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;
79 int64_t last_dts, last_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;
126 int index_correction;
129 static struct codec_string {
133 { AV_CODEC_ID_VP8, "vp8" },
134 { AV_CODEC_ID_VP9, "vp9" },
135 { AV_CODEC_ID_VORBIS, "vorbis" },
136 { AV_CODEC_ID_OPUS, "opus" },
140 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
141 AVDictionary **options) {
142 DASHContext *c = s->priv_data;
143 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
144 int err = AVERROR_MUXER_NOT_FOUND;
145 if (!*pb || !http_base_proto || !c->http_persistent) {
146 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
147 #if CONFIG_HTTP_PROTOCOL
149 URLContext *http_url_context = ffio_geturlcontext(*pb);
150 av_assert0(http_url_context);
151 err = ff_http_do_new_request(http_url_context, filename);
157 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
158 DASHContext *c = s->priv_data;
159 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
161 if (!http_base_proto || !c->http_persistent) {
162 ff_format_io_close(s, pb);
163 #if CONFIG_HTTP_PROTOCOL
165 URLContext *http_url_context = ffio_geturlcontext(*pb);
166 av_assert0(http_url_context);
168 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
173 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
176 const AVCodecTag *tags[2] = { NULL, NULL };
180 // common Webm codecs are not part of RFC 6381
181 for (i = 0; codecs[i].id; i++)
182 if (codecs[i].id == par->codec_id) {
183 av_strlcpy(str, codecs[i].str, size);
187 // for codecs part of RFC 6381
188 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
189 tags[0] = ff_codec_movvideo_tags;
190 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
191 tags[0] = ff_codec_movaudio_tags;
195 tag = av_codec_get_tag(tags, par->codec_id);
203 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
205 tags[0] = ff_mp4_obj_type;
206 oti = av_codec_get_tag(tags, par->codec_id);
208 av_strlcatf(str, size, ".%02"PRIx32, oti);
212 if (tag == MKTAG('m', 'p', '4', 'a')) {
213 if (par->extradata_size >= 2) {
214 int aot = par->extradata[0] >> 3;
216 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
217 av_strlcatf(str, size, ".%d", aot);
219 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
220 // Unimplemented, should output ProfileLevelIndication as a decimal number
221 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
223 } else if (!strcmp(str, "avc1")) {
224 uint8_t *tmpbuf = NULL;
225 uint8_t *extradata = par->extradata;
226 int extradata_size = par->extradata_size;
229 if (extradata[0] != 1) {
231 if (avio_open_dyn_buf(&pb) < 0)
233 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
234 ffio_free_dyn_buf(&pb);
237 extradata_size = avio_close_dyn_buf(pb, &extradata);
241 if (extradata_size >= 4)
242 av_strlcatf(str, size, ".%02x%02x%02x",
243 extradata[1], extradata[2], extradata[3]);
248 static int flush_dynbuf(OutputStream *os, int *range_length)
253 return AVERROR(EINVAL);
257 av_write_frame(os->ctx, NULL);
258 avio_flush(os->ctx->pb);
261 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
263 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
268 return avio_open_dyn_buf(&os->ctx->pb);
271 static void set_http_options(AVDictionary **options, DASHContext *c)
274 av_dict_set(options, "method", c->method, 0);
276 av_dict_set(options, "user_agent", c->user_agent, 0);
277 if (c->http_persistent)
278 av_dict_set_int(options, "multiple_requests", 1, 0);
280 av_dict_set_int(options, "timeout", c->timeout, 0);
283 static void get_hls_playlist_name(char *playlist_name, int string_size,
284 const char *base_url, int id) {
286 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
288 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
291 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
293 DASHContext *c = s->priv_data;
294 int ret, range_length;
296 ret = flush_dynbuf(os, &range_length);
300 os->pos = os->init_range_length = range_length;
302 ff_format_io_close(s, &os->out);
306 static void dash_free(AVFormatContext *s)
308 DASHContext *c = s->priv_data;
312 for (i = 0; i < c->nb_as; i++)
313 av_dict_free(&c->as[i].metadata);
320 for (i = 0; i < s->nb_streams; i++) {
321 OutputStream *os = &c->streams[i];
322 if (os->ctx && os->ctx_inited)
323 av_write_trailer(os->ctx);
324 if (os->ctx && os->ctx->pb)
325 ffio_free_dyn_buf(&os->ctx->pb);
326 ff_format_io_close(s, &os->out);
328 avformat_free_context(os->ctx);
329 for (j = 0; j < os->nb_segments; j++)
330 av_free(os->segments[j]);
331 av_free(os->segments);
333 av_freep(&c->streams);
335 ff_format_io_close(s, &c->mpd_out);
336 ff_format_io_close(s, &c->m3u8_out);
339 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
340 int representation_id, int final)
342 DASHContext *c = s->priv_data;
343 int i, start_index = 0, start_number = 1;
344 if (c->window_size) {
345 start_index = FFMAX(os->nb_segments - c->window_size, 0);
346 start_number = FFMAX(os->segment_index - c->window_size, 1);
349 if (c->use_template) {
350 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
351 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
352 if (!c->use_timeline) {
353 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
354 if (c->streaming && os->availability_time_offset)
355 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
356 os->availability_time_offset);
358 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
359 if (c->use_timeline) {
360 int64_t cur_time = 0;
361 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
362 for (i = start_index; i < os->nb_segments; ) {
363 Segment *seg = os->segments[i];
365 avio_printf(out, "\t\t\t\t\t\t<S ");
366 if (i == start_index || seg->time != cur_time) {
367 cur_time = seg->time;
368 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
370 avio_printf(out, "d=\"%d\" ", seg->duration);
371 while (i + repeat + 1 < os->nb_segments &&
372 os->segments[i + repeat + 1]->duration == seg->duration &&
373 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
376 avio_printf(out, "r=\"%d\" ", repeat);
377 avio_printf(out, "/>\n");
379 cur_time += (1 + repeat) * seg->duration;
381 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
383 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
384 } else if (c->single_file) {
385 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
386 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
387 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);
388 for (i = start_index; i < os->nb_segments; i++) {
389 Segment *seg = os->segments[i];
390 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
391 if (seg->index_length)
392 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
393 avio_printf(out, "/>\n");
395 avio_printf(out, "\t\t\t\t</SegmentList>\n");
397 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
398 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
399 for (i = start_index; i < os->nb_segments; i++) {
400 Segment *seg = os->segments[i];
401 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
403 avio_printf(out, "\t\t\t\t</SegmentList>\n");
405 if (c->hls_playlist && start_index < os->nb_segments)
407 int timescale = os->ctx->streams[0]->time_base.den;
408 char temp_filename_hls[1024];
409 char filename_hls[1024];
410 AVDictionary *http_opts = NULL;
411 int target_duration = 0;
413 const char *proto = avio_find_protocol_name(c->dirname);
414 int use_rename = proto && !strcmp(proto, "file");
416 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
417 c->dirname, representation_id);
419 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
421 set_http_options(&http_opts, c);
422 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
423 av_dict_free(&http_opts);
424 for (i = start_index; i < os->nb_segments; i++) {
425 Segment *seg = os->segments[i];
426 double duration = (double) seg->duration / timescale;
427 if (target_duration <= duration)
428 target_duration = lrint(duration);
431 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
432 start_number, PLAYLIST_TYPE_NONE);
434 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
435 os->init_range_length, os->init_start_pos);
437 for (i = start_index; i < os->nb_segments; i++) {
438 Segment *seg = os->segments[i];
439 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
440 (double) seg->duration / timescale, 0,
441 seg->range_length, seg->start_pos, NULL,
442 c->single_file ? os->initfile : seg->file,
445 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
450 ff_hls_write_end_list(c->m3u8_out);
452 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
455 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
456 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
462 static char *xmlescape(const char *str) {
463 int outlen = strlen(str)*3/2 + 6;
464 char *out = av_realloc(NULL, outlen + 1);
468 for (; *str; str++) {
469 if (pos + 6 > outlen) {
471 outlen = 2 * outlen + 6;
472 tmp = av_realloc(out, outlen + 1);
480 memcpy(&out[pos], "&", 5);
482 } else if (*str == '<') {
483 memcpy(&out[pos], "<", 4);
485 } else if (*str == '>') {
486 memcpy(&out[pos], ">", 4);
488 } else if (*str == '\'') {
489 memcpy(&out[pos], "'", 6);
491 } else if (*str == '\"') {
492 memcpy(&out[pos], """, 6);
502 static void write_time(AVIOContext *out, int64_t time)
504 int seconds = time / AV_TIME_BASE;
505 int fractions = time % AV_TIME_BASE;
506 int minutes = seconds / 60;
507 int hours = minutes / 60;
510 avio_printf(out, "PT");
512 avio_printf(out, "%dH", hours);
513 if (hours || minutes)
514 avio_printf(out, "%dM", minutes);
515 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
518 static void format_date_now(char *buf, int size)
520 time_t t = time(NULL);
521 struct tm *ptm, tmbuf;
522 ptm = gmtime_r(&t, &tmbuf);
524 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
529 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
532 DASHContext *c = s->priv_data;
533 AdaptationSet *as = &c->as[as_index];
534 AVDictionaryEntry *lang, *role;
537 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
538 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
539 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)
540 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
541 lang = av_dict_get(as->metadata, "language", NULL, 0);
543 avio_printf(out, " lang=\"%s\"", lang->value);
544 avio_printf(out, ">\n");
546 role = av_dict_get(as->metadata, "role", NULL, 0);
548 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
550 for (i = 0; i < s->nb_streams; i++) {
551 OutputStream *os = &c->streams[i];
552 char bandwidth_str[64] = {'\0'};
554 if (os->as_idx - 1 != as_index)
557 if (os->bit_rate > 0)
558 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
559 os->bit_rate + os->muxer_overhead);
561 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
562 AVStream *st = s->streams[i];
563 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
564 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
565 if (st->avg_frame_rate.num)
566 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
567 avio_printf(out, ">\n");
569 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
570 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
571 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
572 s->streams[i]->codecpar->channels);
574 output_segment_list(os, out, s, i, final);
575 avio_printf(out, "\t\t\t</Representation>\n");
577 avio_printf(out, "\t\t</AdaptationSet>\n");
582 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
584 DASHContext *c = s->priv_data;
586 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
588 return AVERROR(ENOMEM);
592 *as = &c->as[c->nb_as - 1];
593 memset(*as, 0, sizeof(**as));
594 (*as)->media_type = type;
599 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
601 DASHContext *c = s->priv_data;
602 AdaptationSet *as = &c->as[as_idx - 1];
603 OutputStream *os = &c->streams[i];
605 if (as->media_type != s->streams[i]->codecpar->codec_type) {
606 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
607 return AVERROR(EINVAL);
608 } else if (os->as_idx) {
609 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
610 return AVERROR(EINVAL);
617 static int parse_adaptation_sets(AVFormatContext *s)
619 DASHContext *c = s->priv_data;
620 const char *p = c->adaptation_sets;
621 enum { new_set, parse_id, parsing_streams } state;
625 // default: one AdaptationSet for each stream
627 for (i = 0; i < s->nb_streams; i++) {
628 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
630 snprintf(as->id, sizeof(as->id), "%d", i);
632 c->streams[i].as_idx = c->nb_as;
637 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
643 } else if (state == new_set && av_strstart(p, "id=", &p)) {
645 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
649 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
655 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
656 state = parsing_streams;
657 } else if (state == parsing_streams) {
658 AdaptationSet *as = &c->as[c->nb_as - 1];
659 char idx_str[8], *end_str;
661 n = strcspn(p, " ,");
662 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
665 // if value is "a" or "v", map all streams of that type
666 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
667 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
668 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
670 for (i = 0; i < s->nb_streams; i++) {
671 if (s->streams[i]->codecpar->codec_type != type)
674 as->media_type = s->streams[i]->codecpar->codec_type;
676 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
679 } else { // select single stream
680 i = strtol(idx_str, &end_str, 10);
681 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
682 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
683 return AVERROR(EINVAL);
685 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
687 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
688 as->media_type = s->streams[i]->codecpar->codec_type;
691 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
700 return AVERROR(EINVAL);
705 // check for unassigned streams
706 for (i = 0; i < s->nb_streams; i++) {
707 OutputStream *os = &c->streams[i];
709 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
710 return AVERROR(EINVAL);
716 static int write_manifest(AVFormatContext *s, int final)
718 DASHContext *c = s->priv_data;
720 char temp_filename[1024];
722 const char *proto = avio_find_protocol_name(s->url);
723 int use_rename = proto && !strcmp(proto, "file");
724 static unsigned int warned_non_file = 0;
725 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
726 AVDictionary *opts = NULL;
728 if (!use_rename && !warned_non_file++)
729 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
731 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
732 set_http_options(&opts, c);
733 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
735 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
740 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
741 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
742 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
743 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
744 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
745 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
746 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
748 avio_printf(out, "\tmediaPresentationDuration=\"");
749 write_time(out, c->total_duration);
750 avio_printf(out, "\"\n");
752 int64_t update_period = c->last_duration / AV_TIME_BASE;
754 if (c->use_template && !c->use_timeline)
756 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
757 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
758 if (c->availability_start_time[0])
759 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
760 format_date_now(now_str, sizeof(now_str));
762 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
763 if (c->window_size && c->use_template) {
764 avio_printf(out, "\ttimeShiftBufferDepth=\"");
765 write_time(out, c->last_duration * c->window_size);
766 avio_printf(out, "\"\n");
769 avio_printf(out, "\tminBufferTime=\"");
770 write_time(out, c->last_duration * 2);
771 avio_printf(out, "\">\n");
772 avio_printf(out, "\t<ProgramInformation>\n");
774 char *escaped = xmlescape(title->value);
775 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
778 avio_printf(out, "\t</ProgramInformation>\n");
780 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
781 OutputStream *os = &c->streams[0];
782 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
783 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
784 avio_printf(out, "\t<Period id=\"0\" start=\"");
785 write_time(out, start_time);
786 avio_printf(out, "\">\n");
788 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
791 for (i = 0; i < c->nb_as; i++) {
792 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
795 avio_printf(out, "\t</Period>\n");
797 if (c->utc_timing_url)
798 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
800 avio_printf(out, "</MPD>\n");
802 dashenc_io_close(s, &c->mpd_out, temp_filename);
805 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
809 if (c->hls_playlist && !c->master_playlist_created) {
810 char filename_hls[1024];
811 const char *audio_group = "A1";
813 int max_audio_bitrate = 0;
816 snprintf(filename_hls, sizeof(filename_hls), "%s/master.m3u8", c->dirname);
818 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
820 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
822 set_http_options(&opts, c);
823 ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, NULL, &opts);
825 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
830 ff_hls_write_playlist_version(out, 6);
832 for (i = 0; i < s->nb_streams; i++) {
833 char playlist_file[64];
834 AVStream *st = s->streams[i];
835 OutputStream *os = &c->streams[i];
836 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
838 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
839 ff_hls_write_audio_rendition(out, (char *)audio_group,
840 playlist_file, i, is_default);
841 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
842 os->muxer_overhead, max_audio_bitrate);
846 for (i = 0; i < s->nb_streams; i++) {
847 char playlist_file[64];
848 AVStream *st = s->streams[i];
849 OutputStream *os = &c->streams[i];
851 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
852 if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && max_audio_bitrate) {
853 agroup = (char *)audio_group;
854 stream_bitrate += max_audio_bitrate;
856 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
857 ff_hls_write_stream_info(st, out, stream_bitrate, playlist_file, agroup, NULL, NULL);
861 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
863 c->master_playlist_created = 1;
869 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
871 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
873 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
877 static int dash_init(AVFormatContext *s)
879 DASHContext *c = s->priv_data;
884 if (c->single_file_name)
889 #if FF_API_DASH_MIN_SEG_DURATION
890 if (c->min_seg_duration != 5000000) {
891 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
892 c->seg_duration = c->min_seg_duration;
896 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
897 ptr = strrchr(c->dirname, '/');
899 av_strlcpy(basename, &ptr[1], sizeof(basename));
902 c->dirname[0] = '\0';
903 av_strlcpy(basename, s->url, sizeof(basename));
906 ptr = strrchr(basename, '.');
910 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
912 return AVERROR(ENOMEM);
914 if ((ret = parse_adaptation_sets(s)) < 0)
917 for (i = 0; i < s->nb_streams; i++) {
918 OutputStream *os = &c->streams[i];
919 AdaptationSet *as = &c->as[os->as_idx - 1];
920 AVFormatContext *ctx;
922 AVDictionary *opts = NULL;
925 os->bit_rate = s->streams[i]->codecpar->bit_rate;
927 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
928 AV_LOG_ERROR : AV_LOG_WARNING;
929 av_log(s, level, "No bit rate set for stream %d\n", i);
930 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
931 return AVERROR(EINVAL);
934 // copy AdaptationSet language and role from stream metadata
935 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
936 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
938 ctx = avformat_alloc_context();
940 return AVERROR(ENOMEM);
942 // choose muxer based on codec: webm for VP8/9 and opus, mp4 otherwise
943 // note: os->format_name is also used as part of the mimetype of the
944 // representation, e.g. video/<format_name>
945 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP8 ||
946 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP9 ||
947 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
948 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VORBIS) {
949 snprintf(os->format_name, sizeof(os->format_name), "webm");
951 snprintf(os->format_name, sizeof(os->format_name), "mp4");
953 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
955 return AVERROR_MUXER_NOT_FOUND;
957 ctx->interrupt_callback = s->interrupt_callback;
958 ctx->opaque = s->opaque;
959 ctx->io_close = s->io_close;
960 ctx->io_open = s->io_open;
962 if (!(st = avformat_new_stream(ctx, NULL)))
963 return AVERROR(ENOMEM);
964 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
965 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
966 st->time_base = s->streams[i]->time_base;
967 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
968 ctx->avoid_negative_ts = s->avoid_negative_ts;
969 ctx->flags = s->flags;
971 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
974 if (c->single_file) {
975 if (c->single_file_name)
976 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
978 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
980 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
982 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
983 set_http_options(&opts, c);
984 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
988 os->init_start_pos = 0;
990 if (!strcmp(os->format_name, "mp4")) {
992 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
994 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
996 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
997 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
998 av_dict_set_int(&opts, "dash", 1, 0);
999 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1000 av_dict_set_int(&opts, "live", 1, 0);
1002 if ((ret = avformat_init_output(ctx, &opts)) < 0)
1005 avio_flush(ctx->pb);
1006 av_dict_free(&opts);
1008 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1010 // Flush init segment
1011 // except for mp4, since delay_moov is set and the init segment
1012 // is then flushed after the first packets
1013 if (strcmp(os->format_name, "mp4")) {
1014 flush_init_segment(s, os);
1017 s->streams[i]->time_base = st->time_base;
1018 // If the muxer wants to shift timestamps, request to have them shifted
1019 // already before being handed to this muxer, so we don't have mismatches
1020 // between the MPD and the actual segments.
1021 s->avoid_negative_ts = ctx->avoid_negative_ts;
1022 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1023 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1024 if (avg_frame_rate.num > 0) {
1025 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1026 as->min_frame_rate = avg_frame_rate;
1027 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1028 as->max_frame_rate = avg_frame_rate;
1030 as->ambiguous_frame_rate = 1;
1035 set_codec_str(s, st->codecpar, os->codec_str, sizeof(os->codec_str));
1036 os->first_pts = AV_NOPTS_VALUE;
1037 os->max_pts = AV_NOPTS_VALUE;
1038 os->last_dts = AV_NOPTS_VALUE;
1039 os->segment_index = 1;
1042 if (!c->has_video && c->seg_duration <= 0) {
1043 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1044 return AVERROR(EINVAL);
1049 static int dash_write_header(AVFormatContext *s)
1051 DASHContext *c = s->priv_data;
1053 for (i = 0; i < s->nb_streams; i++) {
1054 OutputStream *os = &c->streams[i];
1055 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1061 static int add_segment(OutputStream *os, const char *file,
1062 int64_t time, int duration,
1063 int64_t start_pos, int64_t range_length,
1064 int64_t index_length, int next_exp_index)
1068 if (os->nb_segments >= os->segments_size) {
1069 os->segments_size = (os->segments_size + 1) * 2;
1070 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1071 os->segments_size)) < 0) {
1072 os->segments_size = 0;
1073 os->nb_segments = 0;
1077 seg = av_mallocz(sizeof(*seg));
1079 return AVERROR(ENOMEM);
1080 av_strlcpy(seg->file, file, sizeof(seg->file));
1082 seg->duration = duration;
1083 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1084 seg->duration += seg->time;
1087 seg->start_pos = start_pos;
1088 seg->range_length = range_length;
1089 seg->index_length = index_length;
1090 os->segments[os->nb_segments++] = seg;
1091 os->segment_index++;
1092 //correcting the segment index if it has fallen behind the expected value
1093 if (os->segment_index < next_exp_index) {
1094 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1095 file, os->segment_index, next_exp_index);
1096 os->segment_index = next_exp_index;
1101 static void write_styp(AVIOContext *pb)
1104 ffio_wfourcc(pb, "styp");
1105 ffio_wfourcc(pb, "msdh");
1106 avio_wb32(pb, 0); /* minor */
1107 ffio_wfourcc(pb, "msdh");
1108 ffio_wfourcc(pb, "msix");
1111 static void find_index_range(AVFormatContext *s, const char *full_path,
1112 int64_t pos, int *index_length)
1118 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1121 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1122 ff_format_io_close(s, &pb);
1125 ret = avio_read(pb, buf, 8);
1126 ff_format_io_close(s, &pb);
1129 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1131 *index_length = AV_RB32(&buf[0]);
1134 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1135 AVCodecParameters *par)
1139 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1142 extradata = av_malloc(par->extradata_size);
1145 return AVERROR(ENOMEM);
1147 memcpy(extradata, par->extradata, par->extradata_size);
1149 os->ctx->streams[0]->codecpar->extradata = extradata;
1150 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1152 set_codec_str(s, par, os->codec_str, sizeof(os->codec_str));
1157 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1158 DASHContext *c = s->priv_data;
1159 int http_base_proto = ff_is_http_proto(filename);
1161 if (http_base_proto) {
1162 AVIOContext *out = NULL;
1163 AVDictionary *http_opts = NULL;
1165 set_http_options(&http_opts, c);
1166 av_dict_set(&http_opts, "method", "DELETE", 0);
1168 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1169 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1172 av_dict_free(&http_opts);
1173 dashenc_io_close(s, &out, filename);
1174 } else if (unlink(filename) < 0) {
1175 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1179 static int dash_flush(AVFormatContext *s, int final, int stream)
1181 DASHContext *c = s->priv_data;
1184 const char *proto = avio_find_protocol_name(s->url);
1185 int use_rename = proto && !strcmp(proto, "file");
1187 int cur_flush_segment_index = 0, next_exp_index = -1;
1189 cur_flush_segment_index = c->streams[stream].segment_index;
1191 //finding the next segment's expected index, based on the current pts value
1192 if (c->use_template && !c->use_timeline && c->index_correction &&
1193 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1194 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1195 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1196 c->streams[stream].first_pts,
1197 s->streams[stream]->time_base,
1199 next_exp_index = (pts_diff / c->seg_duration) + 1;
1203 for (i = 0; i < s->nb_streams; i++) {
1204 OutputStream *os = &c->streams[i];
1205 AVStream *st = s->streams[i];
1206 int range_length, index_length = 0;
1208 if (!os->packets_written)
1211 // Flush the single stream that got a keyframe right now.
1212 // Flush all audio streams as well, in sync with video keyframes,
1213 // but not the other video streams.
1214 if (stream >= 0 && i != stream) {
1215 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1217 // Make sure we don't flush audio streams multiple times, when
1218 // all video streams are flushed one at a time.
1219 if (c->has_video && os->segment_index > cur_flush_segment_index)
1223 if (!c->single_file) {
1224 if (!strcmp(os->format_name, "mp4") && !os->written_len)
1225 write_styp(os->ctx->pb);
1227 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1230 ret = flush_dynbuf(os, &range_length);
1233 os->packets_written = 0;
1235 if (c->single_file) {
1236 find_index_range(s, os->full_path, os->pos, &index_length);
1238 dashenc_io_close(s, &os->out, os->temp_path);
1241 ret = avpriv_io_move(os->temp_path, os->full_path);
1247 if (!os->muxer_overhead)
1248 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1250 av_rescale_q(os->max_pts - os->start_pts,
1251 st->time_base, AV_TIME_BASE_Q);
1252 os->total_pkt_size = 0;
1254 if (!os->bit_rate) {
1255 // calculate average bitrate of first segment
1256 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1260 os->bit_rate = bitrate;
1262 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1263 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1265 os->pos += range_length;
1268 if (c->window_size || (final && c->remove_at_exit)) {
1269 for (i = 0; i < s->nb_streams; i++) {
1270 OutputStream *os = &c->streams[i];
1272 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1273 if (final && c->remove_at_exit)
1274 remove = os->nb_segments;
1276 for (j = 0; j < remove; j++) {
1277 char filename[1024];
1278 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1279 dashenc_delete_file(s, filename);
1280 av_free(os->segments[j]);
1282 os->nb_segments -= remove;
1283 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1289 ret = write_manifest(s, final);
1293 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1295 DASHContext *c = s->priv_data;
1296 AVStream *st = s->streams[pkt->stream_index];
1297 OutputStream *os = &c->streams[pkt->stream_index];
1298 int64_t seg_end_duration, elapsed_duration;
1301 ret = update_stream_extradata(s, os, st->codecpar);
1305 // Fill in a heuristic guess of the packet duration, if none is available.
1306 // The mp4 muxer will do something similar (for the last packet in a fragment)
1307 // if nothing is set (setting it for the other packets doesn't hurt).
1308 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1309 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1310 // so that we know the exact timestamps of fragments.
1311 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1312 pkt->duration = pkt->dts - os->last_dts;
1313 os->last_dts = pkt->dts;
1315 // If forcing the stream to start at 0, the mp4 muxer will set the start
1316 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1317 if (os->first_pts == AV_NOPTS_VALUE &&
1318 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1319 pkt->pts -= pkt->dts;
1323 if (os->first_pts == AV_NOPTS_VALUE)
1324 os->first_pts = pkt->pts;
1325 os->last_pts = pkt->pts;
1327 if (!c->availability_start_time[0])
1328 format_date_now(c->availability_start_time,
1329 sizeof(c->availability_start_time));
1331 if (!os->availability_time_offset && pkt->duration) {
1332 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1334 os->availability_time_offset = ((double) c->seg_duration -
1335 frame_duration) / AV_TIME_BASE;
1338 if (c->use_template && !c->use_timeline) {
1339 elapsed_duration = pkt->pts - os->first_pts;
1340 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1342 elapsed_duration = pkt->pts - os->start_pts;
1343 seg_end_duration = c->seg_duration;
1346 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1347 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1348 av_compare_ts(elapsed_duration, st->time_base,
1349 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1350 int64_t prev_duration = c->last_duration;
1352 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1355 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1359 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1360 if (c->last_duration < prev_duration*9/10 ||
1361 c->last_duration > prev_duration*11/10) {
1362 av_log(s, AV_LOG_WARNING,
1363 "Segment durations differ too much, enable use_timeline "
1364 "and use_template, or keep a stricter keyframe interval\n");
1368 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1372 if (!os->packets_written) {
1373 // If we wrote a previous segment, adjust the start time of the segment
1374 // to the end of the previous one (which is the same as the mp4 muxer
1375 // does). This avoids gaps in the timeline.
1376 if (os->max_pts != AV_NOPTS_VALUE)
1377 os->start_pts = os->max_pts;
1379 os->start_pts = pkt->pts;
1381 if (os->max_pts == AV_NOPTS_VALUE)
1382 os->max_pts = pkt->pts + pkt->duration;
1384 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1385 os->packets_written++;
1386 os->total_pkt_size += pkt->size;
1387 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1390 if (!os->init_range_length)
1391 flush_init_segment(s, os);
1393 //open the output context when the first frame of a segment is ready
1394 if (!c->single_file && os->packets_written == 1) {
1395 AVDictionary *opts = NULL;
1396 const char *proto = avio_find_protocol_name(s->url);
1397 int use_rename = proto && !strcmp(proto, "file");
1398 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1399 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1400 c->media_seg_name, pkt->stream_index,
1401 os->segment_index, os->bit_rate, os->start_pts);
1402 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1404 snprintf(os->temp_path, sizeof(os->temp_path),
1405 use_rename ? "%s.tmp" : "%s", os->full_path);
1406 set_http_options(&opts, c);
1407 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1410 av_dict_free(&opts);
1413 //write out the data immediately in streaming mode
1414 if (c->streaming && !strcmp(os->format_name, "mp4")) {
1416 uint8_t *buf = NULL;
1417 if (!os->written_len)
1418 write_styp(os->ctx->pb);
1419 avio_flush(os->ctx->pb);
1420 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1421 avio_write(os->out, buf + os->written_len, len - os->written_len);
1422 os->written_len = len;
1423 avio_flush(os->out);
1429 static int dash_write_trailer(AVFormatContext *s)
1431 DASHContext *c = s->priv_data;
1433 if (s->nb_streams > 0) {
1434 OutputStream *os = &c->streams[0];
1435 // If no segments have been written so far, try to do a crude
1436 // guess of the segment duration
1437 if (!c->last_duration)
1438 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1439 s->streams[0]->time_base,
1441 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1442 s->streams[0]->time_base,
1445 dash_flush(s, 1, -1);
1447 if (c->remove_at_exit) {
1448 char filename[1024];
1450 for (i = 0; i < s->nb_streams; i++) {
1451 OutputStream *os = &c->streams[i];
1452 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1453 dashenc_delete_file(s, filename);
1455 dashenc_delete_file(s, s->url);
1461 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1463 DASHContext *c = s->priv_data;
1464 OutputStream *os = &c->streams[avpkt->stream_index];
1465 AVFormatContext *oc = os->ctx;
1466 if (oc->oformat->check_bitstream) {
1468 AVPacket pkt = *avpkt;
1469 pkt.stream_index = 0;
1470 ret = oc->oformat->check_bitstream(oc, &pkt);
1472 AVStream *st = s->streams[avpkt->stream_index];
1473 AVStream *ost = oc->streams[0];
1474 st->internal->bsfcs = ost->internal->bsfcs;
1475 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1476 ost->internal->bsfcs = NULL;
1477 ost->internal->nb_bsfcs = 0;
1484 #define OFFSET(x) offsetof(DASHContext, x)
1485 #define E AV_OPT_FLAG_ENCODING_PARAM
1486 static const AVOption options[] = {
1487 { "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 },
1488 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1489 { "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 },
1490 #if FF_API_DASH_MIN_SEG_DURATION
1491 { "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 },
1493 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1494 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1495 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1496 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1497 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1498 { "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 },
1499 { "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 },
1500 { "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 },
1501 { "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 },
1502 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1503 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1504 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1505 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1506 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1507 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1508 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1512 static const AVClass dash_class = {
1513 .class_name = "dash muxer",
1514 .item_name = av_default_item_name,
1516 .version = LIBAVUTIL_VERSION_INT,
1519 AVOutputFormat ff_dash_muxer = {
1521 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1522 .extensions = "mpd",
1523 .priv_data_size = sizeof(DASHContext),
1524 .audio_codec = AV_CODEC_ID_AAC,
1525 .video_codec = AV_CODEC_ID_H264,
1526 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1528 .write_header = dash_write_header,
1529 .write_packet = dash_write_packet,
1530 .write_trailer = dash_write_trailer,
1531 .deinit = dash_free,
1532 .check_bitstream = dash_check_bitstream,
1533 .priv_class = &dash_class,