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"
51 typedef struct Segment {
54 int range_length, index_length;
60 typedef struct AdaptationSet {
62 enum AVMediaType media_type;
63 AVDictionary *metadata;
64 AVRational min_frame_rate, max_frame_rate;
65 int ambiguous_frame_rate;
68 typedef struct OutputStream {
70 int ctx_inited, as_idx;
75 int64_t init_start_pos, pos;
76 int init_range_length;
77 int nb_segments, segments_size, segment_index;
79 int64_t first_pts, start_pts, max_pts;
80 int64_t last_dts, last_pts;
88 double availability_time_offset;
93 typedef struct DASHContext {
94 const AVClass *class; /* Class for private options. */
95 char *adaptation_sets;
99 int extra_window_size;
100 #if FF_API_DASH_MIN_SEG_DURATION
101 int min_seg_duration;
103 int64_t seg_duration;
108 OutputStream *streams;
110 int64_t last_duration;
111 int64_t total_duration;
112 char availability_start_time[100];
114 const char *single_file_name;
115 const char *init_seg_name;
116 const char *media_seg_name;
117 const char *utc_timing_url;
119 const char *user_agent;
122 int master_playlist_created;
123 AVIOContext *mpd_out;
124 AVIOContext *m3u8_out;
127 int index_correction;
130 static struct codec_string {
134 { AV_CODEC_ID_VP8, "vp8" },
135 { AV_CODEC_ID_VP9, "vp9" },
136 { AV_CODEC_ID_VORBIS, "vorbis" },
137 { AV_CODEC_ID_OPUS, "opus" },
141 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
142 AVDictionary **options) {
143 DASHContext *c = s->priv_data;
144 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
145 int err = AVERROR_MUXER_NOT_FOUND;
146 if (!*pb || !http_base_proto || !c->http_persistent) {
147 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
148 #if CONFIG_HTTP_PROTOCOL
150 URLContext *http_url_context = ffio_geturlcontext(*pb);
151 av_assert0(http_url_context);
152 err = ff_http_do_new_request(http_url_context, filename);
158 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
159 DASHContext *c = s->priv_data;
160 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
162 if (!http_base_proto || !c->http_persistent) {
163 ff_format_io_close(s, pb);
164 #if CONFIG_HTTP_PROTOCOL
166 URLContext *http_url_context = ffio_geturlcontext(*pb);
167 av_assert0(http_url_context);
169 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
174 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
175 AVRational *frame_rate, char *str, int size) {
177 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
179 av_strlcatf(str, size, "vp09.%02x.%02x.%02x",
180 vpcc.profile, vpcc.level, vpcc.bitdepth);
182 // Default to just vp9 in case of error while finding out profile or level
183 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
184 av_strlcpy(str, "vp9", size);
189 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
190 AVRational *frame_rate, char *str, int size)
192 const AVCodecTag *tags[2] = { NULL, NULL };
196 // common Webm codecs are not part of RFC 6381
197 for (i = 0; codecs[i].id; i++)
198 if (codecs[i].id == par->codec_id) {
199 if (codecs[i].id == AV_CODEC_ID_VP9) {
200 set_vp9_codec_str(s, par, frame_rate, str, size);
202 av_strlcpy(str, codecs[i].str, size);
207 // for codecs part of RFC 6381
208 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
209 tags[0] = ff_codec_movvideo_tags;
210 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
211 tags[0] = ff_codec_movaudio_tags;
215 tag = av_codec_get_tag(tags, par->codec_id);
223 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
225 tags[0] = ff_mp4_obj_type;
226 oti = av_codec_get_tag(tags, par->codec_id);
228 av_strlcatf(str, size, ".%02"PRIx32, oti);
232 if (tag == MKTAG('m', 'p', '4', 'a')) {
233 if (par->extradata_size >= 2) {
234 int aot = par->extradata[0] >> 3;
236 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
237 av_strlcatf(str, size, ".%d", aot);
239 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
240 // Unimplemented, should output ProfileLevelIndication as a decimal number
241 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
243 } else if (!strcmp(str, "avc1")) {
244 uint8_t *tmpbuf = NULL;
245 uint8_t *extradata = par->extradata;
246 int extradata_size = par->extradata_size;
249 if (extradata[0] != 1) {
251 if (avio_open_dyn_buf(&pb) < 0)
253 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
254 ffio_free_dyn_buf(&pb);
257 extradata_size = avio_close_dyn_buf(pb, &extradata);
261 if (extradata_size >= 4)
262 av_strlcatf(str, size, ".%02x%02x%02x",
263 extradata[1], extradata[2], extradata[3]);
268 static int flush_dynbuf(OutputStream *os, int *range_length)
273 return AVERROR(EINVAL);
277 av_write_frame(os->ctx, NULL);
278 avio_flush(os->ctx->pb);
281 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
283 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
288 return avio_open_dyn_buf(&os->ctx->pb);
291 static void set_http_options(AVDictionary **options, DASHContext *c)
294 av_dict_set(options, "method", c->method, 0);
296 av_dict_set(options, "user_agent", c->user_agent, 0);
297 if (c->http_persistent)
298 av_dict_set_int(options, "multiple_requests", 1, 0);
300 av_dict_set_int(options, "timeout", c->timeout, 0);
303 static void get_hls_playlist_name(char *playlist_name, int string_size,
304 const char *base_url, int id) {
306 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
308 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
311 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
313 DASHContext *c = s->priv_data;
314 int ret, range_length;
316 ret = flush_dynbuf(os, &range_length);
320 os->pos = os->init_range_length = range_length;
322 ff_format_io_close(s, &os->out);
326 static void dash_free(AVFormatContext *s)
328 DASHContext *c = s->priv_data;
332 for (i = 0; i < c->nb_as; i++)
333 av_dict_free(&c->as[i].metadata);
340 for (i = 0; i < s->nb_streams; i++) {
341 OutputStream *os = &c->streams[i];
342 if (os->ctx && os->ctx_inited)
343 av_write_trailer(os->ctx);
344 if (os->ctx && os->ctx->pb)
345 ffio_free_dyn_buf(&os->ctx->pb);
346 ff_format_io_close(s, &os->out);
348 avformat_free_context(os->ctx);
349 for (j = 0; j < os->nb_segments; j++)
350 av_free(os->segments[j]);
351 av_free(os->segments);
353 av_freep(&c->streams);
355 ff_format_io_close(s, &c->mpd_out);
356 ff_format_io_close(s, &c->m3u8_out);
359 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
360 int representation_id, int final)
362 DASHContext *c = s->priv_data;
363 int i, start_index = 0, start_number = 1;
364 if (c->window_size) {
365 start_index = FFMAX(os->nb_segments - c->window_size, 0);
366 start_number = FFMAX(os->segment_index - c->window_size, 1);
369 if (c->use_template) {
370 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
371 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
372 if (!c->use_timeline) {
373 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
374 if (c->streaming && os->availability_time_offset)
375 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
376 os->availability_time_offset);
378 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
379 if (c->use_timeline) {
380 int64_t cur_time = 0;
381 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
382 for (i = start_index; i < os->nb_segments; ) {
383 Segment *seg = os->segments[i];
385 avio_printf(out, "\t\t\t\t\t\t<S ");
386 if (i == start_index || seg->time != cur_time) {
387 cur_time = seg->time;
388 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
390 avio_printf(out, "d=\"%d\" ", seg->duration);
391 while (i + repeat + 1 < os->nb_segments &&
392 os->segments[i + repeat + 1]->duration == seg->duration &&
393 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
396 avio_printf(out, "r=\"%d\" ", repeat);
397 avio_printf(out, "/>\n");
399 cur_time += (1 + repeat) * seg->duration;
401 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
403 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
404 } else if (c->single_file) {
405 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
406 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
407 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);
408 for (i = start_index; i < os->nb_segments; i++) {
409 Segment *seg = os->segments[i];
410 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
411 if (seg->index_length)
412 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
413 avio_printf(out, "/>\n");
415 avio_printf(out, "\t\t\t\t</SegmentList>\n");
417 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
418 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
419 for (i = start_index; i < os->nb_segments; i++) {
420 Segment *seg = os->segments[i];
421 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
423 avio_printf(out, "\t\t\t\t</SegmentList>\n");
425 if (c->hls_playlist && start_index < os->nb_segments)
427 int timescale = os->ctx->streams[0]->time_base.den;
428 char temp_filename_hls[1024];
429 char filename_hls[1024];
430 AVDictionary *http_opts = NULL;
431 int target_duration = 0;
433 const char *proto = avio_find_protocol_name(c->dirname);
434 int use_rename = proto && !strcmp(proto, "file");
436 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
437 c->dirname, representation_id);
439 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
441 set_http_options(&http_opts, c);
442 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
443 av_dict_free(&http_opts);
444 for (i = start_index; i < os->nb_segments; i++) {
445 Segment *seg = os->segments[i];
446 double duration = (double) seg->duration / timescale;
447 if (target_duration <= duration)
448 target_duration = lrint(duration);
451 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
452 start_number, PLAYLIST_TYPE_NONE);
454 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
455 os->init_range_length, os->init_start_pos);
457 for (i = start_index; i < os->nb_segments; i++) {
458 Segment *seg = os->segments[i];
459 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
460 (double) seg->duration / timescale, 0,
461 seg->range_length, seg->start_pos, NULL,
462 c->single_file ? os->initfile : seg->file,
465 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
470 ff_hls_write_end_list(c->m3u8_out);
472 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
475 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
476 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
482 static char *xmlescape(const char *str) {
483 int outlen = strlen(str)*3/2 + 6;
484 char *out = av_realloc(NULL, outlen + 1);
488 for (; *str; str++) {
489 if (pos + 6 > outlen) {
491 outlen = 2 * outlen + 6;
492 tmp = av_realloc(out, outlen + 1);
500 memcpy(&out[pos], "&", 5);
502 } else if (*str == '<') {
503 memcpy(&out[pos], "<", 4);
505 } else if (*str == '>') {
506 memcpy(&out[pos], ">", 4);
508 } else if (*str == '\'') {
509 memcpy(&out[pos], "'", 6);
511 } else if (*str == '\"') {
512 memcpy(&out[pos], """, 6);
522 static void write_time(AVIOContext *out, int64_t time)
524 int seconds = time / AV_TIME_BASE;
525 int fractions = time % AV_TIME_BASE;
526 int minutes = seconds / 60;
527 int hours = minutes / 60;
530 avio_printf(out, "PT");
532 avio_printf(out, "%dH", hours);
533 if (hours || minutes)
534 avio_printf(out, "%dM", minutes);
535 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
538 static void format_date_now(char *buf, int size)
540 time_t t = time(NULL);
541 struct tm *ptm, tmbuf;
542 ptm = gmtime_r(&t, &tmbuf);
544 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
549 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
552 DASHContext *c = s->priv_data;
553 AdaptationSet *as = &c->as[as_index];
554 AVDictionaryEntry *lang, *role;
557 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
558 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
559 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)
560 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
561 lang = av_dict_get(as->metadata, "language", NULL, 0);
563 avio_printf(out, " lang=\"%s\"", lang->value);
564 avio_printf(out, ">\n");
566 role = av_dict_get(as->metadata, "role", NULL, 0);
568 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
570 for (i = 0; i < s->nb_streams; i++) {
571 OutputStream *os = &c->streams[i];
572 char bandwidth_str[64] = {'\0'};
574 if (os->as_idx - 1 != as_index)
577 if (os->bit_rate > 0)
578 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
579 os->bit_rate + os->muxer_overhead);
581 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
582 AVStream *st = s->streams[i];
583 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
584 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
585 if (st->avg_frame_rate.num)
586 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
587 avio_printf(out, ">\n");
589 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
590 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
591 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
592 s->streams[i]->codecpar->channels);
594 output_segment_list(os, out, s, i, final);
595 avio_printf(out, "\t\t\t</Representation>\n");
597 avio_printf(out, "\t\t</AdaptationSet>\n");
602 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
604 DASHContext *c = s->priv_data;
606 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
608 return AVERROR(ENOMEM);
612 *as = &c->as[c->nb_as - 1];
613 memset(*as, 0, sizeof(**as));
614 (*as)->media_type = type;
619 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
621 DASHContext *c = s->priv_data;
622 AdaptationSet *as = &c->as[as_idx - 1];
623 OutputStream *os = &c->streams[i];
625 if (as->media_type != s->streams[i]->codecpar->codec_type) {
626 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
627 return AVERROR(EINVAL);
628 } else if (os->as_idx) {
629 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
630 return AVERROR(EINVAL);
637 static int parse_adaptation_sets(AVFormatContext *s)
639 DASHContext *c = s->priv_data;
640 const char *p = c->adaptation_sets;
641 enum { new_set, parse_id, parsing_streams } state;
645 // default: one AdaptationSet for each stream
647 for (i = 0; i < s->nb_streams; i++) {
648 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
650 snprintf(as->id, sizeof(as->id), "%d", i);
652 c->streams[i].as_idx = c->nb_as;
657 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
663 } else if (state == new_set && av_strstart(p, "id=", &p)) {
665 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
669 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
675 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
676 state = parsing_streams;
677 } else if (state == parsing_streams) {
678 AdaptationSet *as = &c->as[c->nb_as - 1];
679 char idx_str[8], *end_str;
681 n = strcspn(p, " ,");
682 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
685 // if value is "a" or "v", map all streams of that type
686 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
687 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
688 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
690 for (i = 0; i < s->nb_streams; i++) {
691 if (s->streams[i]->codecpar->codec_type != type)
694 as->media_type = s->streams[i]->codecpar->codec_type;
696 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
699 } else { // select single stream
700 i = strtol(idx_str, &end_str, 10);
701 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
702 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
703 return AVERROR(EINVAL);
705 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
707 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
708 as->media_type = s->streams[i]->codecpar->codec_type;
711 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
720 return AVERROR(EINVAL);
725 // check for unassigned streams
726 for (i = 0; i < s->nb_streams; i++) {
727 OutputStream *os = &c->streams[i];
729 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
730 return AVERROR(EINVAL);
736 static int write_manifest(AVFormatContext *s, int final)
738 DASHContext *c = s->priv_data;
740 char temp_filename[1024];
742 const char *proto = avio_find_protocol_name(s->url);
743 int use_rename = proto && !strcmp(proto, "file");
744 static unsigned int warned_non_file = 0;
745 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
746 AVDictionary *opts = NULL;
748 if (!use_rename && !warned_non_file++)
749 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
751 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
752 set_http_options(&opts, c);
753 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
755 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
760 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
761 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
762 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
763 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
764 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
765 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
766 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
768 avio_printf(out, "\tmediaPresentationDuration=\"");
769 write_time(out, c->total_duration);
770 avio_printf(out, "\"\n");
772 int64_t update_period = c->last_duration / AV_TIME_BASE;
774 if (c->use_template && !c->use_timeline)
776 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
777 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
778 if (c->availability_start_time[0])
779 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
780 format_date_now(now_str, sizeof(now_str));
782 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
783 if (c->window_size && c->use_template) {
784 avio_printf(out, "\ttimeShiftBufferDepth=\"");
785 write_time(out, c->last_duration * c->window_size);
786 avio_printf(out, "\"\n");
789 avio_printf(out, "\tminBufferTime=\"");
790 write_time(out, c->last_duration * 2);
791 avio_printf(out, "\">\n");
792 avio_printf(out, "\t<ProgramInformation>\n");
794 char *escaped = xmlescape(title->value);
795 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
798 avio_printf(out, "\t</ProgramInformation>\n");
800 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
801 OutputStream *os = &c->streams[0];
802 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
803 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
804 avio_printf(out, "\t<Period id=\"0\" start=\"");
805 write_time(out, start_time);
806 avio_printf(out, "\">\n");
808 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
811 for (i = 0; i < c->nb_as; i++) {
812 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
815 avio_printf(out, "\t</Period>\n");
817 if (c->utc_timing_url)
818 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
820 avio_printf(out, "</MPD>\n");
822 dashenc_io_close(s, &c->mpd_out, temp_filename);
825 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
829 if (c->hls_playlist && !c->master_playlist_created) {
830 char filename_hls[1024];
831 const char *audio_group = "A1";
833 int max_audio_bitrate = 0;
836 snprintf(filename_hls, sizeof(filename_hls), "%s/master.m3u8", c->dirname);
838 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
840 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
842 set_http_options(&opts, c);
843 ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, NULL, &opts);
845 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
850 ff_hls_write_playlist_version(out, 7);
852 for (i = 0; i < s->nb_streams; i++) {
853 char playlist_file[64];
854 AVStream *st = s->streams[i];
855 OutputStream *os = &c->streams[i];
856 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
858 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
859 ff_hls_write_audio_rendition(out, (char *)audio_group,
860 playlist_file, i, is_default);
861 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
862 os->muxer_overhead, max_audio_bitrate);
866 for (i = 0; i < s->nb_streams; i++) {
867 char playlist_file[64];
868 AVStream *st = s->streams[i];
869 OutputStream *os = &c->streams[i];
871 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
872 if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && max_audio_bitrate) {
873 agroup = (char *)audio_group;
874 stream_bitrate += max_audio_bitrate;
876 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
877 ff_hls_write_stream_info(st, out, stream_bitrate, playlist_file, agroup, NULL, NULL);
881 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
883 c->master_playlist_created = 1;
889 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
891 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
893 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
897 static int dash_init(AVFormatContext *s)
899 DASHContext *c = s->priv_data;
904 if (c->single_file_name)
909 #if FF_API_DASH_MIN_SEG_DURATION
910 if (c->min_seg_duration != 5000000) {
911 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
912 c->seg_duration = c->min_seg_duration;
916 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
917 ptr = strrchr(c->dirname, '/');
919 av_strlcpy(basename, &ptr[1], sizeof(basename));
922 c->dirname[0] = '\0';
923 av_strlcpy(basename, s->url, sizeof(basename));
926 ptr = strrchr(basename, '.');
930 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
932 return AVERROR(ENOMEM);
934 if ((ret = parse_adaptation_sets(s)) < 0)
937 for (i = 0; i < s->nb_streams; i++) {
938 OutputStream *os = &c->streams[i];
939 AdaptationSet *as = &c->as[os->as_idx - 1];
940 AVFormatContext *ctx;
942 AVDictionary *opts = NULL;
945 os->bit_rate = s->streams[i]->codecpar->bit_rate;
947 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
948 AV_LOG_ERROR : AV_LOG_WARNING;
949 av_log(s, level, "No bit rate set for stream %d\n", i);
950 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
951 return AVERROR(EINVAL);
954 // copy AdaptationSet language and role from stream metadata
955 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
956 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
958 ctx = avformat_alloc_context();
960 return AVERROR(ENOMEM);
962 // choose muxer based on codec: webm for VP8 and opus, mp4 otherwise
963 // note: os->format_name is also used as part of the mimetype of the
964 // representation, e.g. video/<format_name>
965 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VP8 ||
966 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
967 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_VORBIS) {
968 snprintf(os->format_name, sizeof(os->format_name), "webm");
970 if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
971 av_log(s, AV_LOG_ERROR,
972 "WebM support in dashenc is experimental and has not "
973 "been validated. For testing purposes, make sure "
974 "to add -strict experimental and override "
975 "-init_seg_name and -media_seg_name to end with "
976 "the extension 'webm'.\n");
977 return AVERROR(EINVAL);
980 snprintf(os->format_name, sizeof(os->format_name), "mp4");
982 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
984 return AVERROR_MUXER_NOT_FOUND;
986 ctx->interrupt_callback = s->interrupt_callback;
987 ctx->opaque = s->opaque;
988 ctx->io_close = s->io_close;
989 ctx->io_open = s->io_open;
990 ctx->strict_std_compliance = s->strict_std_compliance;
992 if (!(st = avformat_new_stream(ctx, NULL)))
993 return AVERROR(ENOMEM);
994 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
995 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
996 st->time_base = s->streams[i]->time_base;
997 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
998 ctx->avoid_negative_ts = s->avoid_negative_ts;
999 ctx->flags = s->flags;
1001 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1004 if (c->single_file) {
1005 if (c->single_file_name)
1006 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
1008 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
1010 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
1012 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1013 set_http_options(&opts, c);
1014 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1017 av_dict_free(&opts);
1018 os->init_start_pos = 0;
1020 if (!strcmp(os->format_name, "mp4")) {
1022 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
1024 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1026 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1027 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1028 av_dict_set_int(&opts, "dash", 1, 0);
1029 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1030 av_dict_set_int(&opts, "live", 1, 0);
1032 if ((ret = avformat_init_output(ctx, &opts)) < 0)
1035 avio_flush(ctx->pb);
1036 av_dict_free(&opts);
1038 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1040 s->streams[i]->time_base = st->time_base;
1041 // If the muxer wants to shift timestamps, request to have them shifted
1042 // already before being handed to this muxer, so we don't have mismatches
1043 // between the MPD and the actual segments.
1044 s->avoid_negative_ts = ctx->avoid_negative_ts;
1045 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1046 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1047 if (avg_frame_rate.num > 0) {
1048 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1049 as->min_frame_rate = avg_frame_rate;
1050 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1051 as->max_frame_rate = avg_frame_rate;
1053 as->ambiguous_frame_rate = 1;
1058 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1059 sizeof(os->codec_str));
1060 os->first_pts = AV_NOPTS_VALUE;
1061 os->max_pts = AV_NOPTS_VALUE;
1062 os->last_dts = AV_NOPTS_VALUE;
1063 os->segment_index = 1;
1066 if (!c->has_video && c->seg_duration <= 0) {
1067 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1068 return AVERROR(EINVAL);
1073 static int dash_write_header(AVFormatContext *s)
1075 DASHContext *c = s->priv_data;
1077 for (i = 0; i < s->nb_streams; i++) {
1078 OutputStream *os = &c->streams[i];
1079 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1082 // Flush init segment
1083 // Only for WebM segment, since for mp4 delay_moov is set and
1084 // the init segment is thus flushed after the first packets.
1085 if (strcmp(os->format_name, "mp4") &&
1086 (ret = flush_init_segment(s, os)) < 0)
1092 static int add_segment(OutputStream *os, const char *file,
1093 int64_t time, int duration,
1094 int64_t start_pos, int64_t range_length,
1095 int64_t index_length, int next_exp_index)
1099 if (os->nb_segments >= os->segments_size) {
1100 os->segments_size = (os->segments_size + 1) * 2;
1101 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1102 os->segments_size)) < 0) {
1103 os->segments_size = 0;
1104 os->nb_segments = 0;
1108 seg = av_mallocz(sizeof(*seg));
1110 return AVERROR(ENOMEM);
1111 av_strlcpy(seg->file, file, sizeof(seg->file));
1113 seg->duration = duration;
1114 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1115 seg->duration += seg->time;
1118 seg->start_pos = start_pos;
1119 seg->range_length = range_length;
1120 seg->index_length = index_length;
1121 os->segments[os->nb_segments++] = seg;
1122 os->segment_index++;
1123 //correcting the segment index if it has fallen behind the expected value
1124 if (os->segment_index < next_exp_index) {
1125 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1126 file, os->segment_index, next_exp_index);
1127 os->segment_index = next_exp_index;
1132 static void write_styp(AVIOContext *pb)
1135 ffio_wfourcc(pb, "styp");
1136 ffio_wfourcc(pb, "msdh");
1137 avio_wb32(pb, 0); /* minor */
1138 ffio_wfourcc(pb, "msdh");
1139 ffio_wfourcc(pb, "msix");
1142 static void find_index_range(AVFormatContext *s, const char *full_path,
1143 int64_t pos, int *index_length)
1149 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1152 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1153 ff_format_io_close(s, &pb);
1156 ret = avio_read(pb, buf, 8);
1157 ff_format_io_close(s, &pb);
1160 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1162 *index_length = AV_RB32(&buf[0]);
1165 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1166 AVCodecParameters *par,
1167 AVRational *frame_rate)
1171 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1174 extradata = av_malloc(par->extradata_size);
1177 return AVERROR(ENOMEM);
1179 memcpy(extradata, par->extradata, par->extradata_size);
1181 os->ctx->streams[0]->codecpar->extradata = extradata;
1182 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1184 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1189 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1190 DASHContext *c = s->priv_data;
1191 int http_base_proto = ff_is_http_proto(filename);
1193 if (http_base_proto) {
1194 AVIOContext *out = NULL;
1195 AVDictionary *http_opts = NULL;
1197 set_http_options(&http_opts, c);
1198 av_dict_set(&http_opts, "method", "DELETE", 0);
1200 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1201 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1204 av_dict_free(&http_opts);
1205 dashenc_io_close(s, &out, filename);
1206 } else if (unlink(filename) < 0) {
1207 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1211 static int dash_flush(AVFormatContext *s, int final, int stream)
1213 DASHContext *c = s->priv_data;
1216 const char *proto = avio_find_protocol_name(s->url);
1217 int use_rename = proto && !strcmp(proto, "file");
1219 int cur_flush_segment_index = 0, next_exp_index = -1;
1221 cur_flush_segment_index = c->streams[stream].segment_index;
1223 //finding the next segment's expected index, based on the current pts value
1224 if (c->use_template && !c->use_timeline && c->index_correction &&
1225 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1226 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1227 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1228 c->streams[stream].first_pts,
1229 s->streams[stream]->time_base,
1231 next_exp_index = (pts_diff / c->seg_duration) + 1;
1235 for (i = 0; i < s->nb_streams; i++) {
1236 OutputStream *os = &c->streams[i];
1237 AVStream *st = s->streams[i];
1238 int range_length, index_length = 0;
1240 if (!os->packets_written)
1243 // Flush the single stream that got a keyframe right now.
1244 // Flush all audio streams as well, in sync with video keyframes,
1245 // but not the other video streams.
1246 if (stream >= 0 && i != stream) {
1247 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1249 // Make sure we don't flush audio streams multiple times, when
1250 // all video streams are flushed one at a time.
1251 if (c->has_video && os->segment_index > cur_flush_segment_index)
1255 if (!c->single_file) {
1256 if (!strcmp(os->format_name, "mp4") && !os->written_len)
1257 write_styp(os->ctx->pb);
1259 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1262 ret = flush_dynbuf(os, &range_length);
1265 os->packets_written = 0;
1267 if (c->single_file) {
1268 find_index_range(s, os->full_path, os->pos, &index_length);
1270 dashenc_io_close(s, &os->out, os->temp_path);
1273 ret = avpriv_io_move(os->temp_path, os->full_path);
1279 if (!os->muxer_overhead)
1280 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1282 av_rescale_q(os->max_pts - os->start_pts,
1283 st->time_base, AV_TIME_BASE_Q);
1284 os->total_pkt_size = 0;
1286 if (!os->bit_rate) {
1287 // calculate average bitrate of first segment
1288 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1292 os->bit_rate = bitrate;
1294 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1295 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1297 os->pos += range_length;
1300 if (c->window_size || (final && c->remove_at_exit)) {
1301 for (i = 0; i < s->nb_streams; i++) {
1302 OutputStream *os = &c->streams[i];
1304 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1305 if (final && c->remove_at_exit)
1306 remove = os->nb_segments;
1308 for (j = 0; j < remove; j++) {
1309 char filename[1024];
1310 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1311 dashenc_delete_file(s, filename);
1312 av_free(os->segments[j]);
1314 os->nb_segments -= remove;
1315 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1321 ret = write_manifest(s, final);
1325 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1327 DASHContext *c = s->priv_data;
1328 AVStream *st = s->streams[pkt->stream_index];
1329 OutputStream *os = &c->streams[pkt->stream_index];
1330 int64_t seg_end_duration, elapsed_duration;
1333 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1337 // Fill in a heuristic guess of the packet duration, if none is available.
1338 // The mp4 muxer will do something similar (for the last packet in a fragment)
1339 // if nothing is set (setting it for the other packets doesn't hurt).
1340 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1341 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1342 // so that we know the exact timestamps of fragments.
1343 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1344 pkt->duration = pkt->dts - os->last_dts;
1345 os->last_dts = pkt->dts;
1347 // If forcing the stream to start at 0, the mp4 muxer will set the start
1348 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1349 if (os->first_pts == AV_NOPTS_VALUE &&
1350 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1351 pkt->pts -= pkt->dts;
1355 if (os->first_pts == AV_NOPTS_VALUE)
1356 os->first_pts = pkt->pts;
1357 os->last_pts = pkt->pts;
1359 if (!c->availability_start_time[0])
1360 format_date_now(c->availability_start_time,
1361 sizeof(c->availability_start_time));
1363 if (!os->availability_time_offset && pkt->duration) {
1364 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1366 os->availability_time_offset = ((double) c->seg_duration -
1367 frame_duration) / AV_TIME_BASE;
1370 if (c->use_template && !c->use_timeline) {
1371 elapsed_duration = pkt->pts - os->first_pts;
1372 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1374 elapsed_duration = pkt->pts - os->start_pts;
1375 seg_end_duration = c->seg_duration;
1378 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1379 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1380 av_compare_ts(elapsed_duration, st->time_base,
1381 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1382 int64_t prev_duration = c->last_duration;
1384 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1387 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1391 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1392 if (c->last_duration < prev_duration*9/10 ||
1393 c->last_duration > prev_duration*11/10) {
1394 av_log(s, AV_LOG_WARNING,
1395 "Segment durations differ too much, enable use_timeline "
1396 "and use_template, or keep a stricter keyframe interval\n");
1400 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1404 if (!os->packets_written) {
1405 // If we wrote a previous segment, adjust the start time of the segment
1406 // to the end of the previous one (which is the same as the mp4 muxer
1407 // does). This avoids gaps in the timeline.
1408 if (os->max_pts != AV_NOPTS_VALUE)
1409 os->start_pts = os->max_pts;
1411 os->start_pts = pkt->pts;
1413 if (os->max_pts == AV_NOPTS_VALUE)
1414 os->max_pts = pkt->pts + pkt->duration;
1416 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1417 os->packets_written++;
1418 os->total_pkt_size += pkt->size;
1419 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1422 if (!os->init_range_length)
1423 flush_init_segment(s, os);
1425 //open the output context when the first frame of a segment is ready
1426 if (!c->single_file && os->packets_written == 1) {
1427 AVDictionary *opts = NULL;
1428 const char *proto = avio_find_protocol_name(s->url);
1429 int use_rename = proto && !strcmp(proto, "file");
1430 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1431 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1432 c->media_seg_name, pkt->stream_index,
1433 os->segment_index, os->bit_rate, os->start_pts);
1434 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1436 snprintf(os->temp_path, sizeof(os->temp_path),
1437 use_rename ? "%s.tmp" : "%s", os->full_path);
1438 set_http_options(&opts, c);
1439 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1442 av_dict_free(&opts);
1445 //write out the data immediately in streaming mode
1446 if (c->streaming && !strcmp(os->format_name, "mp4")) {
1448 uint8_t *buf = NULL;
1449 if (!os->written_len)
1450 write_styp(os->ctx->pb);
1451 avio_flush(os->ctx->pb);
1452 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1453 avio_write(os->out, buf + os->written_len, len - os->written_len);
1454 os->written_len = len;
1455 avio_flush(os->out);
1461 static int dash_write_trailer(AVFormatContext *s)
1463 DASHContext *c = s->priv_data;
1465 if (s->nb_streams > 0) {
1466 OutputStream *os = &c->streams[0];
1467 // If no segments have been written so far, try to do a crude
1468 // guess of the segment duration
1469 if (!c->last_duration)
1470 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1471 s->streams[0]->time_base,
1473 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1474 s->streams[0]->time_base,
1477 dash_flush(s, 1, -1);
1479 if (c->remove_at_exit) {
1480 char filename[1024];
1482 for (i = 0; i < s->nb_streams; i++) {
1483 OutputStream *os = &c->streams[i];
1484 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1485 dashenc_delete_file(s, filename);
1487 dashenc_delete_file(s, s->url);
1493 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1495 DASHContext *c = s->priv_data;
1496 OutputStream *os = &c->streams[avpkt->stream_index];
1497 AVFormatContext *oc = os->ctx;
1498 if (oc->oformat->check_bitstream) {
1500 AVPacket pkt = *avpkt;
1501 pkt.stream_index = 0;
1502 ret = oc->oformat->check_bitstream(oc, &pkt);
1504 AVStream *st = s->streams[avpkt->stream_index];
1505 AVStream *ost = oc->streams[0];
1506 st->internal->bsfcs = ost->internal->bsfcs;
1507 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1508 ost->internal->bsfcs = NULL;
1509 ost->internal->nb_bsfcs = 0;
1516 #define OFFSET(x) offsetof(DASHContext, x)
1517 #define E AV_OPT_FLAG_ENCODING_PARAM
1518 static const AVOption options[] = {
1519 { "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 },
1520 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1521 { "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 },
1522 #if FF_API_DASH_MIN_SEG_DURATION
1523 { "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 },
1525 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1526 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1527 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1528 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1529 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1530 { "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 },
1531 { "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 },
1532 { "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 },
1533 { "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 },
1534 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1535 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1536 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1537 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1538 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1539 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1540 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1544 static const AVClass dash_class = {
1545 .class_name = "dash muxer",
1546 .item_name = av_default_item_name,
1548 .version = LIBAVUTIL_VERSION_INT,
1551 AVOutputFormat ff_dash_muxer = {
1553 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1554 .extensions = "mpd",
1555 .priv_data_size = sizeof(DASHContext),
1556 .audio_codec = AV_CODEC_ID_AAC,
1557 .video_codec = AV_CODEC_ID_H264,
1558 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1560 .write_header = dash_write_header,
1561 .write_packet = dash_write_packet,
1562 .write_trailer = dash_write_trailer,
1563 .deinit = dash_free,
1564 .check_bitstream = dash_check_bitstream,
1565 .priv_class = &dash_class,