DASHContext *c = s->priv_data;
699 char temp_filename[1024];
701 const char *proto = avio_find_protocol_name(s->url);
702 int use_rename = proto && !strcmp(proto, "file");
703 static unsigned int warned_non_file = 0;
704 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
705 AVDictionary *opts = NULL;
707 if (!use_rename && !warned_non_file++)
708 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
710 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
711 set_http_options(&opts, c);
712 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
714 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
719 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
720 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
721 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
722 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
723 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
724 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
725 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
727 avio_printf(out, "\tmediaPresentationDuration=\"");
728 write_time(out, c->total_duration);
729 avio_printf(out, "\"\n");
731 int64_t update_period = c->last_duration / AV_TIME_BASE;
733 if (c->use_template && !c->use_timeline)
735 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
736 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
737 if (!c->availability_start_time[0] && s->nb_streams > 0 && c->streams[0].nb_segments > 0) {
738 format_date_now(c->availability_start_time, sizeof(c->availability_start_time));
740 if (c->availability_start_time[0])
741 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
742 format_date_now(now_str, sizeof(now_str));
744 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
745 if (c->window_size && c->use_template) {
746 avio_printf(out, "\ttimeShiftBufferDepth=\"");
747 write_time(out, c->last_duration * c->window_size);
748 avio_printf(out, "\"\n");
751 avio_printf(out, "\tminBufferTime=\"");
752 write_time(out, c->last_duration * 2);
753 avio_printf(out, "\">\n");
754 avio_printf(out, "\t<ProgramInformation>\n");
756 char *escaped = xmlescape(title->value);
757 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
760 avio_printf(out, "\t</ProgramInformation>\n");
762 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
763 OutputStream *os = &c->streams[0];
764 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
765 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
766 avio_printf(out, "\t<Period id=\"0\" start=\"");
767 write_time(out, start_time);
768 avio_printf(out, "\">\n");
770 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
773 for (i = 0; i < c->nb_as; i++) {
774 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
777 avio_printf(out, "\t</Period>\n");
779 if (c->utc_timing_url)
780 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
782 avio_printf(out, "</MPD>\n");
784 dashenc_io_close(s, &c->mpd_out, temp_filename);
787 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
791 if (c->hls_playlist && !c->master_playlist_created) {
792 char filename_hls[1024];
793 const char *audio_group = "A1";
795 int max_audio_bitrate = 0;
798 snprintf(filename_hls, sizeof(filename_hls), "%s/master.m3u8", c->dirname);
800 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
802 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
804 set_http_options(&opts, c);
805 ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, NULL, &opts);
807 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
812 ff_hls_write_playlist_version(out, 6);
814 for (i = 0; i < s->nb_streams; i++) {
815 char playlist_file[64];
816 AVStream *st = s->streams[i];
817 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
819 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
820 ff_hls_write_audio_rendition(out, (char *)audio_group,
821 playlist_file, i, is_default);
822 max_audio_bitrate = FFMAX(st->codecpar->bit_rate, max_audio_bitrate);
826 for (i = 0; i < s->nb_streams; i++) {
827 char playlist_file[64];
828 AVStream *st = s->streams[i];
830 int stream_bitrate = st->codecpar->bit_rate;
831 if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && max_audio_bitrate) {
832 agroup = (char *)audio_group;
833 stream_bitrate += max_audio_bitrate;
835 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
836 ff_hls_write_stream_info(st, out, stream_bitrate, playlist_file, agroup, NULL, NULL);
840 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
842 c->master_playlist_created = 1;
848 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
850 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
852 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
856 static int dash_init(AVFormatContext *s)
858 DASHContext *c = s->priv_data;
863 if (c->single_file_name)
868 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
869 ptr = strrchr(c->dirname, '/');
871 av_strlcpy(basename, &ptr[1], sizeof(basename));
874 c->dirname[0] = '\0';
875 av_strlcpy(basename, s->url, sizeof(basename));
878 ptr = strrchr(basename, '.');
882 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
884 return AVERROR(ENOMEM);
886 if ((ret = parse_adaptation_sets(s)) < 0)
889 for (i = 0; i < s->nb_streams; i++) {
890 OutputStream *os = &c->streams[i];
891 AdaptationSet *as = &c->as[os->as_idx - 1];
892 AVFormatContext *ctx;
894 AVDictionary *opts = NULL;
897 os->bit_rate = s->streams[i]->codecpar->bit_rate;
899 snprintf(os->bandwidth_str, sizeof(os->bandwidth_str),
900 " bandwidth=\"%d\"", os->bit_rate);
902 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
903 AV_LOG_ERROR : AV_LOG_WARNING;
904 av_log(s, level, "No bit rate set for stream %d\n", i);
905 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
906 return AVERROR(EINVAL);
909 // copy AdaptationSet language and role from stream metadata
910 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
911 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
913 ctx = avformat_alloc_context();
915 return AVERROR(ENOMEM);
917 // choose muxer based on codec: webm for VP8/9 and opus, mp4 otherwise
918 // note: os->format_name is also used as part of the mimetype of the
919 // representation, e.g. video/<format_name>
920 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP8 ||
921 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP9 ||
922 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
923 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VORBIS) {
924 snprintf(os->format_name, sizeof(os->format_name), "webm");
926 snprintf(os->format_name, sizeof(os->format_name), "mp4");
928 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
930 return AVERROR_MUXER_NOT_FOUND;
932 ctx->interrupt_callback = s->interrupt_callback;
933 ctx->opaque = s->opaque;
934 ctx->io_close = s->io_close;
935 ctx->io_open = s->io_open;
937 if (!(st = avformat_new_stream(ctx, NULL)))
938 return AVERROR(ENOMEM);
939 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
940 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
941 st->time_base = s->streams[i]->time_base;
942 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
943 ctx->avoid_negative_ts = s->avoid_negative_ts;
944 ctx->flags = s->flags;
946 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
949 if (c->single_file) {
950 if (c->single_file_name)
951 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
953 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
955 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
957 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
958 set_http_options(&opts, c);
959 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
963 os->init_start_pos = 0;
965 if (!strcmp(os->format_name, "mp4")) {
967 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
969 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
971 av_dict_set_int(&opts, "cluster_time_limit", c->min_seg_duration / 1000, 0);
972 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
973 av_dict_set_int(&opts, "dash", 1, 0);
974 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
975 av_dict_set_int(&opts, "live", 1, 0);
977 if ((ret = avformat_init_output(ctx, &opts)) < 0)
983 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
985 // Flush init segment
986 // except for mp4, since delay_moov is set and the init segment
987 // is then flushed after the first packets
988 if (strcmp(os->format_name, "mp4")) {
989 flush_init_segment(s, os);
992 s->streams[i]->time_base = st->time_base;
993 // If the muxer wants to shift timestamps, request to have them shifted
994 // already before being handed to this muxer, so we don't have mismatches
995 // between the MPD and the actual segments.
996 s->avoid_negative_ts = ctx->avoid_negative_ts;
997 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
998 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
999 if (avg_frame_rate.num > 0) {
1000 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1001 as->min_frame_rate = avg_frame_rate;
1002 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1003 as->max_frame_rate = avg_frame_rate;
1005 as->ambiguous_frame_rate = 1;
1010 set_codec_str(s, st->codecpar, os->codec_str, sizeof(os->codec_str));
1011 os->first_pts = AV_NOPTS_VALUE;
1012 os->max_pts = AV_NOPTS_VALUE;
1013 os->last_dts = AV_NOPTS_VALUE;
1014 os->segment_index = 1;
1017 if (!c->has_video && c->min_seg_duration <= 0) {
1018 av_log(s, AV_LOG_WARNING, "no video stream and no min seg duration set\n");
1019 return AVERROR(EINVAL);
1024 static int dash_write_header(AVFormatContext *s)
1026 DASHContext *c = s->priv_data;
1028 for (i = 0; i < s->nb_streams; i++) {
1029 OutputStream *os = &c->streams[i];
1030 if ((ret = avformat_write_header(os->ctx, NULL)) < 0) {
1035 ret = write_manifest(s, 0);
1037 av_log(s, AV_LOG_VERBOSE, "Manifest written to: %s\n", s->url);
1041 static int add_segment(OutputStream *os, const char *file,
1042 int64_t time, int duration,
1043 int64_t start_pos, int64_t range_length,
1044 int64_t index_length)
1048 if (os->nb_segments >= os->segments_size) {
1049 os->segments_size = (os->segments_size + 1) * 2;
1050 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1051 os->segments_size)) < 0) {
1052 os->segments_size = 0;
1053 os->nb_segments = 0;
1057 seg = av_mallocz(sizeof(*seg));
1059 return AVERROR(ENOMEM);
1060 av_strlcpy(seg->file, file, sizeof(seg->file));
1062 seg->duration = duration;
1063 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1064 seg->duration += seg->time;
1067 seg->start_pos = start_pos;
1068 seg->range_length = range_length;
1069 seg->index_length = index_length;
1070 os->segments[os->nb_segments++] = seg;
1071 os->segment_index++;
1075 static void write_styp(AVIOContext *pb)
1078 ffio_wfourcc(pb, "styp");
1079 ffio_wfourcc(pb, "msdh");
1080 avio_wb32(pb, 0); /* minor */
1081 ffio_wfourcc(pb, "msdh");
1082 ffio_wfourcc(pb, "msix");
1085 static void find_index_range(AVFormatContext *s, const char *full_path,
1086 int64_t pos, int *index_length)
1092 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1095 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1096 ff_format_io_close(s, &pb);
1099 ret = avio_read(pb, buf, 8);
1100 ff_format_io_close(s, &pb);
1103 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1105 *index_length = AV_RB32(&buf[0]);
1108 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1109 AVCodecParameters *par)
1113 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1116 extradata = av_malloc(par->extradata_size);
1119 return AVERROR(ENOMEM);
1121 memcpy(extradata, par->extradata, par->extradata_size);
1123 os->ctx->streams[0]->codecpar->extradata = extradata;
1124 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1126 set_codec_str(s, par, os->codec_str, sizeof(os->codec_str));
1131 static int dash_flush(AVFormatContext *s, int final, int stream)
1133 DASHContext *c = s->priv_data;
1136 const char *proto = avio_find_protocol_name(s->url);
1137 int use_rename = proto && !strcmp(proto, "file");
1139 int cur_flush_segment_index = 0;
1141 cur_flush_segment_index = c->streams[stream].segment_index;
1143 for (i = 0; i < s->nb_streams; i++) {
1144 OutputStream *os = &c->streams[i];
1145 AVStream *st = s->streams[i];
1146 int range_length, index_length = 0;
1148 if (!os->packets_written)
1151 // Flush the single stream that got a keyframe right now.
1152 // Flush all audio streams as well, in sync with video keyframes,
1153 // but not the other video streams.
1154 if (stream >= 0 && i != stream) {
1155 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1157 // Make sure we don't flush audio streams multiple times, when
1158 // all video streams are flushed one at a time.
1159 if (c->has_video && os->segment_index > cur_flush_segment_index)
1163 if (!c->single_file) {
1164 if (!strcmp(os->format_name, "mp4") && !os->written_len)
1165 write_styp(os->ctx->pb);
1167 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1170 ret = flush_dynbuf(os, &range_length);
1173 os->packets_written = 0;
1175 if (c->single_file) {
1176 find_index_range(s, os->full_path, os->pos, &index_length);
1178 dashenc_io_close(s, &os->out, os->temp_path);
1181 ret = avpriv_io_move(os->temp_path, os->full_path);
1187 if (!os->bit_rate) {
1188 // calculate average bitrate of first segment
1189 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1193 os->bit_rate = bitrate;
1194 snprintf(os->bandwidth_str, sizeof(os->bandwidth_str),
1195 " bandwidth=\"%d\"", os->bit_rate);
1198 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length);
1199 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1201 os->pos += range_length;
1204 if (c->window_size || (final && c->remove_at_exit)) {
1205 for (i = 0; i < s->nb_streams; i++) {
1206 OutputStream *os = &c->streams[i];
1208 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1209 if (final && c->remove_at_exit)
1210 remove = os->nb_segments;
1212 for (j = 0; j < remove; j++) {
1213 char filename[1024];
1214 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1216 av_free(os->segments[j]);
1218 os->nb_segments -= remove;
1219 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1225 ret = write_manifest(s, final);
1229 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1231 DASHContext *c = s->priv_data;
1232 AVStream *st = s->streams[pkt->stream_index];
1233 OutputStream *os = &c->streams[pkt->stream_index];
1236 ret = update_stream_extradata(s, os, st->codecpar);
1240 // Fill in a heuristic guess of the packet duration, if none is available.
1241 // The mp4 muxer will do something similar (for the last packet in a fragment)
1242 // if nothing is set (setting it for the other packets doesn't hurt).
1243 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1244 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1245 // so that we know the exact timestamps of fragments.
1246 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1247 pkt->duration = pkt->dts - os->last_dts;
1248 os->last_dts = pkt->dts;
1250 // If forcing the stream to start at 0, the mp4 muxer will set the start
1251 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1252 if (os->first_pts == AV_NOPTS_VALUE &&
1253 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1254 pkt->pts -= pkt->dts;
1258 if (os->first_pts == AV_NOPTS_VALUE)
1259 os->first_pts = pkt->pts;
1261 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1262 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1263 av_compare_ts(pkt->pts - os->start_pts, st->time_base,
1264 c->min_seg_duration, AV_TIME_BASE_Q) >= 0) {
1265 int64_t prev_duration = c->last_duration;
1267 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1270 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1274 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1275 if (c->last_duration < prev_duration*9/10 ||
1276 c->last_duration > prev_duration*11/10) {
1277 av_log(s, AV_LOG_WARNING,
1278 "Segment durations differ too much, enable use_timeline "
1279 "and use_template, or keep a stricter keyframe interval\n");
1283 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1287 if (!os->packets_written) {
1288 // If we wrote a previous segment, adjust the start time of the segment
1289 // to the end of the previous one (which is the same as the mp4 muxer
1290 // does). This avoids gaps in the timeline.
1291 if (os->max_pts != AV_NOPTS_VALUE)
1292 os->start_pts = os->max_pts;
1294 os->start_pts = pkt->pts;
1296 if (os->max_pts == AV_NOPTS_VALUE)
1297 os->max_pts = pkt->pts + pkt->duration;
1299 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1300 os->packets_written++;
1301 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1304 if (!os->init_range_length)
1305 flush_init_segment(s, os);
1307 //open the output context when the first frame of a segment is ready
1308 if (!c->single_file && !os->out) {
1309 AVDictionary *opts = NULL;
1310 const char *proto = avio_find_protocol_name(s->filename);
1311 int use_rename = proto && !strcmp(proto, "file");
1312 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1313 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1314 c->media_seg_name, pkt->stream_index,
1315 os->segment_index, os->bit_rate, os->start_pts);
1316 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1318 snprintf(os->temp_path, sizeof(os->temp_path),
1319 use_rename ? "%s.tmp" : "%s", os->full_path);
1320 set_http_options(&opts, c);
1321 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1324 av_dict_free(&opts);
1327 //write out the data immediately in streaming mode
1328 if (c->streaming && !strcmp(os->format_name, "mp4")) {
1330 uint8_t *buf = NULL;
1331 if (!os->written_len)
1332 write_styp(os->ctx->pb);
1333 avio_flush(os->ctx->pb);
1334 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1335 avio_write(os->out, buf + os->written_len, len - os->written_len);
1336 os->written_len = len;
1337 avio_flush(os->out);
1343 static int dash_write_trailer(AVFormatContext *s)
1345 DASHContext *c = s->priv_data;
1347 if (s->nb_streams > 0) {
1348 OutputStream *os = &c->streams[0];
1349 // If no segments have been written so far, try to do a crude
1350 // guess of the segment duration
1351 if (!c->last_duration)
1352 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1353 s->streams[0]->time_base,
1355 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1356 s->streams[0]->time_base,
1359 dash_flush(s, 1, -1);
1361 if (c->remove_at_exit) {
1362 char filename[1024];
1364 for (i = 0; i < s->nb_streams; i++) {
1365 OutputStream *os = &c->streams[i];
1366 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1375 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1377 DASHContext *c = s->priv_data;
1378 OutputStream *os = &c->streams[avpkt->stream_index];
1379 AVFormatContext *oc = os->ctx;
1380 if (oc->oformat->check_bitstream) {
1382 AVPacket pkt = *avpkt;
1383 pkt.stream_index = 0;
1384 ret = oc->oformat->check_bitstream(oc, &pkt);
1386 AVStream *st = s->streams[avpkt->stream_index];
1387 AVStream *ost = oc->streams[0];
1388 st->internal->bsfcs = ost->internal->bsfcs;
1389 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1390 ost->internal->bsfcs = NULL;
1391 ost->internal->nb_bsfcs = 0;
1398 #define OFFSET(x) offsetof(DASHContext, x)
1399 #define E AV_OPT_FLAG_ENCODING_PARAM
1400 static const AVOption options[] = {
1401 { "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
1402 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1403 { "extra_window_size", "number of segments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
1404 { "min_seg_duration", "minimum segment duration (in microseconds)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT, { .i64 = 5000000 }, 0, INT_MAX, E },
1405 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1406 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1407 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1408 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1409 { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
1410 { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.m4s"}, 0, 0, E },
1411 { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.m4s"}, 0, 0, E },
1412 { "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E },
1413 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1414 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1415 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1416 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1420 static const AVClass dash_class = {
1421 .class_name = "dash muxer",
1422 .item_name = av_default_item_name,
1424 .version = LIBAVUTIL_VERSION_INT,
1427 AVOutputFormat ff_dash_muxer = {
1429 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1430 .extensions = "mpd",
1431 .priv_data_size = sizeof(DASHContext),
1432 .audio_codec = AV_CODEC_ID_AAC,
1433 .video_codec = AV_CODEC_ID_H264,
1434 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1436 .write_header = dash_write_header,
1437 .write_packet = dash_write_packet,
1438 .write_trailer = dash_write_trailer,
1439 .deinit = dash_free,
1440 .check_bitstream = dash_check_bitstream,
1441 .priv_class = &dash_class,