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 *extension_name;
93 const char *single_file_name; /* file names selected for this particular stream */
94 const char *init_seg_name;
95 const char *media_seg_name;
100 char full_path[1024];
101 char temp_path[1024];
102 double availability_time_offset;
107 typedef struct DASHContext {
108 const AVClass *class; /* Class for private options. */
109 char *adaptation_sets;
113 int extra_window_size;
114 #if FF_API_DASH_MIN_SEG_DURATION
115 int min_seg_duration;
117 int64_t seg_duration;
122 OutputStream *streams;
124 int64_t last_duration;
125 int64_t total_duration;
126 char availability_start_time[100];
129 const char *single_file_name; /* file names as specified in options */
130 const char *init_seg_name;
131 const char *media_seg_name;
132 const char *utc_timing_url;
134 const char *user_agent;
137 int master_playlist_created;
138 AVIOContext *mpd_out;
139 AVIOContext *m3u8_out;
142 int index_correction;
143 char *format_options_str;
145 SegmentType segment_type_option; /* segment type as specified in options */
146 int ignore_io_errors;
148 int master_publish_rate;
149 int nr_of_streams_to_flush;
150 int nr_of_streams_flushed;
153 static struct codec_string {
157 { AV_CODEC_ID_VP8, "vp8" },
158 { AV_CODEC_ID_VP9, "vp9" },
159 { AV_CODEC_ID_VORBIS, "vorbis" },
160 { AV_CODEC_ID_OPUS, "opus" },
161 { AV_CODEC_ID_FLAC, "flac" },
165 static struct format_string {
166 SegmentType segment_type;
169 { SEGMENT_TYPE_AUTO, "auto" },
170 { SEGMENT_TYPE_MP4, "mp4" },
171 { SEGMENT_TYPE_WEBM, "webm" },
175 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
176 AVDictionary **options) {
177 DASHContext *c = s->priv_data;
178 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
179 int err = AVERROR_MUXER_NOT_FOUND;
180 if (!*pb || !http_base_proto || !c->http_persistent) {
181 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
182 #if CONFIG_HTTP_PROTOCOL
184 URLContext *http_url_context = ffio_geturlcontext(*pb);
185 av_assert0(http_url_context);
186 err = ff_http_do_new_request(http_url_context, filename);
188 ff_format_io_close(s, pb);
194 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
195 DASHContext *c = s->priv_data;
196 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
201 if (!http_base_proto || !c->http_persistent) {
202 ff_format_io_close(s, pb);
203 #if CONFIG_HTTP_PROTOCOL
205 URLContext *http_url_context = ffio_geturlcontext(*pb);
206 av_assert0(http_url_context);
208 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
213 static const char *get_format_str(SegmentType segment_type) {
215 for (i = 0; i < SEGMENT_TYPE_NB; i++)
216 if (formats[i].segment_type == segment_type)
217 return formats[i].str;
221 static const char *get_extension_str(SegmentType type, int single_file)
225 case SEGMENT_TYPE_MP4: return single_file ? "mp4" : "m4s";
226 case SEGMENT_TYPE_WEBM: return "webm";
227 default: return NULL;
231 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
232 DASHContext *c = s->priv_data;
233 char errbuf[AV_ERROR_MAX_STRING_SIZE];
234 av_strerror(err, errbuf, sizeof(errbuf));
235 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
236 "Unable to open %s for writing: %s\n", url, errbuf);
237 return c->ignore_io_errors ? 0 : err;
240 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
242 if (segment_type == SEGMENT_TYPE_AUTO) {
243 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
244 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
245 segment_type = SEGMENT_TYPE_WEBM;
247 segment_type = SEGMENT_TYPE_MP4;
254 static int init_segment_types(AVFormatContext *s)
256 DASHContext *c = s->priv_data;
257 int has_mp4_streams = 0;
258 for (int i = 0; i < s->nb_streams; ++i) {
259 OutputStream *os = &c->streams[i];
260 SegmentType segment_type = select_segment_type(
261 c->segment_type_option, s->streams[i]->codecpar->codec_id);
262 os->segment_type = segment_type;
263 os->format_name = get_format_str(segment_type);
264 if (!os->format_name) {
265 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
266 return AVERROR_MUXER_NOT_FOUND;
268 os->extension_name = get_extension_str(segment_type, c->single_file);
269 if (!os->extension_name) {
270 av_log(s, AV_LOG_ERROR, "Could not get extension type for stream %d\n", i);
271 return AVERROR_MUXER_NOT_FOUND;
274 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
277 if (c->hls_playlist && !has_mp4_streams) {
278 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
285 static int check_file_extension(const char *filename, const char *extension) {
287 if (!filename || !extension)
289 dot = strrchr(filename, '.');
290 if (dot && !strcmp(dot + 1, extension))
295 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
296 AVRational *frame_rate, char *str, int size) {
298 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
300 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
301 vpcc.profile, vpcc.level, vpcc.bitdepth);
303 // Default to just vp9 in case of error while finding out profile or level
304 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
305 av_strlcpy(str, "vp9", size);
310 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
311 AVRational *frame_rate, char *str, int size)
313 const AVCodecTag *tags[2] = { NULL, NULL };
317 // common Webm codecs are not part of RFC 6381
318 for (i = 0; codecs[i].id; i++)
319 if (codecs[i].id == par->codec_id) {
320 if (codecs[i].id == AV_CODEC_ID_VP9) {
321 set_vp9_codec_str(s, par, frame_rate, str, size);
323 av_strlcpy(str, codecs[i].str, size);
328 // for codecs part of RFC 6381
329 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
330 tags[0] = ff_codec_movvideo_tags;
331 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
332 tags[0] = ff_codec_movaudio_tags;
336 tag = par->codec_tag;
338 tag = av_codec_get_tag(tags, par->codec_id);
346 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
348 tags[0] = ff_mp4_obj_type;
349 oti = av_codec_get_tag(tags, par->codec_id);
351 av_strlcatf(str, size, ".%02"PRIx32, oti);
355 if (tag == MKTAG('m', 'p', '4', 'a')) {
356 if (par->extradata_size >= 2) {
357 int aot = par->extradata[0] >> 3;
359 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
360 av_strlcatf(str, size, ".%d", aot);
362 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
363 // Unimplemented, should output ProfileLevelIndication as a decimal number
364 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
366 } else if (!strcmp(str, "avc1")) {
367 uint8_t *tmpbuf = NULL;
368 uint8_t *extradata = par->extradata;
369 int extradata_size = par->extradata_size;
372 if (extradata[0] != 1) {
374 if (avio_open_dyn_buf(&pb) < 0)
376 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
377 ffio_free_dyn_buf(&pb);
380 extradata_size = avio_close_dyn_buf(pb, &extradata);
384 if (extradata_size >= 4)
385 av_strlcatf(str, size, ".%02x%02x%02x",
386 extradata[1], extradata[2], extradata[3]);
391 static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
396 return AVERROR(EINVAL);
400 av_write_frame(os->ctx, NULL);
401 avio_flush(os->ctx->pb);
403 if (!c->single_file) {
405 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
408 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
413 return avio_open_dyn_buf(&os->ctx->pb);
415 *range_length = avio_tell(os->ctx->pb) - os->pos;
420 static void set_http_options(AVDictionary **options, DASHContext *c)
423 av_dict_set(options, "method", c->method, 0);
425 av_dict_set(options, "user_agent", c->user_agent, 0);
426 if (c->http_persistent)
427 av_dict_set_int(options, "multiple_requests", 1, 0);
429 av_dict_set_int(options, "timeout", c->timeout, 0);
432 static void get_hls_playlist_name(char *playlist_name, int string_size,
433 const char *base_url, int id) {
435 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
437 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
440 static void get_start_index_number(OutputStream *os, DASHContext *c,
441 int *start_index, int *start_number) {
444 if (c->window_size) {
445 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
446 *start_number = FFMAX(os->segment_index - c->window_size, 1);
450 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
451 int representation_id, int final,
452 char *prefetch_url) {
453 DASHContext *c = s->priv_data;
454 int timescale = os->ctx->streams[0]->time_base.den;
455 char temp_filename_hls[1024];
456 char filename_hls[1024];
457 AVDictionary *http_opts = NULL;
458 int target_duration = 0;
460 const char *proto = avio_find_protocol_name(c->dirname);
461 int use_rename = proto && !strcmp(proto, "file");
462 int i, start_index, start_number;
463 double prog_date_time = 0;
465 get_start_index_number(os, c, &start_index, &start_number);
467 if (!c->hls_playlist || start_index >= os->nb_segments ||
468 os->segment_type != SEGMENT_TYPE_MP4)
471 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
472 c->dirname, representation_id);
474 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
476 set_http_options(&http_opts, c);
477 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
478 av_dict_free(&http_opts);
480 handle_io_open_error(s, ret, temp_filename_hls);
483 for (i = start_index; i < os->nb_segments; i++) {
484 Segment *seg = os->segments[i];
485 double duration = (double) seg->duration / timescale;
486 if (target_duration <= duration)
487 target_duration = lrint(duration);
490 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
491 start_number, PLAYLIST_TYPE_NONE, 0);
493 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
494 os->init_range_length, os->init_start_pos);
496 for (i = start_index; i < os->nb_segments; i++) {
497 Segment *seg = os->segments[i];
499 if (prog_date_time == 0) {
500 if (os->nb_segments == 1)
501 prog_date_time = c->start_time_s;
503 prog_date_time = seg->prog_date_time;
505 seg->prog_date_time = prog_date_time;
507 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
508 (double) seg->duration / timescale, 0,
509 seg->range_length, seg->start_pos, NULL,
510 c->single_file ? os->initfile : seg->file,
511 &prog_date_time, 0, 0, 0);
513 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
518 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
521 ff_hls_write_end_list(c->m3u8_out);
523 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
526 if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
527 av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls);
531 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
533 DASHContext *c = s->priv_data;
534 int ret, range_length;
536 ret = flush_dynbuf(c, os, &range_length);
540 os->pos = os->init_range_length = range_length;
541 if (!c->single_file) {
543 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
544 dashenc_io_close(s, &os->out, filename);
549 static void dash_free(AVFormatContext *s)
551 DASHContext *c = s->priv_data;
555 for (i = 0; i < c->nb_as; i++)
556 av_dict_free(&c->as[i].metadata);
563 for (i = 0; i < s->nb_streams; i++) {
564 OutputStream *os = &c->streams[i];
565 if (os->ctx && os->ctx->pb) {
567 ffio_free_dyn_buf(&os->ctx->pb);
569 avio_close(os->ctx->pb);
571 ff_format_io_close(s, &os->out);
573 avformat_free_context(os->ctx);
574 for (j = 0; j < os->nb_segments; j++)
575 av_free(os->segments[j]);
576 av_free(os->segments);
577 av_freep(&os->single_file_name);
578 av_freep(&os->init_seg_name);
579 av_freep(&os->media_seg_name);
581 av_freep(&c->streams);
583 ff_format_io_close(s, &c->mpd_out);
584 ff_format_io_close(s, &c->m3u8_out);
587 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
588 int representation_id, int final)
590 DASHContext *c = s->priv_data;
591 int i, start_index, start_number;
592 get_start_index_number(os, c, &start_index, &start_number);
594 if (c->use_template) {
595 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
596 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
597 if (!c->use_timeline) {
598 avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration);
599 if (c->streaming && os->availability_time_offset)
600 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
601 os->availability_time_offset);
603 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
604 if (c->use_timeline) {
605 int64_t cur_time = 0;
606 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
607 for (i = start_index; i < os->nb_segments; ) {
608 Segment *seg = os->segments[i];
610 avio_printf(out, "\t\t\t\t\t\t<S ");
611 if (i == start_index || seg->time != cur_time) {
612 cur_time = seg->time;
613 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
615 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
616 while (i + repeat + 1 < os->nb_segments &&
617 os->segments[i + repeat + 1]->duration == seg->duration &&
618 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
621 avio_printf(out, "r=\"%d\" ", repeat);
622 avio_printf(out, "/>\n");
624 cur_time += (1 + repeat) * seg->duration;
626 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
628 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
629 } else if (c->single_file) {
630 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
631 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
632 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);
633 for (i = start_index; i < os->nb_segments; i++) {
634 Segment *seg = os->segments[i];
635 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
636 if (seg->index_length)
637 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
638 avio_printf(out, "/>\n");
640 avio_printf(out, "\t\t\t\t</SegmentList>\n");
642 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
643 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
644 for (i = start_index; i < os->nb_segments; i++) {
645 Segment *seg = os->segments[i];
646 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
648 avio_printf(out, "\t\t\t\t</SegmentList>\n");
650 if (!c->lhls || final) {
651 write_hls_media_playlist(os, s, representation_id, final, NULL);
656 static char *xmlescape(const char *str) {
657 int outlen = strlen(str)*3/2 + 6;
658 char *out = av_realloc(NULL, outlen + 1);
662 for (; *str; str++) {
663 if (pos + 6 > outlen) {
665 outlen = 2 * outlen + 6;
666 tmp = av_realloc(out, outlen + 1);
674 memcpy(&out[pos], "&", 5);
676 } else if (*str == '<') {
677 memcpy(&out[pos], "<", 4);
679 } else if (*str == '>') {
680 memcpy(&out[pos], ">", 4);
682 } else if (*str == '\'') {
683 memcpy(&out[pos], "'", 6);
685 } else if (*str == '\"') {
686 memcpy(&out[pos], """, 6);
696 static void write_time(AVIOContext *out, int64_t time)
698 int seconds = time / AV_TIME_BASE;
699 int fractions = time % AV_TIME_BASE;
700 int minutes = seconds / 60;
701 int hours = minutes / 60;
704 avio_printf(out, "PT");
706 avio_printf(out, "%dH", hours);
707 if (hours || minutes)
708 avio_printf(out, "%dM", minutes);
709 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
712 static void format_date_now(char *buf, int size)
714 struct tm *ptm, tmbuf;
715 int64_t time_us = av_gettime();
716 int64_t time_ms = time_us / 1000;
717 const time_t time_s = time_ms / 1000;
718 int millisec = time_ms - (time_s * 1000);
719 ptm = gmtime_r(&time_s, &tmbuf);
722 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
727 snprintf(buf + len, size - len, ".%03dZ", millisec);
731 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
734 DASHContext *c = s->priv_data;
735 AdaptationSet *as = &c->as[as_index];
736 AVDictionaryEntry *lang, *role;
739 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
740 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
741 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)
742 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
743 lang = av_dict_get(as->metadata, "language", NULL, 0);
745 avio_printf(out, " lang=\"%s\"", lang->value);
746 avio_printf(out, ">\n");
748 role = av_dict_get(as->metadata, "role", NULL, 0);
750 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
752 for (i = 0; i < s->nb_streams; i++) {
753 OutputStream *os = &c->streams[i];
754 char bandwidth_str[64] = {'\0'};
756 if (os->as_idx - 1 != as_index)
759 if (os->bit_rate > 0)
760 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
763 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
764 AVStream *st = s->streams[i];
765 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
766 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
767 if (st->avg_frame_rate.num)
768 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
769 avio_printf(out, ">\n");
771 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
772 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
773 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
774 s->streams[i]->codecpar->channels);
776 output_segment_list(os, out, s, i, final);
777 avio_printf(out, "\t\t\t</Representation>\n");
779 avio_printf(out, "\t\t</AdaptationSet>\n");
784 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
786 DASHContext *c = s->priv_data;
788 void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
790 return AVERROR(ENOMEM);
794 *as = &c->as[c->nb_as - 1];
795 memset(*as, 0, sizeof(**as));
796 (*as)->media_type = type;
801 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
803 DASHContext *c = s->priv_data;
804 AdaptationSet *as = &c->as[as_idx - 1];
805 OutputStream *os = &c->streams[i];
807 if (as->media_type != s->streams[i]->codecpar->codec_type) {
808 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
809 return AVERROR(EINVAL);
810 } else if (os->as_idx) {
811 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
812 return AVERROR(EINVAL);
819 static int parse_adaptation_sets(AVFormatContext *s)
821 DASHContext *c = s->priv_data;
822 const char *p = c->adaptation_sets;
823 enum { new_set, parse_id, parsing_streams } state;
827 // default: one AdaptationSet for each stream
829 for (i = 0; i < s->nb_streams; i++) {
830 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
832 snprintf(as->id, sizeof(as->id), "%d", i);
834 c->streams[i].as_idx = c->nb_as;
839 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
845 } else if (state == new_set && av_strstart(p, "id=", &p)) {
847 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
851 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
857 } else if (state == parse_id && av_strstart(p, "streams=", &p)) {
858 state = parsing_streams;
859 } else if (state == parsing_streams) {
860 AdaptationSet *as = &c->as[c->nb_as - 1];
861 char idx_str[8], *end_str;
863 n = strcspn(p, " ,");
864 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
867 // if value is "a" or "v", map all streams of that type
868 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
869 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
870 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
872 for (i = 0; i < s->nb_streams; i++) {
873 if (s->streams[i]->codecpar->codec_type != type)
876 as->media_type = s->streams[i]->codecpar->codec_type;
878 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
881 } else { // select single stream
882 i = strtol(idx_str, &end_str, 10);
883 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
884 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
885 return AVERROR(EINVAL);
887 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
889 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
890 as->media_type = s->streams[i]->codecpar->codec_type;
893 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
902 return AVERROR(EINVAL);
907 // check for unassigned streams
908 for (i = 0; i < s->nb_streams; i++) {
909 OutputStream *os = &c->streams[i];
911 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
912 return AVERROR(EINVAL);
918 static int write_manifest(AVFormatContext *s, int final)
920 DASHContext *c = s->priv_data;
922 char temp_filename[1024];
924 const char *proto = avio_find_protocol_name(s->url);
925 int use_rename = proto && !strcmp(proto, "file");
926 static unsigned int warned_non_file = 0;
927 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
928 AVDictionary *opts = NULL;
930 if (!use_rename && !warned_non_file++)
931 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
933 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
934 set_http_options(&opts, c);
935 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
938 return handle_io_open_error(s, ret, temp_filename);
941 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
942 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
943 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
944 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
945 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
946 "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
947 "\ttype=\"%s\"\n", final ? "static" : "dynamic");
949 avio_printf(out, "\tmediaPresentationDuration=\"");
950 write_time(out, c->total_duration);
951 avio_printf(out, "\"\n");
953 int64_t update_period = c->last_duration / AV_TIME_BASE;
955 if (c->use_template && !c->use_timeline)
957 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
958 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
959 if (c->availability_start_time[0])
960 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
961 format_date_now(now_str, sizeof(now_str));
963 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
964 if (c->window_size && c->use_template) {
965 avio_printf(out, "\ttimeShiftBufferDepth=\"");
966 write_time(out, c->last_duration * c->window_size);
967 avio_printf(out, "\"\n");
970 avio_printf(out, "\tminBufferTime=\"");
971 write_time(out, c->last_duration * 2);
972 avio_printf(out, "\">\n");
973 avio_printf(out, "\t<ProgramInformation>\n");
975 char *escaped = xmlescape(title->value);
976 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
979 avio_printf(out, "\t</ProgramInformation>\n");
981 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
982 OutputStream *os = &c->streams[0];
983 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
984 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
985 avio_printf(out, "\t<Period id=\"0\" start=\"");
986 write_time(out, start_time);
987 avio_printf(out, "\">\n");
989 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
992 for (i = 0; i < c->nb_as; i++) {
993 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
996 avio_printf(out, "\t</Period>\n");
998 if (c->utc_timing_url)
999 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
1001 avio_printf(out, "</MPD>\n");
1003 dashenc_io_close(s, &c->mpd_out, temp_filename);
1006 if ((ret = avpriv_io_move(temp_filename, s->url)) < 0)
1010 if (c->hls_playlist) {
1011 char filename_hls[1024];
1012 const char *audio_group = "A1";
1013 char audio_codec_str[128] = "\0";
1015 int max_audio_bitrate = 0;
1017 // Publish master playlist only the configured rate
1018 if (c->master_playlist_created && (!c->master_publish_rate ||
1019 c->streams[0].segment_index % c->master_publish_rate))
1023 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
1025 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
1027 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1029 set_http_options(&opts, c);
1030 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1031 av_dict_free(&opts);
1033 return handle_io_open_error(s, ret, temp_filename);
1036 ff_hls_write_playlist_version(c->m3u8_out, 7);
1038 for (i = 0; i < s->nb_streams; i++) {
1039 char playlist_file[64];
1040 AVStream *st = s->streams[i];
1041 OutputStream *os = &c->streams[i];
1042 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1044 if (os->segment_type != SEGMENT_TYPE_MP4)
1046 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1047 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1048 playlist_file, NULL, i, is_default);
1049 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1050 os->muxer_overhead, max_audio_bitrate);
1051 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1052 if (strlen(audio_codec_str))
1053 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1054 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1059 for (i = 0; i < s->nb_streams; i++) {
1060 char playlist_file[64];
1061 char codec_str[128];
1062 AVStream *st = s->streams[i];
1063 OutputStream *os = &c->streams[i];
1064 char *agroup = NULL;
1065 char *codec_str_ptr = NULL;
1066 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
1067 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1069 if (os->segment_type != SEGMENT_TYPE_MP4)
1071 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1072 if (max_audio_bitrate) {
1073 agroup = (char *)audio_group;
1074 stream_bitrate += max_audio_bitrate;
1075 av_strlcat(codec_str, ",", sizeof(codec_str));
1076 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1078 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1079 codec_str_ptr = codec_str;
1081 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1082 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1083 playlist_file, agroup,
1084 codec_str_ptr, NULL);
1086 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1088 if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0)
1090 c->master_playlist_created = 1;
1096 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1098 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1100 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1104 static int dash_init(AVFormatContext *s)
1106 DASHContext *c = s->priv_data;
1109 char basename[1024];
1111 c->nr_of_streams_to_flush = 0;
1112 if (c->single_file_name)
1115 c->use_template = 0;
1117 #if FF_API_DASH_MIN_SEG_DURATION
1118 if (c->min_seg_duration != 5000000) {
1119 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1120 c->seg_duration = c->min_seg_duration;
1123 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1124 av_log(s, AV_LOG_ERROR,
1125 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1126 return AVERROR_EXPERIMENTAL;
1129 if (c->lhls && !c->streaming) {
1130 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1134 if (c->lhls && !c->hls_playlist) {
1135 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1139 if (c->global_sidx && !c->single_file) {
1140 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1144 if (c->global_sidx && c->streaming) {
1145 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1149 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1150 ptr = strrchr(c->dirname, '/');
1152 av_strlcpy(basename, &ptr[1], sizeof(basename));
1155 c->dirname[0] = '\0';
1156 av_strlcpy(basename, s->url, sizeof(basename));
1159 ptr = strrchr(basename, '.');
1163 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1165 return AVERROR(ENOMEM);
1167 if ((ret = parse_adaptation_sets(s)) < 0)
1170 if ((ret = init_segment_types(s)) < 0)
1173 for (i = 0; i < s->nb_streams; i++) {
1174 OutputStream *os = &c->streams[i];
1175 AdaptationSet *as = &c->as[os->as_idx - 1];
1176 AVFormatContext *ctx;
1178 AVDictionary *opts = NULL;
1179 char filename[1024];
1181 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1182 if (!os->bit_rate) {
1183 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1184 AV_LOG_ERROR : AV_LOG_WARNING;
1185 av_log(s, level, "No bit rate set for stream %d\n", i);
1186 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1187 return AVERROR(EINVAL);
1190 // copy AdaptationSet language and role from stream metadata
1191 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1192 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1194 ctx = avformat_alloc_context();
1196 return AVERROR(ENOMEM);
1198 if (c->init_seg_name) {
1199 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->extension_name);
1200 if (!os->init_seg_name)
1201 return AVERROR(ENOMEM);
1203 if (c->media_seg_name) {
1204 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->extension_name);
1205 if (!os->media_seg_name)
1206 return AVERROR(ENOMEM);
1208 if (c->single_file_name) {
1209 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->extension_name);
1210 if (!os->single_file_name)
1211 return AVERROR(ENOMEM);
1214 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1215 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1216 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1217 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1218 av_log(s, AV_LOG_WARNING,
1219 "One or many segment file names doesn't end with .webm. "
1220 "Override -init_seg_name and/or -media_seg_name and/or "
1221 "-single_file_name to end with the extension .webm\n");
1224 // Streaming not supported as matroskaenc buffers internally before writing the output
1225 av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1230 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1232 return AVERROR_MUXER_NOT_FOUND;
1234 ctx->interrupt_callback = s->interrupt_callback;
1235 ctx->opaque = s->opaque;
1236 ctx->io_close = s->io_close;
1237 ctx->io_open = s->io_open;
1238 ctx->strict_std_compliance = s->strict_std_compliance;
1240 if (!(st = avformat_new_stream(ctx, NULL)))
1241 return AVERROR(ENOMEM);
1242 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1243 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1244 st->time_base = s->streams[i]->time_base;
1245 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1246 ctx->avoid_negative_ts = s->avoid_negative_ts;
1247 ctx->flags = s->flags;
1249 if (c->single_file) {
1250 if (os->single_file_name)
1251 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1253 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1255 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1257 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1258 set_http_options(&opts, c);
1259 if (!c->single_file) {
1260 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1262 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1264 ctx->url = av_strdup(filename);
1265 ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1267 av_dict_free(&opts);
1270 os->init_start_pos = 0;
1272 if (c->format_options_str) {
1273 ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0);
1278 if (os->segment_type == SEGMENT_TYPE_MP4) {
1280 // frag_every_frame : Allows lower latency streaming
1281 // skip_sidx : Reduce bitrate overhead
1282 // skip_trailer : Avoids growing memory usage with time
1283 av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+skip_sidx+skip_trailer", 0);
1286 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov+global_sidx+skip_trailer", 0);
1288 av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov+skip_trailer", 0);
1291 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1292 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1293 av_dict_set_int(&opts, "dash", 1, 0);
1294 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1295 av_dict_set_int(&opts, "live", 1, 0);
1297 ret = avformat_init_output(ctx, &opts);
1298 av_dict_free(&opts);
1302 avio_flush(ctx->pb);
1304 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1306 s->streams[i]->time_base = st->time_base;
1307 // If the muxer wants to shift timestamps, request to have them shifted
1308 // already before being handed to this muxer, so we don't have mismatches
1309 // between the MPD and the actual segments.
1310 s->avoid_negative_ts = ctx->avoid_negative_ts;
1311 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1312 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1313 if (avg_frame_rate.num > 0) {
1314 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1315 as->min_frame_rate = avg_frame_rate;
1316 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1317 as->max_frame_rate = avg_frame_rate;
1319 as->ambiguous_frame_rate = 1;
1324 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1325 sizeof(os->codec_str));
1326 os->first_pts = AV_NOPTS_VALUE;
1327 os->max_pts = AV_NOPTS_VALUE;
1328 os->last_dts = AV_NOPTS_VALUE;
1329 os->segment_index = 1;
1331 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1332 c->nr_of_streams_to_flush++;
1335 if (!c->has_video && c->seg_duration <= 0) {
1336 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1337 return AVERROR(EINVAL);
1340 c->nr_of_streams_flushed = 0;
1345 static int dash_write_header(AVFormatContext *s)
1347 DASHContext *c = s->priv_data;
1349 for (i = 0; i < s->nb_streams; i++) {
1350 OutputStream *os = &c->streams[i];
1351 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1354 // Flush init segment
1355 // Only for WebM segment, since for mp4 delay_moov is set and
1356 // the init segment is thus flushed after the first packets.
1357 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1358 (ret = flush_init_segment(s, os)) < 0)
1364 static int add_segment(OutputStream *os, const char *file,
1365 int64_t time, int64_t duration,
1366 int64_t start_pos, int64_t range_length,
1367 int64_t index_length, int next_exp_index)
1371 if (os->nb_segments >= os->segments_size) {
1372 os->segments_size = (os->segments_size + 1) * 2;
1373 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1374 os->segments_size)) < 0) {
1375 os->segments_size = 0;
1376 os->nb_segments = 0;
1380 seg = av_mallocz(sizeof(*seg));
1382 return AVERROR(ENOMEM);
1383 av_strlcpy(seg->file, file, sizeof(seg->file));
1385 seg->duration = duration;
1386 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1387 seg->duration += seg->time;
1390 seg->start_pos = start_pos;
1391 seg->range_length = range_length;
1392 seg->index_length = index_length;
1393 os->segments[os->nb_segments++] = seg;
1394 os->segment_index++;
1395 //correcting the segment index if it has fallen behind the expected value
1396 if (os->segment_index < next_exp_index) {
1397 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1398 file, os->segment_index, next_exp_index);
1399 os->segment_index = next_exp_index;
1404 static void write_styp(AVIOContext *pb)
1407 ffio_wfourcc(pb, "styp");
1408 ffio_wfourcc(pb, "msdh");
1409 avio_wb32(pb, 0); /* minor */
1410 ffio_wfourcc(pb, "msdh");
1411 ffio_wfourcc(pb, "msix");
1414 static void find_index_range(AVFormatContext *s, const char *full_path,
1415 int64_t pos, int *index_length)
1421 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1424 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1425 ff_format_io_close(s, &pb);
1428 ret = avio_read(pb, buf, 8);
1429 ff_format_io_close(s, &pb);
1432 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1434 *index_length = AV_RB32(&buf[0]);
1437 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1438 AVCodecParameters *par,
1439 AVRational *frame_rate)
1443 if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
1446 extradata = av_malloc(par->extradata_size);
1449 return AVERROR(ENOMEM);
1451 memcpy(extradata, par->extradata, par->extradata_size);
1453 os->ctx->streams[0]->codecpar->extradata = extradata;
1454 os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size;
1456 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1461 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1462 DASHContext *c = s->priv_data;
1463 int http_base_proto = ff_is_http_proto(filename);
1465 if (http_base_proto) {
1466 AVIOContext *out = NULL;
1467 AVDictionary *http_opts = NULL;
1469 set_http_options(&http_opts, c);
1470 av_dict_set(&http_opts, "method", "DELETE", 0);
1472 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1473 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1476 av_dict_free(&http_opts);
1477 ff_format_io_close(s, &out);
1479 int res = avpriv_io_delete(filename);
1481 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1482 av_strerror(res, errbuf, sizeof(errbuf));
1483 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1488 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1490 DASHContext *c = s->priv_data;
1491 size_t dirname_len, file_len;
1492 char filename[1024];
1494 dirname_len = strlen(c->dirname);
1495 if (dirname_len >= sizeof(filename)) {
1496 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the directory path is too long: %"PRIu64" characters: %s\n",
1497 (uint64_t)dirname_len, c->dirname);
1498 return AVERROR(ENAMETOOLONG);
1501 memcpy(filename, c->dirname, dirname_len);
1503 file_len = strlen(file);
1504 if ((dirname_len + file_len) >= sizeof(filename)) {
1505 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the path is too long: %"PRIu64" characters: %s%s\n",
1506 (uint64_t)(dirname_len + file_len), c->dirname, file);
1507 return AVERROR(ENAMETOOLONG);
1510 memcpy(filename + dirname_len, file, file_len + 1); // include the terminating zero
1511 dashenc_delete_file(s, filename);
1516 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1518 for (int i = 0; i < remove_count; ++i) {
1519 dashenc_delete_segment_file(s, os->segments[i]->file);
1521 // Delete the segment regardless of whether the file was successfully deleted
1522 av_free(os->segments[i]);
1525 os->nb_segments -= remove_count;
1526 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1529 static int dash_flush(AVFormatContext *s, int final, int stream)
1531 DASHContext *c = s->priv_data;
1534 const char *proto = avio_find_protocol_name(s->url);
1535 int use_rename = proto && !strcmp(proto, "file");
1537 int cur_flush_segment_index = 0, next_exp_index = -1;
1539 cur_flush_segment_index = c->streams[stream].segment_index;
1541 //finding the next segment's expected index, based on the current pts value
1542 if (c->use_template && !c->use_timeline && c->index_correction &&
1543 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1544 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1545 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1546 c->streams[stream].first_pts,
1547 s->streams[stream]->time_base,
1549 next_exp_index = (pts_diff / c->seg_duration) + 1;
1553 for (i = 0; i < s->nb_streams; i++) {
1554 OutputStream *os = &c->streams[i];
1555 AVStream *st = s->streams[i];
1556 int range_length, index_length = 0;
1558 if (!os->packets_written)
1561 // Flush the single stream that got a keyframe right now.
1562 // Flush all audio streams as well, in sync with video keyframes,
1563 // but not the other video streams.
1564 if (stream >= 0 && i != stream) {
1565 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1567 // Make sure we don't flush audio streams multiple times, when
1568 // all video streams are flushed one at a time.
1569 if (c->has_video && os->segment_index > cur_flush_segment_index)
1573 if (!c->single_file) {
1574 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1575 write_styp(os->ctx->pb);
1577 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1580 ret = flush_dynbuf(c, os, &range_length);
1583 os->packets_written = 0;
1585 if (c->single_file) {
1586 find_index_range(s, os->full_path, os->pos, &index_length);
1588 dashenc_io_close(s, &os->out, os->temp_path);
1591 ret = avpriv_io_move(os->temp_path, os->full_path);
1597 if (!os->muxer_overhead)
1598 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1600 av_rescale_q(os->max_pts - os->start_pts,
1601 st->time_base, AV_TIME_BASE_Q);
1602 os->total_pkt_size = 0;
1604 if (!os->bit_rate) {
1605 // calculate average bitrate of first segment
1606 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1610 os->bit_rate = bitrate;
1612 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1613 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1615 os->pos += range_length;
1618 if (c->window_size) {
1619 for (i = 0; i < s->nb_streams; i++) {
1620 OutputStream *os = &c->streams[i];
1621 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1622 if (remove_count > 0)
1623 dashenc_delete_media_segments(s, os, remove_count);
1628 for (i = 0; i < s->nb_streams; i++) {
1629 OutputStream *os = &c->streams[i];
1630 if (os->ctx && os->ctx_inited) {
1631 int64_t file_size = avio_tell(os->ctx->pb);
1632 av_write_trailer(os->ctx);
1633 if (c->global_sidx) {
1634 int j, start_index, start_number;
1635 int64_t sidx_size = avio_tell(os->ctx->pb) - file_size;
1636 get_start_index_number(os, c, &start_index, &start_number);
1637 if (start_index >= os->nb_segments ||
1638 os->segment_type != SEGMENT_TYPE_MP4)
1640 os->init_range_length += sidx_size;
1641 for (j = start_index; j < os->nb_segments; j++) {
1642 Segment *seg = os->segments[j];
1643 seg->start_pos += sidx_size;
1651 if (c->has_video && !final) {
1652 c->nr_of_streams_flushed++;
1653 if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
1656 c->nr_of_streams_flushed = 0;
1658 ret = write_manifest(s, final);
1663 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1665 DASHContext *c = s->priv_data;
1666 AVStream *st = s->streams[pkt->stream_index];
1667 OutputStream *os = &c->streams[pkt->stream_index];
1668 int64_t seg_end_duration, elapsed_duration;
1671 ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate);
1675 // Fill in a heuristic guess of the packet duration, if none is available.
1676 // The mp4 muxer will do something similar (for the last packet in a fragment)
1677 // if nothing is set (setting it for the other packets doesn't hurt).
1678 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1679 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1680 // so that we know the exact timestamps of fragments.
1681 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1682 pkt->duration = pkt->dts - os->last_dts;
1683 os->last_dts = pkt->dts;
1685 // If forcing the stream to start at 0, the mp4 muxer will set the start
1686 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1687 if (os->first_pts == AV_NOPTS_VALUE &&
1688 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1689 pkt->pts -= pkt->dts;
1693 if (os->first_pts == AV_NOPTS_VALUE)
1694 os->first_pts = pkt->pts;
1695 os->last_pts = pkt->pts;
1697 if (!c->availability_start_time[0]) {
1698 int64_t start_time_us = av_gettime();
1699 c->start_time_s = start_time_us / 1000000;
1700 format_date_now(c->availability_start_time,
1701 sizeof(c->availability_start_time));
1704 if (!os->availability_time_offset && pkt->duration) {
1705 int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base,
1707 os->availability_time_offset = ((double) c->seg_duration -
1708 frame_duration) / AV_TIME_BASE;
1711 if (c->use_template && !c->use_timeline) {
1712 elapsed_duration = pkt->pts - os->first_pts;
1713 seg_end_duration = (int64_t) os->segment_index * c->seg_duration;
1715 elapsed_duration = pkt->pts - os->start_pts;
1716 seg_end_duration = c->seg_duration;
1719 if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1720 pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
1721 av_compare_ts(elapsed_duration, st->time_base,
1722 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
1723 int64_t prev_duration = c->last_duration;
1725 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
1728 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
1732 if ((!c->use_timeline || !c->use_template) && prev_duration) {
1733 if (c->last_duration < prev_duration*9/10 ||
1734 c->last_duration > prev_duration*11/10) {
1735 av_log(s, AV_LOG_WARNING,
1736 "Segment durations differ too much, enable use_timeline "
1737 "and use_template, or keep a stricter keyframe interval\n");
1741 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
1745 if (!os->packets_written) {
1746 // If we wrote a previous segment, adjust the start time of the segment
1747 // to the end of the previous one (which is the same as the mp4 muxer
1748 // does). This avoids gaps in the timeline.
1749 if (os->max_pts != AV_NOPTS_VALUE)
1750 os->start_pts = os->max_pts;
1752 os->start_pts = pkt->pts;
1754 if (os->max_pts == AV_NOPTS_VALUE)
1755 os->max_pts = pkt->pts + pkt->duration;
1757 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
1758 os->packets_written++;
1759 os->total_pkt_size += pkt->size;
1760 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
1763 if (!os->init_range_length)
1764 flush_init_segment(s, os);
1766 //open the output context when the first frame of a segment is ready
1767 if (!c->single_file && os->packets_written == 1) {
1768 AVDictionary *opts = NULL;
1769 const char *proto = avio_find_protocol_name(s->url);
1770 int use_rename = proto && !strcmp(proto, "file");
1771 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
1772 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
1773 os->media_seg_name, pkt->stream_index,
1774 os->segment_index, os->bit_rate, os->start_pts);
1775 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
1777 snprintf(os->temp_path, sizeof(os->temp_path),
1778 use_rename ? "%s.tmp" : "%s", os->full_path);
1779 set_http_options(&opts, c);
1780 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
1781 av_dict_free(&opts);
1783 return handle_io_open_error(s, ret, os->temp_path);
1786 char *prefetch_url = use_rename ? NULL : os->filename;
1787 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
1791 //write out the data immediately in streaming mode
1792 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
1794 uint8_t *buf = NULL;
1795 if (!os->written_len)
1796 write_styp(os->ctx->pb);
1797 avio_flush(os->ctx->pb);
1798 len = avio_get_dyn_buf (os->ctx->pb, &buf);
1800 avio_write(os->out, buf + os->written_len, len - os->written_len);
1801 avio_flush(os->out);
1803 os->written_len = len;
1809 static int dash_write_trailer(AVFormatContext *s)
1811 DASHContext *c = s->priv_data;
1814 if (s->nb_streams > 0) {
1815 OutputStream *os = &c->streams[0];
1816 // If no segments have been written so far, try to do a crude
1817 // guess of the segment duration
1818 if (!c->last_duration)
1819 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
1820 s->streams[0]->time_base,
1822 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
1823 s->streams[0]->time_base,
1826 dash_flush(s, 1, -1);
1828 if (c->remove_at_exit) {
1829 for (i = 0; i < s->nb_streams; ++i) {
1830 OutputStream *os = &c->streams[i];
1831 dashenc_delete_media_segments(s, os, os->nb_segments);
1832 dashenc_delete_segment_file(s, os->initfile);
1833 if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
1834 char filename[1024];
1835 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
1836 dashenc_delete_file(s, filename);
1839 dashenc_delete_file(s, s->url);
1841 if (c->hls_playlist && c->master_playlist_created) {
1842 char filename[1024];
1843 snprintf(filename, sizeof(filename), "%smaster.m3u8", c->dirname);
1844 dashenc_delete_file(s, filename);
1851 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1853 DASHContext *c = s->priv_data;
1854 OutputStream *os = &c->streams[avpkt->stream_index];
1855 AVFormatContext *oc = os->ctx;
1856 if (oc->oformat->check_bitstream) {
1858 AVPacket pkt = *avpkt;
1859 pkt.stream_index = 0;
1860 ret = oc->oformat->check_bitstream(oc, &pkt);
1862 AVStream *st = s->streams[avpkt->stream_index];
1863 AVStream *ost = oc->streams[0];
1864 st->internal->bsfcs = ost->internal->bsfcs;
1865 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1866 ost->internal->bsfcs = NULL;
1867 ost->internal->nb_bsfcs = 0;
1874 #define OFFSET(x) offsetof(DASHContext, x)
1875 #define E AV_OPT_FLAG_ENCODING_PARAM
1876 static const AVOption options[] = {
1877 { "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 },
1878 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1879 { "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 },
1880 #if FF_API_DASH_MIN_SEG_DURATION
1881 { "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 },
1883 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
1884 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1885 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1886 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1887 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1888 { "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 },
1889 { "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 },
1890 { "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 },
1891 { "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 },
1892 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
1893 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1894 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1895 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1896 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1897 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
1898 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1899 { "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},
1900 { "global_sidx", "Write global SIDX atom. Applicable only for single file, mp4 output, non-streaming mode", OFFSET(global_sidx), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1901 { "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"},
1902 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
1903 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
1904 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
1905 { "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 },
1906 { "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 },
1907 { "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},
1911 static const AVClass dash_class = {
1912 .class_name = "dash muxer",
1913 .item_name = av_default_item_name,
1915 .version = LIBAVUTIL_VERSION_INT,
1918 AVOutputFormat ff_dash_muxer = {
1920 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1921 .extensions = "mpd",
1922 .priv_data_size = sizeof(DASHContext),
1923 .audio_codec = AV_CODEC_ID_AAC,
1924 .video_codec = AV_CODEC_ID_H264,
1925 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
1927 .write_header = dash_write_header,
1928 .write_packet = dash_write_packet,
1929 .write_trailer = dash_write_trailer,
1930 .deinit = dash_free,
1931 .check_bitstream = dash_check_bitstream,
1932 .priv_class = &dash_class,