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.h"
36 #include "libavutil/time_internal.h"
40 #include "avio_internal.h"
41 #include "hlsplaylist.h"
42 #if CONFIG_HTTP_PROTOCOL
47 #include "os_support.h"
53 SEGMENT_TYPE_AUTO = 0,
59 typedef struct Segment {
62 int range_length, index_length;
64 double prog_date_time;
69 typedef struct AdaptationSet {
71 enum AVMediaType media_type;
72 AVDictionary *metadata;
73 AVRational min_frame_rate, max_frame_rate;
74 int ambiguous_frame_rate;
77 typedef struct OutputStream {
79 int ctx_inited, as_idx;
83 int64_t init_start_pos, pos;
84 int init_range_length;
85 int nb_segments, segments_size, segment_index;
87 int64_t first_pts, start_pts, max_pts;
88 int64_t last_dts, last_pts;
90 SegmentType segment_type; /* segment type selected for this particular stream */
91 const char *format_name;
92 const char *single_file_name; /* file names selected for this particular stream */
93 const char *init_seg_name;
94 const char *media_seg_name;
100 char temp_path[1024];
101 double availability_time_offset;
106 typedef struct DASHContext {
107 const AVClass *class; /* Class for private options. */
108 char *adaptation_sets;
112 int extra_window_size;
113 #if FF_API_DASH_MIN_SEG_DURATION
114 int min_seg_duration;
116 int64_t seg_duration;
121 OutputStream *streams;
123 int64_t last_duration;
124 int64_t total_duration;
125 char availability_start_time[100];
128 const char *single_file_name; /* file names as specified in options */
129 const char *init_seg_name;
130 const char *media_seg_name;
131 const char *utc_timing_url;
133 const char *user_agent;
136 int master_playlist_created;
137 AVIOContext *mpd_out;
138 AVIOContext *m3u8_out;
141 int index_correction;
142 char *format_options_str;
143 SegmentType segment_type_option; /* segment type as specified in options */
144 int ignore_io_errors;
146 int master_publish_rate;
149 static struct codec_string {
153 { AV_CODEC_ID_VP8, "vp8" },
154 { AV_CODEC_ID_VP9, "vp9" },
155 { AV_CODEC_ID_VORBIS, "vorbis" },
156 { AV_CODEC_ID_OPUS, "opus" },
157 { AV_CODEC_ID_FLAC, "flac" },
161 static struct format_string {
162 SegmentType segment_type;
165 { SEGMENT_TYPE_AUTO, "auto" },
166 { SEGMENT_TYPE_MP4, "mp4" },
167 { SEGMENT_TYPE_WEBM, "webm" },
171 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
172 AVDictionary **options) {
173 DASHContext *c = s->priv_data;
174 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
175 int err = AVERROR_MUXER_NOT_FOUND;
176 if (!*pb || !http_base_proto || !c->http_persistent) {
177 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
178 #if CONFIG_HTTP_PROTOCOL
180 URLContext *http_url_context = ffio_geturlcontext(*pb);
181 av_assert0(http_url_context);
182 err = ff_http_do_new_request(http_url_context, filename);
184 ff_format_io_close(s, pb);
190 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
191 DASHContext *c = s->priv_data;
192 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
197 if (!http_base_proto || !c->http_persistent) {
198 ff_format_io_close(s, pb);
199 #if CONFIG_HTTP_PROTOCOL
201 URLContext *http_url_context = ffio_geturlcontext(*pb);
202 av_assert0(http_url_context);
204 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
209 static const char *get_format_str(SegmentType segment_type) {
211 for (i = 0; i < SEGMENT_TYPE_NB; i++)
212 if (formats[i].segment_type == segment_type)
213 return formats[i].str;
217 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
218 DASHContext *c = s->priv_data;
219 char errbuf[AV_ERROR_MAX_STRING_SIZE];
220 av_strerror(err, errbuf, sizeof(errbuf));
221 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
222 "Unable to open %s for writing: %s\n", url, errbuf);
223 return c->ignore_io_errors ? 0 : err;
226 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
228 if (segment_type == SEGMENT_TYPE_AUTO) {
229 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
230 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
231 segment_type = SEGMENT_TYPE_WEBM;
233 segment_type = SEGMENT_TYPE_MP4;
240 static int init_segment_types(AVFormatContext *s)
242 DASHContext *c = s->priv_data;
243 int has_mp4_streams = 0;
244 for (int i = 0; i < s->nb_streams; ++i) {
245 OutputStream *os = &c->streams[i];
246 SegmentType segment_type = select_segment_type(
247 c->segment_type_option, s->streams[i]->codecpar->codec_id);
248 os->segment_type = segment_type;
249 os->format_name = get_format_str(segment_type);
250 if (!os->format_name) {
251 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
252 return AVERROR_MUXER_NOT_FOUND;
254 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
257 if (c->hls_playlist && !has_mp4_streams) {
258 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
265 static int check_file_extension(const char *filename, const char *extension) {
267 if (!filename || !extension)
269 dot = strrchr(filename, '.');
270 if (dot && !strcmp(dot + 1, extension))
275 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
276 AVRational *frame_rate, char *str, int size) {
278 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
280 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
281 vpcc.profile, vpcc.level, vpcc.bitdepth);
283 // Default to just vp9 in case of error while finding out profile or level
284 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
285 av_strlcpy(str, "vp9", size);
290 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
291 AVRational *frame_rate, char *str, int size)
293 const AVCodecTag *tags[2] = { NULL, NULL };
297 // common Webm codecs are not part of RFC 6381
298 for (i = 0; codecs[i].id; i++)
299 if (codecs[i].id == par->codec_id) {
300 if (codecs[i].id == AV_CODEC_ID_VP9) {
301 set_vp9_codec_str(s, par, frame_rate, str, size);
303 av_strlcpy(str, codecs[i].str, size);
308 // for codecs part of RFC 6381
309 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
310 tags[0] = ff_codec_movvideo_tags;
311 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
312 tags[0] = ff_codec_movaudio_tags;
316 tag = par->codec_tag;
318 tag = av_codec_get_tag(tags, par->codec_id);
326 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
328 tags[0] = ff_mp4_obj_type;
329 oti = av_codec_get_tag(tags, par->codec_id);
331 av_strlcatf(str, size, ".%02"PRIx32, oti);
335 if (tag == MKTAG('m', 'p', '4', 'a')) {
336 if (par->extradata_size >= 2) {
337 int aot = par->extradata[0] >> 3;
339 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
340 av_strlcatf(str, size, ".%d", aot);
342 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
343 // Unimplemented, should output ProfileLevelIndication as a decimal number
344 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
346 } else if (!strcmp(str, "avc1")) {
347 uint8_t *tmpbuf = NULL;
348 uint8_t *extradata = par->extradata;
349 int extradata_size = par->extradata_size;
352 if (extradata[0] != 1) {
354 if (avio_open_dyn_buf(&pb) < 0)
356 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
357 ffio_free_dyn_buf(&pb);
360 extradata_size = avio_close_dyn_buf(pb, &extradata);
364 if (extradata_size >= 4)
365 av_strlcatf(str, size, ".%02x%02x%02x",
366 extradata[1], extradata[2], extradata[3]);
371 static int flush_dynbuf(OutputStream *os, int *range_length)
376 return AVERROR(EINVAL);
380 av_write_frame(os->ctx, NULL);
381 avio_flush(os->ctx->pb);
384 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
387 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
392 return avio_open_dyn_buf(&os->ctx->pb);
395 static void set_http_options(AVDictionary **options, DASHContext *c)
398 av_dict_set(options, "method", c->method, 0);
400 av_dict_set(options, "user_agent", c->user_agent, 0);
401 if (c->http_persistent)
402 av_dict_set_int(options, "multiple_requests", 1, 0);
404 av_dict_set_int(options, "timeout", c->timeout, 0);
407 static void get_hls_playlist_name(char *playlist_name, int string_size,
408 const char *base_url, int id) {
410 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
412 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
415 static void get_start_index_number(OutputStream *os, DASHContext *c,
416 int *start_index, int *start_number) {
419 if (c->window_size) {
420 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
421 *start_number = FFMAX(os->segment_index - c->window_size, 1);
425 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
426 int representation_id, int final,
427 char *prefetch_url) {
428 DASHContext *c = s->priv_data;
429 int timescale = os->ctx->streams[0]->time_base.den;
430 char temp_filename_hls[1024];
431 char filename_hls[1024];
432 AVDictionary *http_opts = NULL;
433 int target_duration = 0;
435 const char *proto = avio_find_protocol_name(c->dirname);
436 int use_rename = proto && !strcmp(proto, "file");
437 int i, start_index, start_number;
438 double prog_date_time = 0;
440 get_start_index_number(os, c, &start_index, &start_number);
442 if (!c->hls_playlist || start_index >= os->nb_segments ||
443 os->segment_type != SEGMENT_TYPE_MP4)
446 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
447 c->dirname, representation_id);
449 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
451 set_http_options(&http_opts, c);
452 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
453 av_dict_free(&http_opts);
455 handle_io_open_error(s, ret, temp_filename_hls);
458 for (i = start_index; i < os->nb_segments; i++) {
459 Segment *seg = os->segments[i];
460 double duration = (double) seg->duration / timescale;
461 if (target_duration <= duration)
462 target_duration = lrint(duration);
465 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
466 start_number, PLAYLIST_TYPE_NONE);
468 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
469 os->init_range_length, os->init_start_pos);
471 for (i = start_index; i < os->nb_segments; i++) {
472 Segment *seg = os->segments[i];
474 if (prog_date_time == 0) {
475 if (os->nb_segments == 1)
476 prog_date_time = c->start_time_s;
478 prog_date_time = seg->prog_date_time;
480 seg->prog_date_time = prog_date_time;
482 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
483 (double) seg->duration / timescale, 0,
484 seg->range_length, seg->start_pos, NULL,
485 c->single_file ? os->initfile : seg->file,
488 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
493 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
496 ff_hls_write_end_list(c->m3u8_out);
498 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
501 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
502 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
506 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
508 DASHContext *c = s->priv_data;
509 int ret, range_length;
511 ret = flush_dynbuf(os, &range_length);
515 os->pos = os->init_range_length = range_length;
516 if (!c->single_file) {
518 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
519 dashenc_io_close(s, &os->out, filename);
524 static void dash_free(AVFormatContext *s)
526 DASHContext *c = s->priv_data;
530 for (i = 0; i < c->nb_as; i++)
531 av_dict_free(&c->as[i].metadata);
538 for (i = 0; i < s->nb_streams; i++) {
539 OutputStream *os = &c->streams[i];
540 if (os->ctx && os->ctx->pb)
541 ffio_free_dyn_buf(&os->ctx->pb);
542 ff_format_io_close(s, &os->out);
544 avformat_free_context(os->ctx);
545 for (j = 0; j < os->nb_segments; j++)
546 av_free(os->segments[j]);
547 av_free(os->segments);
548 av_freep(&os->single_file_name);
549 av_freep(&os->init_seg_name);
550 av_freep(&os->media_seg_name);
552 av_freep(&c->streams);
554 ff_format_io_close(s, &c->mpd_out);
555 ff_format_io_close(s, &c->m3u8_out);
558 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
559 int representation_id, int final)
561 DASHContext *c = s->priv_data;
562 int i, start_index, start_number;
563 get_start_index_number(os, c, &start_index, &start_number);
565 if (c->use_template) {
566 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
567 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
568 if (!c->use_timeline) {
569 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
570 if (c->streaming && os->availability_time_offset)
571 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
572 os->availability_time_offset);
574 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
575 if (c->use_timeline) {
576 int64_t cur_time = 0;
577 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
578 for (i = start_index; i < os->nb_segments; ) {
579 Segment *seg = os->segments[i];
581 avio_printf(out, "\t\t\t\t\t\t<S ");
582 if (i == start_index || seg->time != cur_time) {
583 cur_time = seg->time;
584 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
586 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
587 while (i + repeat + 1 < os->nb_segments &&
588 os->segments[i + repeat + 1]->duration == seg->duration &&
589 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
592 avio_printf(out, "r=\"%d\" ", repeat);
593 avio_printf(out, "/>\n");
595 cur_time += (1 + repeat) * seg->duration;
597 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
599 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
600 } else if (c->single_file) {
601 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
602 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
603 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);
604 for (i = start_index; i < os->nb_segments; i++) {
605 Segment *seg = os->segments[i];
606 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
607 if (seg->index_length)
608 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
609 avio_printf(out, "/>\n");
611 avio_printf(out, "\t\t\t\t</SegmentList>\n");
613 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
614 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
615 for (i = start_index; i < os->nb_segments; i++) {
616 Segment *seg = os->segments[i];
617 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
619 avio_printf(out, "\t\t\t\t</SegmentList>\n");
621 if (!c->lhls || final) {
622 write_hls_media_playlist(os, s, representation_id, final, NULL);
627 static char *xmlescape(const char *str) {
628 int outlen = strlen(str)*3/2 + 6;
629 char *out = av_realloc(NULL, outlen + 1);
633 for (; *str; str++) {
634 if (pos + 6 > outlen) {
636 outlen = 2 * outlen + 6;
637 tmp = av_realloc(out, outlen + 1);
645 memcpy(&out[pos], "&", 5);
647 } else if (*str == '<') {
648 memcpy(&out[pos], "<", 4);
650 } else if (*str == '>') {
651 memcpy(&out[pos], ">", 4);
653 } else if (*str == '\'') {
654 memcpy(&out[pos], "'", 6);
656 } else if (*str == '\"') {
657 memcpy(&out[pos], """, 6);
667 static void write_time(AVIOContext *out, int64_t time)
669 int seconds = time / AV_TIME_BASE;
670 int fractions = time % AV_TIME_BASE;
671 int minutes = seconds / 60;
672 int hours = minutes / 60;
675 avio_printf(out, "PT");
677 avio_printf(out, "%dH", hours);
678 if (hours || minutes)
679 avio_printf(out, "%dM", minutes);
680 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
683 static void format_date_now(char *buf, int size)
685 struct tm *ptm, tmbuf;
686 int64_t time_us = av_gettime();
687 int64_t time_ms = time_us / 1000;
688 const time_t time_s = time_ms / 1000;
689 int millisec = time_ms - (time_s * 1000);
690 ptm = gmtime_r(&time_s, &tmbuf);
693 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
698 snprintf(buf + len, size - len, ".%03dZ", millisec);
702 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
705 DASHContext *c = s->priv_data;
706 AdaptationSet *as = &c->as[as_index];
707 AVDictionaryEntry *lang, *role;
710 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
711 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
712 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)
713 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
714 lang = av_dict_get(as->metadata, "language", NULL, 0);
716 avio_printf(out, " lang=\"%s\"", lang->value);
717 avio_printf(out, ">\n");
719 role = av_dict_get(as->metadata, "role", NULL, 0);
721 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
723 for (i = 0; i < s->nb_streams; i++) {
724 OutputStream *os = &c->streams[i];
725 char bandwidth_str[64] = {'\0'};
727 if (os->as_idx - 1 != as_index)
730 if (os->bit_rate > 0)
731 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
734 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
735 AVStream *st = s->streams[i];
736 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
737 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
738 if (st->avg_frame_rate.num)
739 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
740 avio_printf(out, ">\n");
742 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
743 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
744 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
745 s->streams[i]->codecpar->channels);
747 output_segment_list(os, out, s, i, final);
748 avio_printf(out, "\t\t\t</Representation>\n");
750 avio_printf(out, "\t\t</AdaptationSet>\n");
755 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
757 DASHContext *c = s->priv_data;
759 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
761 return AVERROR(ENOMEM);
765 *as = &c->as[c->nb_as - 1];
766 memset(*as, 0, sizeof(**as));
767 (*as)->media_type = type;
772 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
774 DASHContext *c = s->priv_data;
775 AdaptationSet *as = &c->as[as_idx - 1];
776 OutputStream *os = &c->streams[i];
778 if (as->media_type != s->streams[i]->codecpar->codec_type) {
779 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
780 return AVERROR(EINVAL);
781 } else if (os->as_idx) {
782 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
783 return AVERROR(EINVAL);
790 static int parse_adaptation_sets(AVFormatContext *s)
792 DASHContext *c = s->priv_data;
793 const char *p = c->adaptation_sets;
794 enum { new_set, parse_id, parsing_streams } state;
798 // default: one AdaptationSet for each stream
800 for (i = 0; i < s->nb_streams; i++) {
801 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
803 snprintf(as->id, sizeof(as->id), "%d", i);
805 c->streams[i].as_idx = c->nb_as;
810 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
816 } else if (state == new_set && av_strstart(p, "id=", &p)) {
818 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
822 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
828 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
829 state = parsing_streams;
830 } else if (state == parsing_streams) {
831 AdaptationSet *as = &c->as[c->nb_as - 1];
832 char idx_str[8], *end_str;
834 n = strcspn(p, " ,");
835 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
838 // if value is "a" or "v", map all streams of that type
839 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
840 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
841 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
843 for (i = 0; i < s->nb_streams; i++) {
844 if (s->streams[i]->codecpar->codec_type != type)
847 as->media_type = s->streams[i]->codecpar->codec_type;
849 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
852 } else { // select single stream
853 i = strtol(idx_str, &end_str, 10);
854 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
855 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
856 return AVERROR(EINVAL);
858 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
860 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
861 as->media_type = s->streams[i]->codecpar->codec_type;
864 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
873 return AVERROR(EINVAL);
878 // check for unassigned streams
879 for (i = 0; i < s->nb_streams; i++) {
880 OutputStream *os = &c->streams[i];
882 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
883 return AVERROR(EINVAL);
889 static int write_manifest(AVFormatContext *s, int final)
891 DASHContext *c = s->priv_data;
893 char temp_filename[1024];
895 const char *proto = avio_find_protocol_name(s->url);
896 int use_rename = proto && !strcmp(proto, "file");
897 static unsigned int warned_non_file = 0;
898 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
899 AVDictionary *opts = NULL;
901 if (!use_rename && !warned_non_file++)
902 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
904 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
905 set_http_options(&opts, c);
906 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
909 return handle_io_open_error(s, ret, temp_filename);
912 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
913 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
914 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
915 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
916 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
917 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
918 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
920 avio_printf(out, "\tmediaPresentationDuration=\"");
921 write_time(out, c->total_duration);
922 avio_printf(out, "\"\n");
924 int64_t update_period = c->last_duration / AV_TIME_BASE;
926 if (c->use_template && !c->use_timeline)
928 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
929 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
930 if (c->availability_start_time[0])
931 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
932 format_date_now(now_str, sizeof(now_str));
934 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
935 if (c->window_size && c->use_template) {
936 avio_printf(out, "\ttimeShiftBufferDepth=\"");
937 write_time(out, c->last_duration * c->window_size);
938 avio_printf(out, "\"\n");
941 avio_printf(out, "\tminBufferTime=\"");
942 write_time(out, c->last_duration * 2);
943 avio_printf(out, "\">\n");
944 avio_printf(out, "\t<ProgramInformation>\n");
946 char *escaped = xmlescape(title->value);
947 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
950 avio_printf(out, "\t</ProgramInformation>\n");
952 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
953 OutputStream *os = &c->streams[0];
954 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
955 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
956 avio_printf(out, "\t<Period id=\"0\" start=\"");
957 write_time(out, start_time);
958 avio_printf(out, "\">\n");
960 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
963 for (i = 0; i < c->nb_as; i++) {
964 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
967 avio_printf(out, "\t</Period>\n");
969 if (c->utc_timing_url)
970 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
972 avio_printf(out, "</MPD>\n");
974 dashenc_io_close(s, &c->mpd_out, temp_filename);
977 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
981 if (c->hls_playlist) {
982 char filename_hls[1024];
983 const char *audio_group = "A1";
984 char audio_codec_str[128] = "\0";
986 int max_audio_bitrate = 0;
988 // Publish master playlist only the configured rate
989 if (c->master_playlist_created && (!c->master_publish_rate ||
990 c->streams[0].segment_index % c->master_publish_rate))
994 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
996 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
998 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1000 set_http_options(&opts, c);
1001 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1002 av_dict_free(&opts);
1004 return handle_io_open_error(s, ret, temp_filename);
1007 ff_hls_write_playlist_version(c->m3u8_out, 7);
1009 for (i = 0; i < s->nb_streams; i++) {
1010 char playlist_file[64];
1011 AVStream *st = s->streams[i];
1012 OutputStream *os = &c->streams[i];
1013 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1015 if (os->segment_type != SEGMENT_TYPE_MP4)
1017 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1018 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1019 playlist_file, NULL, i, is_default);
1020 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1021 os->muxer_overhead, max_audio_bitrate);
1022 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1023 if (strlen(audio_codec_str))
1024 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1025 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1030 for (i = 0; i < s->nb_streams; i++) {
1031 char playlist_file[64];
1032 char codec_str[128];
1033 AVStream *st = s->streams[i];
1034 OutputStream *os = &c->streams[i];
1035 char *agroup = NULL;
1036 char *codec_str_ptr = NULL;
1037 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
1038 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1040 if (os->segment_type != SEGMENT_TYPE_MP4)
1042 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1043 if (max_audio_bitrate) {
1044 agroup = (char *)audio_group;
1045 stream_bitrate += max_audio_bitrate;
1046 av_strlcat(codec_str, ",", sizeof(codec_str));
1047 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1049 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1050 codec_str_ptr = codec_str;
1052 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1053 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1054 playlist_file, agroup,
1055 codec_str_ptr, NULL);
1057 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1059 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
1061 c->master_playlist_created = 1;
1067 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1069 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1071 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1075 static int dash_init(AVFormatContext *s)
1077 DASHContext *c = s->priv_data;
1080 char basename[1024];
1082 if (c->single_file_name)
1085 c->use_template = 0;
1087 #if FF_API_DASH_MIN_SEG_DURATION
1088 if (c->min_seg_duration != 5000000) {
1089 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1090 c->seg_duration = c->min_seg_duration;
1093 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1094 av_log(s, AV_LOG_ERROR,
1095 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1096 return AVERROR_EXPERIMENTAL;
1099 if (c->lhls && !c->streaming) {
1100 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1104 if (c->lhls && !c->hls_playlist) {
1105 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1109 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1110 ptr = strrchr(c->dirname, '/');
1112 av_strlcpy(basename, &ptr[1], sizeof(basename));
1115 c->dirname[0] = '\0';
1116 av_strlcpy(basename, s->url, sizeof(basename));
1119 ptr = strrchr(basename, '.');
1123 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1125 return AVERROR(ENOMEM);
1127 if ((ret = parse_adaptation_sets(s)) < 0)
1130 if ((ret = init_segment_types(s)) < 0)
1133 for (i = 0; i < s->nb_streams; i++) {
1134 OutputStream *os = &c->streams[i];
1135 AdaptationSet *as = &c->as[os->as_idx - 1];
1136 AVFormatContext *ctx;
1138 AVDictionary *opts = NULL;
1139 char filename[1024];
1141 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1142 if (!os->bit_rate) {
1143 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1144 AV_LOG_ERROR : AV_LOG_WARNING;
1145 av_log(s, level, "No bit rate set for stream %d\n", i);
1146 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1147 return AVERROR(EINVAL);
1150 // copy AdaptationSet language and role from stream metadata
1151 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1152 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1154 ctx = avformat_alloc_context();
1156 return AVERROR(ENOMEM);
1158 if (c->init_seg_name) {
1159 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->format_name);
1160 if (!os->init_seg_name)
1161 return AVERROR(ENOMEM);
1163 if (c->media_seg_name) {
1164 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->format_name);
1165 if (!os->media_seg_name)
1166 return AVERROR(ENOMEM);
1168 if (c->single_file_name) {
1169 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->format_name);
1170 if (!os->single_file_name)
1171 return AVERROR(ENOMEM);
1174 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1175 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1176 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1177 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1178 av_log(s, AV_LOG_WARNING,
1179 "One or many segment file names doesn't end with .webm. "
1180 "Override -init_seg_name and/or -media_seg_name and/or "
1181 "-single_file_name to end with the extension .webm\n");
1185 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1187 return AVERROR_MUXER_NOT_FOUND;
1189 ctx->interrupt_callback = s->interrupt_callback;
1190 ctx->opaque = s->opaque;
1191 ctx->io_close = s->io_close;
1192 ctx->io_open = s->io_open;
1193 ctx->strict_std_compliance = s->strict_std_compliance;
1195 if (!(st = avformat_new_stream(ctx, NULL)))
1196 return AVERROR(ENOMEM);
1197 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1198 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1199 st->time_base = s->streams[i]->time_base;
1200 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1201 ctx->avoid_negative_ts = s->avoid_negative_ts;
1202 ctx->flags = s->flags;
1204 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1207 if (c->single_file) {
1208 if (os->single_file_name)
1209 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1211 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1213 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1215 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1216 set_http_options(&opts, c);
1217 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1218 av_dict_free(&opts);
1221 os->init_start_pos = 0;
1223 if (c->format_options_str) {
1224 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1229 if (os->segment_type == SEGMENT_TYPE_MP4) {
1231 // frag_every_frame : Allows lower latency streaming
1232 // skip_sidx : Reduce bitrate overhead
1233 // skip_trailer : Avoids growing memory usage with time
1234 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+skip_sidx+skip_trailer", 0);
1236 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1238 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1239 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1240 av_dict_set_int(&opts, "dash", 1, 0);
1241 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1242 av_dict_set_int(&opts, "live", 1, 0);
1244 ret = avformat_init_output(ctx, &opts);
1245 av_dict_free(&opts);
1249 avio_flush(ctx->pb);
1251 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1253 s->streams[i]->time_base = st->time_base;
1254 // If the muxer wants to shift timestamps, request to have them shifted
1255 // already before being handed to this muxer, so we don't have mismatches
1256 // between the MPD and the actual segments.
1257 s->avoid_negative_ts = ctx->avoid_negative_ts;
1258 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1259 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1260 if (avg_frame_rate.num > 0) {
1261 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1262 as->min_frame_rate = avg_frame_rate;
1263 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1264 as->max_frame_rate = avg_frame_rate;
1266 as->ambiguous_frame_rate = 1;
1271 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1272 sizeof(os->codec_str));
1273 os->first_pts = AV_NOPTS_VALUE;
1274 os->max_pts = AV_NOPTS_VALUE;
1275 os->last_dts = AV_NOPTS_VALUE;
1276 os->segment_index = 1;
1279 if (!c->has_video && c->seg_duration <= 0) {
1280 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1281 return AVERROR(EINVAL);
1286 static int dash_write_header(AVFormatContext *s)
1288 DASHContext *c = s->priv_data;
1290 for (i = 0; i < s->nb_streams; i++) {
1291 OutputStream *os = &c->streams[i];
1292 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1295 // Flush init segment
1296 // Only for WebM segment, since for mp4 delay_moov is set and
1297 // the init segment is thus flushed after the first packets.
1298 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1299 (ret = flush_init_segment(s, os)) < 0)
1305 static int add_segment(OutputStream *os, const char *file,
1306 int64_t time, int64_t duration,
1307 int64_t start_pos, int64_t range_length,
1308 int64_t index_length, int next_exp_index)
1312 if (os->nb_segments >= os->segments_size) {
1313 os->segments_size = (os->segments_size + 1) * 2;
1314 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1315 os->segments_size)) < 0) {
1316 os->segments_size = 0;
1317 os->nb_segments = 0;
1321 seg = av_mallocz(sizeof(*seg));
1323 return AVERROR(ENOMEM);
1324 av_strlcpy(seg->file, file, sizeof(seg->file));
1326 seg->duration = duration;
1327 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1328 seg->duration += seg->time;
1331 seg->start_pos = start_pos;
1332 seg->range_length = range_length;
1333 seg->index_length = index_length;
1334 os->segments[os->nb_segments++] = seg;
1335 os->segment_index++;
1336 //correcting the segment index if it has fallen behind the expected value
1337 if (os->segment_index < next_exp_index) {
1338 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1339 file, os->segment_index, next_exp_index);
1340 os->segment_index = next_exp_index;
1345 static void write_styp(AVIOContext *pb)
1348 ffio_wfourcc(pb, "styp");
1349 ffio_wfourcc(pb, "msdh");
1350 avio_wb32(pb, 0); /* minor */
1351 ffio_wfourcc(pb, "msdh");
1352 ffio_wfourcc(pb, "msix");
1355 static void find_index_range(AVFormatContext *s, const char *full_path,
1356 int64_t pos, int *index_length)
1362 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1365 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1366 ff_format_io_close(s, &pb);
1369 ret = avio_read(pb, buf, 8);
1370 ff_format_io_close(s, &pb);
1373 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1375 *index_length = AV_RB32(&buf[0]);
1378 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1379 AVCodecParameters *par,
1380 AVRational *frame_rate)
1384 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1387 extradata = av_malloc(par->extradata_size);
1390 return AVERROR(ENOMEM);
1392 memcpy(extradata, par->extradata, par->extradata_size);
1394 os->ctx->streams[0]->codecpar->extradata = extradata;
1395 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1397 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1402 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1403 DASHContext *c = s->priv_data;
1404 int http_base_proto = ff_is_http_proto(filename);
1406 if (http_base_proto) {
1407 AVIOContext *out = NULL;
1408 AVDictionary *http_opts = NULL;
1410 set_http_options(&http_opts, c);
1411 av_dict_set(&http_opts, "method", "DELETE", 0);
1413 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1414 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1417 av_dict_free(&http_opts);
1418 ff_format_io_close(s, &out);
1420 int res = avpriv_io_delete(filename);
1422 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1423 av_strerror(res, errbuf, sizeof(errbuf));
1424 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1429 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1431 DASHContext *c = s->priv_data;
1432 size_t dirname_len, file_len;
1433 char filename[1024];
1435 dirname_len = strlen(c->dirname);
1436 if (dirname_len >= sizeof(filename)) {
1437 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the directory path is too long: %"PRIu64" characters: %s\n",
1438 (uint64_t)dirname_len, c->dirname);
1439 return AVERROR(ENAMETOOLONG);
1442 memcpy(filename, c->dirname, dirname_len);
1444 file_len = strlen(file);
1445 if ((dirname_len + file_len) >= sizeof(filename)) {
1446 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the path is too long: %"PRIu64" characters: %s%s\n",
1447 (uint64_t)(dirname_len + file_len), c->dirname, file);
1448 return AVERROR(ENAMETOOLONG);
1451 memcpy(filename + dirname_len, file, file_len + 1); // include the terminating zero
1452 dashenc_delete_file(s, filename);
1457 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1459 for (int i = 0; i < remove_count; ++i) {
1460 dashenc_delete_segment_file(s, os->segments[i]->file);
1462 // Delete the segment regardless of whether the file was successfully deleted
1463 av_free(os->segments[i]);
1466 os->nb_segments -= remove_count;
1467 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1470 static int dash_flush(AVFormatContext *s, int final, int stream)
1472 DASHContext *c = s->priv_data;
1475 const char *proto = avio_find_protocol_name(s->url);
1476 int use_rename = proto && !strcmp(proto, "file");
1478 int cur_flush_segment_index = 0, next_exp_index = -1;
1480 cur_flush_segment_index = c->streams[stream].segment_index;
1482 //finding the next segment's expected index, based on the current pts value
1483 if (c->use_template && !c->use_timeline && c->index_correction &&
1484 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1485 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1486 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1487 c->streams[stream].first_pts,
1488 s->streams[stream]->time_base,
1490 next_exp_index = (pts_diff / c->seg_duration) + 1;
1494 for (i = 0; i < s->nb_streams; i++) {
1495 OutputStream *os = &c->streams[i];
1496 AVStream *st = s->streams[i];
1497 int range_length, index_length = 0;
1499 if (!os->packets_written)
1502 // Flush the single stream that got a keyframe right now.
1503 // Flush all audio streams as well, in sync with video keyframes,
1504 // but not the other video streams.
1505 if (stream >= 0 && i != stream) {
1506 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1508 // Make sure we don't flush audio streams multiple times, when
1509 // all video streams are flushed one at a time.
1510 if (c->has_video && os->segment_index > cur_flush_segment_index)
1514 if (!c->single_file) {
1515 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1516 write_styp(os->ctx->pb);
1518 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1521 ret = flush_dynbuf(os, &range_length);
1524 os->packets_written = 0;
1526 if (c->single_file) {
1527 find_index_range(s, os->full_path, os->pos, &index_length);
1529 dashenc_io_close(s, &os->out, os->temp_path);
1532 ret = avpriv_io_move(os->temp_path, os->full_path);
1538 if (!os->muxer_overhead)
1539 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1541 av_rescale_q(os->max_pts - os->start_pts,
1542 st->time_base, AV_TIME_BASE_Q);
1543 os->total_pkt_size = 0;
1545 if (!os->bit_rate) {
1546 // calculate average bitrate of first segment
1547 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1551 os->bit_rate = bitrate;
1553 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1554 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1556 os->pos += range_length;
1559 if (c->window_size) {
1560 for (i = 0; i < s->nb_streams; i++) {
1561 OutputStream *os = &c->streams[i];
1562 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1563 if (remove_count > 0)
1564 dashenc_delete_media_segments(s, os, remove_count);
1569 ret = write_manifest(s, final);
1573 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1575 DASHContext *c = s->priv_data;
1576 AVStream *st = s->streams[pkt->stream_index];
1577 OutputStream *os = &c->streams[pkt->stream_index];
1578 int64_t seg_end_duration, elapsed_duration;
1581 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1585 // Fill in a heuristic guess of the packet duration, if none is available.
1586 // The mp4 muxer will do something similar (for the last packet in a fragment)
1587 // if nothing is set (setting it for the other packets doesn't hurt).
1588 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1589 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1590 // so that we know the exact timestamps of fragments.
1591 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1592 pkt->duration = pkt->dts - os->last_dts;
1593 os->last_dts = pkt->dts;
1595 // If forcing the stream to start at 0, the mp4 muxer will set the start
1596 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1597 if (os->first_pts == AV_NOPTS_VALUE &&
1598 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1599 pkt->pts -= pkt->dts;
1603 if (os->first_pts == AV_NOPTS_VALUE)
1604 os->first_pts = pkt->pts;
1605 os->last_pts = pkt->pts;
1607 if (!c->availability_start_time[0]) {
1608 int64_t start_time_us = av_gettime();
1609 c->start_time_s = start_time_us / 1000000;
1610 format_date_now(c->availability_start_time,
1611 sizeof(c->availability_start_time));
1614 if (!os->availability_time_offset && pkt->duration) {
1615 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1617 os->availability_time_offset = ((double) c->seg_duration -
1618 frame_duration) / AV_TIME_BASE;
1621 if (c->use_template && !c->use_timeline) {
1622 elapsed_duration = pkt->pts - os->first_pts;
1623 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1625 elapsed_duration = pkt->pts - os->start_pts;
1626 seg_end_duration = c->seg_duration;
1629 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1630 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1631 av_compare_ts(elapsed_duration, st->time_base,
1632 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1633 int64_t prev_duration = c->last_duration;
1635 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1638 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1642 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1643 if (c->last_duration < prev_duration*9/10 ||
1644 c->last_duration > prev_duration*11/10) {
1645 av_log(s, AV_LOG_WARNING,
1646 "Segment durations differ too much, enable use_timeline "
1647 "and use_template, or keep a stricter keyframe interval\n");
1651 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1655 if (!os->packets_written) {
1656 // If we wrote a previous segment, adjust the start time of the segment
1657 // to the end of the previous one (which is the same as the mp4 muxer
1658 // does). This avoids gaps in the timeline.
1659 if (os->max_pts != AV_NOPTS_VALUE)
1660 os->start_pts = os->max_pts;
1662 os->start_pts = pkt->pts;
1664 if (os->max_pts == AV_NOPTS_VALUE)
1665 os->max_pts = pkt->pts + pkt->duration;
1667 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1668 os->packets_written++;
1669 os->total_pkt_size += pkt->size;
1670 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1673 if (!os->init_range_length)
1674 flush_init_segment(s, os);
1676 //open the output context when the first frame of a segment is ready
1677 if (!c->single_file && os->packets_written == 1) {
1678 AVDictionary *opts = NULL;
1679 const char *proto = avio_find_protocol_name(s->url);
1680 int use_rename = proto && !strcmp(proto, "file");
1681 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1682 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1683 os->media_seg_name, pkt->stream_index,
1684 os->segment_index, os->bit_rate, os->start_pts);
1685 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1687 snprintf(os->temp_path, sizeof(os->temp_path),
1688 use_rename ? "%s.tmp" : "%s", os->full_path);
1689 set_http_options(&opts, c);
1690 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1691 av_dict_free(&opts);
1693 return handle_io_open_error(s, ret, os->temp_path);
1696 char *prefetch_url = use_rename ? NULL : os->filename;
1697 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
1701 //write out the data immediately in streaming mode
1702 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1704 uint8_t *buf = NULL;
1705 if (!os->written_len)
1706 write_styp(os->ctx->pb);
1707 avio_flush(os->ctx->pb);
1708 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1710 avio_write(os->out, buf + os->written_len, len - os->written_len);
1711 avio_flush(os->out);
1713 os->written_len = len;
1719 static int dash_write_trailer(AVFormatContext *s)
1721 DASHContext *c = s->priv_data;
1724 if (s->nb_streams > 0) {
1725 OutputStream *os = &c->streams[0];
1726 // If no segments have been written so far, try to do a crude
1727 // guess of the segment duration
1728 if (!c->last_duration)
1729 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1730 s->streams[0]->time_base,
1732 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1733 s->streams[0]->time_base,
1736 dash_flush(s, 1, -1);
1738 for (i = 0; i < s->nb_streams; ++i) {
1739 OutputStream *os = &c->streams[i];
1740 if (os->ctx && os->ctx_inited) {
1741 av_write_trailer(os->ctx);
1744 if (c->remove_at_exit) {
1745 dashenc_delete_media_segments(s, os, os->nb_segments);
1746 dashenc_delete_segment_file(s, os->initfile);
1750 if (c->remove_at_exit) {
1751 dashenc_delete_file(s, s->url);
1753 if (c->hls_playlist && c->master_playlist_created) {
1754 char filename[1024];
1755 for (i = 0; i < s->nb_streams; ++i) {
1756 OutputStream *os = &c->streams[i];
1757 if (os->segment_type == SEGMENT_TYPE_MP4) {
1758 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
1759 dashenc_delete_file(s, filename);
1762 snprintf(filename, sizeof(filename), "%smaster.m3u8", c->dirname);
1763 dashenc_delete_file(s, filename);
1770 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1772 DASHContext *c = s->priv_data;
1773 OutputStream *os = &c->streams[avpkt->stream_index];
1774 AVFormatContext *oc = os->ctx;
1775 if (oc->oformat->check_bitstream) {
1777 AVPacket pkt = *avpkt;
1778 pkt.stream_index = 0;
1779 ret = oc->oformat->check_bitstream(oc, &pkt);
1781 AVStream *st = s->streams[avpkt->stream_index];
1782 AVStream *ost = oc->streams[0];
1783 st->internal->bsfcs = ost->internal->bsfcs;
1784 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1785 ost->internal->bsfcs = NULL;
1786 ost->internal->nb_bsfcs = 0;
1793 #define OFFSET(x) offsetof(DASHContext, x)
1794 #define E AV_OPT_FLAG_ENCODING_PARAM
1795 static const AVOption options[] = {
1796 { "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 },
1797 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1798 { "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 },
1799 #if FF_API_DASH_MIN_SEG_DURATION
1800 { "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 },
1802 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1803 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1804 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1805 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1806 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1807 { "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 },
1808 { "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 },
1809 { "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 },
1810 { "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 },
1811 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1812 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1813 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1814 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1815 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1816 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1817 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1818 { "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},
1819 { "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"},
1820 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1821 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1822 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1823 { "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 },
1824 { "lhls", "Enable Low-latency HLS(Experimental). Adds #EXT-X-PREFETCH tag with current segment's URI", OFFSET(lhls), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1825 { "master_m3u8_publish_rate", "Publish master playlist every after this many segment intervals", OFFSET(master_publish_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, UINT_MAX, E},
1829 static const AVClass dash_class = {
1830 .class_name = "dash muxer",
1831 .item_name = av_default_item_name,
1833 .version = LIBAVUTIL_VERSION_INT,
1836 AVOutputFormat ff_dash_muxer = {
1838 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1839 .extensions = "mpd",
1840 .priv_data_size = sizeof(DASHContext),
1841 .audio_codec = AV_CODEC_ID_AAC,
1842 .video_codec = AV_CODEC_ID_H264,
1843 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1845 .write_header = dash_write_header,
1846 .write_packet = dash_write_packet,
1847 .write_trailer = dash_write_trailer,
1848 .deinit = dash_free,
1849 .check_bitstream = dash_check_bitstream,
1850 .priv_class = &dash_class,