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;
97 #if FF_API_DASH_MIN_SEG_DURATION
100 int64_t seg_duration;
105 OutputStream *streams;
107 int64_t last_duration;
108 int64_t total_duration;
109 char availability_start_time[100];
111 const char *single_file_name;
112 const char *init_seg_name;
113 const char *media_seg_name;
114 const char *utc_timing_url;
116 const char *user_agent;
119 int master_playlist_created;
120 AVIOContext *mpd_out;
121 AVIOContext *m3u8_out;
126 static struct codec_string {
130 { AV_CODEC_ID_VP8, "vp8" },
131 { AV_CODEC_ID_VP9, "vp9" },
132 { AV_CODEC_ID_VORBIS, "vorbis" },
133 { AV_CODEC_ID_OPUS, "opus" },
137 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
138 AVDictionary **options) {
139 DASHContext *c = s->priv_data;
140 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
141 int err = AVERROR_MUXER_NOT_FOUND;
142 if (!*pb || !http_base_proto || !c->http_persistent) {
143 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
144 #if CONFIG_HTTP_PROTOCOL
146 URLContext *http_url_context = ffio_geturlcontext(*pb);
147 av_assert0(http_url_context);
148 err = ff_http_do_new_request(http_url_context, filename);
154 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
155 DASHContext *c = s->priv_data;
156 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
158 if (!http_base_proto || !c->http_persistent) {
159 ff_format_io_close(s, pb);
160 #if CONFIG_HTTP_PROTOCOL
162 URLContext *http_url_context = ffio_geturlcontext(*pb);
163 av_assert0(http_url_context);
165 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
170 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
173 const AVCodecTag *tags[2] = { NULL, NULL };
177 // common Webm codecs are not part of RFC 6381
178 for (i = 0; codecs[i].id; i++)
179 if (codecs[i].id == par->codec_id) {
180 av_strlcpy(str, codecs[i].str, size);
184 // for codecs part of RFC 6381
185 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
186 tags[0] = ff_codec_movvideo_tags;
187 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
188 tags[0] = ff_codec_movaudio_tags;
192 tag = av_codec_get_tag(tags, par->codec_id);
200 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
202 tags[0] = ff_mp4_obj_type;
203 oti = av_codec_get_tag(tags, par->codec_id);
205 av_strlcatf(str, size, ".%02"PRIx32, oti);
209 if (tag == MKTAG('m', 'p', '4', 'a')) {
210 if (par->extradata_size >= 2) {
211 int aot = par->extradata[0] >> 3;
213 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
214 av_strlcatf(str, size, ".%d", aot);
216 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
217 // Unimplemented, should output ProfileLevelIndication as a decimal number
218 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
220 } else if (!strcmp(str, "avc1")) {
221 uint8_t *tmpbuf = NULL;
222 uint8_t *extradata = par->extradata;
223 int extradata_size = par->extradata_size;
226 if (extradata[0] != 1) {
228 if (avio_open_dyn_buf(&pb) < 0)
230 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
231 ffio_free_dyn_buf(&pb);
234 extradata_size = avio_close_dyn_buf(pb, &extradata);
238 if (extradata_size >= 4)
239 av_strlcatf(str, size, ".%02x%02x%02x",
240 extradata[1], extradata[2], extradata[3]);
245 static int flush_dynbuf(OutputStream *os, int *range_length)
250 return AVERROR(EINVAL);
254 av_write_frame(os->ctx, NULL);
255 avio_flush(os->ctx->pb);
258 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
260 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
265 return avio_open_dyn_buf(&os->ctx->pb);
268 static void set_http_options(AVDictionary **options, DASHContext *c)
271 av_dict_set(options, "method", c->method, 0);
273 av_dict_set(options, "user_agent", c->user_agent, 0);
274 if (c->http_persistent)
275 av_dict_set_int(options, "multiple_requests", 1, 0);
277 av_dict_set_int(options, "timeout", c->timeout, 0);
280 static void get_hls_playlist_name(char *playlist_name, int string_size,
281 const char *base_url, int id) {
283 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
285 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
288 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
290 DASHContext *c = s->priv_data;
291 int ret, range_length;
293 ret = flush_dynbuf(os, &range_length);
297 os->pos = os->init_range_length = range_length;
299 ff_format_io_close(s, &os->out);
303 static void dash_free(AVFormatContext *s)
305 DASHContext *c = s->priv_data;
309 for (i = 0; i < c->nb_as; i++)
310 av_dict_free(&c->as[i].metadata);
317 for (i = 0; i < s->nb_streams; i++) {
318 OutputStream *os = &c->streams[i];
319 if (os->ctx && os->ctx_inited)
320 av_write_trailer(os->ctx);
321 if (os->ctx && os->ctx->pb)
322 ffio_free_dyn_buf(&os->ctx->pb);
323 ff_format_io_close(s, &os->out);
325 avformat_free_context(os->ctx);
326 for (j = 0; j < os->nb_segments; j++)
327 av_free(os->segments[j]);
328 av_free(os->segments);
330 av_freep(&c->streams);
332 ff_format_io_close(s, &c->mpd_out);
333 ff_format_io_close(s, &c->m3u8_out);
336 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
337 int representation_id, int final)
339 DASHContext *c = s->priv_data;
340 int i, start_index = 0, start_number = 1;
341 if (c->window_size) {
342 start_index = FFMAX(os->nb_segments - c->window_size, 0);
343 start_number = FFMAX(os->segment_index - c->window_size, 1);
346 if (c->use_template) {
347 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
348 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
349 if (!c->use_timeline)
350 avio_printf(out, "duration=\"%"PRId64"\" ", c->last_duration);
351 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
352 if (c->use_timeline) {
353 int64_t cur_time = 0;
354 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
355 for (i = start_index; i < os->nb_segments; ) {
356 Segment *seg = os->segments[i];
358 avio_printf(out, "\t\t\t\t\t\t<S ");
359 if (i == start_index || seg->time != cur_time) {
360 cur_time = seg->time;
361 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
363 avio_printf(out, "d=\"%d\" ", seg->duration);
364 while (i + repeat + 1 < os->nb_segments &&
365 os->segments[i + repeat + 1]->duration == seg->duration &&
366 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
369 avio_printf(out, "r=\"%d\" ", repeat);
370 avio_printf(out, "/>\n");
372 cur_time += (1 + repeat) * seg->duration;
374 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
376 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
377 } else if (c->single_file) {
378 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
379 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
380 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);
381 for (i = start_index; i < os->nb_segments; i++) {
382 Segment *seg = os->segments[i];
383 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
384 if (seg->index_length)
385 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
386 avio_printf(out, "/>\n");
388 avio_printf(out, "\t\t\t\t</SegmentList>\n");
390 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
391 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
392 for (i = start_index; i < os->nb_segments; i++) {
393 Segment *seg = os->segments[i];
394 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
396 avio_printf(out, "\t\t\t\t</SegmentList>\n");
398 if (c->hls_playlist && start_index < os->nb_segments)
400 int timescale = os->ctx->streams[0]->time_base.den;
401 char temp_filename_hls[1024];
402 char filename_hls[1024];
403 AVDictionary *http_opts = NULL;
404 int target_duration = 0;
406 const char *proto = avio_find_protocol_name(c->dirname);
407 int use_rename = proto && !strcmp(proto, "file");
409 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
410 c->dirname, representation_id);
412 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
414 set_http_options(&http_opts, c);
415 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
416 av_dict_free(&http_opts);
417 for (i = start_index; i < os->nb_segments; i++) {
418 Segment *seg = os->segments[i];
419 double duration = (double) seg->duration / timescale;
420 if (target_duration <= duration)
421 target_duration = lrint(duration);
424 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
425 start_number, PLAYLIST_TYPE_NONE);
427 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
428 os->init_range_length, os->init_start_pos);
430 for (i = start_index; i < os->nb_segments; i++) {
431 Segment *seg = os->segments[i];
432 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
433 (double) seg->duration / timescale, 0,
434 seg->range_length, seg->start_pos, NULL,
435 c->single_file ? os->initfile : seg->file,
438 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
443 ff_hls_write_end_list(c->m3u8_out);
445 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
448 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
449 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
455 static char *xmlescape(const char *str) {
456 int outlen = strlen(str)*3/2 + 6;
457 char *out = av_realloc(NULL, outlen + 1);
461 for (; *str; str++) {
462 if (pos + 6 > outlen) {
464 outlen = 2 * outlen + 6;
465 tmp = av_realloc(out, outlen + 1);
473 memcpy(&out[pos], "&", 5);
475 } else if (*str == '<') {
476 memcpy(&out[pos], "<", 4);
478 } else if (*str == '>') {
479 memcpy(&out[pos], ">", 4);
481 } else if (*str == '\'') {
482 memcpy(&out[pos], "'", 6);
484 } else if (*str == '\"') {
485 memcpy(&out[pos], """, 6);
495 static void write_time(AVIOContext *out, int64_t time)
497 int seconds = time / AV_TIME_BASE;
498 int fractions = time % AV_TIME_BASE;
499 int minutes = seconds / 60;
500 int hours = minutes / 60;
503 avio_printf(out, "PT");
505 avio_printf(out, "%dH", hours);
506 if (hours || minutes)
507 avio_printf(out, "%dM", minutes);
508 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
511 static void format_date_now(char *buf, int size)
513 time_t t = time(NULL);
514 struct tm *ptm, tmbuf;
515 ptm = gmtime_r(&t, &tmbuf);
517 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
522 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
525 DASHContext *c = s->priv_data;
526 AdaptationSet *as = &c->as[as_index];
527 AVDictionaryEntry *lang, *role;
530 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
531 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
532 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)
533 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
534 lang = av_dict_get(as->metadata, "language", NULL, 0);
536 avio_printf(out, " lang=\"%s\"", lang->value);
537 avio_printf(out, ">\n");
539 role = av_dict_get(as->metadata, "role", NULL, 0);
541 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
543 for (i = 0; i < s->nb_streams; i++) {
544 OutputStream *os = &c->streams[i];
546 if (os->as_idx - 1 != as_index)
549 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
550 AVStream *st = s->streams[i];
551 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
552 i, os->format_name, os->codec_str, os->bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
553 if (st->avg_frame_rate.num)
554 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
555 avio_printf(out, ">\n");
557 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
558 i, os->format_name, os->codec_str, os->bandwidth_str, s->streams[i]->codecpar->sample_rate);
559 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
560 s->streams[i]->codecpar->channels);
562 output_segment_list(os, out, s, i, final);
563 avio_printf(out, "\t\t\t</Representation>\n");
565 avio_printf(out, "\t\t</AdaptationSet>\n");
570 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
572 DASHContext *c = s->priv_data;
574 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
576 return AVERROR(ENOMEM);
580 *as = &c->as[c->nb_as - 1];
581 memset(*as, 0, sizeof(**as));
582 (*as)->media_type = type;
587 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
589 DASHContext *c = s->priv_data;
590 AdaptationSet *as = &c->as[as_idx - 1];
591 OutputStream *os = &c->streams[i];
593 if (as->media_type != s->streams[i]->codecpar->codec_type) {
594 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
595 return AVERROR(EINVAL);
596 } else if (os->as_idx) {
597 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
598 return AVERROR(EINVAL);
605 static int parse_adaptation_sets(AVFormatContext *s)
607 DASHContext *c = s->priv_data;
608 const char *p = c->adaptation_sets;
609 enum { new_set, parse_id, parsing_streams } state;
613 // default: one AdaptationSet for each stream
615 for (i = 0; i < s->nb_streams; i++) {
616 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
618 snprintf(as->id, sizeof(as->id), "%d", i);
620 c->streams[i].as_idx = c->nb_as;
625 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
631 } else if (state == new_set && av_strstart(p, "id=", &p)) {
633 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
637 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
643 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
644 state = parsing_streams;
645 } else if (state == parsing_streams) {
646 AdaptationSet *as = &c->as[c->nb_as - 1];
647 char idx_str[8], *end_str;
649 n = strcspn(p, " ,");
650 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
653 // if value is "a" or "v", map all streams of that type
654 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
655 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
656 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
658 for (i = 0; i < s->nb_streams; i++) {
659 if (s->streams[i]->codecpar->codec_type != type)
662 as->media_type = s->streams[i]->codecpar->codec_type;
664 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
667 } else { // select single stream
668 i = strtol(idx_str, &end_str, 10);
669 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
670 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
671 return AVERROR(EINVAL);
673 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
675 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
676 as->media_type = s->streams[i]->codecpar->codec_type;
679 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
688 return AVERROR(EINVAL);
693 // check for unassigned streams
694 for (i = 0; i < s->nb_streams; i++) {
695 OutputStream *os = &c->streams[i];
697 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
698 return AVERROR(EINVAL);
704 static int write_manifest(AVFormatContext *s, int final)
706 DASHContext *c = s->priv_data;
708 char temp_filename[1024];
710 const char *proto = avio_find_protocol_name(s->url);
711 int use_rename = proto && !strcmp(proto, "file");
712 static unsigned int warned_non_file = 0;
713 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
714 AVDictionary *opts = NULL;
716 if (!use_rename && !warned_non_file++)
717 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
719 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
720 set_http_options(&opts, c);
721 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
723 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
728 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
729 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
730 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
731 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
732 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
733 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
734 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
736 avio_printf(out, "\tmediaPresentationDuration=\"");
737 write_time(out, c->total_duration);
738 avio_printf(out, "\"\n");
740 int64_t update_period = c->last_duration / AV_TIME_BASE;
742 if (c->use_template && !c->use_timeline)
744 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
745 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
746 if (!c->availability_start_time[0] && s->nb_streams > 0 && c->streams[0].nb_segments > 0) {
747 format_date_now(c->availability_start_time, sizeof(c->availability_start_time));
749 if (c->availability_start_time[0])
750 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
751 format_date_now(now_str, sizeof(now_str));
753 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
754 if (c->window_size && c->use_template) {
755 avio_printf(out, "\ttimeShiftBufferDepth=\"");
756 write_time(out, c->last_duration * c->window_size);
757 avio_printf(out, "\"\n");
760 avio_printf(out, "\tminBufferTime=\"");
761 write_time(out, c->last_duration * 2);
762 avio_printf(out, "\">\n");
763 avio_printf(out, "\t<ProgramInformation>\n");
765 char *escaped = xmlescape(title->value);
766 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
769 avio_printf(out, "\t</ProgramInformation>\n");
771 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
772 OutputStream *os = &c->streams[0];
773 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
774 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
775 avio_printf(out, "\t<Period id=\"0\" start=\"");
776 write_time(out, start_time);
777 avio_printf(out, "\">\n");
779 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
782 for (i = 0; i < c->nb_as; i++) {
783 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
786 avio_printf(out, "\t</Period>\n");
788 if (c->utc_timing_url)
789 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
791 avio_printf(out, "</MPD>\n");
793 dashenc_io_close(s, &c->mpd_out, temp_filename);
796 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
800 if (c->hls_playlist && !c->master_playlist_created) {
801 char filename_hls[1024];
802 const char *audio_group = "A1";
804 int max_audio_bitrate = 0;
807 snprintf(filename_hls, sizeof(filename_hls), "%s/master.m3u8", c->dirname);
809 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
811 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
813 set_http_options(&opts, c);
814 ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, NULL, &opts);
816 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
821 ff_hls_write_playlist_version(out, 6);
823 for (i = 0; i < s->nb_streams; i++) {
824 char playlist_file[64];
825 AVStream *st = s->streams[i];
826 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
828 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
829 ff_hls_write_audio_rendition(out, (char *)audio_group,
830 playlist_file, i, is_default);
831 max_audio_bitrate = FFMAX(st->codecpar->bit_rate, max_audio_bitrate);
835 for (i = 0; i < s->nb_streams; i++) {
836 char playlist_file[64];
837 AVStream *st = s->streams[i];
839 int stream_bitrate = st->codecpar->bit_rate;
840 if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && max_audio_bitrate) {
841 agroup = (char *)audio_group;
842 stream_bitrate += max_audio_bitrate;
844 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
845 ff_hls_write_stream_info(st, out, stream_bitrate, playlist_file, agroup, NULL, NULL);
849 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
851 c->master_playlist_created = 1;
857 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
859 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
861 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
865 static int dash_init(AVFormatContext *s)
867 DASHContext *c = s->priv_data;
872 if (c->single_file_name)
877 #if FF_API_DASH_MIN_SEG_DURATION
878 if (c->min_seg_duration != 5000000) {
879 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
880 c->seg_duration = c->min_seg_duration;
884 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
885 ptr = strrchr(c->dirname, '/');
887 av_strlcpy(basename, &ptr[1], sizeof(basename));
890 c->dirname[0] = '\0';
891 av_strlcpy(basename, s->url, sizeof(basename));
894 ptr = strrchr(basename, '.');
898 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
900 return AVERROR(ENOMEM);
902 if ((ret = parse_adaptation_sets(s)) < 0)
905 for (i = 0; i < s->nb_streams; i++) {
906 OutputStream *os = &c->streams[i];
907 AdaptationSet *as = &c->as[os->as_idx - 1];
908 AVFormatContext *ctx;
910 AVDictionary *opts = NULL;
913 os->bit_rate = s->streams[i]->codecpar->bit_rate;
915 snprintf(os->bandwidth_str, sizeof(os->bandwidth_str),
916 " bandwidth=\"%d\"", os->bit_rate);
918 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
919 AV_LOG_ERROR : AV_LOG_WARNING;
920 av_log(s, level, "No bit rate set for stream %d\n", i);
921 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
922 return AVERROR(EINVAL);
925 // copy AdaptationSet language and role from stream metadata
926 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
927 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
929 ctx = avformat_alloc_context();
931 return AVERROR(ENOMEM);
933 // choose muxer based on codec: webm for VP8/9 and opus, mp4 otherwise
934 // note: os->format_name is also used as part of the mimetype of the
935 // representation, e.g. video/<format_name>
936 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP8 ||
937 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP9 ||
938 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
939 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VORBIS) {
940 snprintf(os->format_name, sizeof(os->format_name), "webm");
942 snprintf(os->format_name, sizeof(os->format_name), "mp4");
944 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
946 return AVERROR_MUXER_NOT_FOUND;
948 ctx->interrupt_callback = s->interrupt_callback;
949 ctx->opaque = s->opaque;
950 ctx->io_close = s->io_close;
951 ctx->io_open = s->io_open;
953 if (!(st = avformat_new_stream(ctx, NULL)))
954 return AVERROR(ENOMEM);
955 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
956 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
957 st->time_base = s->streams[i]->time_base;
958 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
959 ctx->avoid_negative_ts = s->avoid_negative_ts;
960 ctx->flags = s->flags;
962 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
965 if (c->single_file) {
966 if (c->single_file_name)
967 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
969 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
971 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
973 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
974 set_http_options(&opts, c);
975 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
979 os->init_start_pos = 0;
981 if (!strcmp(os->format_name, "mp4")) {
983 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
985 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
987 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
988 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
989 av_dict_set_int(&opts, "dash", 1, 0);
990 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
991 av_dict_set_int(&opts, "live", 1, 0);
993 if ((ret = avformat_init_output(ctx, &opts)) < 0)
999 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1001 // Flush init segment
1002 // except for mp4, since delay_moov is set and the init segment
1003 // is then flushed after the first packets
1004 if (strcmp(os->format_name, "mp4")) {
1005 flush_init_segment(s, os);
1008 s->streams[i]->time_base = st->time_base;
1009 // If the muxer wants to shift timestamps, request to have them shifted
1010 // already before being handed to this muxer, so we don't have mismatches
1011 // between the MPD and the actual segments.
1012 s->avoid_negative_ts = ctx->avoid_negative_ts;
1013 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1014 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1015 if (avg_frame_rate.num > 0) {
1016 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1017 as->min_frame_rate = avg_frame_rate;
1018 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1019 as->max_frame_rate = avg_frame_rate;
1021 as->ambiguous_frame_rate = 1;
1026 set_codec_str(s, st->codecpar, os->codec_str, sizeof(os->codec_str));
1027 os->first_pts = AV_NOPTS_VALUE;
1028 os->max_pts = AV_NOPTS_VALUE;
1029 os->last_dts = AV_NOPTS_VALUE;
1030 os->segment_index = 1;
1033 if (!c->has_video && c->seg_duration <= 0) {
1034 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1035 return AVERROR(EINVAL);
1040 static int dash_write_header(AVFormatContext *s)
1042 DASHContext *c = s->priv_data;
1044 for (i = 0; i < s->nb_streams; i++) {
1045 OutputStream *os = &c->streams[i];
1046 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1049 ret = write_manifest(s, 0);
1051 av_log(s, AV_LOG_VERBOSE, "Manifest written to: %s\n", s->url);
1055 static int add_segment(OutputStream *os, const char *file,
1056 int64_t time, int duration,
1057 int64_t start_pos, int64_t range_length,
1058 int64_t index_length)
1062 if (os->nb_segments >= os->segments_size) {
1063 os->segments_size = (os->segments_size + 1) * 2;
1064 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1065 os->segments_size)) < 0) {
1066 os->segments_size = 0;
1067 os->nb_segments = 0;
1071 seg = av_mallocz(sizeof(*seg));
1073 return AVERROR(ENOMEM);
1074 av_strlcpy(seg->file, file, sizeof(seg->file));
1076 seg->duration = duration;
1077 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1078 seg->duration += seg->time;
1081 seg->start_pos = start_pos;
1082 seg->range_length = range_length;
1083 seg->index_length = index_length;
1084 os->segments[os->nb_segments++] = seg;
1085 os->segment_index++;
1089 static void write_styp(AVIOContext *pb)
1092 ffio_wfourcc(pb, "styp");
1093 ffio_wfourcc(pb, "msdh");
1094 avio_wb32(pb, 0); /* minor */
1095 ffio_wfourcc(pb, "msdh");
1096 ffio_wfourcc(pb, "msix");
1099 static void find_index_range(AVFormatContext *s, const char *full_path,
1100 int64_t pos, int *index_length)
1106 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1109 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1110 ff_format_io_close(s, &pb);
1113 ret = avio_read(pb, buf, 8);
1114 ff_format_io_close(s, &pb);
1117 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1119 *index_length = AV_RB32(&buf[0]);
1122 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1123 AVCodecParameters *par)
1127 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1130 extradata = av_malloc(par->extradata_size);
1133 return AVERROR(ENOMEM);
1135 memcpy(extradata, par->extradata, par->extradata_size);
1137 os->ctx->streams[0]->codecpar->extradata = extradata;
1138 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1140 set_codec_str(s, par, os->codec_str, sizeof(os->codec_str));
1145 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1146 DASHContext *c = s->priv_data;
1147 int http_base_proto = ff_is_http_proto(filename);
1149 if (http_base_proto) {
1150 AVIOContext *out = NULL;
1151 AVDictionary *http_opts = NULL;
1153 set_http_options(&http_opts, c);
1154 av_dict_set(&http_opts, "method", "DELETE", 0);
1156 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1157 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1160 av_dict_free(&http_opts);
1161 dashenc_io_close(s, &out, filename);
1162 } else if (unlink(filename) < 0) {
1163 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1167 static int dash_flush(AVFormatContext *s, int final, int stream)
1169 DASHContext *c = s->priv_data;
1172 const char *proto = avio_find_protocol_name(s->url);
1173 int use_rename = proto && !strcmp(proto, "file");
1175 int cur_flush_segment_index = 0;
1177 cur_flush_segment_index = c->streams[stream].segment_index;
1179 for (i = 0; i < s->nb_streams; i++) {
1180 OutputStream *os = &c->streams[i];
1181 AVStream *st = s->streams[i];
1182 int range_length, index_length = 0;
1184 if (!os->packets_written)
1187 // Flush the single stream that got a keyframe right now.
1188 // Flush all audio streams as well, in sync with video keyframes,
1189 // but not the other video streams.
1190 if (stream >= 0 && i != stream) {
1191 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1193 // Make sure we don't flush audio streams multiple times, when
1194 // all video streams are flushed one at a time.
1195 if (c->has_video && os->segment_index > cur_flush_segment_index)
1199 if (!c->single_file) {
1200 if (!strcmp(os->format_name, "mp4") && !os->written_len)
1201 write_styp(os->ctx->pb);
1203 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1206 ret = flush_dynbuf(os, &range_length);
1209 os->packets_written = 0;
1211 if (c->single_file) {
1212 find_index_range(s, os->full_path, os->pos, &index_length);
1214 dashenc_io_close(s, &os->out, os->temp_path);
1217 ret = avpriv_io_move(os->temp_path, os->full_path);
1223 if (!os->bit_rate) {
1224 // calculate average bitrate of first segment
1225 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1229 os->bit_rate = bitrate;
1230 snprintf(os->bandwidth_str, sizeof(os->bandwidth_str),
1231 " bandwidth=\"%d\"", os->bit_rate);
1234 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length);
1235 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1237 os->pos += range_length;
1240 if (c->window_size || (final && c->remove_at_exit)) {
1241 for (i = 0; i < s->nb_streams; i++) {
1242 OutputStream *os = &c->streams[i];
1244 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1245 if (final && c->remove_at_exit)
1246 remove = os->nb_segments;
1248 for (j = 0; j < remove; j++) {
1249 char filename[1024];
1250 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1251 dashenc_delete_file(s, filename);
1252 av_free(os->segments[j]);
1254 os->nb_segments -= remove;
1255 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1261 ret = write_manifest(s, final);
1265 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1267 DASHContext *c = s->priv_data;
1268 AVStream *st = s->streams[pkt->stream_index];
1269 OutputStream *os = &c->streams[pkt->stream_index];
1272 ret = update_stream_extradata(s, os, st->codecpar);
1276 // Fill in a heuristic guess of the packet duration, if none is available.
1277 // The mp4 muxer will do something similar (for the last packet in a fragment)
1278 // if nothing is set (setting it for the other packets doesn't hurt).
1279 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1280 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1281 // so that we know the exact timestamps of fragments.
1282 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1283 pkt->duration = pkt->dts - os->last_dts;
1284 os->last_dts = pkt->dts;
1286 // If forcing the stream to start at 0, the mp4 muxer will set the start
1287 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1288 if (os->first_pts == AV_NOPTS_VALUE &&
1289 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1290 pkt->pts -= pkt->dts;
1294 if (os->first_pts == AV_NOPTS_VALUE)
1295 os->first_pts = pkt->pts;
1297 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1298 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1299 av_compare_ts(pkt->pts - os->start_pts, st->time_base,
1300 c->seg_duration, AV_TIME_BASE_Q) >= 0) {
1301 int64_t prev_duration = c->last_duration;
1303 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1306 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1310 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1311 if (c->last_duration < prev_duration*9/10 ||
1312 c->last_duration > prev_duration*11/10) {
1313 av_log(s, AV_LOG_WARNING,
1314 "Segment durations differ too much, enable use_timeline "
1315 "and use_template, or keep a stricter keyframe interval\n");
1319 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1323 if (!os->packets_written) {
1324 // If we wrote a previous segment, adjust the start time of the segment
1325 // to the end of the previous one (which is the same as the mp4 muxer
1326 // does). This avoids gaps in the timeline.
1327 if (os->max_pts != AV_NOPTS_VALUE)
1328 os->start_pts = os->max_pts;
1330 os->start_pts = pkt->pts;
1332 if (os->max_pts == AV_NOPTS_VALUE)
1333 os->max_pts = pkt->pts + pkt->duration;
1335 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1336 os->packets_written++;
1337 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1340 if (!os->init_range_length)
1341 flush_init_segment(s, os);
1343 //open the output context when the first frame of a segment is ready
1344 if (!c->single_file && os->packets_written == 1) {
1345 AVDictionary *opts = NULL;
1346 const char *proto = avio_find_protocol_name(s->url);
1347 int use_rename = proto && !strcmp(proto, "file");
1348 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1349 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1350 c->media_seg_name, pkt->stream_index,
1351 os->segment_index, os->bit_rate, os->start_pts);
1352 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1354 snprintf(os->temp_path, sizeof(os->temp_path),
1355 use_rename ? "%s.tmp" : "%s", os->full_path);
1356 set_http_options(&opts, c);
1357 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1360 av_dict_free(&opts);
1363 //write out the data immediately in streaming mode
1364 if (c->streaming && !strcmp(os->format_name, "mp4")) {
1366 uint8_t *buf = NULL;
1367 if (!os->written_len)
1368 write_styp(os->ctx->pb);
1369 avio_flush(os->ctx->pb);
1370 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1371 avio_write(os->out, buf + os->written_len, len - os->written_len);
1372 os->written_len = len;
1373 avio_flush(os->out);
1379 static int dash_write_trailer(AVFormatContext *s)
1381 DASHContext *c = s->priv_data;
1383 if (s->nb_streams > 0) {
1384 OutputStream *os = &c->streams[0];
1385 // If no segments have been written so far, try to do a crude
1386 // guess of the segment duration
1387 if (!c->last_duration)
1388 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1389 s->streams[0]->time_base,
1391 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1392 s->streams[0]->time_base,
1395 dash_flush(s, 1, -1);
1397 if (c->remove_at_exit) {
1398 char filename[1024];
1400 for (i = 0; i < s->nb_streams; i++) {
1401 OutputStream *os = &c->streams[i];
1402 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1403 dashenc_delete_file(s, filename);
1405 dashenc_delete_file(s, s->url);
1411 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1413 DASHContext *c = s->priv_data;
1414 OutputStream *os = &c->streams[avpkt->stream_index];
1415 AVFormatContext *oc = os->ctx;
1416 if (oc->oformat->check_bitstream) {
1418 AVPacket pkt = *avpkt;
1419 pkt.stream_index = 0;
1420 ret = oc->oformat->check_bitstream(oc, &pkt);
1422 AVStream *st = s->streams[avpkt->stream_index];
1423 AVStream *ost = oc->streams[0];
1424 st->internal->bsfcs = ost->internal->bsfcs;
1425 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1426 ost->internal->bsfcs = NULL;
1427 ost->internal->nb_bsfcs = 0;
1434 #define OFFSET(x) offsetof(DASHContext, x)
1435 #define E AV_OPT_FLAG_ENCODING_PARAM
1436 static const AVOption options[] = {
1437 { "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 },
1438 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1439 { "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 },
1440 #if FF_API_DASH_MIN_SEG_DURATION
1441 { "min_seg_duration", "minimum segment duration (in microseconds) (will be deprecated)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT, { .i64 = 5000000 }, 0, INT_MAX, E },
1443 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1444 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1445 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1446 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1447 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1448 { "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 },
1449 { "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 },
1450 { "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 },
1451 { "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 },
1452 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1453 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1454 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1455 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1456 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1457 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1461 static const AVClass dash_class = {
1462 .class_name = "dash muxer",
1463 .item_name = av_default_item_name,
1465 .version = LIBAVUTIL_VERSION_INT,
1468 AVOutputFormat ff_dash_muxer = {
1470 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1471 .extensions = "mpd",
1472 .priv_data_size = sizeof(DASHContext),
1473 .audio_codec = AV_CODEC_ID_AAC,
1474 .video_codec = AV_CODEC_ID_H264,
1475 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1477 .write_header = dash_write_header,
1478 .write_packet = dash_write_packet,
1479 .write_trailer = dash_write_trailer,
1480 .deinit = dash_free,
1481 .check_bitstream = dash_check_bitstream,
1482 .priv_class = &dash_class,