2 * MPEG-DASH ISO BMFF segmenter
3 * Copyright (c) 2014 Martin Storsjo
4 * Copyright (c) 2018 Akamai Technologies, Inc.
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "libavutil/avassert.h"
29 #include "libavutil/avutil.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/rational.h"
35 #include "libavutil/time_internal.h"
39 #include "avio_internal.h"
40 #include "hlsplaylist.h"
41 #if CONFIG_HTTP_PROTOCOL
46 #include "os_support.h"
52 SEGMENT_TYPE_AUTO = 0,
58 typedef struct Segment {
61 int range_length, index_length;
67 typedef struct AdaptationSet {
69 enum AVMediaType media_type;
70 AVDictionary *metadata;
71 AVRational min_frame_rate, max_frame_rate;
72 int ambiguous_frame_rate;
75 typedef struct OutputStream {
77 int ctx_inited, as_idx;
81 int64_t init_start_pos, pos;
82 int init_range_length;
83 int nb_segments, segments_size, segment_index;
85 int64_t first_pts, start_pts, max_pts;
86 int64_t last_dts, last_pts;
88 SegmentType segment_type; /* segment type selected for this particular stream */
89 const char *format_name;
90 const char *single_file_name; /* file names selected for this particular stream */
91 const char *init_seg_name;
92 const char *media_seg_name;
99 double availability_time_offset;
104 typedef struct DASHContext {
105 const AVClass *class; /* Class for private options. */
106 char *adaptation_sets;
110 int extra_window_size;
111 #if FF_API_DASH_MIN_SEG_DURATION
112 int min_seg_duration;
114 int64_t seg_duration;
119 OutputStream *streams;
121 int64_t last_duration;
122 int64_t total_duration;
123 char availability_start_time[100];
125 const char *single_file_name; /* file names as specified in options */
126 const char *init_seg_name;
127 const char *media_seg_name;
128 const char *utc_timing_url;
130 const char *user_agent;
133 int master_playlist_created;
134 AVIOContext *mpd_out;
135 AVIOContext *m3u8_out;
138 int index_correction;
139 char *format_options_str;
140 SegmentType segment_type_option; /* segment type as specified in options */
141 int ignore_io_errors;
144 static struct codec_string {
148 { AV_CODEC_ID_VP8, "vp8" },
149 { AV_CODEC_ID_VP9, "vp9" },
150 { AV_CODEC_ID_VORBIS, "vorbis" },
151 { AV_CODEC_ID_OPUS, "opus" },
152 { AV_CODEC_ID_FLAC, "flac" },
156 static struct format_string {
157 SegmentType segment_type;
160 { SEGMENT_TYPE_AUTO, "auto" },
161 { SEGMENT_TYPE_MP4, "mp4" },
162 { SEGMENT_TYPE_WEBM, "webm" },
166 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
167 AVDictionary **options) {
168 DASHContext *c = s->priv_data;
169 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
170 int err = AVERROR_MUXER_NOT_FOUND;
171 if (!*pb || !http_base_proto || !c->http_persistent) {
172 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
173 #if CONFIG_HTTP_PROTOCOL
175 URLContext *http_url_context = ffio_geturlcontext(*pb);
176 av_assert0(http_url_context);
177 err = ff_http_do_new_request(http_url_context, filename);
179 ff_format_io_close(s, pb);
185 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
186 DASHContext *c = s->priv_data;
187 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
192 if (!http_base_proto || !c->http_persistent) {
193 ff_format_io_close(s, pb);
194 #if CONFIG_HTTP_PROTOCOL
196 URLContext *http_url_context = ffio_geturlcontext(*pb);
197 av_assert0(http_url_context);
199 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
204 static const char *get_format_str(SegmentType segment_type) {
206 for (i = 0; i < SEGMENT_TYPE_NB; i++)
207 if (formats[i].segment_type == segment_type)
208 return formats[i].str;
212 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
213 DASHContext *c = s->priv_data;
214 char errbuf[AV_ERROR_MAX_STRING_SIZE];
215 av_strerror(err, errbuf, sizeof(errbuf));
216 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
217 "Unable to open %s for writing: %s\n", url, errbuf);
218 return c->ignore_io_errors ? 0 : err;
221 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
223 if (segment_type == SEGMENT_TYPE_AUTO) {
224 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
225 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
226 segment_type = SEGMENT_TYPE_WEBM;
228 segment_type = SEGMENT_TYPE_MP4;
235 static int init_segment_types(AVFormatContext *s)
237 DASHContext *c = s->priv_data;
238 int has_mp4_streams = 0;
239 for (int i = 0; i < s->nb_streams; ++i) {
240 OutputStream *os = &c->streams[i];
241 SegmentType segment_type = select_segment_type(
242 c->segment_type_option, s->streams[i]->codecpar->codec_id);
243 os->segment_type = segment_type;
244 os->format_name = get_format_str(segment_type);
245 if (!os->format_name) {
246 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
247 return AVERROR_MUXER_NOT_FOUND;
249 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
252 if (c->hls_playlist && !has_mp4_streams) {
253 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
260 static int check_file_extension(const char *filename, const char *extension) {
262 if (!filename || !extension)
264 dot = strrchr(filename, '.');
265 if (dot && !strcmp(dot + 1, extension))
270 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
271 AVRational *frame_rate, char *str, int size) {
273 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
275 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
276 vpcc.profile, vpcc.level, vpcc.bitdepth);
278 // Default to just vp9 in case of error while finding out profile or level
279 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
280 av_strlcpy(str, "vp9", size);
285 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
286 AVRational *frame_rate, char *str, int size)
288 const AVCodecTag *tags[2] = { NULL, NULL };
292 // common Webm codecs are not part of RFC 6381
293 for (i = 0; codecs[i].id; i++)
294 if (codecs[i].id == par->codec_id) {
295 if (codecs[i].id == AV_CODEC_ID_VP9) {
296 set_vp9_codec_str(s, par, frame_rate, str, size);
298 av_strlcpy(str, codecs[i].str, size);
303 // for codecs part of RFC 6381
304 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
305 tags[0] = ff_codec_movvideo_tags;
306 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
307 tags[0] = ff_codec_movaudio_tags;
311 tag = par->codec_tag;
313 tag = av_codec_get_tag(tags, par->codec_id);
321 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
323 tags[0] = ff_mp4_obj_type;
324 oti = av_codec_get_tag(tags, par->codec_id);
326 av_strlcatf(str, size, ".%02"PRIx32, oti);
330 if (tag == MKTAG('m', 'p', '4', 'a')) {
331 if (par->extradata_size >= 2) {
332 int aot = par->extradata[0] >> 3;
334 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
335 av_strlcatf(str, size, ".%d", aot);
337 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
338 // Unimplemented, should output ProfileLevelIndication as a decimal number
339 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
341 } else if (!strcmp(str, "avc1")) {
342 uint8_t *tmpbuf = NULL;
343 uint8_t *extradata = par->extradata;
344 int extradata_size = par->extradata_size;
347 if (extradata[0] != 1) {
349 if (avio_open_dyn_buf(&pb) < 0)
351 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
352 ffio_free_dyn_buf(&pb);
355 extradata_size = avio_close_dyn_buf(pb, &extradata);
359 if (extradata_size >= 4)
360 av_strlcatf(str, size, ".%02x%02x%02x",
361 extradata[1], extradata[2], extradata[3]);
366 static int flush_dynbuf(OutputStream *os, int *range_length)
371 return AVERROR(EINVAL);
375 av_write_frame(os->ctx, NULL);
376 avio_flush(os->ctx->pb);
379 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
382 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
387 return avio_open_dyn_buf(&os->ctx->pb);
390 static void set_http_options(AVDictionary **options, DASHContext *c)
393 av_dict_set(options, "method", c->method, 0);
395 av_dict_set(options, "user_agent", c->user_agent, 0);
396 if (c->http_persistent)
397 av_dict_set_int(options, "multiple_requests", 1, 0);
399 av_dict_set_int(options, "timeout", c->timeout, 0);
402 static void get_hls_playlist_name(char *playlist_name, int string_size,
403 const char *base_url, int id) {
405 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
407 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
410 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
412 DASHContext *c = s->priv_data;
413 int ret, range_length;
415 ret = flush_dynbuf(os, &range_length);
419 os->pos = os->init_range_length = range_length;
420 if (!c->single_file) {
422 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
423 dashenc_io_close(s, &os->out, filename);
428 static void dash_free(AVFormatContext *s)
430 DASHContext *c = s->priv_data;
434 for (i = 0; i < c->nb_as; i++)
435 av_dict_free(&c->as[i].metadata);
442 for (i = 0; i < s->nb_streams; i++) {
443 OutputStream *os = &c->streams[i];
444 if (os->ctx && os->ctx->pb)
445 ffio_free_dyn_buf(&os->ctx->pb);
446 ff_format_io_close(s, &os->out);
448 avformat_free_context(os->ctx);
449 for (j = 0; j < os->nb_segments; j++)
450 av_free(os->segments[j]);
451 av_free(os->segments);
452 av_freep(&os->single_file_name);
453 av_freep(&os->init_seg_name);
454 av_freep(&os->media_seg_name);
456 av_freep(&c->streams);
458 ff_format_io_close(s, &c->mpd_out);
459 ff_format_io_close(s, &c->m3u8_out);
462 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
463 int representation_id, int final)
465 DASHContext *c = s->priv_data;
466 int i, start_index = 0, start_number = 1;
467 if (c->window_size) {
468 start_index = FFMAX(os->nb_segments - c->window_size, 0);
469 start_number = FFMAX(os->segment_index - c->window_size, 1);
472 if (c->use_template) {
473 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
474 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
475 if (!c->use_timeline) {
476 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
477 if (c->streaming && os->availability_time_offset)
478 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
479 os->availability_time_offset);
481 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
482 if (c->use_timeline) {
483 int64_t cur_time = 0;
484 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
485 for (i = start_index; i < os->nb_segments; ) {
486 Segment *seg = os->segments[i];
488 avio_printf(out, "\t\t\t\t\t\t<S ");
489 if (i == start_index || seg->time != cur_time) {
490 cur_time = seg->time;
491 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
493 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
494 while (i + repeat + 1 < os->nb_segments &&
495 os->segments[i + repeat + 1]->duration == seg->duration &&
496 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
499 avio_printf(out, "r=\"%d\" ", repeat);
500 avio_printf(out, "/>\n");
502 cur_time += (1 + repeat) * seg->duration;
504 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
506 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
507 } else if (c->single_file) {
508 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
509 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
510 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);
511 for (i = start_index; i < os->nb_segments; i++) {
512 Segment *seg = os->segments[i];
513 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
514 if (seg->index_length)
515 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
516 avio_printf(out, "/>\n");
518 avio_printf(out, "\t\t\t\t</SegmentList>\n");
520 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
521 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
522 for (i = start_index; i < os->nb_segments; i++) {
523 Segment *seg = os->segments[i];
524 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
526 avio_printf(out, "\t\t\t\t</SegmentList>\n");
528 if (c->hls_playlist && start_index < os->nb_segments && os->segment_type == SEGMENT_TYPE_MP4)
530 int timescale = os->ctx->streams[0]->time_base.den;
531 char temp_filename_hls[1024];
532 char filename_hls[1024];
533 AVDictionary *http_opts = NULL;
534 int target_duration = 0;
536 const char *proto = avio_find_protocol_name(c->dirname);
537 int use_rename = proto && !strcmp(proto, "file");
539 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
540 c->dirname, representation_id);
542 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
544 set_http_options(&http_opts, c);
545 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
546 av_dict_free(&http_opts);
548 handle_io_open_error(s, ret, temp_filename_hls);
551 for (i = start_index; i < os->nb_segments; i++) {
552 Segment *seg = os->segments[i];
553 double duration = (double) seg->duration / timescale;
554 if (target_duration <= duration)
555 target_duration = lrint(duration);
558 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
559 start_number, PLAYLIST_TYPE_NONE);
561 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
562 os->init_range_length, os->init_start_pos);
564 for (i = start_index; i < os->nb_segments; i++) {
565 Segment *seg = os->segments[i];
566 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
567 (double) seg->duration / timescale, 0,
568 seg->range_length, seg->start_pos, NULL,
569 c->single_file ? os->initfile : seg->file,
572 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
577 ff_hls_write_end_list(c->m3u8_out);
579 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
582 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
583 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
589 static char *xmlescape(const char *str) {
590 int outlen = strlen(str)*3/2 + 6;
591 char *out = av_realloc(NULL, outlen + 1);
595 for (; *str; str++) {
596 if (pos + 6 > outlen) {
598 outlen = 2 * outlen + 6;
599 tmp = av_realloc(out, outlen + 1);
607 memcpy(&out[pos], "&", 5);
609 } else if (*str == '<') {
610 memcpy(&out[pos], "<", 4);
612 } else if (*str == '>') {
613 memcpy(&out[pos], ">", 4);
615 } else if (*str == '\'') {
616 memcpy(&out[pos], "'", 6);
618 } else if (*str == '\"') {
619 memcpy(&out[pos], """, 6);
629 static void write_time(AVIOContext *out, int64_t time)
631 int seconds = time / AV_TIME_BASE;
632 int fractions = time % AV_TIME_BASE;
633 int minutes = seconds / 60;
634 int hours = minutes / 60;
637 avio_printf(out, "PT");
639 avio_printf(out, "%dH", hours);
640 if (hours || minutes)
641 avio_printf(out, "%dM", minutes);
642 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
645 static void format_date_now(char *buf, int size)
647 time_t t = time(NULL);
648 struct tm *ptm, tmbuf;
649 ptm = gmtime_r(&t, &tmbuf);
651 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm))
656 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
659 DASHContext *c = s->priv_data;
660 AdaptationSet *as = &c->as[as_index];
661 AVDictionaryEntry *lang, *role;
664 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
665 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
666 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)
667 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
668 lang = av_dict_get(as->metadata, "language", NULL, 0);
670 avio_printf(out, " lang=\"%s\"", lang->value);
671 avio_printf(out, ">\n");
673 role = av_dict_get(as->metadata, "role", NULL, 0);
675 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
677 for (i = 0; i < s->nb_streams; i++) {
678 OutputStream *os = &c->streams[i];
679 char bandwidth_str[64] = {'\0'};
681 if (os->as_idx - 1 != as_index)
684 if (os->bit_rate > 0)
685 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
688 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
689 AVStream *st = s->streams[i];
690 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
691 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
692 if (st->avg_frame_rate.num)
693 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
694 avio_printf(out, ">\n");
696 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
697 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
698 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
699 s->streams[i]->codecpar->channels);
701 output_segment_list(os, out, s, i, final);
702 avio_printf(out, "\t\t\t</Representation>\n");
704 avio_printf(out, "\t\t</AdaptationSet>\n");
709 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
711 DASHContext *c = s->priv_data;
713 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
715 return AVERROR(ENOMEM);
719 *as = &c->as[c->nb_as - 1];
720 memset(*as, 0, sizeof(**as));
721 (*as)->media_type = type;
726 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
728 DASHContext *c = s->priv_data;
729 AdaptationSet *as = &c->as[as_idx - 1];
730 OutputStream *os = &c->streams[i];
732 if (as->media_type != s->streams[i]->codecpar->codec_type) {
733 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
734 return AVERROR(EINVAL);
735 } else if (os->as_idx) {
736 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
737 return AVERROR(EINVAL);
744 static int parse_adaptation_sets(AVFormatContext *s)
746 DASHContext *c = s->priv_data;
747 const char *p = c->adaptation_sets;
748 enum { new_set, parse_id, parsing_streams } state;
752 // default: one AdaptationSet for each stream
754 for (i = 0; i < s->nb_streams; i++) {
755 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
757 snprintf(as->id, sizeof(as->id), "%d", i);
759 c->streams[i].as_idx = c->nb_as;
764 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
770 } else if (state == new_set && av_strstart(p, "id=", &p)) {
772 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
776 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
782 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
783 state = parsing_streams;
784 } else if (state == parsing_streams) {
785 AdaptationSet *as = &c->as[c->nb_as - 1];
786 char idx_str[8], *end_str;
788 n = strcspn(p, " ,");
789 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
792 // if value is "a" or "v", map all streams of that type
793 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
794 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
795 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
797 for (i = 0; i < s->nb_streams; i++) {
798 if (s->streams[i]->codecpar->codec_type != type)
801 as->media_type = s->streams[i]->codecpar->codec_type;
803 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
806 } else { // select single stream
807 i = strtol(idx_str, &end_str, 10);
808 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
809 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
810 return AVERROR(EINVAL);
812 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
814 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
815 as->media_type = s->streams[i]->codecpar->codec_type;
818 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
827 return AVERROR(EINVAL);
832 // check for unassigned streams
833 for (i = 0; i < s->nb_streams; i++) {
834 OutputStream *os = &c->streams[i];
836 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
837 return AVERROR(EINVAL);
843 static int write_manifest(AVFormatContext *s, int final)
845 DASHContext *c = s->priv_data;
847 char temp_filename[1024];
849 const char *proto = avio_find_protocol_name(s->url);
850 int use_rename = proto && !strcmp(proto, "file");
851 static unsigned int warned_non_file = 0;
852 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
853 AVDictionary *opts = NULL;
855 if (!use_rename && !warned_non_file++)
856 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
858 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
859 set_http_options(&opts, c);
860 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
863 return handle_io_open_error(s, ret, temp_filename);
866 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
867 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
868 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
869 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
870 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
871 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
872 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
874 avio_printf(out, "\tmediaPresentationDuration=\"");
875 write_time(out, c->total_duration);
876 avio_printf(out, "\"\n");
878 int64_t update_period = c->last_duration / AV_TIME_BASE;
880 if (c->use_template && !c->use_timeline)
882 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
883 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
884 if (c->availability_start_time[0])
885 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
886 format_date_now(now_str, sizeof(now_str));
888 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
889 if (c->window_size && c->use_template) {
890 avio_printf(out, "\ttimeShiftBufferDepth=\"");
891 write_time(out, c->last_duration * c->window_size);
892 avio_printf(out, "\"\n");
895 avio_printf(out, "\tminBufferTime=\"");
896 write_time(out, c->last_duration * 2);
897 avio_printf(out, "\">\n");
898 avio_printf(out, "\t<ProgramInformation>\n");
900 char *escaped = xmlescape(title->value);
901 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
904 avio_printf(out, "\t</ProgramInformation>\n");
906 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
907 OutputStream *os = &c->streams[0];
908 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
909 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
910 avio_printf(out, "\t<Period id=\"0\" start=\"");
911 write_time(out, start_time);
912 avio_printf(out, "\">\n");
914 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
917 for (i = 0; i < c->nb_as; i++) {
918 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
921 avio_printf(out, "\t</Period>\n");
923 if (c->utc_timing_url)
924 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
926 avio_printf(out, "</MPD>\n");
928 dashenc_io_close(s, &c->mpd_out, temp_filename);
931 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
935 if (c->hls_playlist && !c->master_playlist_created) {
936 char filename_hls[1024];
937 const char *audio_group = "A1";
938 char audio_codec_str[128] = "\0";
940 int max_audio_bitrate = 0;
943 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
945 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
947 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
949 set_http_options(&opts, c);
950 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
953 return handle_io_open_error(s, ret, temp_filename);
956 ff_hls_write_playlist_version(c->m3u8_out, 7);
958 for (i = 0; i < s->nb_streams; i++) {
959 char playlist_file[64];
960 AVStream *st = s->streams[i];
961 OutputStream *os = &c->streams[i];
962 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
964 if (os->segment_type != SEGMENT_TYPE_MP4)
966 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
967 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
968 playlist_file, i, is_default);
969 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
970 os->muxer_overhead, max_audio_bitrate);
971 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
972 if (strlen(audio_codec_str))
973 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
974 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
979 for (i = 0; i < s->nb_streams; i++) {
980 char playlist_file[64];
982 AVStream *st = s->streams[i];
983 OutputStream *os = &c->streams[i];
985 char *codec_str_ptr = NULL;
986 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
987 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
989 if (os->segment_type != SEGMENT_TYPE_MP4)
991 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
992 if (max_audio_bitrate) {
993 agroup = (char *)audio_group;
994 stream_bitrate += max_audio_bitrate;
995 av_strlcat(codec_str, ",", sizeof(codec_str));
996 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
998 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
999 codec_str_ptr = codec_str;
1001 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1002 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1003 playlist_file, agroup,
1004 codec_str_ptr, NULL);
1006 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1008 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
1010 c->master_playlist_created = 1;
1016 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1018 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1020 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1024 static int dash_init(AVFormatContext *s)
1026 DASHContext *c = s->priv_data;
1029 char basename[1024];
1031 if (c->single_file_name)
1034 c->use_template = 0;
1036 #if FF_API_DASH_MIN_SEG_DURATION
1037 if (c->min_seg_duration != 5000000) {
1038 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1039 c->seg_duration = c->min_seg_duration;
1043 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1044 ptr = strrchr(c->dirname, '/');
1046 av_strlcpy(basename, &ptr[1], sizeof(basename));
1049 c->dirname[0] = '\0';
1050 av_strlcpy(basename, s->url, sizeof(basename));
1053 ptr = strrchr(basename, '.');
1057 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1059 return AVERROR(ENOMEM);
1061 if ((ret = parse_adaptation_sets(s)) < 0)
1064 if ((ret = init_segment_types(s)) < 0)
1067 for (i = 0; i < s->nb_streams; i++) {
1068 OutputStream *os = &c->streams[i];
1069 AdaptationSet *as = &c->as[os->as_idx - 1];
1070 AVFormatContext *ctx;
1072 AVDictionary *opts = NULL;
1073 char filename[1024];
1075 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1076 if (!os->bit_rate) {
1077 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1078 AV_LOG_ERROR : AV_LOG_WARNING;
1079 av_log(s, level, "No bit rate set for stream %d\n", i);
1080 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1081 return AVERROR(EINVAL);
1084 // copy AdaptationSet language and role from stream metadata
1085 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1086 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1088 ctx = avformat_alloc_context();
1090 return AVERROR(ENOMEM);
1092 if (c->init_seg_name) {
1093 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->format_name);
1094 if (!os->init_seg_name)
1095 return AVERROR(ENOMEM);
1097 if (c->media_seg_name) {
1098 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->format_name);
1099 if (!os->media_seg_name)
1100 return AVERROR(ENOMEM);
1102 if (c->single_file_name) {
1103 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->format_name);
1104 if (!os->single_file_name)
1105 return AVERROR(ENOMEM);
1108 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1109 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1110 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1111 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1112 av_log(s, AV_LOG_WARNING,
1113 "One or many segment file names doesn't end with .webm. "
1114 "Override -init_seg_name and/or -media_seg_name and/or "
1115 "-single_file_name to end with the extension .webm\n");
1119 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1121 return AVERROR_MUXER_NOT_FOUND;
1123 ctx->interrupt_callback = s->interrupt_callback;
1124 ctx->opaque = s->opaque;
1125 ctx->io_close = s->io_close;
1126 ctx->io_open = s->io_open;
1127 ctx->strict_std_compliance = s->strict_std_compliance;
1129 if (!(st = avformat_new_stream(ctx, NULL)))
1130 return AVERROR(ENOMEM);
1131 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1132 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1133 st->time_base = s->streams[i]->time_base;
1134 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1135 ctx->avoid_negative_ts = s->avoid_negative_ts;
1136 ctx->flags = s->flags;
1138 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1141 if (c->single_file) {
1142 if (os->single_file_name)
1143 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1145 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1147 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1149 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1150 set_http_options(&opts, c);
1151 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1152 av_dict_free(&opts);
1155 os->init_start_pos = 0;
1157 if (c->format_options_str) {
1158 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1163 if (os->segment_type == SEGMENT_TYPE_MP4) {
1165 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+global_sidx", 0);
1167 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
1169 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1170 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1171 av_dict_set_int(&opts, "dash", 1, 0);
1172 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1173 av_dict_set_int(&opts, "live", 1, 0);
1175 ret = avformat_init_output(ctx, &opts);
1176 av_dict_free(&opts);
1180 avio_flush(ctx->pb);
1182 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1184 s->streams[i]->time_base = st->time_base;
1185 // If the muxer wants to shift timestamps, request to have them shifted
1186 // already before being handed to this muxer, so we don't have mismatches
1187 // between the MPD and the actual segments.
1188 s->avoid_negative_ts = ctx->avoid_negative_ts;
1189 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1190 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1191 if (avg_frame_rate.num > 0) {
1192 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1193 as->min_frame_rate = avg_frame_rate;
1194 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1195 as->max_frame_rate = avg_frame_rate;
1197 as->ambiguous_frame_rate = 1;
1202 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1203 sizeof(os->codec_str));
1204 os->first_pts = AV_NOPTS_VALUE;
1205 os->max_pts = AV_NOPTS_VALUE;
1206 os->last_dts = AV_NOPTS_VALUE;
1207 os->segment_index = 1;
1210 if (!c->has_video && c->seg_duration <= 0) {
1211 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1212 return AVERROR(EINVAL);
1217 static int dash_write_header(AVFormatContext *s)
1219 DASHContext *c = s->priv_data;
1221 for (i = 0; i < s->nb_streams; i++) {
1222 OutputStream *os = &c->streams[i];
1223 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1226 // Flush init segment
1227 // Only for WebM segment, since for mp4 delay_moov is set and
1228 // the init segment is thus flushed after the first packets.
1229 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1230 (ret = flush_init_segment(s, os)) < 0)
1236 static int add_segment(OutputStream *os, const char *file,
1237 int64_t time, int64_t duration,
1238 int64_t start_pos, int64_t range_length,
1239 int64_t index_length, int next_exp_index)
1243 if (os->nb_segments >= os->segments_size) {
1244 os->segments_size = (os->segments_size + 1) * 2;
1245 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1246 os->segments_size)) < 0) {
1247 os->segments_size = 0;
1248 os->nb_segments = 0;
1252 seg = av_mallocz(sizeof(*seg));
1254 return AVERROR(ENOMEM);
1255 av_strlcpy(seg->file, file, sizeof(seg->file));
1257 seg->duration = duration;
1258 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1259 seg->duration += seg->time;
1262 seg->start_pos = start_pos;
1263 seg->range_length = range_length;
1264 seg->index_length = index_length;
1265 os->segments[os->nb_segments++] = seg;
1266 os->segment_index++;
1267 //correcting the segment index if it has fallen behind the expected value
1268 if (os->segment_index < next_exp_index) {
1269 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1270 file, os->segment_index, next_exp_index);
1271 os->segment_index = next_exp_index;
1276 static void write_styp(AVIOContext *pb)
1279 ffio_wfourcc(pb, "styp");
1280 ffio_wfourcc(pb, "msdh");
1281 avio_wb32(pb, 0); /* minor */
1282 ffio_wfourcc(pb, "msdh");
1283 ffio_wfourcc(pb, "msix");
1286 static void find_index_range(AVFormatContext *s, const char *full_path,
1287 int64_t pos, int *index_length)
1293 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1296 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1297 ff_format_io_close(s, &pb);
1300 ret = avio_read(pb, buf, 8);
1301 ff_format_io_close(s, &pb);
1304 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1306 *index_length = AV_RB32(&buf[0]);
1309 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1310 AVCodecParameters *par,
1311 AVRational *frame_rate)
1315 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1318 extradata = av_malloc(par->extradata_size);
1321 return AVERROR(ENOMEM);
1323 memcpy(extradata, par->extradata, par->extradata_size);
1325 os->ctx->streams[0]->codecpar->extradata = extradata;
1326 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1328 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1333 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1334 DASHContext *c = s->priv_data;
1335 int http_base_proto = ff_is_http_proto(filename);
1337 if (http_base_proto) {
1338 AVIOContext *out = NULL;
1339 AVDictionary *http_opts = NULL;
1341 set_http_options(&http_opts, c);
1342 av_dict_set(&http_opts, "method", "DELETE", 0);
1344 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1345 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1348 av_dict_free(&http_opts);
1349 ff_format_io_close(s, &out);
1351 int res = avpriv_io_delete(filename);
1353 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1354 av_strerror(res, errbuf, sizeof(errbuf));
1355 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1360 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1362 DASHContext *c = s->priv_data;
1363 size_t dirname_len, file_len;
1364 char filename[1024];
1366 dirname_len = strlen(c->dirname);
1367 if (dirname_len >= sizeof(filename)) {
1368 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the directory path is too long: %"PRIu64" characters: %s\n",
1369 (uint64_t)dirname_len, c->dirname);
1370 return AVERROR(ENAMETOOLONG);
1373 memcpy(filename, c->dirname, dirname_len);
1375 file_len = strlen(file);
1376 if ((dirname_len + file_len) >= sizeof(filename)) {
1377 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the path is too long: %"PRIu64" characters: %s%s\n",
1378 (uint64_t)(dirname_len + file_len), c->dirname, file);
1379 return AVERROR(ENAMETOOLONG);
1382 memcpy(filename + dirname_len, file, file_len + 1); // include the terminating zero
1383 dashenc_delete_file(s, filename);
1388 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1390 for (int i = 0; i < remove_count; ++i) {
1391 dashenc_delete_segment_file(s, os->segments[i]->file);
1393 // Delete the segment regardless of whether the file was successfully deleted
1394 av_free(os->segments[i]);
1397 os->nb_segments -= remove_count;
1398 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1401 static int dash_flush(AVFormatContext *s, int final, int stream)
1403 DASHContext *c = s->priv_data;
1406 const char *proto = avio_find_protocol_name(s->url);
1407 int use_rename = proto && !strcmp(proto, "file");
1409 int cur_flush_segment_index = 0, next_exp_index = -1;
1411 cur_flush_segment_index = c->streams[stream].segment_index;
1413 //finding the next segment's expected index, based on the current pts value
1414 if (c->use_template && !c->use_timeline && c->index_correction &&
1415 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1416 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1417 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1418 c->streams[stream].first_pts,
1419 s->streams[stream]->time_base,
1421 next_exp_index = (pts_diff / c->seg_duration) + 1;
1425 for (i = 0; i < s->nb_streams; i++) {
1426 OutputStream *os = &c->streams[i];
1427 AVStream *st = s->streams[i];
1428 int range_length, index_length = 0;
1430 if (!os->packets_written)
1433 // Flush the single stream that got a keyframe right now.
1434 // Flush all audio streams as well, in sync with video keyframes,
1435 // but not the other video streams.
1436 if (stream >= 0 && i != stream) {
1437 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1439 // Make sure we don't flush audio streams multiple times, when
1440 // all video streams are flushed one at a time.
1441 if (c->has_video && os->segment_index > cur_flush_segment_index)
1445 if (!c->single_file) {
1446 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1447 write_styp(os->ctx->pb);
1449 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1452 ret = flush_dynbuf(os, &range_length);
1455 os->packets_written = 0;
1457 if (c->single_file) {
1458 find_index_range(s, os->full_path, os->pos, &index_length);
1460 dashenc_io_close(s, &os->out, os->temp_path);
1463 ret = avpriv_io_move(os->temp_path, os->full_path);
1469 if (!os->muxer_overhead)
1470 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1472 av_rescale_q(os->max_pts - os->start_pts,
1473 st->time_base, AV_TIME_BASE_Q);
1474 os->total_pkt_size = 0;
1476 if (!os->bit_rate) {
1477 // calculate average bitrate of first segment
1478 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1482 os->bit_rate = bitrate;
1484 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1485 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1487 os->pos += range_length;
1490 if (c->window_size) {
1491 for (i = 0; i < s->nb_streams; i++) {
1492 OutputStream *os = &c->streams[i];
1493 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1494 if (remove_count > 0)
1495 dashenc_delete_media_segments(s, os, remove_count);
1500 ret = write_manifest(s, final);
1504 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1506 DASHContext *c = s->priv_data;
1507 AVStream *st = s->streams[pkt->stream_index];
1508 OutputStream *os = &c->streams[pkt->stream_index];
1509 int64_t seg_end_duration, elapsed_duration;
1512 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1516 // Fill in a heuristic guess of the packet duration, if none is available.
1517 // The mp4 muxer will do something similar (for the last packet in a fragment)
1518 // if nothing is set (setting it for the other packets doesn't hurt).
1519 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1520 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1521 // so that we know the exact timestamps of fragments.
1522 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1523 pkt->duration = pkt->dts - os->last_dts;
1524 os->last_dts = pkt->dts;
1526 // If forcing the stream to start at 0, the mp4 muxer will set the start
1527 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1528 if (os->first_pts == AV_NOPTS_VALUE &&
1529 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1530 pkt->pts -= pkt->dts;
1534 if (os->first_pts == AV_NOPTS_VALUE)
1535 os->first_pts = pkt->pts;
1536 os->last_pts = pkt->pts;
1538 if (!c->availability_start_time[0])
1539 format_date_now(c->availability_start_time,
1540 sizeof(c->availability_start_time));
1542 if (!os->availability_time_offset && pkt->duration) {
1543 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1545 os->availability_time_offset = ((double) c->seg_duration -
1546 frame_duration) / AV_TIME_BASE;
1549 if (c->use_template && !c->use_timeline) {
1550 elapsed_duration = pkt->pts - os->first_pts;
1551 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1553 elapsed_duration = pkt->pts - os->start_pts;
1554 seg_end_duration = c->seg_duration;
1557 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1558 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1559 av_compare_ts(elapsed_duration, st->time_base,
1560 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1561 int64_t prev_duration = c->last_duration;
1563 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1566 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1570 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1571 if (c->last_duration < prev_duration*9/10 ||
1572 c->last_duration > prev_duration*11/10) {
1573 av_log(s, AV_LOG_WARNING,
1574 "Segment durations differ too much, enable use_timeline "
1575 "and use_template, or keep a stricter keyframe interval\n");
1579 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1583 if (!os->packets_written) {
1584 // If we wrote a previous segment, adjust the start time of the segment
1585 // to the end of the previous one (which is the same as the mp4 muxer
1586 // does). This avoids gaps in the timeline.
1587 if (os->max_pts != AV_NOPTS_VALUE)
1588 os->start_pts = os->max_pts;
1590 os->start_pts = pkt->pts;
1592 if (os->max_pts == AV_NOPTS_VALUE)
1593 os->max_pts = pkt->pts + pkt->duration;
1595 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1596 os->packets_written++;
1597 os->total_pkt_size += pkt->size;
1598 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1601 if (!os->init_range_length)
1602 flush_init_segment(s, os);
1604 //open the output context when the first frame of a segment is ready
1605 if (!c->single_file && os->packets_written == 1) {
1606 AVDictionary *opts = NULL;
1607 const char *proto = avio_find_protocol_name(s->url);
1608 int use_rename = proto && !strcmp(proto, "file");
1609 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1610 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1611 os->media_seg_name, pkt->stream_index,
1612 os->segment_index, os->bit_rate, os->start_pts);
1613 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1615 snprintf(os->temp_path, sizeof(os->temp_path),
1616 use_rename ? "%s.tmp" : "%s", os->full_path);
1617 set_http_options(&opts, c);
1618 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1619 av_dict_free(&opts);
1621 return handle_io_open_error(s, ret, os->temp_path);
1625 //write out the data immediately in streaming mode
1626 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1628 uint8_t *buf = NULL;
1629 if (!os->written_len)
1630 write_styp(os->ctx->pb);
1631 avio_flush(os->ctx->pb);
1632 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1634 avio_write(os->out, buf + os->written_len, len - os->written_len);
1635 avio_flush(os->out);
1637 os->written_len = len;
1643 static int dash_write_trailer(AVFormatContext *s)
1645 DASHContext *c = s->priv_data;
1648 if (s->nb_streams > 0) {
1649 OutputStream *os = &c->streams[0];
1650 // If no segments have been written so far, try to do a crude
1651 // guess of the segment duration
1652 if (!c->last_duration)
1653 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1654 s->streams[0]->time_base,
1656 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1657 s->streams[0]->time_base,
1660 dash_flush(s, 1, -1);
1662 for (i = 0; i < s->nb_streams; ++i) {
1663 OutputStream *os = &c->streams[i];
1664 if (os->ctx && os->ctx_inited) {
1665 av_write_trailer(os->ctx);
1668 if (c->remove_at_exit) {
1669 dashenc_delete_media_segments(s, os, os->nb_segments);
1670 dashenc_delete_segment_file(s, os->initfile);
1674 if (c->remove_at_exit) {
1675 dashenc_delete_file(s, s->url);
1677 if (c->hls_playlist && c->master_playlist_created) {
1678 char filename[1024];
1679 for (i = 0; i < s->nb_streams; ++i) {
1680 OutputStream *os = &c->streams[i];
1681 if (os->segment_type == SEGMENT_TYPE_MP4) {
1682 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
1683 dashenc_delete_file(s, filename);
1686 snprintf(filename, sizeof(filename), "%smaster.m3u8", c->dirname);
1687 dashenc_delete_file(s, filename);
1694 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1696 DASHContext *c = s->priv_data;
1697 OutputStream *os = &c->streams[avpkt->stream_index];
1698 AVFormatContext *oc = os->ctx;
1699 if (oc->oformat->check_bitstream) {
1701 AVPacket pkt = *avpkt;
1702 pkt.stream_index = 0;
1703 ret = oc->oformat->check_bitstream(oc, &pkt);
1705 AVStream *st = s->streams[avpkt->stream_index];
1706 AVStream *ost = oc->streams[0];
1707 st->internal->bsfcs = ost->internal->bsfcs;
1708 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1709 ost->internal->bsfcs = NULL;
1710 ost->internal->nb_bsfcs = 0;
1717 #define OFFSET(x) offsetof(DASHContext, x)
1718 #define E AV_OPT_FLAG_ENCODING_PARAM
1719 static const AVOption options[] = {
1720 { "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 },
1721 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1722 { "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 },
1723 #if FF_API_DASH_MIN_SEG_DURATION
1724 { "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 },
1726 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1727 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1728 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1729 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1730 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1731 { "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 },
1732 { "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 },
1733 { "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 },
1734 { "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 },
1735 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1736 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1737 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1738 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1739 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1740 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1741 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1742 { "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},
1743 { "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"},
1744 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1745 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1746 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1747 { "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 },
1751 static const AVClass dash_class = {
1752 .class_name = "dash muxer",
1753 .item_name = av_default_item_name,
1755 .version = LIBAVUTIL_VERSION_INT,
1758 AVOutputFormat ff_dash_muxer = {
1760 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1761 .extensions = "mpd",
1762 .priv_data_size = sizeof(DASHContext),
1763 .audio_codec = AV_CODEC_ID_AAC,
1764 .video_codec = AV_CODEC_ID_H264,
1765 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1767 .write_header = dash_write_header,
1768 .write_packet = dash_write_packet,
1769 .write_trailer = dash_write_trailer,
1770 .deinit = dash_free,
1771 .check_bitstream = dash_check_bitstream,
1772 .priv_class = &dash_class,