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"
57 typedef struct Segment {
60 int range_length, index_length;
66 typedef struct AdaptationSet {
68 enum AVMediaType media_type;
69 AVDictionary *metadata;
70 AVRational min_frame_rate, max_frame_rate;
71 int ambiguous_frame_rate;
74 typedef struct OutputStream {
76 int ctx_inited, as_idx;
80 int64_t init_start_pos, pos;
81 int init_range_length;
82 int nb_segments, segments_size, segment_index;
84 int64_t first_pts, start_pts, max_pts;
85 int64_t last_dts, last_pts;
93 double availability_time_offset;
98 typedef struct DASHContext {
99 const AVClass *class; /* Class for private options. */
100 char *adaptation_sets;
104 int extra_window_size;
105 #if FF_API_DASH_MIN_SEG_DURATION
106 int min_seg_duration;
108 int64_t seg_duration;
113 OutputStream *streams;
115 int64_t last_duration;
116 int64_t total_duration;
117 char availability_start_time[100];
119 const char *single_file_name;
120 const char *init_seg_name;
121 const char *media_seg_name;
122 const char *utc_timing_url;
124 const char *user_agent;
127 int master_playlist_created;
128 AVIOContext *mpd_out;
129 AVIOContext *m3u8_out;
132 int index_correction;
133 char *format_options_str;
134 SegmentType segment_type;
135 const char *format_name;
138 static struct codec_string {
142 { AV_CODEC_ID_VP8, "vp8" },
143 { AV_CODEC_ID_VP9, "vp9" },
144 { AV_CODEC_ID_VORBIS, "vorbis" },
145 { AV_CODEC_ID_OPUS, "opus" },
149 static struct format_string {
150 SegmentType segment_type;
153 { SEGMENT_TYPE_MP4, "mp4" },
154 { SEGMENT_TYPE_WEBM, "webm" },
158 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
159 AVDictionary **options) {
160 DASHContext *c = s->priv_data;
161 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
162 int err = AVERROR_MUXER_NOT_FOUND;
163 if (!*pb || !http_base_proto || !c->http_persistent) {
164 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
165 #if CONFIG_HTTP_PROTOCOL
167 URLContext *http_url_context = ffio_geturlcontext(*pb);
168 av_assert0(http_url_context);
169 err = ff_http_do_new_request(http_url_context, filename);
175 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
176 DASHContext *c = s->priv_data;
177 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
179 if (!http_base_proto || !c->http_persistent) {
180 ff_format_io_close(s, pb);
181 #if CONFIG_HTTP_PROTOCOL
183 URLContext *http_url_context = ffio_geturlcontext(*pb);
184 av_assert0(http_url_context);
186 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
191 static const char *get_format_str(SegmentType segment_type) {
193 for (i = 0; i < SEGMENT_TYPE_NB; i++)
194 if (formats[i].segment_type == segment_type)
195 return formats[i].str;
199 static int check_file_extension(const char *filename, const char *extension) {
201 if (!filename || !extension)
203 dot = strrchr(filename, '.');
204 if (dot && !strcmp(dot + 1, extension))
209 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
210 AVRational *frame_rate, char *str, int size) {
212 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
214 av_strlcatf(str, size, "vp09.%02x.%02x.%02x",
215 vpcc.profile, vpcc.level, vpcc.bitdepth);
217 // Default to just vp9 in case of error while finding out profile or level
218 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
219 av_strlcpy(str, "vp9", size);
224 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
225 AVRational *frame_rate, char *str, int size)
227 const AVCodecTag *tags[2] = { NULL, NULL };
231 // common Webm codecs are not part of RFC 6381
232 for (i = 0; codecs[i].id; i++)
233 if (codecs[i].id == par->codec_id) {
234 if (codecs[i].id == AV_CODEC_ID_VP9) {
235 set_vp9_codec_str(s, par, frame_rate, str, size);
237 av_strlcpy(str, codecs[i].str, size);
242 // for codecs part of RFC 6381
243 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
244 tags[0] = ff_codec_movvideo_tags;
245 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
246 tags[0] = ff_codec_movaudio_tags;
250 tag = av_codec_get_tag(tags, par->codec_id);
258 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
260 tags[0] = ff_mp4_obj_type;
261 oti = av_codec_get_tag(tags, par->codec_id);
263 av_strlcatf(str, size, ".%02"PRIx32, oti);
267 if (tag == MKTAG('m', 'p', '4', 'a')) {
268 if (par->extradata_size >= 2) {
269 int aot = par->extradata[0] >> 3;
271 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
272 av_strlcatf(str, size, ".%d", aot);
274 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
275 // Unimplemented, should output ProfileLevelIndication as a decimal number
276 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
278 } else if (!strcmp(str, "avc1")) {
279 uint8_t *tmpbuf = NULL;
280 uint8_t *extradata = par->extradata;
281 int extradata_size = par->extradata_size;
284 if (extradata[0] != 1) {
286 if (avio_open_dyn_buf(&pb) < 0)
288 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
289 ffio_free_dyn_buf(&pb);
292 extradata_size = avio_close_dyn_buf(pb, &extradata);
296 if (extradata_size >= 4)
297 av_strlcatf(str, size, ".%02x%02x%02x",
298 extradata[1], extradata[2], extradata[3]);
303 static int flush_dynbuf(OutputStream *os, int *range_length)
308 return AVERROR(EINVAL);
312 av_write_frame(os->ctx, NULL);
313 avio_flush(os->ctx->pb);
316 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
318 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
323 return avio_open_dyn_buf(&os->ctx->pb);
326 static void set_http_options(AVDictionary **options, DASHContext *c)
329 av_dict_set(options, "method", c->method, 0);
331 av_dict_set(options, "user_agent", c->user_agent, 0);
332 if (c->http_persistent)
333 av_dict_set_int(options, "multiple_requests", 1, 0);
335 av_dict_set_int(options, "timeout", c->timeout, 0);
338 static void get_hls_playlist_name(char *playlist_name, int string_size,
339 const char *base_url, int id) {
341 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
343 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
346 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
348 DASHContext *c = s->priv_data;
349 int ret, range_length;
351 ret = flush_dynbuf(os, &range_length);
355 os->pos = os->init_range_length = range_length;
357 ff_format_io_close(s, &os->out);
361 static void dash_free(AVFormatContext *s)
363 DASHContext *c = s->priv_data;
367 for (i = 0; i < c->nb_as; i++)
368 av_dict_free(&c->as[i].metadata);
375 for (i = 0; i < s->nb_streams; i++) {
376 OutputStream *os = &c->streams[i];
377 if (os->ctx && os->ctx_inited)
378 av_write_trailer(os->ctx);
379 if (os->ctx && os->ctx->pb)
380 ffio_free_dyn_buf(&os->ctx->pb);
381 ff_format_io_close(s, &os->out);
383 avformat_free_context(os->ctx);
384 for (j = 0; j < os->nb_segments; j++)
385 av_free(os->segments[j]);
386 av_free(os->segments);
388 av_freep(&c->streams);
390 ff_format_io_close(s, &c->mpd_out);
391 ff_format_io_close(s, &c->m3u8_out);
394 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
395 int representation_id, int final)
397 DASHContext *c = s->priv_data;
398 int i, start_index = 0, start_number = 1;
399 if (c->window_size) {
400 start_index = FFMAX(os->nb_segments - c->window_size, 0);
401 start_number = FFMAX(os->segment_index - c->window_size, 1);
404 if (c->use_template) {
405 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
406 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
407 if (!c->use_timeline) {
408 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
409 if (c->streaming && os->availability_time_offset)
410 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
411 os->availability_time_offset);
413 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
414 if (c->use_timeline) {
415 int64_t cur_time = 0;
416 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
417 for (i = start_index; i < os->nb_segments; ) {
418 Segment *seg = os->segments[i];
420 avio_printf(out, "\t\t\t\t\t\t<S ");
421 if (i == start_index || seg->time != cur_time) {
422 cur_time = seg->time;
423 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
425 avio_printf(out, "d=\"%d\" ", seg->duration);
426 while (i + repeat + 1 < os->nb_segments &&
427 os->segments[i + repeat + 1]->duration == seg->duration &&
428 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
431 avio_printf(out, "r=\"%d\" ", repeat);
432 avio_printf(out, "/>\n");
434 cur_time += (1 + repeat) * seg->duration;
436 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
438 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
439 } else if (c->single_file) {
440 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
441 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
442 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);
443 for (i = start_index; i < os->nb_segments; i++) {
444 Segment *seg = os->segments[i];
445 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
446 if (seg->index_length)
447 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
448 avio_printf(out, "/>\n");
450 avio_printf(out, "\t\t\t\t</SegmentList>\n");
452 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
453 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
454 for (i = start_index; i < os->nb_segments; i++) {
455 Segment *seg = os->segments[i];
456 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
458 avio_printf(out, "\t\t\t\t</SegmentList>\n");
460 if (c->hls_playlist && start_index < os->nb_segments)
462 int timescale = os->ctx->streams[0]->time_base.den;
463 char temp_filename_hls[1024];
464 char filename_hls[1024];
465 AVDictionary *http_opts = NULL;
466 int target_duration = 0;
468 const char *proto = avio_find_protocol_name(c->dirname);
469 int use_rename = proto && !strcmp(proto, "file");
471 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
472 c->dirname, representation_id);
474 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
476 set_http_options(&http_opts, c);
477 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
478 av_dict_free(&http_opts);
479 for (i = start_index; i < os->nb_segments; i++) {
480 Segment *seg = os->segments[i];
481 double duration = (double) seg->duration / timescale;
482 if (target_duration <= duration)
483 target_duration = lrint(duration);
486 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
487 start_number, PLAYLIST_TYPE_NONE);
489 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
490 os->init_range_length, os->init_start_pos);
492 for (i = start_index; i < os->nb_segments; i++) {
493 Segment *seg = os->segments[i];
494 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
495 (double) seg->duration / timescale, 0,
496 seg->range_length, seg->start_pos, NULL,
497 c->single_file ? os->initfile : seg->file,
500 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
505 ff_hls_write_end_list(c->m3u8_out);
507 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
510 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
511 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
517 static char *xmlescape(const char *str) {
518 int outlen = strlen(str)*3/2 + 6;
519 char *out = av_realloc(NULL, outlen + 1);
523 for (; *str; str++) {
524 if (pos + 6 > outlen) {
526 outlen = 2 * outlen + 6;
527 tmp = av_realloc(out, outlen + 1);
535 memcpy(&out[pos], "&", 5);
537 } else if (*str == '<') {
538 memcpy(&out[pos], "<", 4);
540 } else if (*str == '>') {
541 memcpy(&out[pos], ">", 4);
543 } else if (*str == '\'') {
544 memcpy(&out[pos], "'", 6);
546 } else if (*str == '\"') {
547 memcpy(&out[pos], """, 6);
557 static void write_time(AVIOContext *out, int64_t time)
559 int seconds = time / AV_TIME_BASE;
560 int fractions = time % AV_TIME_BASE;
561 int minutes = seconds / 60;
562 int hours = minutes / 60;
565 avio_printf(out, "PT");
567 avio_printf(out, "%dH", hours);
568 if (hours || minutes)
569 avio_printf(out, "%dM", minutes);
570 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
573 static void format_date_now(char *buf, int size)
575 time_t t = time(NULL);
576 struct tm *ptm, tmbuf;
577 ptm = gmtime_r(&t, &tmbuf);
579 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
584 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
587 DASHContext *c = s->priv_data;
588 AdaptationSet *as = &c->as[as_index];
589 AVDictionaryEntry *lang, *role;
592 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
593 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
594 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)
595 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
596 lang = av_dict_get(as->metadata, "language", NULL, 0);
598 avio_printf(out, " lang=\"%s\"", lang->value);
599 avio_printf(out, ">\n");
601 role = av_dict_get(as->metadata, "role", NULL, 0);
603 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
605 for (i = 0; i < s->nb_streams; i++) {
606 OutputStream *os = &c->streams[i];
607 char bandwidth_str[64] = {'\0'};
609 if (os->as_idx - 1 != as_index)
612 if (os->bit_rate > 0)
613 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
616 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
617 AVStream *st = s->streams[i];
618 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
619 i, c->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
620 if (st->avg_frame_rate.num)
621 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
622 avio_printf(out, ">\n");
624 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
625 i, c->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
626 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
627 s->streams[i]->codecpar->channels);
629 output_segment_list(os, out, s, i, final);
630 avio_printf(out, "\t\t\t</Representation>\n");
632 avio_printf(out, "\t\t</AdaptationSet>\n");
637 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
639 DASHContext *c = s->priv_data;
641 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
643 return AVERROR(ENOMEM);
647 *as = &c->as[c->nb_as - 1];
648 memset(*as, 0, sizeof(**as));
649 (*as)->media_type = type;
654 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
656 DASHContext *c = s->priv_data;
657 AdaptationSet *as = &c->as[as_idx - 1];
658 OutputStream *os = &c->streams[i];
660 if (as->media_type != s->streams[i]->codecpar->codec_type) {
661 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
662 return AVERROR(EINVAL);
663 } else if (os->as_idx) {
664 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
665 return AVERROR(EINVAL);
672 static int parse_adaptation_sets(AVFormatContext *s)
674 DASHContext *c = s->priv_data;
675 const char *p = c->adaptation_sets;
676 enum { new_set, parse_id, parsing_streams } state;
680 // default: one AdaptationSet for each stream
682 for (i = 0; i < s->nb_streams; i++) {
683 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
685 snprintf(as->id, sizeof(as->id), "%d", i);
687 c->streams[i].as_idx = c->nb_as;
692 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
698 } else if (state == new_set && av_strstart(p, "id=", &p)) {
700 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
704 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
710 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
711 state = parsing_streams;
712 } else if (state == parsing_streams) {
713 AdaptationSet *as = &c->as[c->nb_as - 1];
714 char idx_str[8], *end_str;
716 n = strcspn(p, " ,");
717 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
720 // if value is "a" or "v", map all streams of that type
721 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
722 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
723 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
725 for (i = 0; i < s->nb_streams; i++) {
726 if (s->streams[i]->codecpar->codec_type != type)
729 as->media_type = s->streams[i]->codecpar->codec_type;
731 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
734 } else { // select single stream
735 i = strtol(idx_str, &end_str, 10);
736 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
737 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
738 return AVERROR(EINVAL);
740 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
742 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
743 as->media_type = s->streams[i]->codecpar->codec_type;
746 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
755 return AVERROR(EINVAL);
760 // check for unassigned streams
761 for (i = 0; i < s->nb_streams; i++) {
762 OutputStream *os = &c->streams[i];
764 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
765 return AVERROR(EINVAL);
771 static int write_manifest(AVFormatContext *s, int final)
773 DASHContext *c = s->priv_data;
775 char temp_filename[1024];
777 const char *proto = avio_find_protocol_name(s->url);
778 int use_rename = proto && !strcmp(proto, "file");
779 static unsigned int warned_non_file = 0;
780 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
781 AVDictionary *opts = NULL;
783 if (!use_rename && !warned_non_file++)
784 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
786 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
787 set_http_options(&opts, c);
788 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
790 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
795 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
796 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
797 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
798 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
799 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
800 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
801 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
803 avio_printf(out, "\tmediaPresentationDuration=\"");
804 write_time(out, c->total_duration);
805 avio_printf(out, "\"\n");
807 int64_t update_period = c->last_duration / AV_TIME_BASE;
809 if (c->use_template && !c->use_timeline)
811 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
812 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
813 if (c->availability_start_time[0])
814 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
815 format_date_now(now_str, sizeof(now_str));
817 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
818 if (c->window_size && c->use_template) {
819 avio_printf(out, "\ttimeShiftBufferDepth=\"");
820 write_time(out, c->last_duration * c->window_size);
821 avio_printf(out, "\"\n");
824 avio_printf(out, "\tminBufferTime=\"");
825 write_time(out, c->last_duration * 2);
826 avio_printf(out, "\">\n");
827 avio_printf(out, "\t<ProgramInformation>\n");
829 char *escaped = xmlescape(title->value);
830 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
833 avio_printf(out, "\t</ProgramInformation>\n");
835 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
836 OutputStream *os = &c->streams[0];
837 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
838 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
839 avio_printf(out, "\t<Period id=\"0\" start=\"");
840 write_time(out, start_time);
841 avio_printf(out, "\">\n");
843 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
846 for (i = 0; i < c->nb_as; i++) {
847 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
850 avio_printf(out, "\t</Period>\n");
852 if (c->utc_timing_url)
853 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
855 avio_printf(out, "</MPD>\n");
857 dashenc_io_close(s, &c->mpd_out, temp_filename);
860 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
864 if (c->hls_playlist && !c->master_playlist_created) {
865 char filename_hls[1024];
866 const char *audio_group = "A1";
867 char audio_codec_str[128] = "\0";
869 int max_audio_bitrate = 0;
872 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
874 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
876 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
878 set_http_options(&opts, c);
879 ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, NULL, &opts);
881 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
886 ff_hls_write_playlist_version(out, 7);
888 for (i = 0; i < s->nb_streams; i++) {
889 char playlist_file[64];
890 AVStream *st = s->streams[i];
891 OutputStream *os = &c->streams[i];
892 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
894 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
895 ff_hls_write_audio_rendition(out, (char *)audio_group,
896 playlist_file, i, is_default);
897 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
898 os->muxer_overhead, max_audio_bitrate);
899 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
900 if (strlen(audio_codec_str))
901 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
902 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
907 for (i = 0; i < s->nb_streams; i++) {
908 char playlist_file[64];
910 AVStream *st = s->streams[i];
911 OutputStream *os = &c->streams[i];
913 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
914 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
915 if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && max_audio_bitrate) {
916 agroup = (char *)audio_group;
917 stream_bitrate += max_audio_bitrate;
918 av_strlcat(codec_str, ",", sizeof(codec_str));
919 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
921 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
922 ff_hls_write_stream_info(st, out, stream_bitrate, playlist_file, agroup,
927 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
929 c->master_playlist_created = 1;
935 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
937 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
939 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
943 static int dash_init(AVFormatContext *s)
945 DASHContext *c = s->priv_data;
950 if (c->single_file_name)
955 #if FF_API_DASH_MIN_SEG_DURATION
956 if (c->min_seg_duration != 5000000) {
957 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
958 c->seg_duration = c->min_seg_duration;
962 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
963 ptr = strrchr(c->dirname, '/');
965 av_strlcpy(basename, &ptr[1], sizeof(basename));
968 c->dirname[0] = '\0';
969 av_strlcpy(basename, s->url, sizeof(basename));
972 ptr = strrchr(basename, '.');
976 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
978 return AVERROR(ENOMEM);
980 if ((ret = parse_adaptation_sets(s)) < 0)
983 for (i = 0; i < s->nb_streams; i++) {
984 OutputStream *os = &c->streams[i];
985 AdaptationSet *as = &c->as[os->as_idx - 1];
986 AVFormatContext *ctx;
988 AVDictionary *opts = NULL;
991 os->bit_rate = s->streams[i]->codecpar->bit_rate;
993 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
994 AV_LOG_ERROR : AV_LOG_WARNING;
995 av_log(s, level, "No bit rate set for stream %d\n", i);
996 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
997 return AVERROR(EINVAL);
1000 // copy AdaptationSet language and role from stream metadata
1001 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1002 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1004 ctx = avformat_alloc_context();
1006 return AVERROR(ENOMEM);
1008 c->format_name = get_format_str(c->segment_type);
1009 if (!c->format_name)
1010 return AVERROR_MUXER_NOT_FOUND;
1011 if (c->segment_type == SEGMENT_TYPE_WEBM) {
1012 if ((!c->single_file && check_file_extension(c->init_seg_name, c->format_name) != 0) ||
1013 (!c->single_file && check_file_extension(c->media_seg_name, c->format_name) != 0) ||
1014 (c->single_file && check_file_extension(c->single_file_name, c->format_name) != 0)) {
1015 av_log(s, AV_LOG_WARNING,
1016 "One or many segment file names doesn't end with .webm. "
1017 "Override -init_seg_name and/or -media_seg_name and/or "
1018 "-single_file_name to end with the extension .webm\n");
1022 ctx->oformat = av_guess_format(c->format_name, NULL, NULL);
1024 return AVERROR_MUXER_NOT_FOUND;
1026 ctx->interrupt_callback = s->interrupt_callback;
1027 ctx->opaque = s->opaque;
1028 ctx->io_close = s->io_close;
1029 ctx->io_open = s->io_open;
1030 ctx->strict_std_compliance = s->strict_std_compliance;
1032 if (!(st = avformat_new_stream(ctx, NULL)))
1033 return AVERROR(ENOMEM);
1034 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1035 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1036 st->time_base = s->streams[i]->time_base;
1037 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1038 ctx->avoid_negative_ts = s->avoid_negative_ts;
1039 ctx->flags = s->flags;
1041 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1044 if (c->single_file) {
1045 if (c->single_file_name)
1046 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
1048 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
1050 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
1052 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1053 set_http_options(&opts, c);
1054 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1057 av_dict_free(&opts);
1058 os->init_start_pos = 0;
1060 if (c->format_options_str) {
1061 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1066 if (c->segment_type == SEGMENT_TYPE_MP4) {
1068 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov", 0);
1070 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1072 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1073 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1074 av_dict_set_int(&opts, "dash", 1, 0);
1075 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1076 av_dict_set_int(&opts, "live", 1, 0);
1078 if ((ret = avformat_init_output(ctx, &opts)) < 0)
1081 avio_flush(ctx->pb);
1082 av_dict_free(&opts);
1084 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1086 s->streams[i]->time_base = st->time_base;
1087 // If the muxer wants to shift timestamps, request to have them shifted
1088 // already before being handed to this muxer, so we don't have mismatches
1089 // between the MPD and the actual segments.
1090 s->avoid_negative_ts = ctx->avoid_negative_ts;
1091 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1092 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1093 if (avg_frame_rate.num > 0) {
1094 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1095 as->min_frame_rate = avg_frame_rate;
1096 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1097 as->max_frame_rate = avg_frame_rate;
1099 as->ambiguous_frame_rate = 1;
1104 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1105 sizeof(os->codec_str));
1106 os->first_pts = AV_NOPTS_VALUE;
1107 os->max_pts = AV_NOPTS_VALUE;
1108 os->last_dts = AV_NOPTS_VALUE;
1109 os->segment_index = 1;
1112 if (!c->has_video && c->seg_duration <= 0) {
1113 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1114 return AVERROR(EINVAL);
1119 static int dash_write_header(AVFormatContext *s)
1121 DASHContext *c = s->priv_data;
1123 for (i = 0; i < s->nb_streams; i++) {
1124 OutputStream *os = &c->streams[i];
1125 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1128 // Flush init segment
1129 // Only for WebM segment, since for mp4 delay_moov is set and
1130 // the init segment is thus flushed after the first packets.
1131 if (c->segment_type == SEGMENT_TYPE_WEBM &&
1132 (ret = flush_init_segment(s, os)) < 0)
1138 static int add_segment(OutputStream *os, const char *file,
1139 int64_t time, int duration,
1140 int64_t start_pos, int64_t range_length,
1141 int64_t index_length, int next_exp_index)
1145 if (os->nb_segments >= os->segments_size) {
1146 os->segments_size = (os->segments_size + 1) * 2;
1147 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1148 os->segments_size)) < 0) {
1149 os->segments_size = 0;
1150 os->nb_segments = 0;
1154 seg = av_mallocz(sizeof(*seg));
1156 return AVERROR(ENOMEM);
1157 av_strlcpy(seg->file, file, sizeof(seg->file));
1159 seg->duration = duration;
1160 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1161 seg->duration += seg->time;
1164 seg->start_pos = start_pos;
1165 seg->range_length = range_length;
1166 seg->index_length = index_length;
1167 os->segments[os->nb_segments++] = seg;
1168 os->segment_index++;
1169 //correcting the segment index if it has fallen behind the expected value
1170 if (os->segment_index < next_exp_index) {
1171 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1172 file, os->segment_index, next_exp_index);
1173 os->segment_index = next_exp_index;
1178 static void write_styp(AVIOContext *pb)
1181 ffio_wfourcc(pb, "styp");
1182 ffio_wfourcc(pb, "msdh");
1183 avio_wb32(pb, 0); /* minor */
1184 ffio_wfourcc(pb, "msdh");
1185 ffio_wfourcc(pb, "msix");
1188 static void find_index_range(AVFormatContext *s, const char *full_path,
1189 int64_t pos, int *index_length)
1195 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1198 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1199 ff_format_io_close(s, &pb);
1202 ret = avio_read(pb, buf, 8);
1203 ff_format_io_close(s, &pb);
1206 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1208 *index_length = AV_RB32(&buf[0]);
1211 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1212 AVCodecParameters *par,
1213 AVRational *frame_rate)
1217 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1220 extradata = av_malloc(par->extradata_size);
1223 return AVERROR(ENOMEM);
1225 memcpy(extradata, par->extradata, par->extradata_size);
1227 os->ctx->streams[0]->codecpar->extradata = extradata;
1228 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1230 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1235 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1236 DASHContext *c = s->priv_data;
1237 int http_base_proto = ff_is_http_proto(filename);
1239 if (http_base_proto) {
1240 AVIOContext *out = NULL;
1241 AVDictionary *http_opts = NULL;
1243 set_http_options(&http_opts, c);
1244 av_dict_set(&http_opts, "method", "DELETE", 0);
1246 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1247 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1250 av_dict_free(&http_opts);
1251 dashenc_io_close(s, &out, filename);
1252 } else if (unlink(filename) < 0) {
1253 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1257 static int dash_flush(AVFormatContext *s, int final, int stream)
1259 DASHContext *c = s->priv_data;
1262 const char *proto = avio_find_protocol_name(s->url);
1263 int use_rename = proto && !strcmp(proto, "file");
1265 int cur_flush_segment_index = 0, next_exp_index = -1;
1267 cur_flush_segment_index = c->streams[stream].segment_index;
1269 //finding the next segment's expected index, based on the current pts value
1270 if (c->use_template && !c->use_timeline && c->index_correction &&
1271 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1272 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1273 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1274 c->streams[stream].first_pts,
1275 s->streams[stream]->time_base,
1277 next_exp_index = (pts_diff / c->seg_duration) + 1;
1281 for (i = 0; i < s->nb_streams; i++) {
1282 OutputStream *os = &c->streams[i];
1283 AVStream *st = s->streams[i];
1284 int range_length, index_length = 0;
1286 if (!os->packets_written)
1289 // Flush the single stream that got a keyframe right now.
1290 // Flush all audio streams as well, in sync with video keyframes,
1291 // but not the other video streams.
1292 if (stream >= 0 && i != stream) {
1293 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1295 // Make sure we don't flush audio streams multiple times, when
1296 // all video streams are flushed one at a time.
1297 if (c->has_video && os->segment_index > cur_flush_segment_index)
1301 if (!c->single_file) {
1302 if (c->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1303 write_styp(os->ctx->pb);
1305 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1308 ret = flush_dynbuf(os, &range_length);
1311 os->packets_written = 0;
1313 if (c->single_file) {
1314 find_index_range(s, os->full_path, os->pos, &index_length);
1316 dashenc_io_close(s, &os->out, os->temp_path);
1319 ret = avpriv_io_move(os->temp_path, os->full_path);
1325 if (!os->muxer_overhead)
1326 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1328 av_rescale_q(os->max_pts - os->start_pts,
1329 st->time_base, AV_TIME_BASE_Q);
1330 os->total_pkt_size = 0;
1332 if (!os->bit_rate) {
1333 // calculate average bitrate of first segment
1334 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1338 os->bit_rate = bitrate;
1340 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1341 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1343 os->pos += range_length;
1346 if (c->window_size || (final && c->remove_at_exit)) {
1347 for (i = 0; i < s->nb_streams; i++) {
1348 OutputStream *os = &c->streams[i];
1350 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1351 if (final && c->remove_at_exit)
1352 remove = os->nb_segments;
1354 for (j = 0; j < remove; j++) {
1355 char filename[1024];
1356 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1357 dashenc_delete_file(s, filename);
1358 av_free(os->segments[j]);
1360 os->nb_segments -= remove;
1361 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1367 ret = write_manifest(s, final);
1371 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1373 DASHContext *c = s->priv_data;
1374 AVStream *st = s->streams[pkt->stream_index];
1375 OutputStream *os = &c->streams[pkt->stream_index];
1376 int64_t seg_end_duration, elapsed_duration;
1379 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1383 // Fill in a heuristic guess of the packet duration, if none is available.
1384 // The mp4 muxer will do something similar (for the last packet in a fragment)
1385 // if nothing is set (setting it for the other packets doesn't hurt).
1386 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1387 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1388 // so that we know the exact timestamps of fragments.
1389 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1390 pkt->duration = pkt->dts - os->last_dts;
1391 os->last_dts = pkt->dts;
1393 // If forcing the stream to start at 0, the mp4 muxer will set the start
1394 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1395 if (os->first_pts == AV_NOPTS_VALUE &&
1396 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1397 pkt->pts -= pkt->dts;
1401 if (os->first_pts == AV_NOPTS_VALUE)
1402 os->first_pts = pkt->pts;
1403 os->last_pts = pkt->pts;
1405 if (!c->availability_start_time[0])
1406 format_date_now(c->availability_start_time,
1407 sizeof(c->availability_start_time));
1409 if (!os->availability_time_offset && pkt->duration) {
1410 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1412 os->availability_time_offset = ((double) c->seg_duration -
1413 frame_duration) / AV_TIME_BASE;
1416 if (c->use_template && !c->use_timeline) {
1417 elapsed_duration = pkt->pts - os->first_pts;
1418 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1420 elapsed_duration = pkt->pts - os->start_pts;
1421 seg_end_duration = c->seg_duration;
1424 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1425 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1426 av_compare_ts(elapsed_duration, st->time_base,
1427 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1428 int64_t prev_duration = c->last_duration;
1430 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1433 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1437 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1438 if (c->last_duration < prev_duration*9/10 ||
1439 c->last_duration > prev_duration*11/10) {
1440 av_log(s, AV_LOG_WARNING,
1441 "Segment durations differ too much, enable use_timeline "
1442 "and use_template, or keep a stricter keyframe interval\n");
1446 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1450 if (!os->packets_written) {
1451 // If we wrote a previous segment, adjust the start time of the segment
1452 // to the end of the previous one (which is the same as the mp4 muxer
1453 // does). This avoids gaps in the timeline.
1454 if (os->max_pts != AV_NOPTS_VALUE)
1455 os->start_pts = os->max_pts;
1457 os->start_pts = pkt->pts;
1459 if (os->max_pts == AV_NOPTS_VALUE)
1460 os->max_pts = pkt->pts + pkt->duration;
1462 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1463 os->packets_written++;
1464 os->total_pkt_size += pkt->size;
1465 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1468 if (!os->init_range_length)
1469 flush_init_segment(s, os);
1471 //open the output context when the first frame of a segment is ready
1472 if (!c->single_file && os->packets_written == 1) {
1473 AVDictionary *opts = NULL;
1474 const char *proto = avio_find_protocol_name(s->url);
1475 int use_rename = proto && !strcmp(proto, "file");
1476 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1477 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1478 c->media_seg_name, pkt->stream_index,
1479 os->segment_index, os->bit_rate, os->start_pts);
1480 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1482 snprintf(os->temp_path, sizeof(os->temp_path),
1483 use_rename ? "%s.tmp" : "%s", os->full_path);
1484 set_http_options(&opts, c);
1485 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1488 av_dict_free(&opts);
1491 //write out the data immediately in streaming mode
1492 if (c->streaming && c->segment_type == SEGMENT_TYPE_MP4) {
1494 uint8_t *buf = NULL;
1495 if (!os->written_len)
1496 write_styp(os->ctx->pb);
1497 avio_flush(os->ctx->pb);
1498 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1499 avio_write(os->out, buf + os->written_len, len - os->written_len);
1500 os->written_len = len;
1501 avio_flush(os->out);
1507 static int dash_write_trailer(AVFormatContext *s)
1509 DASHContext *c = s->priv_data;
1511 if (s->nb_streams > 0) {
1512 OutputStream *os = &c->streams[0];
1513 // If no segments have been written so far, try to do a crude
1514 // guess of the segment duration
1515 if (!c->last_duration)
1516 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1517 s->streams[0]->time_base,
1519 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1520 s->streams[0]->time_base,
1523 dash_flush(s, 1, -1);
1525 if (c->remove_at_exit) {
1526 char filename[1024];
1528 for (i = 0; i < s->nb_streams; i++) {
1529 OutputStream *os = &c->streams[i];
1530 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1531 dashenc_delete_file(s, filename);
1533 dashenc_delete_file(s, s->url);
1539 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1541 DASHContext *c = s->priv_data;
1542 OutputStream *os = &c->streams[avpkt->stream_index];
1543 AVFormatContext *oc = os->ctx;
1544 if (oc->oformat->check_bitstream) {
1546 AVPacket pkt = *avpkt;
1547 pkt.stream_index = 0;
1548 ret = oc->oformat->check_bitstream(oc, &pkt);
1550 AVStream *st = s->streams[avpkt->stream_index];
1551 AVStream *ost = oc->streams[0];
1552 st->internal->bsfcs = ost->internal->bsfcs;
1553 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1554 ost->internal->bsfcs = NULL;
1555 ost->internal->nb_bsfcs = 0;
1562 #define OFFSET(x) offsetof(DASHContext, x)
1563 #define E AV_OPT_FLAG_ENCODING_PARAM
1564 static const AVOption options[] = {
1565 { "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 },
1566 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1567 { "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 },
1568 #if FF_API_DASH_MIN_SEG_DURATION
1569 { "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 },
1571 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1572 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1573 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1574 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1575 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1576 { "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 },
1577 { "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 },
1578 { "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 },
1579 { "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 },
1580 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1581 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1582 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1583 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1584 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1585 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1586 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1587 { "format_options","set list of options for the container format (mp4/webm) used for dash", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1588 { "dash_segment_type", "set dash segment files type", OFFSET(segment_type), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_MP4 }, 0, SEGMENT_TYPE_NB - 1, E, "segment_type"},
1589 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1590 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1594 static const AVClass dash_class = {
1595 .class_name = "dash muxer",
1596 .item_name = av_default_item_name,
1598 .version = LIBAVUTIL_VERSION_INT,
1601 AVOutputFormat ff_dash_muxer = {
1603 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1604 .extensions = "mpd",
1605 .priv_data_size = sizeof(DASHContext),
1606 .audio_codec = AV_CODEC_ID_AAC,
1607 .video_codec = AV_CODEC_ID_H264,
1608 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1610 .write_header = dash_write_header,
1611 .write_packet = dash_write_packet,
1612 .write_trailer = dash_write_trailer,
1613 .deinit = dash_free,
1614 .check_bitstream = dash_check_bitstream,
1615 .priv_class = &dash_class,