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"
52 SEGMENT_TYPE_AUTO = 0,
58 typedef struct Segment {
61 int range_length, index_length;
67 typedef struct AdaptationSet {
69 enum AVMediaType media_type;
70 AVDictionary *metadata;
71 AVRational min_frame_rate, max_frame_rate;
72 int ambiguous_frame_rate;
75 typedef struct OutputStream {
77 int ctx_inited, as_idx;
81 int64_t init_start_pos, pos;
82 int init_range_length;
83 int nb_segments, segments_size, segment_index;
85 int64_t first_pts, start_pts, max_pts;
86 int64_t last_dts, last_pts;
88 SegmentType segment_type; /* segment type selected for this particular stream */
89 const char *format_name;
90 const char *single_file_name; /* file names selected for this particular stream */
91 const char *init_seg_name;
92 const char *media_seg_name;
99 double availability_time_offset;
104 typedef struct DASHContext {
105 const AVClass *class; /* Class for private options. */
106 char *adaptation_sets;
110 int extra_window_size;
111 #if FF_API_DASH_MIN_SEG_DURATION
112 int min_seg_duration;
114 int64_t seg_duration;
119 OutputStream *streams;
121 int64_t last_duration;
122 int64_t total_duration;
123 char availability_start_time[100];
125 const char *single_file_name; /* file names as specified in options */
126 const char *init_seg_name;
127 const char *media_seg_name;
128 const char *utc_timing_url;
130 const char *user_agent;
133 int master_playlist_created;
134 AVIOContext *mpd_out;
135 AVIOContext *m3u8_out;
138 int index_correction;
139 char *format_options_str;
140 SegmentType segment_type_option; /* segment type as specified in options */
141 int ignore_io_errors;
144 static struct codec_string {
148 { AV_CODEC_ID_VP8, "vp8" },
149 { AV_CODEC_ID_VP9, "vp9" },
150 { AV_CODEC_ID_VORBIS, "vorbis" },
151 { AV_CODEC_ID_OPUS, "opus" },
152 { AV_CODEC_ID_FLAC, "flac" },
156 static struct format_string {
157 SegmentType segment_type;
160 { SEGMENT_TYPE_AUTO, "auto" },
161 { SEGMENT_TYPE_MP4, "mp4" },
162 { SEGMENT_TYPE_WEBM, "webm" },
166 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
167 AVDictionary **options) {
168 DASHContext *c = s->priv_data;
169 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
170 int err = AVERROR_MUXER_NOT_FOUND;
171 if (!*pb || !http_base_proto || !c->http_persistent) {
172 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
173 #if CONFIG_HTTP_PROTOCOL
175 URLContext *http_url_context = ffio_geturlcontext(*pb);
176 av_assert0(http_url_context);
177 err = ff_http_do_new_request(http_url_context, filename);
179 ff_format_io_close(s, pb);
185 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
186 DASHContext *c = s->priv_data;
187 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
192 if (!http_base_proto || !c->http_persistent) {
193 ff_format_io_close(s, pb);
194 #if CONFIG_HTTP_PROTOCOL
196 URLContext *http_url_context = ffio_geturlcontext(*pb);
197 av_assert0(http_url_context);
199 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
204 static const char *get_format_str(SegmentType segment_type) {
206 for (i = 0; i < SEGMENT_TYPE_NB; i++)
207 if (formats[i].segment_type == segment_type)
208 return formats[i].str;
212 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
214 if (segment_type == SEGMENT_TYPE_AUTO) {
215 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
216 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
217 segment_type = SEGMENT_TYPE_WEBM;
219 segment_type = SEGMENT_TYPE_MP4;
226 static int init_segment_types(AVFormatContext *s)
228 DASHContext *c = s->priv_data;
229 int has_mp4_streams = 0;
230 for (int i = 0; i < s->nb_streams; ++i) {
231 OutputStream *os = &c->streams[i];
232 SegmentType segment_type = select_segment_type(
233 c->segment_type_option, s->streams[i]->codecpar->codec_id);
234 os->segment_type = segment_type;
235 os->format_name = get_format_str(segment_type);
236 if (!os->format_name) {
237 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
238 return AVERROR_MUXER_NOT_FOUND;
240 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
243 if (c->hls_playlist && !has_mp4_streams) {
244 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
251 static int check_file_extension(const char *filename, const char *extension) {
253 if (!filename || !extension)
255 dot = strrchr(filename, '.');
256 if (dot && !strcmp(dot + 1, extension))
261 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
262 AVRational *frame_rate, char *str, int size) {
264 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
266 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
267 vpcc.profile, vpcc.level, vpcc.bitdepth);
269 // Default to just vp9 in case of error while finding out profile or level
270 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
271 av_strlcpy(str, "vp9", size);
276 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
277 AVRational *frame_rate, char *str, int size)
279 const AVCodecTag *tags[2] = { NULL, NULL };
283 // common Webm codecs are not part of RFC 6381
284 for (i = 0; codecs[i].id; i++)
285 if (codecs[i].id == par->codec_id) {
286 if (codecs[i].id == AV_CODEC_ID_VP9) {
287 set_vp9_codec_str(s, par, frame_rate, str, size);
289 av_strlcpy(str, codecs[i].str, size);
294 // for codecs part of RFC 6381
295 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
296 tags[0] = ff_codec_movvideo_tags;
297 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
298 tags[0] = ff_codec_movaudio_tags;
302 tag = par->codec_tag;
304 tag = av_codec_get_tag(tags, par->codec_id);
312 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
314 tags[0] = ff_mp4_obj_type;
315 oti = av_codec_get_tag(tags, par->codec_id);
317 av_strlcatf(str, size, ".%02"PRIx32, oti);
321 if (tag == MKTAG('m', 'p', '4', 'a')) {
322 if (par->extradata_size >= 2) {
323 int aot = par->extradata[0] >> 3;
325 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
326 av_strlcatf(str, size, ".%d", aot);
328 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
329 // Unimplemented, should output ProfileLevelIndication as a decimal number
330 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
332 } else if (!strcmp(str, "avc1")) {
333 uint8_t *tmpbuf = NULL;
334 uint8_t *extradata = par->extradata;
335 int extradata_size = par->extradata_size;
338 if (extradata[0] != 1) {
340 if (avio_open_dyn_buf(&pb) < 0)
342 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
343 ffio_free_dyn_buf(&pb);
346 extradata_size = avio_close_dyn_buf(pb, &extradata);
350 if (extradata_size >= 4)
351 av_strlcatf(str, size, ".%02x%02x%02x",
352 extradata[1], extradata[2], extradata[3]);
357 static int flush_dynbuf(OutputStream *os, int *range_length)
362 return AVERROR(EINVAL);
366 av_write_frame(os->ctx, NULL);
367 avio_flush(os->ctx->pb);
370 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
373 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
378 return avio_open_dyn_buf(&os->ctx->pb);
381 static void set_http_options(AVDictionary **options, DASHContext *c)
384 av_dict_set(options, "method", c->method, 0);
386 av_dict_set(options, "user_agent", c->user_agent, 0);
387 if (c->http_persistent)
388 av_dict_set_int(options, "multiple_requests", 1, 0);
390 av_dict_set_int(options, "timeout", c->timeout, 0);
393 static void get_hls_playlist_name(char *playlist_name, int string_size,
394 const char *base_url, int id) {
396 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
398 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
401 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
403 DASHContext *c = s->priv_data;
404 int ret, range_length;
406 ret = flush_dynbuf(os, &range_length);
410 os->pos = os->init_range_length = range_length;
411 if (!c->single_file) {
413 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
414 dashenc_io_close(s, &os->out, filename);
419 static void dash_free(AVFormatContext *s)
421 DASHContext *c = s->priv_data;
425 for (i = 0; i < c->nb_as; i++)
426 av_dict_free(&c->as[i].metadata);
433 for (i = 0; i < s->nb_streams; i++) {
434 OutputStream *os = &c->streams[i];
435 if (os->ctx && os->ctx_inited)
436 av_write_trailer(os->ctx);
437 if (os->ctx && os->ctx->pb)
438 ffio_free_dyn_buf(&os->ctx->pb);
439 ff_format_io_close(s, &os->out);
441 avformat_free_context(os->ctx);
442 for (j = 0; j < os->nb_segments; j++)
443 av_free(os->segments[j]);
444 av_free(os->segments);
445 av_freep(&os->single_file_name);
446 av_freep(&os->init_seg_name);
447 av_freep(&os->media_seg_name);
449 av_freep(&c->streams);
451 ff_format_io_close(s, &c->mpd_out);
452 ff_format_io_close(s, &c->m3u8_out);
455 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
456 int representation_id, int final)
458 DASHContext *c = s->priv_data;
459 int i, start_index = 0, start_number = 1;
460 if (c->window_size) {
461 start_index = FFMAX(os->nb_segments - c->window_size, 0);
462 start_number = FFMAX(os->segment_index - c->window_size, 1);
465 if (c->use_template) {
466 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
467 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
468 if (!c->use_timeline) {
469 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
470 if (c->streaming && os->availability_time_offset)
471 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
472 os->availability_time_offset);
474 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
475 if (c->use_timeline) {
476 int64_t cur_time = 0;
477 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
478 for (i = start_index; i < os->nb_segments; ) {
479 Segment *seg = os->segments[i];
481 avio_printf(out, "\t\t\t\t\t\t<S ");
482 if (i == start_index || seg->time != cur_time) {
483 cur_time = seg->time;
484 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
486 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
487 while (i + repeat + 1 < os->nb_segments &&
488 os->segments[i + repeat + 1]->duration == seg->duration &&
489 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
492 avio_printf(out, "r=\"%d\" ", repeat);
493 avio_printf(out, "/>\n");
495 cur_time += (1 + repeat) * seg->duration;
497 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
499 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
500 } else if (c->single_file) {
501 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
502 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
503 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);
504 for (i = start_index; i < os->nb_segments; i++) {
505 Segment *seg = os->segments[i];
506 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
507 if (seg->index_length)
508 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
509 avio_printf(out, "/>\n");
511 avio_printf(out, "\t\t\t\t</SegmentList>\n");
513 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
514 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
515 for (i = start_index; i < os->nb_segments; i++) {
516 Segment *seg = os->segments[i];
517 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
519 avio_printf(out, "\t\t\t\t</SegmentList>\n");
521 if (c->hls_playlist && start_index < os->nb_segments && os->segment_type == SEGMENT_TYPE_MP4)
523 int timescale = os->ctx->streams[0]->time_base.den;
524 char temp_filename_hls[1024];
525 char filename_hls[1024];
526 AVDictionary *http_opts = NULL;
527 int target_duration = 0;
529 const char *proto = avio_find_protocol_name(c->dirname);
530 int use_rename = proto && !strcmp(proto, "file");
532 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
533 c->dirname, representation_id);
535 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
537 set_http_options(&http_opts, c);
538 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
539 av_dict_free(&http_opts);
541 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename_hls);
544 for (i = start_index; i < os->nb_segments; i++) {
545 Segment *seg = os->segments[i];
546 double duration = (double) seg->duration / timescale;
547 if (target_duration <= duration)
548 target_duration = lrint(duration);
551 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
552 start_number, PLAYLIST_TYPE_NONE);
554 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
555 os->init_range_length, os->init_start_pos);
557 for (i = start_index; i < os->nb_segments; i++) {
558 Segment *seg = os->segments[i];
559 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
560 (double) seg->duration / timescale, 0,
561 seg->range_length, seg->start_pos, NULL,
562 c->single_file ? os->initfile : seg->file,
565 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
570 ff_hls_write_end_list(c->m3u8_out);
572 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
575 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
576 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
582 static char *xmlescape(const char *str) {
583 int outlen = strlen(str)*3/2 + 6;
584 char *out = av_realloc(NULL, outlen + 1);
588 for (; *str; str++) {
589 if (pos + 6 > outlen) {
591 outlen = 2 * outlen + 6;
592 tmp = av_realloc(out, outlen + 1);
600 memcpy(&out[pos], "&", 5);
602 } else if (*str == '<') {
603 memcpy(&out[pos], "<", 4);
605 } else if (*str == '>') {
606 memcpy(&out[pos], ">", 4);
608 } else if (*str == '\'') {
609 memcpy(&out[pos], "'", 6);
611 } else if (*str == '\"') {
612 memcpy(&out[pos], """, 6);
622 static void write_time(AVIOContext *out, int64_t time)
624 int seconds = time / AV_TIME_BASE;
625 int fractions = time % AV_TIME_BASE;
626 int minutes = seconds / 60;
627 int hours = minutes / 60;
630 avio_printf(out, "PT");
632 avio_printf(out, "%dH", hours);
633 if (hours || minutes)
634 avio_printf(out, "%dM", minutes);
635 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
638 static void format_date_now(char *buf, int size)
640 time_t t = time(NULL);
641 struct tm *ptm, tmbuf;
642 ptm = gmtime_r(&t, &tmbuf);
644 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
649 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
652 DASHContext *c = s->priv_data;
653 AdaptationSet *as = &c->as[as_index];
654 AVDictionaryEntry *lang, *role;
657 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
658 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
659 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)
660 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
661 lang = av_dict_get(as->metadata, "language", NULL, 0);
663 avio_printf(out, " lang=\"%s\"", lang->value);
664 avio_printf(out, ">\n");
666 role = av_dict_get(as->metadata, "role", NULL, 0);
668 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
670 for (i = 0; i < s->nb_streams; i++) {
671 OutputStream *os = &c->streams[i];
672 char bandwidth_str[64] = {'\0'};
674 if (os->as_idx - 1 != as_index)
677 if (os->bit_rate > 0)
678 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
681 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
682 AVStream *st = s->streams[i];
683 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
684 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
685 if (st->avg_frame_rate.num)
686 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
687 avio_printf(out, ">\n");
689 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
690 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
691 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
692 s->streams[i]->codecpar->channels);
694 output_segment_list(os, out, s, i, final);
695 avio_printf(out, "\t\t\t</Representation>\n");
697 avio_printf(out, "\t\t</AdaptationSet>\n");
702 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
704 DASHContext *c = s->priv_data;
706 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
708 return AVERROR(ENOMEM);
712 *as = &c->as[c->nb_as - 1];
713 memset(*as, 0, sizeof(**as));
714 (*as)->media_type = type;
719 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
721 DASHContext *c = s->priv_data;
722 AdaptationSet *as = &c->as[as_idx - 1];
723 OutputStream *os = &c->streams[i];
725 if (as->media_type != s->streams[i]->codecpar->codec_type) {
726 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
727 return AVERROR(EINVAL);
728 } else if (os->as_idx) {
729 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
730 return AVERROR(EINVAL);
737 static int parse_adaptation_sets(AVFormatContext *s)
739 DASHContext *c = s->priv_data;
740 const char *p = c->adaptation_sets;
741 enum { new_set, parse_id, parsing_streams } state;
745 // default: one AdaptationSet for each stream
747 for (i = 0; i < s->nb_streams; i++) {
748 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
750 snprintf(as->id, sizeof(as->id), "%d", i);
752 c->streams[i].as_idx = c->nb_as;
757 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
763 } else if (state == new_set && av_strstart(p, "id=", &p)) {
765 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
769 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
775 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
776 state = parsing_streams;
777 } else if (state == parsing_streams) {
778 AdaptationSet *as = &c->as[c->nb_as - 1];
779 char idx_str[8], *end_str;
781 n = strcspn(p, " ,");
782 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
785 // if value is "a" or "v", map all streams of that type
786 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
787 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
788 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
790 for (i = 0; i < s->nb_streams; i++) {
791 if (s->streams[i]->codecpar->codec_type != type)
794 as->media_type = s->streams[i]->codecpar->codec_type;
796 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
799 } else { // select single stream
800 i = strtol(idx_str, &end_str, 10);
801 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
802 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
803 return AVERROR(EINVAL);
805 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
807 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
808 as->media_type = s->streams[i]->codecpar->codec_type;
811 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
820 return AVERROR(EINVAL);
825 // check for unassigned streams
826 for (i = 0; i < s->nb_streams; i++) {
827 OutputStream *os = &c->streams[i];
829 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
830 return AVERROR(EINVAL);
836 static int write_manifest(AVFormatContext *s, int final)
838 DASHContext *c = s->priv_data;
840 char temp_filename[1024];
842 const char *proto = avio_find_protocol_name(s->url);
843 int use_rename = proto && !strcmp(proto, "file");
844 static unsigned int warned_non_file = 0;
845 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
846 AVDictionary *opts = NULL;
848 if (!use_rename && !warned_non_file++)
849 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
851 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
852 set_http_options(&opts, c);
853 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
856 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
857 return c->ignore_io_errors ? 0 : ret;
860 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
861 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
862 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
863 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
864 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
865 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
866 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
868 avio_printf(out, "\tmediaPresentationDuration=\"");
869 write_time(out, c->total_duration);
870 avio_printf(out, "\"\n");
872 int64_t update_period = c->last_duration / AV_TIME_BASE;
874 if (c->use_template && !c->use_timeline)
876 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
877 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
878 if (c->availability_start_time[0])
879 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
880 format_date_now(now_str, sizeof(now_str));
882 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
883 if (c->window_size && c->use_template) {
884 avio_printf(out, "\ttimeShiftBufferDepth=\"");
885 write_time(out, c->last_duration * c->window_size);
886 avio_printf(out, "\"\n");
889 avio_printf(out, "\tminBufferTime=\"");
890 write_time(out, c->last_duration * 2);
891 avio_printf(out, "\">\n");
892 avio_printf(out, "\t<ProgramInformation>\n");
894 char *escaped = xmlescape(title->value);
895 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
898 avio_printf(out, "\t</ProgramInformation>\n");
900 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
901 OutputStream *os = &c->streams[0];
902 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
903 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
904 avio_printf(out, "\t<Period id=\"0\" start=\"");
905 write_time(out, start_time);
906 avio_printf(out, "\">\n");
908 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
911 for (i = 0; i < c->nb_as; i++) {
912 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
915 avio_printf(out, "\t</Period>\n");
917 if (c->utc_timing_url)
918 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
920 avio_printf(out, "</MPD>\n");
922 dashenc_io_close(s, &c->mpd_out, temp_filename);
925 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
929 if (c->hls_playlist && !c->master_playlist_created) {
930 char filename_hls[1024];
931 const char *audio_group = "A1";
932 char audio_codec_str[128] = "\0";
934 int max_audio_bitrate = 0;
937 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
939 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
941 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
943 set_http_options(&opts, c);
944 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
947 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
948 return c->ignore_io_errors ? 0 : ret;
951 ff_hls_write_playlist_version(c->m3u8_out, 7);
953 for (i = 0; i < s->nb_streams; i++) {
954 char playlist_file[64];
955 AVStream *st = s->streams[i];
956 OutputStream *os = &c->streams[i];
957 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
959 if (os->segment_type != SEGMENT_TYPE_MP4)
961 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
962 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
963 playlist_file, i, is_default);
964 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
965 os->muxer_overhead, max_audio_bitrate);
966 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
967 if (strlen(audio_codec_str))
968 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
969 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
974 for (i = 0; i < s->nb_streams; i++) {
975 char playlist_file[64];
977 AVStream *st = s->streams[i];
978 OutputStream *os = &c->streams[i];
980 char *codec_str_ptr = NULL;
981 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
982 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
984 if (os->segment_type != SEGMENT_TYPE_MP4)
986 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
987 if (max_audio_bitrate) {
988 agroup = (char *)audio_group;
989 stream_bitrate += max_audio_bitrate;
990 av_strlcat(codec_str, ",", sizeof(codec_str));
991 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
993 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
994 codec_str_ptr = codec_str;
996 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
997 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
998 playlist_file, agroup,
999 codec_str_ptr, NULL);
1001 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1003 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
1005 c->master_playlist_created = 1;
1011 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1013 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1015 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1019 static int dash_init(AVFormatContext *s)
1021 DASHContext *c = s->priv_data;
1024 char basename[1024];
1026 if (c->single_file_name)
1029 c->use_template = 0;
1031 #if FF_API_DASH_MIN_SEG_DURATION
1032 if (c->min_seg_duration != 5000000) {
1033 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1034 c->seg_duration = c->min_seg_duration;
1038 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1039 ptr = strrchr(c->dirname, '/');
1041 av_strlcpy(basename, &ptr[1], sizeof(basename));
1044 c->dirname[0] = '\0';
1045 av_strlcpy(basename, s->url, sizeof(basename));
1048 ptr = strrchr(basename, '.');
1052 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1054 return AVERROR(ENOMEM);
1056 if ((ret = parse_adaptation_sets(s)) < 0)
1059 if ((ret = init_segment_types(s)) < 0)
1062 for (i = 0; i < s->nb_streams; i++) {
1063 OutputStream *os = &c->streams[i];
1064 AdaptationSet *as = &c->as[os->as_idx - 1];
1065 AVFormatContext *ctx;
1067 AVDictionary *opts = NULL;
1068 char filename[1024];
1070 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1071 if (!os->bit_rate) {
1072 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1073 AV_LOG_ERROR : AV_LOG_WARNING;
1074 av_log(s, level, "No bit rate set for stream %d\n", i);
1075 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1076 return AVERROR(EINVAL);
1079 // copy AdaptationSet language and role from stream metadata
1080 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1081 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1083 ctx = avformat_alloc_context();
1085 return AVERROR(ENOMEM);
1087 if (c->init_seg_name) {
1088 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->format_name);
1089 if (!os->init_seg_name)
1090 return AVERROR(ENOMEM);
1092 if (c->media_seg_name) {
1093 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->format_name);
1094 if (!os->media_seg_name)
1095 return AVERROR(ENOMEM);
1097 if (c->single_file_name) {
1098 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->format_name);
1099 if (!os->single_file_name)
1100 return AVERROR(ENOMEM);
1103 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1104 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1105 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1106 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1107 av_log(s, AV_LOG_WARNING,
1108 "One or many segment file names doesn't end with .webm. "
1109 "Override -init_seg_name and/or -media_seg_name and/or "
1110 "-single_file_name to end with the extension .webm\n");
1114 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1116 return AVERROR_MUXER_NOT_FOUND;
1118 ctx->interrupt_callback = s->interrupt_callback;
1119 ctx->opaque = s->opaque;
1120 ctx->io_close = s->io_close;
1121 ctx->io_open = s->io_open;
1122 ctx->strict_std_compliance = s->strict_std_compliance;
1124 if (!(st = avformat_new_stream(ctx, NULL)))
1125 return AVERROR(ENOMEM);
1126 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1127 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1128 st->time_base = s->streams[i]->time_base;
1129 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1130 ctx->avoid_negative_ts = s->avoid_negative_ts;
1131 ctx->flags = s->flags;
1133 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1136 if (c->single_file) {
1137 if (os->single_file_name)
1138 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1140 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1142 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1144 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1145 set_http_options(&opts, c);
1146 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1147 av_dict_free(&opts);
1150 os->init_start_pos = 0;
1152 if (c->format_options_str) {
1153 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1158 if (os->segment_type == SEGMENT_TYPE_MP4) {
1160 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+global_sidx", 0);
1162 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1164 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1165 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1166 av_dict_set_int(&opts, "dash", 1, 0);
1167 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1168 av_dict_set_int(&opts, "live", 1, 0);
1170 ret = avformat_init_output(ctx, &opts);
1171 av_dict_free(&opts);
1175 avio_flush(ctx->pb);
1177 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1179 s->streams[i]->time_base = st->time_base;
1180 // If the muxer wants to shift timestamps, request to have them shifted
1181 // already before being handed to this muxer, so we don't have mismatches
1182 // between the MPD and the actual segments.
1183 s->avoid_negative_ts = ctx->avoid_negative_ts;
1184 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1185 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1186 if (avg_frame_rate.num > 0) {
1187 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1188 as->min_frame_rate = avg_frame_rate;
1189 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1190 as->max_frame_rate = avg_frame_rate;
1192 as->ambiguous_frame_rate = 1;
1197 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1198 sizeof(os->codec_str));
1199 os->first_pts = AV_NOPTS_VALUE;
1200 os->max_pts = AV_NOPTS_VALUE;
1201 os->last_dts = AV_NOPTS_VALUE;
1202 os->segment_index = 1;
1205 if (!c->has_video && c->seg_duration <= 0) {
1206 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1207 return AVERROR(EINVAL);
1212 static int dash_write_header(AVFormatContext *s)
1214 DASHContext *c = s->priv_data;
1216 for (i = 0; i < s->nb_streams; i++) {
1217 OutputStream *os = &c->streams[i];
1218 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1221 // Flush init segment
1222 // Only for WebM segment, since for mp4 delay_moov is set and
1223 // the init segment is thus flushed after the first packets.
1224 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1225 (ret = flush_init_segment(s, os)) < 0)
1231 static int add_segment(OutputStream *os, const char *file,
1232 int64_t time, int64_t duration,
1233 int64_t start_pos, int64_t range_length,
1234 int64_t index_length, int next_exp_index)
1238 if (os->nb_segments >= os->segments_size) {
1239 os->segments_size = (os->segments_size + 1) * 2;
1240 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1241 os->segments_size)) < 0) {
1242 os->segments_size = 0;
1243 os->nb_segments = 0;
1247 seg = av_mallocz(sizeof(*seg));
1249 return AVERROR(ENOMEM);
1250 av_strlcpy(seg->file, file, sizeof(seg->file));
1252 seg->duration = duration;
1253 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1254 seg->duration += seg->time;
1257 seg->start_pos = start_pos;
1258 seg->range_length = range_length;
1259 seg->index_length = index_length;
1260 os->segments[os->nb_segments++] = seg;
1261 os->segment_index++;
1262 //correcting the segment index if it has fallen behind the expected value
1263 if (os->segment_index < next_exp_index) {
1264 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1265 file, os->segment_index, next_exp_index);
1266 os->segment_index = next_exp_index;
1271 static void write_styp(AVIOContext *pb)
1274 ffio_wfourcc(pb, "styp");
1275 ffio_wfourcc(pb, "msdh");
1276 avio_wb32(pb, 0); /* minor */
1277 ffio_wfourcc(pb, "msdh");
1278 ffio_wfourcc(pb, "msix");
1281 static void find_index_range(AVFormatContext *s, const char *full_path,
1282 int64_t pos, int *index_length)
1288 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1291 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1292 ff_format_io_close(s, &pb);
1295 ret = avio_read(pb, buf, 8);
1296 ff_format_io_close(s, &pb);
1299 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1301 *index_length = AV_RB32(&buf[0]);
1304 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1305 AVCodecParameters *par,
1306 AVRational *frame_rate)
1310 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1313 extradata = av_malloc(par->extradata_size);
1316 return AVERROR(ENOMEM);
1318 memcpy(extradata, par->extradata, par->extradata_size);
1320 os->ctx->streams[0]->codecpar->extradata = extradata;
1321 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1323 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1328 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1329 DASHContext *c = s->priv_data;
1330 int http_base_proto = ff_is_http_proto(filename);
1332 if (http_base_proto) {
1333 AVIOContext *out = NULL;
1334 AVDictionary *http_opts = NULL;
1336 set_http_options(&http_opts, c);
1337 av_dict_set(&http_opts, "method", "DELETE", 0);
1339 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1340 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1343 av_dict_free(&http_opts);
1344 ff_format_io_close(s, &out);
1345 } else if (unlink(filename) < 0) {
1346 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1350 static int dash_flush(AVFormatContext *s, int final, int stream)
1352 DASHContext *c = s->priv_data;
1355 const char *proto = avio_find_protocol_name(s->url);
1356 int use_rename = proto && !strcmp(proto, "file");
1358 int cur_flush_segment_index = 0, next_exp_index = -1;
1360 cur_flush_segment_index = c->streams[stream].segment_index;
1362 //finding the next segment's expected index, based on the current pts value
1363 if (c->use_template && !c->use_timeline && c->index_correction &&
1364 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1365 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1366 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1367 c->streams[stream].first_pts,
1368 s->streams[stream]->time_base,
1370 next_exp_index = (pts_diff / c->seg_duration) + 1;
1374 for (i = 0; i < s->nb_streams; i++) {
1375 OutputStream *os = &c->streams[i];
1376 AVStream *st = s->streams[i];
1377 int range_length, index_length = 0;
1379 if (!os->packets_written)
1382 // Flush the single stream that got a keyframe right now.
1383 // Flush all audio streams as well, in sync with video keyframes,
1384 // but not the other video streams.
1385 if (stream >= 0 && i != stream) {
1386 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1388 // Make sure we don't flush audio streams multiple times, when
1389 // all video streams are flushed one at a time.
1390 if (c->has_video && os->segment_index > cur_flush_segment_index)
1394 if (!c->single_file) {
1395 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1396 write_styp(os->ctx->pb);
1398 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1401 ret = flush_dynbuf(os, &range_length);
1404 os->packets_written = 0;
1406 if (c->single_file) {
1407 find_index_range(s, os->full_path, os->pos, &index_length);
1409 dashenc_io_close(s, &os->out, os->temp_path);
1412 ret = avpriv_io_move(os->temp_path, os->full_path);
1418 if (!os->muxer_overhead)
1419 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1421 av_rescale_q(os->max_pts - os->start_pts,
1422 st->time_base, AV_TIME_BASE_Q);
1423 os->total_pkt_size = 0;
1425 if (!os->bit_rate) {
1426 // calculate average bitrate of first segment
1427 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1431 os->bit_rate = bitrate;
1433 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1434 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1436 os->pos += range_length;
1439 if (c->window_size || (final && c->remove_at_exit)) {
1440 for (i = 0; i < s->nb_streams; i++) {
1441 OutputStream *os = &c->streams[i];
1443 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1444 if (final && c->remove_at_exit)
1445 remove = os->nb_segments;
1447 for (j = 0; j < remove; j++) {
1448 char filename[1024];
1449 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1450 dashenc_delete_file(s, filename);
1451 av_free(os->segments[j]);
1453 os->nb_segments -= remove;
1454 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1460 ret = write_manifest(s, final);
1464 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1466 DASHContext *c = s->priv_data;
1467 AVStream *st = s->streams[pkt->stream_index];
1468 OutputStream *os = &c->streams[pkt->stream_index];
1469 int64_t seg_end_duration, elapsed_duration;
1472 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1476 // Fill in a heuristic guess of the packet duration, if none is available.
1477 // The mp4 muxer will do something similar (for the last packet in a fragment)
1478 // if nothing is set (setting it for the other packets doesn't hurt).
1479 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1480 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1481 // so that we know the exact timestamps of fragments.
1482 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1483 pkt->duration = pkt->dts - os->last_dts;
1484 os->last_dts = pkt->dts;
1486 // If forcing the stream to start at 0, the mp4 muxer will set the start
1487 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1488 if (os->first_pts == AV_NOPTS_VALUE &&
1489 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1490 pkt->pts -= pkt->dts;
1494 if (os->first_pts == AV_NOPTS_VALUE)
1495 os->first_pts = pkt->pts;
1496 os->last_pts = pkt->pts;
1498 if (!c->availability_start_time[0])
1499 format_date_now(c->availability_start_time,
1500 sizeof(c->availability_start_time));
1502 if (!os->availability_time_offset && pkt->duration) {
1503 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1505 os->availability_time_offset = ((double) c->seg_duration -
1506 frame_duration) / AV_TIME_BASE;
1509 if (c->use_template && !c->use_timeline) {
1510 elapsed_duration = pkt->pts - os->first_pts;
1511 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1513 elapsed_duration = pkt->pts - os->start_pts;
1514 seg_end_duration = c->seg_duration;
1517 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1518 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1519 av_compare_ts(elapsed_duration, st->time_base,
1520 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1521 int64_t prev_duration = c->last_duration;
1523 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1526 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1530 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1531 if (c->last_duration < prev_duration*9/10 ||
1532 c->last_duration > prev_duration*11/10) {
1533 av_log(s, AV_LOG_WARNING,
1534 "Segment durations differ too much, enable use_timeline "
1535 "and use_template, or keep a stricter keyframe interval\n");
1539 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1543 if (!os->packets_written) {
1544 // If we wrote a previous segment, adjust the start time of the segment
1545 // to the end of the previous one (which is the same as the mp4 muxer
1546 // does). This avoids gaps in the timeline.
1547 if (os->max_pts != AV_NOPTS_VALUE)
1548 os->start_pts = os->max_pts;
1550 os->start_pts = pkt->pts;
1552 if (os->max_pts == AV_NOPTS_VALUE)
1553 os->max_pts = pkt->pts + pkt->duration;
1555 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1556 os->packets_written++;
1557 os->total_pkt_size += pkt->size;
1558 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1561 if (!os->init_range_length)
1562 flush_init_segment(s, os);
1564 //open the output context when the first frame of a segment is ready
1565 if (!c->single_file && os->packets_written == 1) {
1566 AVDictionary *opts = NULL;
1567 const char *proto = avio_find_protocol_name(s->url);
1568 int use_rename = proto && !strcmp(proto, "file");
1569 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1570 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1571 os->media_seg_name, pkt->stream_index,
1572 os->segment_index, os->bit_rate, os->start_pts);
1573 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1575 snprintf(os->temp_path, sizeof(os->temp_path),
1576 use_rename ? "%s.tmp" : "%s", os->full_path);
1577 set_http_options(&opts, c);
1578 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1579 av_dict_free(&opts);
1581 return c->ignore_io_errors ? 0 : ret;
1585 //write out the data immediately in streaming mode
1586 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1588 uint8_t *buf = NULL;
1589 if (!os->written_len)
1590 write_styp(os->ctx->pb);
1591 avio_flush(os->ctx->pb);
1592 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1594 avio_write(os->out, buf + os->written_len, len - os->written_len);
1595 avio_flush(os->out);
1597 os->written_len = len;
1603 static int dash_write_trailer(AVFormatContext *s)
1605 DASHContext *c = s->priv_data;
1607 if (s->nb_streams > 0) {
1608 OutputStream *os = &c->streams[0];
1609 // If no segments have been written so far, try to do a crude
1610 // guess of the segment duration
1611 if (!c->last_duration)
1612 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1613 s->streams[0]->time_base,
1615 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1616 s->streams[0]->time_base,
1619 dash_flush(s, 1, -1);
1621 if (c->remove_at_exit) {
1622 char filename[1024];
1624 for (i = 0; i < s->nb_streams; i++) {
1625 OutputStream *os = &c->streams[i];
1626 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1627 dashenc_delete_file(s, filename);
1629 dashenc_delete_file(s, s->url);
1631 if (c->hls_playlist && c->master_playlist_created) {
1632 for (i = 0; i < s->nb_streams; i++) {
1633 OutputStream *os = &c->streams[i];
1634 if (os->segment_type == SEGMENT_TYPE_MP4) {
1635 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
1636 dashenc_delete_file(s, filename);
1639 snprintf(filename, sizeof(filename), "%smaster.m3u8", c->dirname);
1640 dashenc_delete_file(s, filename);
1647 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1649 DASHContext *c = s->priv_data;
1650 OutputStream *os = &c->streams[avpkt->stream_index];
1651 AVFormatContext *oc = os->ctx;
1652 if (oc->oformat->check_bitstream) {
1654 AVPacket pkt = *avpkt;
1655 pkt.stream_index = 0;
1656 ret = oc->oformat->check_bitstream(oc, &pkt);
1658 AVStream *st = s->streams[avpkt->stream_index];
1659 AVStream *ost = oc->streams[0];
1660 st->internal->bsfcs = ost->internal->bsfcs;
1661 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1662 ost->internal->bsfcs = NULL;
1663 ost->internal->nb_bsfcs = 0;
1670 #define OFFSET(x) offsetof(DASHContext, x)
1671 #define E AV_OPT_FLAG_ENCODING_PARAM
1672 static const AVOption options[] = {
1673 { "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 },
1674 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1675 { "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 },
1676 #if FF_API_DASH_MIN_SEG_DURATION
1677 { "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 },
1679 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1680 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1681 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1682 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1683 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1684 { "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 },
1685 { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.$ext$"}, 0, 0, E },
1686 { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.$ext$"}, 0, 0, E },
1687 { "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 },
1688 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1689 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1690 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1691 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1692 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1693 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1694 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1695 { "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},
1696 { "dash_segment_type", "set dash segment files type", OFFSET(segment_type_option), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_AUTO }, 0, SEGMENT_TYPE_NB - 1, E, "segment_type"},
1697 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1698 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1699 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1700 { "ignore_io_errors", "Ignore IO errors during open and write. Useful for long-duration runs with network output", OFFSET(ignore_io_errors), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1704 static const AVClass dash_class = {
1705 .class_name = "dash muxer",
1706 .item_name = av_default_item_name,
1708 .version = LIBAVUTIL_VERSION_INT,
1711 AVOutputFormat ff_dash_muxer = {
1713 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1714 .extensions = "mpd",
1715 .priv_data_size = sizeof(DASHContext),
1716 .audio_codec = AV_CODEC_ID_AAC,
1717 .video_codec = AV_CODEC_ID_H264,
1718 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1720 .write_header = dash_write_header,
1721 .write_packet = dash_write_packet,
1722 .write_trailer = dash_write_trailer,
1723 .deinit = dash_free,
1724 .check_bitstream = dash_check_bitstream,
1725 .priv_class = &dash_class,