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;
87 double availability_time_offset;
92 typedef struct DASHContext {
93 const AVClass *class; /* Class for private options. */
94 char *adaptation_sets;
98 int extra_window_size;
99 #if FF_API_DASH_MIN_SEG_DURATION
100 int min_seg_duration;
102 int64_t seg_duration;
107 OutputStream *streams;
109 int64_t last_duration;
110 int64_t total_duration;
111 char availability_start_time[100];
113 const char *single_file_name;
114 const char *init_seg_name;
115 const char *media_seg_name;
116 const char *utc_timing_url;
118 const char *user_agent;
121 int master_playlist_created;
122 AVIOContext *mpd_out;
123 AVIOContext *m3u8_out;
128 static struct codec_string {
132 { AV_CODEC_ID_VP8, "vp8" },
133 { AV_CODEC_ID_VP9, "vp9" },
134 { AV_CODEC_ID_VORBIS, "vorbis" },
135 { AV_CODEC_ID_OPUS, "opus" },
139 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
140 AVDictionary **options) {
141 DASHContext *c = s->priv_data;
142 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
143 int err = AVERROR_MUXER_NOT_FOUND;
144 if (!*pb || !http_base_proto || !c->http_persistent) {
145 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
146 #if CONFIG_HTTP_PROTOCOL
148 URLContext *http_url_context = ffio_geturlcontext(*pb);
149 av_assert0(http_url_context);
150 err = ff_http_do_new_request(http_url_context, filename);
156 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
157 DASHContext *c = s->priv_data;
158 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
160 if (!http_base_proto || !c->http_persistent) {
161 ff_format_io_close(s, pb);
162 #if CONFIG_HTTP_PROTOCOL
164 URLContext *http_url_context = ffio_geturlcontext(*pb);
165 av_assert0(http_url_context);
167 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
172 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
175 const AVCodecTag *tags[2] = { NULL, NULL };
179 // common Webm codecs are not part of RFC 6381
180 for (i = 0; codecs[i].id; i++)
181 if (codecs[i].id == par->codec_id) {
182 av_strlcpy(str, codecs[i].str, size);
186 // for codecs part of RFC 6381
187 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
188 tags[0] = ff_codec_movvideo_tags;
189 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
190 tags[0] = ff_codec_movaudio_tags;
194 tag = av_codec_get_tag(tags, par->codec_id);
202 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
204 tags[0] = ff_mp4_obj_type;
205 oti = av_codec_get_tag(tags, par->codec_id);
207 av_strlcatf(str, size, ".%02"PRIx32, oti);
211 if (tag == MKTAG('m', 'p', '4', 'a')) {
212 if (par->extradata_size >= 2) {
213 int aot = par->extradata[0] >> 3;
215 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
216 av_strlcatf(str, size, ".%d", aot);
218 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
219 // Unimplemented, should output ProfileLevelIndication as a decimal number
220 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
222 } else if (!strcmp(str, "avc1")) {
223 uint8_t *tmpbuf = NULL;
224 uint8_t *extradata = par->extradata;
225 int extradata_size = par->extradata_size;
228 if (extradata[0] != 1) {
230 if (avio_open_dyn_buf(&pb) < 0)
232 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
233 ffio_free_dyn_buf(&pb);
236 extradata_size = avio_close_dyn_buf(pb, &extradata);
240 if (extradata_size >= 4)
241 av_strlcatf(str, size, ".%02x%02x%02x",
242 extradata[1], extradata[2], extradata[3]);
247 static int flush_dynbuf(OutputStream *os, int *range_length)
252 return AVERROR(EINVAL);
256 av_write_frame(os->ctx, NULL);
257 avio_flush(os->ctx->pb);
260 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
262 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
267 return avio_open_dyn_buf(&os->ctx->pb);
270 static void set_http_options(AVDictionary **options, DASHContext *c)
273 av_dict_set(options, "method", c->method, 0);
275 av_dict_set(options, "user_agent", c->user_agent, 0);
276 if (c->http_persistent)
277 av_dict_set_int(options, "multiple_requests", 1, 0);
279 av_dict_set_int(options, "timeout", c->timeout, 0);
282 static void get_hls_playlist_name(char *playlist_name, int string_size,
283 const char *base_url, int id) {
285 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
287 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
290 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
292 DASHContext *c = s->priv_data;
293 int ret, range_length;
295 ret = flush_dynbuf(os, &range_length);
299 os->pos = os->init_range_length = range_length;
301 ff_format_io_close(s, &os->out);
305 static void dash_free(AVFormatContext *s)
307 DASHContext *c = s->priv_data;
311 for (i = 0; i < c->nb_as; i++)
312 av_dict_free(&c->as[i].metadata);
319 for (i = 0; i < s->nb_streams; i++) {
320 OutputStream *os = &c->streams[i];
321 if (os->ctx && os->ctx_inited)
322 av_write_trailer(os->ctx);
323 if (os->ctx && os->ctx->pb)
324 ffio_free_dyn_buf(&os->ctx->pb);
325 ff_format_io_close(s, &os->out);
327 avformat_free_context(os->ctx);
328 for (j = 0; j < os->nb_segments; j++)
329 av_free(os->segments[j]);
330 av_free(os->segments);
332 av_freep(&c->streams);
334 ff_format_io_close(s, &c->mpd_out);
335 ff_format_io_close(s, &c->m3u8_out);
338 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
339 int representation_id, int final)
341 DASHContext *c = s->priv_data;
342 int i, start_index = 0, start_number = 1;
343 if (c->window_size) {
344 start_index = FFMAX(os->nb_segments - c->window_size, 0);
345 start_number = FFMAX(os->segment_index - c->window_size, 1);
348 if (c->use_template) {
349 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
350 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
351 if (!c->use_timeline) {
352 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
353 if (c->streaming && os->availability_time_offset)
354 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
355 os->availability_time_offset);
357 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
358 if (c->use_timeline) {
359 int64_t cur_time = 0;
360 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
361 for (i = start_index; i < os->nb_segments; ) {
362 Segment *seg = os->segments[i];
364 avio_printf(out, "\t\t\t\t\t\t<S ");
365 if (i == start_index || seg->time != cur_time) {
366 cur_time = seg->time;
367 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
369 avio_printf(out, "d=\"%d\" ", seg->duration);
370 while (i + repeat + 1 < os->nb_segments &&
371 os->segments[i + repeat + 1]->duration == seg->duration &&
372 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
375 avio_printf(out, "r=\"%d\" ", repeat);
376 avio_printf(out, "/>\n");
378 cur_time += (1 + repeat) * seg->duration;
380 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
382 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
383 } else if (c->single_file) {
384 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
385 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
386 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);
387 for (i = start_index; i < os->nb_segments; i++) {
388 Segment *seg = os->segments[i];
389 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
390 if (seg->index_length)
391 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
392 avio_printf(out, "/>\n");
394 avio_printf(out, "\t\t\t\t</SegmentList>\n");
396 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
397 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
398 for (i = start_index; i < os->nb_segments; i++) {
399 Segment *seg = os->segments[i];
400 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
402 avio_printf(out, "\t\t\t\t</SegmentList>\n");
404 if (c->hls_playlist && start_index < os->nb_segments)
406 int timescale = os->ctx->streams[0]->time_base.den;
407 char temp_filename_hls[1024];
408 char filename_hls[1024];
409 AVDictionary *http_opts = NULL;
410 int target_duration = 0;
412 const char *proto = avio_find_protocol_name(c->dirname);
413 int use_rename = proto && !strcmp(proto, "file");
415 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
416 c->dirname, representation_id);
418 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
420 set_http_options(&http_opts, c);
421 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
422 av_dict_free(&http_opts);
423 for (i = start_index; i < os->nb_segments; i++) {
424 Segment *seg = os->segments[i];
425 double duration = (double) seg->duration / timescale;
426 if (target_duration <= duration)
427 target_duration = lrint(duration);
430 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
431 start_number, PLAYLIST_TYPE_NONE);
433 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
434 os->init_range_length, os->init_start_pos);
436 for (i = start_index; i < os->nb_segments; i++) {
437 Segment *seg = os->segments[i];
438 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
439 (double) seg->duration / timescale, 0,
440 seg->range_length, seg->start_pos, NULL,
441 c->single_file ? os->initfile : seg->file,
444 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
449 ff_hls_write_end_list(c->m3u8_out);
451 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
454 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
455 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
461 static char *xmlescape(const char *str) {
462 int outlen = strlen(str)*3/2 + 6;
463 char *out = av_realloc(NULL, outlen + 1);
467 for (; *str; str++) {
468 if (pos + 6 > outlen) {
470 outlen = 2 * outlen + 6;
471 tmp = av_realloc(out, outlen + 1);
479 memcpy(&out[pos], "&", 5);
481 } else if (*str == '<') {
482 memcpy(&out[pos], "<", 4);
484 } else if (*str == '>') {
485 memcpy(&out[pos], ">", 4);
487 } else if (*str == '\'') {
488 memcpy(&out[pos], "'", 6);
490 } else if (*str == '\"') {
491 memcpy(&out[pos], """, 6);
501 static void write_time(AVIOContext *out, int64_t time)
503 int seconds = time / AV_TIME_BASE;
504 int fractions = time % AV_TIME_BASE;
505 int minutes = seconds / 60;
506 int hours = minutes / 60;
509 avio_printf(out, "PT");
511 avio_printf(out, "%dH", hours);
512 if (hours || minutes)
513 avio_printf(out, "%dM", minutes);
514 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
517 static void format_date_now(char *buf, int size)
519 time_t t = time(NULL);
520 struct tm *ptm, tmbuf;
521 ptm = gmtime_r(&t, &tmbuf);
523 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
528 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
531 DASHContext *c = s->priv_data;
532 AdaptationSet *as = &c->as[as_index];
533 AVDictionaryEntry *lang, *role;
536 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
537 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
538 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)
539 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
540 lang = av_dict_get(as->metadata, "language", NULL, 0);
542 avio_printf(out, " lang=\"%s\"", lang->value);
543 avio_printf(out, ">\n");
545 role = av_dict_get(as->metadata, "role", NULL, 0);
547 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
549 for (i = 0; i < s->nb_streams; i++) {
550 OutputStream *os = &c->streams[i];
551 char bandwidth_str[64] = {'\0'};
553 if (os->as_idx - 1 != as_index)
556 if (os->bit_rate > 0)
557 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
558 os->bit_rate + os->muxer_overhead);
560 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
561 AVStream *st = s->streams[i];
562 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
563 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
564 if (st->avg_frame_rate.num)
565 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
566 avio_printf(out, ">\n");
568 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
569 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
570 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
571 s->streams[i]->codecpar->channels);
573 output_segment_list(os, out, s, i, final);
574 avio_printf(out, "\t\t\t</Representation>\n");
576 avio_printf(out, "\t\t</AdaptationSet>\n");
581 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
583 DASHContext *c = s->priv_data;
585 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
587 return AVERROR(ENOMEM);
591 *as = &c->as[c->nb_as - 1];
592 memset(*as, 0, sizeof(**as));
593 (*as)->media_type = type;
598 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
600 DASHContext *c = s->priv_data;
601 AdaptationSet *as = &c->as[as_idx - 1];
602 OutputStream *os = &c->streams[i];
604 if (as->media_type != s->streams[i]->codecpar->codec_type) {
605 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
606 return AVERROR(EINVAL);
607 } else if (os->as_idx) {
608 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
609 return AVERROR(EINVAL);
616 static int parse_adaptation_sets(AVFormatContext *s)
618 DASHContext *c = s->priv_data;
619 const char *p = c->adaptation_sets;
620 enum { new_set, parse_id, parsing_streams } state;
624 // default: one AdaptationSet for each stream
626 for (i = 0; i < s->nb_streams; i++) {
627 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
629 snprintf(as->id, sizeof(as->id), "%d", i);
631 c->streams[i].as_idx = c->nb_as;
636 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
642 } else if (state == new_set && av_strstart(p, "id=", &p)) {
644 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
648 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
654 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
655 state = parsing_streams;
656 } else if (state == parsing_streams) {
657 AdaptationSet *as = &c->as[c->nb_as - 1];
658 char idx_str[8], *end_str;
660 n = strcspn(p, " ,");
661 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
664 // if value is "a" or "v", map all streams of that type
665 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
666 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
667 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
669 for (i = 0; i < s->nb_streams; i++) {
670 if (s->streams[i]->codecpar->codec_type != type)
673 as->media_type = s->streams[i]->codecpar->codec_type;
675 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
678 } else { // select single stream
679 i = strtol(idx_str, &end_str, 10);
680 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
681 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
682 return AVERROR(EINVAL);
684 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
686 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
687 as->media_type = s->streams[i]->codecpar->codec_type;
690 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
699 return AVERROR(EINVAL);
704 // check for unassigned streams
705 for (i = 0; i < s->nb_streams; i++) {
706 OutputStream *os = &c->streams[i];
708 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
709 return AVERROR(EINVAL);
715 static int write_manifest(AVFormatContext *s, int final)
717 DASHContext *c = s->priv_data;
719 char temp_filename[1024];
721 const char *proto = avio_find_protocol_name(s->url);
722 int use_rename = proto && !strcmp(proto, "file");
723 static unsigned int warned_non_file = 0;
724 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
725 AVDictionary *opts = NULL;
727 if (!use_rename && !warned_non_file++)
728 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
730 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
731 set_http_options(&opts, c);
732 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
734 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
739 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
740 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
741 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
742 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
743 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
744 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
745 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
747 avio_printf(out, "\tmediaPresentationDuration=\"");
748 write_time(out, c->total_duration);
749 avio_printf(out, "\"\n");
751 int64_t update_period = c->last_duration / AV_TIME_BASE;
753 if (c->use_template && !c->use_timeline)
755 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
756 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
757 if (c->availability_start_time[0])
758 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
759 format_date_now(now_str, sizeof(now_str));
761 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
762 if (c->window_size && c->use_template) {
763 avio_printf(out, "\ttimeShiftBufferDepth=\"");
764 write_time(out, c->last_duration * c->window_size);
765 avio_printf(out, "\"\n");
768 avio_printf(out, "\tminBufferTime=\"");
769 write_time(out, c->last_duration * 2);
770 avio_printf(out, "\">\n");
771 avio_printf(out, "\t<ProgramInformation>\n");
773 char *escaped = xmlescape(title->value);
774 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
777 avio_printf(out, "\t</ProgramInformation>\n");
779 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
780 OutputStream *os = &c->streams[0];
781 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
782 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
783 avio_printf(out, "\t<Period id=\"0\" start=\"");
784 write_time(out, start_time);
785 avio_printf(out, "\">\n");
787 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
790 for (i = 0; i < c->nb_as; i++) {
791 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
794 avio_printf(out, "\t</Period>\n");
796 if (c->utc_timing_url)
797 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
799 avio_printf(out, "</MPD>\n");
801 dashenc_io_close(s, &c->mpd_out, temp_filename);
804 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
808 if (c->hls_playlist && !c->master_playlist_created) {
809 char filename_hls[1024];
810 const char *audio_group = "A1";
812 int max_audio_bitrate = 0;
815 snprintf(filename_hls, sizeof(filename_hls), "%s/master.m3u8", c->dirname);
817 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
819 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
821 set_http_options(&opts, c);
822 ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, NULL, &opts);
824 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
829 ff_hls_write_playlist_version(out, 6);
831 for (i = 0; i < s->nb_streams; i++) {
832 char playlist_file[64];
833 AVStream *st = s->streams[i];
834 OutputStream *os = &c->streams[i];
835 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
837 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
838 ff_hls_write_audio_rendition(out, (char *)audio_group,
839 playlist_file, i, is_default);
840 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
841 os->muxer_overhead, max_audio_bitrate);
845 for (i = 0; i < s->nb_streams; i++) {
846 char playlist_file[64];
847 AVStream *st = s->streams[i];
848 OutputStream *os = &c->streams[i];
850 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
851 if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && max_audio_bitrate) {
852 agroup = (char *)audio_group;
853 stream_bitrate += max_audio_bitrate;
855 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
856 ff_hls_write_stream_info(st, out, stream_bitrate, playlist_file, agroup, NULL, NULL);
860 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
862 c->master_playlist_created = 1;
868 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
870 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
872 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
876 static int dash_init(AVFormatContext *s)
878 DASHContext *c = s->priv_data;
883 if (c->single_file_name)
888 #if FF_API_DASH_MIN_SEG_DURATION
889 if (c->min_seg_duration != 5000000) {
890 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
891 c->seg_duration = c->min_seg_duration;
895 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
896 ptr = strrchr(c->dirname, '/');
898 av_strlcpy(basename, &ptr[1], sizeof(basename));
901 c->dirname[0] = '\0';
902 av_strlcpy(basename, s->url, sizeof(basename));
905 ptr = strrchr(basename, '.');
909 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
911 return AVERROR(ENOMEM);
913 if ((ret = parse_adaptation_sets(s)) < 0)
916 for (i = 0; i < s->nb_streams; i++) {
917 OutputStream *os = &c->streams[i];
918 AdaptationSet *as = &c->as[os->as_idx - 1];
919 AVFormatContext *ctx;
921 AVDictionary *opts = NULL;
924 os->bit_rate = s->streams[i]->codecpar->bit_rate;
926 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
927 AV_LOG_ERROR : AV_LOG_WARNING;
928 av_log(s, level, "No bit rate set for stream %d\n", i);
929 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
930 return AVERROR(EINVAL);
933 // copy AdaptationSet language and role from stream metadata
934 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
935 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
937 ctx = avformat_alloc_context();
939 return AVERROR(ENOMEM);
941 // choose muxer based on codec: webm for VP8/9 and opus, mp4 otherwise
942 // note: os->format_name is also used as part of the mimetype of the
943 // representation, e.g. video/<format_name>
944 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP8 ||
945 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP9 ||
946 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
947 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VORBIS) {
948 snprintf(os->format_name, sizeof(os->format_name), "webm");
950 snprintf(os->format_name, sizeof(os->format_name), "mp4");
952 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
954 return AVERROR_MUXER_NOT_FOUND;
956 ctx->interrupt_callback = s->interrupt_callback;
957 ctx->opaque = s->opaque;
958 ctx->io_close = s->io_close;
959 ctx->io_open = s->io_open;
961 if (!(st = avformat_new_stream(ctx, NULL)))
962 return AVERROR(ENOMEM);
963 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
964 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
965 st->time_base = s->streams[i]->time_base;
966 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
967 ctx->avoid_negative_ts = s->avoid_negative_ts;
968 ctx->flags = s->flags;
970 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
973 if (c->single_file) {
974 if (c->single_file_name)
975 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
977 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
979 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
981 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
982 set_http_options(&opts, c);
983 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
987 os->init_start_pos = 0;
989 if (!strcmp(os->format_name, "mp4")) {
991 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
993 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
995 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
996 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
997 av_dict_set_int(&opts, "dash", 1, 0);
998 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
999 av_dict_set_int(&opts, "live", 1, 0);
1001 if ((ret = avformat_init_output(ctx, &opts)) < 0)
1004 avio_flush(ctx->pb);
1005 av_dict_free(&opts);
1007 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1009 // Flush init segment
1010 // except for mp4, since delay_moov is set and the init segment
1011 // is then flushed after the first packets
1012 if (strcmp(os->format_name, "mp4")) {
1013 flush_init_segment(s, os);
1016 s->streams[i]->time_base = st->time_base;
1017 // If the muxer wants to shift timestamps, request to have them shifted
1018 // already before being handed to this muxer, so we don't have mismatches
1019 // between the MPD and the actual segments.
1020 s->avoid_negative_ts = ctx->avoid_negative_ts;
1021 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1022 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1023 if (avg_frame_rate.num > 0) {
1024 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1025 as->min_frame_rate = avg_frame_rate;
1026 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1027 as->max_frame_rate = avg_frame_rate;
1029 as->ambiguous_frame_rate = 1;
1034 set_codec_str(s, st->codecpar, os->codec_str, sizeof(os->codec_str));
1035 os->first_pts = AV_NOPTS_VALUE;
1036 os->max_pts = AV_NOPTS_VALUE;
1037 os->last_dts = AV_NOPTS_VALUE;
1038 os->segment_index = 1;
1041 if (!c->has_video && c->seg_duration <= 0) {
1042 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1043 return AVERROR(EINVAL);
1048 static int dash_write_header(AVFormatContext *s)
1050 DASHContext *c = s->priv_data;
1052 for (i = 0; i < s->nb_streams; i++) {
1053 OutputStream *os = &c->streams[i];
1054 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1060 static int add_segment(OutputStream *os, const char *file,
1061 int64_t time, int duration,
1062 int64_t start_pos, int64_t range_length,
1063 int64_t index_length)
1067 if (os->nb_segments >= os->segments_size) {
1068 os->segments_size = (os->segments_size + 1) * 2;
1069 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1070 os->segments_size)) < 0) {
1071 os->segments_size = 0;
1072 os->nb_segments = 0;
1076 seg = av_mallocz(sizeof(*seg));
1078 return AVERROR(ENOMEM);
1079 av_strlcpy(seg->file, file, sizeof(seg->file));
1081 seg->duration = duration;
1082 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1083 seg->duration += seg->time;
1086 seg->start_pos = start_pos;
1087 seg->range_length = range_length;
1088 seg->index_length = index_length;
1089 os->segments[os->nb_segments++] = seg;
1090 os->segment_index++;
1094 static void write_styp(AVIOContext *pb)
1097 ffio_wfourcc(pb, "styp");
1098 ffio_wfourcc(pb, "msdh");
1099 avio_wb32(pb, 0); /* minor */
1100 ffio_wfourcc(pb, "msdh");
1101 ffio_wfourcc(pb, "msix");
1104 static void find_index_range(AVFormatContext *s, const char *full_path,
1105 int64_t pos, int *index_length)
1111 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1114 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1115 ff_format_io_close(s, &pb);
1118 ret = avio_read(pb, buf, 8);
1119 ff_format_io_close(s, &pb);
1122 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1124 *index_length = AV_RB32(&buf[0]);
1127 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1128 AVCodecParameters *par)
1132 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1135 extradata = av_malloc(par->extradata_size);
1138 return AVERROR(ENOMEM);
1140 memcpy(extradata, par->extradata, par->extradata_size);
1142 os->ctx->streams[0]->codecpar->extradata = extradata;
1143 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1145 set_codec_str(s, par, os->codec_str, sizeof(os->codec_str));
1150 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1151 DASHContext *c = s->priv_data;
1152 int http_base_proto = ff_is_http_proto(filename);
1154 if (http_base_proto) {
1155 AVIOContext *out = NULL;
1156 AVDictionary *http_opts = NULL;
1158 set_http_options(&http_opts, c);
1159 av_dict_set(&http_opts, "method", "DELETE", 0);
1161 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1162 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1165 av_dict_free(&http_opts);
1166 dashenc_io_close(s, &out, filename);
1167 } else if (unlink(filename) < 0) {
1168 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1172 static int dash_flush(AVFormatContext *s, int final, int stream)
1174 DASHContext *c = s->priv_data;
1177 const char *proto = avio_find_protocol_name(s->url);
1178 int use_rename = proto && !strcmp(proto, "file");
1180 int cur_flush_segment_index = 0;
1182 cur_flush_segment_index = c->streams[stream].segment_index;
1184 for (i = 0; i < s->nb_streams; i++) {
1185 OutputStream *os = &c->streams[i];
1186 AVStream *st = s->streams[i];
1187 int range_length, index_length = 0;
1189 if (!os->packets_written)
1192 // Flush the single stream that got a keyframe right now.
1193 // Flush all audio streams as well, in sync with video keyframes,
1194 // but not the other video streams.
1195 if (stream >= 0 && i != stream) {
1196 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1198 // Make sure we don't flush audio streams multiple times, when
1199 // all video streams are flushed one at a time.
1200 if (c->has_video && os->segment_index > cur_flush_segment_index)
1204 if (!c->single_file) {
1205 if (!strcmp(os->format_name, "mp4") && !os->written_len)
1206 write_styp(os->ctx->pb);
1208 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1211 ret = flush_dynbuf(os, &range_length);
1214 os->packets_written = 0;
1216 if (c->single_file) {
1217 find_index_range(s, os->full_path, os->pos, &index_length);
1219 dashenc_io_close(s, &os->out, os->temp_path);
1222 ret = avpriv_io_move(os->temp_path, os->full_path);
1228 if (!os->muxer_overhead)
1229 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1231 av_rescale_q(os->max_pts - os->start_pts,
1232 st->time_base, AV_TIME_BASE_Q);
1233 os->total_pkt_size = 0;
1235 if (!os->bit_rate) {
1236 // calculate average bitrate of first segment
1237 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1241 os->bit_rate = bitrate;
1243 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length);
1244 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1246 os->pos += range_length;
1249 if (c->window_size || (final && c->remove_at_exit)) {
1250 for (i = 0; i < s->nb_streams; i++) {
1251 OutputStream *os = &c->streams[i];
1253 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1254 if (final && c->remove_at_exit)
1255 remove = os->nb_segments;
1257 for (j = 0; j < remove; j++) {
1258 char filename[1024];
1259 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1260 dashenc_delete_file(s, filename);
1261 av_free(os->segments[j]);
1263 os->nb_segments -= remove;
1264 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1270 ret = write_manifest(s, final);
1274 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1276 DASHContext *c = s->priv_data;
1277 AVStream *st = s->streams[pkt->stream_index];
1278 OutputStream *os = &c->streams[pkt->stream_index];
1279 int64_t seg_end_duration, elapsed_duration;
1282 ret = update_stream_extradata(s, os, st->codecpar);
1286 // Fill in a heuristic guess of the packet duration, if none is available.
1287 // The mp4 muxer will do something similar (for the last packet in a fragment)
1288 // if nothing is set (setting it for the other packets doesn't hurt).
1289 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1290 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1291 // so that we know the exact timestamps of fragments.
1292 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1293 pkt->duration = pkt->dts - os->last_dts;
1294 os->last_dts = pkt->dts;
1296 // If forcing the stream to start at 0, the mp4 muxer will set the start
1297 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1298 if (os->first_pts == AV_NOPTS_VALUE &&
1299 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1300 pkt->pts -= pkt->dts;
1304 if (os->first_pts == AV_NOPTS_VALUE)
1305 os->first_pts = pkt->pts;
1307 if (!c->availability_start_time[0])
1308 format_date_now(c->availability_start_time,
1309 sizeof(c->availability_start_time));
1311 if (!os->availability_time_offset && pkt->duration) {
1312 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1314 os->availability_time_offset = ((double) c->seg_duration -
1315 frame_duration) / AV_TIME_BASE;
1318 if (c->use_template && !c->use_timeline) {
1319 elapsed_duration = pkt->pts - os->first_pts;
1320 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1322 elapsed_duration = pkt->pts - os->start_pts;
1323 seg_end_duration = c->seg_duration;
1326 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1327 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1328 av_compare_ts(elapsed_duration, st->time_base,
1329 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1330 int64_t prev_duration = c->last_duration;
1332 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1335 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1339 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1340 if (c->last_duration < prev_duration*9/10 ||
1341 c->last_duration > prev_duration*11/10) {
1342 av_log(s, AV_LOG_WARNING,
1343 "Segment durations differ too much, enable use_timeline "
1344 "and use_template, or keep a stricter keyframe interval\n");
1348 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1352 if (!os->packets_written) {
1353 // If we wrote a previous segment, adjust the start time of the segment
1354 // to the end of the previous one (which is the same as the mp4 muxer
1355 // does). This avoids gaps in the timeline.
1356 if (os->max_pts != AV_NOPTS_VALUE)
1357 os->start_pts = os->max_pts;
1359 os->start_pts = pkt->pts;
1361 if (os->max_pts == AV_NOPTS_VALUE)
1362 os->max_pts = pkt->pts + pkt->duration;
1364 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1365 os->packets_written++;
1366 os->total_pkt_size += pkt->size;
1367 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1370 if (!os->init_range_length)
1371 flush_init_segment(s, os);
1373 //open the output context when the first frame of a segment is ready
1374 if (!c->single_file && os->packets_written == 1) {
1375 AVDictionary *opts = NULL;
1376 const char *proto = avio_find_protocol_name(s->url);
1377 int use_rename = proto && !strcmp(proto, "file");
1378 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1379 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1380 c->media_seg_name, pkt->stream_index,
1381 os->segment_index, os->bit_rate, os->start_pts);
1382 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1384 snprintf(os->temp_path, sizeof(os->temp_path),
1385 use_rename ? "%s.tmp" : "%s", os->full_path);
1386 set_http_options(&opts, c);
1387 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1390 av_dict_free(&opts);
1393 //write out the data immediately in streaming mode
1394 if (c->streaming && !strcmp(os->format_name, "mp4")) {
1396 uint8_t *buf = NULL;
1397 if (!os->written_len)
1398 write_styp(os->ctx->pb);
1399 avio_flush(os->ctx->pb);
1400 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1401 avio_write(os->out, buf + os->written_len, len - os->written_len);
1402 os->written_len = len;
1403 avio_flush(os->out);
1409 static int dash_write_trailer(AVFormatContext *s)
1411 DASHContext *c = s->priv_data;
1413 if (s->nb_streams > 0) {
1414 OutputStream *os = &c->streams[0];
1415 // If no segments have been written so far, try to do a crude
1416 // guess of the segment duration
1417 if (!c->last_duration)
1418 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1419 s->streams[0]->time_base,
1421 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1422 s->streams[0]->time_base,
1425 dash_flush(s, 1, -1);
1427 if (c->remove_at_exit) {
1428 char filename[1024];
1430 for (i = 0; i < s->nb_streams; i++) {
1431 OutputStream *os = &c->streams[i];
1432 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1433 dashenc_delete_file(s, filename);
1435 dashenc_delete_file(s, s->url);
1441 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1443 DASHContext *c = s->priv_data;
1444 OutputStream *os = &c->streams[avpkt->stream_index];
1445 AVFormatContext *oc = os->ctx;
1446 if (oc->oformat->check_bitstream) {
1448 AVPacket pkt = *avpkt;
1449 pkt.stream_index = 0;
1450 ret = oc->oformat->check_bitstream(oc, &pkt);
1452 AVStream *st = s->streams[avpkt->stream_index];
1453 AVStream *ost = oc->streams[0];
1454 st->internal->bsfcs = ost->internal->bsfcs;
1455 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1456 ost->internal->bsfcs = NULL;
1457 ost->internal->nb_bsfcs = 0;
1464 #define OFFSET(x) offsetof(DASHContext, x)
1465 #define E AV_OPT_FLAG_ENCODING_PARAM
1466 static const AVOption options[] = {
1467 { "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 },
1468 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1469 { "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 },
1470 #if FF_API_DASH_MIN_SEG_DURATION
1471 { "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 },
1473 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1474 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1475 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1476 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1477 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1478 { "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 },
1479 { "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 },
1480 { "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 },
1481 { "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 },
1482 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1483 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1484 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1485 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1486 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1487 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1491 static const AVClass dash_class = {
1492 .class_name = "dash muxer",
1493 .item_name = av_default_item_name,
1495 .version = LIBAVUTIL_VERSION_INT,
1498 AVOutputFormat ff_dash_muxer = {
1500 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1501 .extensions = "mpd",
1502 .priv_data_size = sizeof(DASHContext),
1503 .audio_codec = AV_CODEC_ID_AAC,
1504 .video_codec = AV_CODEC_ID_H264,
1505 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1507 .write_header = dash_write_header,
1508 .write_packet = dash_write_packet,
1509 .write_trailer = dash_write_trailer,
1510 .deinit = dash_free,
1511 .check_bitstream = dash_check_bitstream,
1512 .priv_class = &dash_class,