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 */
143 static struct codec_string {
147 { AV_CODEC_ID_VP8, "vp8" },
148 { AV_CODEC_ID_VP9, "vp9" },
149 { AV_CODEC_ID_VORBIS, "vorbis" },
150 { AV_CODEC_ID_OPUS, "opus" },
151 { AV_CODEC_ID_FLAC, "flac" },
155 static struct format_string {
156 SegmentType segment_type;
159 { SEGMENT_TYPE_AUTO, "auto" },
160 { SEGMENT_TYPE_MP4, "mp4" },
161 { SEGMENT_TYPE_WEBM, "webm" },
165 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
166 AVDictionary **options) {
167 DASHContext *c = s->priv_data;
168 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
169 int err = AVERROR_MUXER_NOT_FOUND;
170 if (!*pb || !http_base_proto || !c->http_persistent) {
171 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
172 #if CONFIG_HTTP_PROTOCOL
174 URLContext *http_url_context = ffio_geturlcontext(*pb);
175 av_assert0(http_url_context);
176 err = ff_http_do_new_request(http_url_context, filename);
178 ff_format_io_close(s, pb);
184 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
185 DASHContext *c = s->priv_data;
186 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
191 if (!http_base_proto || !c->http_persistent) {
192 ff_format_io_close(s, pb);
193 #if CONFIG_HTTP_PROTOCOL
195 URLContext *http_url_context = ffio_geturlcontext(*pb);
196 av_assert0(http_url_context);
198 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
203 static const char *get_format_str(SegmentType segment_type) {
205 for (i = 0; i < SEGMENT_TYPE_NB; i++)
206 if (formats[i].segment_type == segment_type)
207 return formats[i].str;
211 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
213 if (segment_type == SEGMENT_TYPE_AUTO) {
214 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
215 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
216 segment_type = SEGMENT_TYPE_WEBM;
218 segment_type = SEGMENT_TYPE_MP4;
225 static int init_segment_types(AVFormatContext *s)
227 DASHContext *c = s->priv_data;
228 int has_mp4_streams = 0;
229 for (int i = 0; i < s->nb_streams; ++i) {
230 OutputStream *os = &c->streams[i];
231 SegmentType segment_type = select_segment_type(
232 c->segment_type_option, s->streams[i]->codecpar->codec_id);
233 os->segment_type = segment_type;
234 os->format_name = get_format_str(segment_type);
235 if (!os->format_name) {
236 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
237 return AVERROR_MUXER_NOT_FOUND;
239 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
242 if (c->hls_playlist && !has_mp4_streams) {
243 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
250 static int check_file_extension(const char *filename, const char *extension) {
252 if (!filename || !extension)
254 dot = strrchr(filename, '.');
255 if (dot && !strcmp(dot + 1, extension))
260 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
261 AVRational *frame_rate, char *str, int size) {
263 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
265 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
266 vpcc.profile, vpcc.level, vpcc.bitdepth);
268 // Default to just vp9 in case of error while finding out profile or level
269 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
270 av_strlcpy(str, "vp9", size);
275 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
276 AVRational *frame_rate, char *str, int size)
278 const AVCodecTag *tags[2] = { NULL, NULL };
282 // common Webm codecs are not part of RFC 6381
283 for (i = 0; codecs[i].id; i++)
284 if (codecs[i].id == par->codec_id) {
285 if (codecs[i].id == AV_CODEC_ID_VP9) {
286 set_vp9_codec_str(s, par, frame_rate, str, size);
288 av_strlcpy(str, codecs[i].str, size);
293 // for codecs part of RFC 6381
294 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
295 tags[0] = ff_codec_movvideo_tags;
296 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
297 tags[0] = ff_codec_movaudio_tags;
301 tag = par->codec_tag;
303 tag = av_codec_get_tag(tags, par->codec_id);
311 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
313 tags[0] = ff_mp4_obj_type;
314 oti = av_codec_get_tag(tags, par->codec_id);
316 av_strlcatf(str, size, ".%02"PRIx32, oti);
320 if (tag == MKTAG('m', 'p', '4', 'a')) {
321 if (par->extradata_size >= 2) {
322 int aot = par->extradata[0] >> 3;
324 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
325 av_strlcatf(str, size, ".%d", aot);
327 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
328 // Unimplemented, should output ProfileLevelIndication as a decimal number
329 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
331 } else if (!strcmp(str, "avc1")) {
332 uint8_t *tmpbuf = NULL;
333 uint8_t *extradata = par->extradata;
334 int extradata_size = par->extradata_size;
337 if (extradata[0] != 1) {
339 if (avio_open_dyn_buf(&pb) < 0)
341 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
342 ffio_free_dyn_buf(&pb);
345 extradata_size = avio_close_dyn_buf(pb, &extradata);
349 if (extradata_size >= 4)
350 av_strlcatf(str, size, ".%02x%02x%02x",
351 extradata[1], extradata[2], extradata[3]);
356 static int flush_dynbuf(OutputStream *os, int *range_length)
361 return AVERROR(EINVAL);
365 av_write_frame(os->ctx, NULL);
366 avio_flush(os->ctx->pb);
369 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
372 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
377 return avio_open_dyn_buf(&os->ctx->pb);
380 static void set_http_options(AVDictionary **options, DASHContext *c)
383 av_dict_set(options, "method", c->method, 0);
385 av_dict_set(options, "user_agent", c->user_agent, 0);
386 if (c->http_persistent)
387 av_dict_set_int(options, "multiple_requests", 1, 0);
389 av_dict_set_int(options, "timeout", c->timeout, 0);
392 static void get_hls_playlist_name(char *playlist_name, int string_size,
393 const char *base_url, int id) {
395 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
397 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
400 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
402 DASHContext *c = s->priv_data;
403 int ret, range_length;
405 ret = flush_dynbuf(os, &range_length);
409 os->pos = os->init_range_length = range_length;
410 if (!c->single_file) {
412 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
413 dashenc_io_close(s, &os->out, filename);
418 static void dash_free(AVFormatContext *s)
420 DASHContext *c = s->priv_data;
424 for (i = 0; i < c->nb_as; i++)
425 av_dict_free(&c->as[i].metadata);
432 for (i = 0; i < s->nb_streams; i++) {
433 OutputStream *os = &c->streams[i];
434 if (os->ctx && os->ctx_inited)
435 av_write_trailer(os->ctx);
436 if (os->ctx && os->ctx->pb)
437 ffio_free_dyn_buf(&os->ctx->pb);
438 ff_format_io_close(s, &os->out);
440 avformat_free_context(os->ctx);
441 for (j = 0; j < os->nb_segments; j++)
442 av_free(os->segments[j]);
443 av_free(os->segments);
444 av_freep(&os->single_file_name);
445 av_freep(&os->init_seg_name);
446 av_freep(&os->media_seg_name);
448 av_freep(&c->streams);
450 ff_format_io_close(s, &c->mpd_out);
451 ff_format_io_close(s, &c->m3u8_out);
454 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
455 int representation_id, int final)
457 DASHContext *c = s->priv_data;
458 int i, start_index = 0, start_number = 1;
459 if (c->window_size) {
460 start_index = FFMAX(os->nb_segments - c->window_size, 0);
461 start_number = FFMAX(os->segment_index - c->window_size, 1);
464 if (c->use_template) {
465 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
466 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
467 if (!c->use_timeline) {
468 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
469 if (c->streaming && os->availability_time_offset)
470 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
471 os->availability_time_offset);
473 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
474 if (c->use_timeline) {
475 int64_t cur_time = 0;
476 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
477 for (i = start_index; i < os->nb_segments; ) {
478 Segment *seg = os->segments[i];
480 avio_printf(out, "\t\t\t\t\t\t<S ");
481 if (i == start_index || seg->time != cur_time) {
482 cur_time = seg->time;
483 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
485 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
486 while (i + repeat + 1 < os->nb_segments &&
487 os->segments[i + repeat + 1]->duration == seg->duration &&
488 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
491 avio_printf(out, "r=\"%d\" ", repeat);
492 avio_printf(out, "/>\n");
494 cur_time += (1 + repeat) * seg->duration;
496 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
498 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
499 } else if (c->single_file) {
500 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
501 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
502 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);
503 for (i = start_index; i < os->nb_segments; i++) {
504 Segment *seg = os->segments[i];
505 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
506 if (seg->index_length)
507 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
508 avio_printf(out, "/>\n");
510 avio_printf(out, "\t\t\t\t</SegmentList>\n");
512 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
513 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
514 for (i = start_index; i < os->nb_segments; i++) {
515 Segment *seg = os->segments[i];
516 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
518 avio_printf(out, "\t\t\t\t</SegmentList>\n");
520 if (c->hls_playlist && start_index < os->nb_segments && os->segment_type == SEGMENT_TYPE_MP4)
522 int timescale = os->ctx->streams[0]->time_base.den;
523 char temp_filename_hls[1024];
524 char filename_hls[1024];
525 AVDictionary *http_opts = NULL;
526 int target_duration = 0;
528 const char *proto = avio_find_protocol_name(c->dirname);
529 int use_rename = proto && !strcmp(proto, "file");
531 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
532 c->dirname, representation_id);
534 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
536 set_http_options(&http_opts, c);
537 dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
538 av_dict_free(&http_opts);
539 for (i = start_index; i < os->nb_segments; i++) {
540 Segment *seg = os->segments[i];
541 double duration = (double) seg->duration / timescale;
542 if (target_duration <= duration)
543 target_duration = lrint(duration);
546 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
547 start_number, PLAYLIST_TYPE_NONE);
549 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
550 os->init_range_length, os->init_start_pos);
552 for (i = start_index; i < os->nb_segments; i++) {
553 Segment *seg = os->segments[i];
554 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
555 (double) seg->duration / timescale, 0,
556 seg->range_length, seg->start_pos, NULL,
557 c->single_file ? os->initfile : seg->file,
560 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
565 ff_hls_write_end_list(c->m3u8_out);
567 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
570 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
571 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
577 static char *xmlescape(const char *str) {
578 int outlen = strlen(str)*3/2 + 6;
579 char *out = av_realloc(NULL, outlen + 1);
583 for (; *str; str++) {
584 if (pos + 6 > outlen) {
586 outlen = 2 * outlen + 6;
587 tmp = av_realloc(out, outlen + 1);
595 memcpy(&out[pos], "&", 5);
597 } else if (*str == '<') {
598 memcpy(&out[pos], "<", 4);
600 } else if (*str == '>') {
601 memcpy(&out[pos], ">", 4);
603 } else if (*str == '\'') {
604 memcpy(&out[pos], "'", 6);
606 } else if (*str == '\"') {
607 memcpy(&out[pos], """, 6);
617 static void write_time(AVIOContext *out, int64_t time)
619 int seconds = time / AV_TIME_BASE;
620 int fractions = time % AV_TIME_BASE;
621 int minutes = seconds / 60;
622 int hours = minutes / 60;
625 avio_printf(out, "PT");
627 avio_printf(out, "%dH", hours);
628 if (hours || minutes)
629 avio_printf(out, "%dM", minutes);
630 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
633 static void format_date_now(char *buf, int size)
635 time_t t = time(NULL);
636 struct tm *ptm, tmbuf;
637 ptm = gmtime_r(&t, &tmbuf);
639 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
644 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
647 DASHContext *c = s->priv_data;
648 AdaptationSet *as = &c->as[as_index];
649 AVDictionaryEntry *lang, *role;
652 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
653 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
654 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)
655 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
656 lang = av_dict_get(as->metadata, "language", NULL, 0);
658 avio_printf(out, " lang=\"%s\"", lang->value);
659 avio_printf(out, ">\n");
661 role = av_dict_get(as->metadata, "role", NULL, 0);
663 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
665 for (i = 0; i < s->nb_streams; i++) {
666 OutputStream *os = &c->streams[i];
667 char bandwidth_str[64] = {'\0'};
669 if (os->as_idx - 1 != as_index)
672 if (os->bit_rate > 0)
673 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
676 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
677 AVStream *st = s->streams[i];
678 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
679 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
680 if (st->avg_frame_rate.num)
681 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
682 avio_printf(out, ">\n");
684 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
685 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
686 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
687 s->streams[i]->codecpar->channels);
689 output_segment_list(os, out, s, i, final);
690 avio_printf(out, "\t\t\t</Representation>\n");
692 avio_printf(out, "\t\t</AdaptationSet>\n");
697 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
699 DASHContext *c = s->priv_data;
701 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
703 return AVERROR(ENOMEM);
707 *as = &c->as[c->nb_as - 1];
708 memset(*as, 0, sizeof(**as));
709 (*as)->media_type = type;
714 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
716 DASHContext *c = s->priv_data;
717 AdaptationSet *as = &c->as[as_idx - 1];
718 OutputStream *os = &c->streams[i];
720 if (as->media_type != s->streams[i]->codecpar->codec_type) {
721 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
722 return AVERROR(EINVAL);
723 } else if (os->as_idx) {
724 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
725 return AVERROR(EINVAL);
732 static int parse_adaptation_sets(AVFormatContext *s)
734 DASHContext *c = s->priv_data;
735 const char *p = c->adaptation_sets;
736 enum { new_set, parse_id, parsing_streams } state;
740 // default: one AdaptationSet for each stream
742 for (i = 0; i < s->nb_streams; i++) {
743 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
745 snprintf(as->id, sizeof(as->id), "%d", i);
747 c->streams[i].as_idx = c->nb_as;
752 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
758 } else if (state == new_set && av_strstart(p, "id=", &p)) {
760 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
764 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
770 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
771 state = parsing_streams;
772 } else if (state == parsing_streams) {
773 AdaptationSet *as = &c->as[c->nb_as - 1];
774 char idx_str[8], *end_str;
776 n = strcspn(p, " ,");
777 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
780 // if value is "a" or "v", map all streams of that type
781 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
782 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
783 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
785 for (i = 0; i < s->nb_streams; i++) {
786 if (s->streams[i]->codecpar->codec_type != type)
789 as->media_type = s->streams[i]->codecpar->codec_type;
791 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
794 } else { // select single stream
795 i = strtol(idx_str, &end_str, 10);
796 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
797 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
798 return AVERROR(EINVAL);
800 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
802 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
803 as->media_type = s->streams[i]->codecpar->codec_type;
806 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
815 return AVERROR(EINVAL);
820 // check for unassigned streams
821 for (i = 0; i < s->nb_streams; i++) {
822 OutputStream *os = &c->streams[i];
824 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
825 return AVERROR(EINVAL);
831 static int write_manifest(AVFormatContext *s, int final)
833 DASHContext *c = s->priv_data;
835 char temp_filename[1024];
837 const char *proto = avio_find_protocol_name(s->url);
838 int use_rename = proto && !strcmp(proto, "file");
839 static unsigned int warned_non_file = 0;
840 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
841 AVDictionary *opts = NULL;
843 if (!use_rename && !warned_non_file++)
844 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
846 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
847 set_http_options(&opts, c);
848 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
851 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
855 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
856 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
857 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
858 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
859 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
860 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
861 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
863 avio_printf(out, "\tmediaPresentationDuration=\"");
864 write_time(out, c->total_duration);
865 avio_printf(out, "\"\n");
867 int64_t update_period = c->last_duration / AV_TIME_BASE;
869 if (c->use_template && !c->use_timeline)
871 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
872 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
873 if (c->availability_start_time[0])
874 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
875 format_date_now(now_str, sizeof(now_str));
877 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
878 if (c->window_size && c->use_template) {
879 avio_printf(out, "\ttimeShiftBufferDepth=\"");
880 write_time(out, c->last_duration * c->window_size);
881 avio_printf(out, "\"\n");
884 avio_printf(out, "\tminBufferTime=\"");
885 write_time(out, c->last_duration * 2);
886 avio_printf(out, "\">\n");
887 avio_printf(out, "\t<ProgramInformation>\n");
889 char *escaped = xmlescape(title->value);
890 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
893 avio_printf(out, "\t</ProgramInformation>\n");
895 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
896 OutputStream *os = &c->streams[0];
897 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
898 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
899 avio_printf(out, "\t<Period id=\"0\" start=\"");
900 write_time(out, start_time);
901 avio_printf(out, "\">\n");
903 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
906 for (i = 0; i < c->nb_as; i++) {
907 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
910 avio_printf(out, "\t</Period>\n");
912 if (c->utc_timing_url)
913 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
915 avio_printf(out, "</MPD>\n");
917 dashenc_io_close(s, &c->mpd_out, temp_filename);
920 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
924 if (c->hls_playlist && !c->master_playlist_created) {
925 char filename_hls[1024];
926 const char *audio_group = "A1";
927 char audio_codec_str[128] = "\0";
929 int max_audio_bitrate = 0;
932 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
934 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
936 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
938 set_http_options(&opts, c);
939 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
942 av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
946 ff_hls_write_playlist_version(c->m3u8_out, 7);
948 for (i = 0; i < s->nb_streams; i++) {
949 char playlist_file[64];
950 AVStream *st = s->streams[i];
951 OutputStream *os = &c->streams[i];
952 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
954 if (os->segment_type != SEGMENT_TYPE_MP4)
956 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
957 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
958 playlist_file, i, is_default);
959 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
960 os->muxer_overhead, max_audio_bitrate);
961 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
962 if (strlen(audio_codec_str))
963 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
964 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
969 for (i = 0; i < s->nb_streams; i++) {
970 char playlist_file[64];
972 AVStream *st = s->streams[i];
973 OutputStream *os = &c->streams[i];
975 char *codec_str_ptr = NULL;
976 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
977 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
979 if (os->segment_type != SEGMENT_TYPE_MP4)
981 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
982 if (max_audio_bitrate) {
983 agroup = (char *)audio_group;
984 stream_bitrate += max_audio_bitrate;
985 av_strlcat(codec_str, ",", sizeof(codec_str));
986 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
988 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
989 codec_str_ptr = codec_str;
991 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
992 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
993 playlist_file, agroup,
994 codec_str_ptr, NULL);
996 dashenc_io_close(s, &c->m3u8_out, temp_filename);
998 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
1000 c->master_playlist_created = 1;
1006 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1008 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1010 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1014 static int dash_init(AVFormatContext *s)
1016 DASHContext *c = s->priv_data;
1019 char basename[1024];
1021 if (c->single_file_name)
1024 c->use_template = 0;
1026 #if FF_API_DASH_MIN_SEG_DURATION
1027 if (c->min_seg_duration != 5000000) {
1028 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1029 c->seg_duration = c->min_seg_duration;
1033 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1034 ptr = strrchr(c->dirname, '/');
1036 av_strlcpy(basename, &ptr[1], sizeof(basename));
1039 c->dirname[0] = '\0';
1040 av_strlcpy(basename, s->url, sizeof(basename));
1043 ptr = strrchr(basename, '.');
1047 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1049 return AVERROR(ENOMEM);
1051 if ((ret = parse_adaptation_sets(s)) < 0)
1054 if ((ret = init_segment_types(s)) < 0)
1057 for (i = 0; i < s->nb_streams; i++) {
1058 OutputStream *os = &c->streams[i];
1059 AdaptationSet *as = &c->as[os->as_idx - 1];
1060 AVFormatContext *ctx;
1062 AVDictionary *opts = NULL;
1063 char filename[1024];
1065 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1066 if (!os->bit_rate) {
1067 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1068 AV_LOG_ERROR : AV_LOG_WARNING;
1069 av_log(s, level, "No bit rate set for stream %d\n", i);
1070 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1071 return AVERROR(EINVAL);
1074 // copy AdaptationSet language and role from stream metadata
1075 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1076 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1078 ctx = avformat_alloc_context();
1080 return AVERROR(ENOMEM);
1082 if (c->init_seg_name) {
1083 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->format_name);
1084 if (!os->init_seg_name)
1085 return AVERROR(ENOMEM);
1087 if (c->media_seg_name) {
1088 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->format_name);
1089 if (!os->media_seg_name)
1090 return AVERROR(ENOMEM);
1092 if (c->single_file_name) {
1093 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->format_name);
1094 if (!os->single_file_name)
1095 return AVERROR(ENOMEM);
1098 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1099 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1100 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1101 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1102 av_log(s, AV_LOG_WARNING,
1103 "One or many segment file names doesn't end with .webm. "
1104 "Override -init_seg_name and/or -media_seg_name and/or "
1105 "-single_file_name to end with the extension .webm\n");
1109 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1111 return AVERROR_MUXER_NOT_FOUND;
1113 ctx->interrupt_callback = s->interrupt_callback;
1114 ctx->opaque = s->opaque;
1115 ctx->io_close = s->io_close;
1116 ctx->io_open = s->io_open;
1117 ctx->strict_std_compliance = s->strict_std_compliance;
1119 if (!(st = avformat_new_stream(ctx, NULL)))
1120 return AVERROR(ENOMEM);
1121 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1122 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1123 st->time_base = s->streams[i]->time_base;
1124 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1125 ctx->avoid_negative_ts = s->avoid_negative_ts;
1126 ctx->flags = s->flags;
1128 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1131 if (c->single_file) {
1132 if (os->single_file_name)
1133 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1135 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1137 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1139 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1140 set_http_options(&opts, c);
1141 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1142 av_dict_free(&opts);
1145 os->init_start_pos = 0;
1147 if (c->format_options_str) {
1148 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1153 if (os->segment_type == SEGMENT_TYPE_MP4) {
1155 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+global_sidx", 0);
1157 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1159 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1160 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1161 av_dict_set_int(&opts, "dash", 1, 0);
1162 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1163 av_dict_set_int(&opts, "live", 1, 0);
1165 ret = avformat_init_output(ctx, &opts);
1166 av_dict_free(&opts);
1170 avio_flush(ctx->pb);
1172 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1174 s->streams[i]->time_base = st->time_base;
1175 // If the muxer wants to shift timestamps, request to have them shifted
1176 // already before being handed to this muxer, so we don't have mismatches
1177 // between the MPD and the actual segments.
1178 s->avoid_negative_ts = ctx->avoid_negative_ts;
1179 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1180 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1181 if (avg_frame_rate.num > 0) {
1182 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1183 as->min_frame_rate = avg_frame_rate;
1184 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1185 as->max_frame_rate = avg_frame_rate;
1187 as->ambiguous_frame_rate = 1;
1192 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1193 sizeof(os->codec_str));
1194 os->first_pts = AV_NOPTS_VALUE;
1195 os->max_pts = AV_NOPTS_VALUE;
1196 os->last_dts = AV_NOPTS_VALUE;
1197 os->segment_index = 1;
1200 if (!c->has_video && c->seg_duration <= 0) {
1201 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1202 return AVERROR(EINVAL);
1207 static int dash_write_header(AVFormatContext *s)
1209 DASHContext *c = s->priv_data;
1211 for (i = 0; i < s->nb_streams; i++) {
1212 OutputStream *os = &c->streams[i];
1213 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1216 // Flush init segment
1217 // Only for WebM segment, since for mp4 delay_moov is set and
1218 // the init segment is thus flushed after the first packets.
1219 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1220 (ret = flush_init_segment(s, os)) < 0)
1226 static int add_segment(OutputStream *os, const char *file,
1227 int64_t time, int64_t duration,
1228 int64_t start_pos, int64_t range_length,
1229 int64_t index_length, int next_exp_index)
1233 if (os->nb_segments >= os->segments_size) {
1234 os->segments_size = (os->segments_size + 1) * 2;
1235 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1236 os->segments_size)) < 0) {
1237 os->segments_size = 0;
1238 os->nb_segments = 0;
1242 seg = av_mallocz(sizeof(*seg));
1244 return AVERROR(ENOMEM);
1245 av_strlcpy(seg->file, file, sizeof(seg->file));
1247 seg->duration = duration;
1248 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1249 seg->duration += seg->time;
1252 seg->start_pos = start_pos;
1253 seg->range_length = range_length;
1254 seg->index_length = index_length;
1255 os->segments[os->nb_segments++] = seg;
1256 os->segment_index++;
1257 //correcting the segment index if it has fallen behind the expected value
1258 if (os->segment_index < next_exp_index) {
1259 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1260 file, os->segment_index, next_exp_index);
1261 os->segment_index = next_exp_index;
1266 static void write_styp(AVIOContext *pb)
1269 ffio_wfourcc(pb, "styp");
1270 ffio_wfourcc(pb, "msdh");
1271 avio_wb32(pb, 0); /* minor */
1272 ffio_wfourcc(pb, "msdh");
1273 ffio_wfourcc(pb, "msix");
1276 static void find_index_range(AVFormatContext *s, const char *full_path,
1277 int64_t pos, int *index_length)
1283 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1286 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1287 ff_format_io_close(s, &pb);
1290 ret = avio_read(pb, buf, 8);
1291 ff_format_io_close(s, &pb);
1294 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1296 *index_length = AV_RB32(&buf[0]);
1299 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1300 AVCodecParameters *par,
1301 AVRational *frame_rate)
1305 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1308 extradata = av_malloc(par->extradata_size);
1311 return AVERROR(ENOMEM);
1313 memcpy(extradata, par->extradata, par->extradata_size);
1315 os->ctx->streams[0]->codecpar->extradata = extradata;
1316 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1318 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1323 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1324 DASHContext *c = s->priv_data;
1325 int http_base_proto = ff_is_http_proto(filename);
1327 if (http_base_proto) {
1328 AVIOContext *out = NULL;
1329 AVDictionary *http_opts = NULL;
1331 set_http_options(&http_opts, c);
1332 av_dict_set(&http_opts, "method", "DELETE", 0);
1334 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1335 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1338 av_dict_free(&http_opts);
1339 ff_format_io_close(s, &out);
1340 } else if (unlink(filename) < 0) {
1341 av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
1345 static int dash_flush(AVFormatContext *s, int final, int stream)
1347 DASHContext *c = s->priv_data;
1350 const char *proto = avio_find_protocol_name(s->url);
1351 int use_rename = proto && !strcmp(proto, "file");
1353 int cur_flush_segment_index = 0, next_exp_index = -1;
1355 cur_flush_segment_index = c->streams[stream].segment_index;
1357 //finding the next segment's expected index, based on the current pts value
1358 if (c->use_template && !c->use_timeline && c->index_correction &&
1359 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1360 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1361 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1362 c->streams[stream].first_pts,
1363 s->streams[stream]->time_base,
1365 next_exp_index = (pts_diff / c->seg_duration) + 1;
1369 for (i = 0; i < s->nb_streams; i++) {
1370 OutputStream *os = &c->streams[i];
1371 AVStream *st = s->streams[i];
1372 int range_length, index_length = 0;
1374 if (!os->packets_written)
1377 // Flush the single stream that got a keyframe right now.
1378 // Flush all audio streams as well, in sync with video keyframes,
1379 // but not the other video streams.
1380 if (stream >= 0 && i != stream) {
1381 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1383 // Make sure we don't flush audio streams multiple times, when
1384 // all video streams are flushed one at a time.
1385 if (c->has_video && os->segment_index > cur_flush_segment_index)
1389 if (!c->single_file) {
1390 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1391 write_styp(os->ctx->pb);
1393 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1396 ret = flush_dynbuf(os, &range_length);
1399 os->packets_written = 0;
1401 if (c->single_file) {
1402 find_index_range(s, os->full_path, os->pos, &index_length);
1404 dashenc_io_close(s, &os->out, os->temp_path);
1407 ret = avpriv_io_move(os->temp_path, os->full_path);
1413 if (!os->muxer_overhead)
1414 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1416 av_rescale_q(os->max_pts - os->start_pts,
1417 st->time_base, AV_TIME_BASE_Q);
1418 os->total_pkt_size = 0;
1420 if (!os->bit_rate) {
1421 // calculate average bitrate of first segment
1422 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1426 os->bit_rate = bitrate;
1428 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1429 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1431 os->pos += range_length;
1434 if (c->window_size || (final && c->remove_at_exit)) {
1435 for (i = 0; i < s->nb_streams; i++) {
1436 OutputStream *os = &c->streams[i];
1438 int remove = os->nb_segments - c->window_size - c->extra_window_size;
1439 if (final && c->remove_at_exit)
1440 remove = os->nb_segments;
1442 for (j = 0; j < remove; j++) {
1443 char filename[1024];
1444 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
1445 dashenc_delete_file(s, filename);
1446 av_free(os->segments[j]);
1448 os->nb_segments -= remove;
1449 memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
1455 ret = write_manifest(s, final);
1459 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1461 DASHContext *c = s->priv_data;
1462 AVStream *st = s->streams[pkt->stream_index];
1463 OutputStream *os = &c->streams[pkt->stream_index];
1464 int64_t seg_end_duration, elapsed_duration;
1467 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1471 // Fill in a heuristic guess of the packet duration, if none is available.
1472 // The mp4 muxer will do something similar (for the last packet in a fragment)
1473 // if nothing is set (setting it for the other packets doesn't hurt).
1474 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1475 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1476 // so that we know the exact timestamps of fragments.
1477 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1478 pkt->duration = pkt->dts - os->last_dts;
1479 os->last_dts = pkt->dts;
1481 // If forcing the stream to start at 0, the mp4 muxer will set the start
1482 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1483 if (os->first_pts == AV_NOPTS_VALUE &&
1484 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1485 pkt->pts -= pkt->dts;
1489 if (os->first_pts == AV_NOPTS_VALUE)
1490 os->first_pts = pkt->pts;
1491 os->last_pts = pkt->pts;
1493 if (!c->availability_start_time[0])
1494 format_date_now(c->availability_start_time,
1495 sizeof(c->availability_start_time));
1497 if (!os->availability_time_offset && pkt->duration) {
1498 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1500 os->availability_time_offset = ((double) c->seg_duration -
1501 frame_duration) / AV_TIME_BASE;
1504 if (c->use_template && !c->use_timeline) {
1505 elapsed_duration = pkt->pts - os->first_pts;
1506 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1508 elapsed_duration = pkt->pts - os->start_pts;
1509 seg_end_duration = c->seg_duration;
1512 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1513 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1514 av_compare_ts(elapsed_duration, st->time_base,
1515 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1516 int64_t prev_duration = c->last_duration;
1518 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1521 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1525 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1526 if (c->last_duration < prev_duration*9/10 ||
1527 c->last_duration > prev_duration*11/10) {
1528 av_log(s, AV_LOG_WARNING,
1529 "Segment durations differ too much, enable use_timeline "
1530 "and use_template, or keep a stricter keyframe interval\n");
1534 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1538 if (!os->packets_written) {
1539 // If we wrote a previous segment, adjust the start time of the segment
1540 // to the end of the previous one (which is the same as the mp4 muxer
1541 // does). This avoids gaps in the timeline.
1542 if (os->max_pts != AV_NOPTS_VALUE)
1543 os->start_pts = os->max_pts;
1545 os->start_pts = pkt->pts;
1547 if (os->max_pts == AV_NOPTS_VALUE)
1548 os->max_pts = pkt->pts + pkt->duration;
1550 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1551 os->packets_written++;
1552 os->total_pkt_size += pkt->size;
1553 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1556 if (!os->init_range_length)
1557 flush_init_segment(s, os);
1559 //open the output context when the first frame of a segment is ready
1560 if (!c->single_file && os->packets_written == 1) {
1561 AVDictionary *opts = NULL;
1562 const char *proto = avio_find_protocol_name(s->url);
1563 int use_rename = proto && !strcmp(proto, "file");
1564 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1565 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1566 os->media_seg_name, pkt->stream_index,
1567 os->segment_index, os->bit_rate, os->start_pts);
1568 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1570 snprintf(os->temp_path, sizeof(os->temp_path),
1571 use_rename ? "%s.tmp" : "%s", os->full_path);
1572 set_http_options(&opts, c);
1573 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1574 av_dict_free(&opts);
1579 //write out the data immediately in streaming mode
1580 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1582 uint8_t *buf = NULL;
1583 if (!os->written_len)
1584 write_styp(os->ctx->pb);
1585 avio_flush(os->ctx->pb);
1586 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1587 avio_write(os->out, buf + os->written_len, len - os->written_len);
1588 os->written_len = len;
1589 avio_flush(os->out);
1595 static int dash_write_trailer(AVFormatContext *s)
1597 DASHContext *c = s->priv_data;
1599 if (s->nb_streams > 0) {
1600 OutputStream *os = &c->streams[0];
1601 // If no segments have been written so far, try to do a crude
1602 // guess of the segment duration
1603 if (!c->last_duration)
1604 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1605 s->streams[0]->time_base,
1607 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1608 s->streams[0]->time_base,
1611 dash_flush(s, 1, -1);
1613 if (c->remove_at_exit) {
1614 char filename[1024];
1616 for (i = 0; i < s->nb_streams; i++) {
1617 OutputStream *os = &c->streams[i];
1618 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1619 dashenc_delete_file(s, filename);
1621 dashenc_delete_file(s, s->url);
1627 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1629 DASHContext *c = s->priv_data;
1630 OutputStream *os = &c->streams[avpkt->stream_index];
1631 AVFormatContext *oc = os->ctx;
1632 if (oc->oformat->check_bitstream) {
1634 AVPacket pkt = *avpkt;
1635 pkt.stream_index = 0;
1636 ret = oc->oformat->check_bitstream(oc, &pkt);
1638 AVStream *st = s->streams[avpkt->stream_index];
1639 AVStream *ost = oc->streams[0];
1640 st->internal->bsfcs = ost->internal->bsfcs;
1641 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1642 ost->internal->bsfcs = NULL;
1643 ost->internal->nb_bsfcs = 0;
1650 #define OFFSET(x) offsetof(DASHContext, x)
1651 #define E AV_OPT_FLAG_ENCODING_PARAM
1652 static const AVOption options[] = {
1653 { "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 },
1654 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1655 { "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 },
1656 #if FF_API_DASH_MIN_SEG_DURATION
1657 { "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 },
1659 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1660 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1661 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1662 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1663 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1664 { "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 },
1665 { "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 },
1666 { "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 },
1667 { "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 },
1668 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1669 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1670 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1671 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1672 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1673 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1674 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1675 { "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},
1676 { "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"},
1677 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1678 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1679 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1683 static const AVClass dash_class = {
1684 .class_name = "dash muxer",
1685 .item_name = av_default_item_name,
1687 .version = LIBAVUTIL_VERSION_INT,
1690 AVOutputFormat ff_dash_muxer = {
1692 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1693 .extensions = "mpd",
1694 .priv_data_size = sizeof(DASHContext),
1695 .audio_codec = AV_CODEC_ID_AAC,
1696 .video_codec = AV_CODEC_ID_H264,
1697 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1699 .write_header = dash_write_header,
1700 .write_packet = dash_write_packet,
1701 .write_trailer = dash_write_trailer,
1702 .deinit = dash_free,
1703 .check_bitstream = dash_check_bitstream,
1704 .priv_class = &dash_class,