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/parseutils.h"
35 #include "libavutil/rational.h"
36 #include "libavutil/time.h"
37 #include "libavutil/time_internal.h"
42 #include "avio_internal.h"
43 #include "hlsplaylist.h"
44 #if CONFIG_HTTP_PROTOCOL
49 #include "os_support.h"
55 SEGMENT_TYPE_AUTO = 0,
63 FRAG_TYPE_EVERY_FRAME,
69 #define MPD_PROFILE_DASH 1
70 #define MPD_PROFILE_DVB 2
72 typedef struct Segment {
75 int range_length, index_length;
77 double prog_date_time;
82 typedef struct AdaptationSet {
86 int64_t frag_duration;
88 enum AVMediaType media_type;
89 AVDictionary *metadata;
90 AVRational min_frame_rate, max_frame_rate;
91 int ambiguous_frame_rate;
92 int64_t max_frag_duration;
93 int max_width, max_height;
98 typedef struct OutputStream {
100 int ctx_inited, as_idx;
102 AVCodecParserContext *parser;
103 AVCodecContext *parser_avctx;
106 int64_t init_start_pos, pos;
107 int init_range_length;
108 int nb_segments, segments_size, segment_index;
109 int64_t seg_duration;
110 int64_t frag_duration;
111 int64_t last_duration;
113 int64_t first_pts, start_pts, max_pts;
114 int64_t last_dts, last_pts;
117 SegmentType segment_type; /* segment type selected for this particular stream */
118 const char *format_name;
119 const char *extension_name;
120 const char *single_file_name; /* file names selected for this particular stream */
121 const char *init_seg_name;
122 const char *media_seg_name;
127 char full_path[1024];
128 char temp_path[1024];
129 double availability_time_offset;
130 int64_t producer_reference_time;
131 char producer_reference_time_str[100];
133 int64_t total_pkt_duration;
140 typedef struct DASHContext {
141 const AVClass *class; /* Class for private options. */
142 char *adaptation_sets;
146 int extra_window_size;
147 #if FF_API_DASH_MIN_SEG_DURATION
148 int min_seg_duration;
150 int64_t seg_duration;
151 int64_t frag_duration;
156 OutputStream *streams;
158 int64_t last_duration;
159 int64_t total_duration;
160 char availability_start_time[100];
162 int64_t presentation_time_offset;
164 const char *single_file_name; /* file names as specified in options */
165 const char *init_seg_name;
166 const char *media_seg_name;
167 const char *utc_timing_url;
169 const char *user_agent;
173 int master_playlist_created;
174 AVIOContext *mpd_out;
175 AVIOContext *m3u8_out;
178 int index_correction;
179 AVDictionary *format_options;
181 SegmentType segment_type_option; /* segment type as specified in options */
182 int ignore_io_errors;
185 int master_publish_rate;
186 int nr_of_streams_to_flush;
187 int nr_of_streams_flushed;
190 int64_t max_gop_size;
192 int64_t target_latency;
193 int target_latency_refid;
196 static struct codec_string {
200 { AV_CODEC_ID_VP8, "vp8" },
201 { AV_CODEC_ID_VP9, "vp9" },
202 { AV_CODEC_ID_VORBIS, "vorbis" },
203 { AV_CODEC_ID_OPUS, "opus" },
204 { AV_CODEC_ID_FLAC, "flac" },
208 static struct format_string {
209 SegmentType segment_type;
212 { SEGMENT_TYPE_AUTO, "auto" },
213 { SEGMENT_TYPE_MP4, "mp4" },
214 { SEGMENT_TYPE_WEBM, "webm" },
218 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
219 AVDictionary **options) {
220 DASHContext *c = s->priv_data;
221 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
222 int err = AVERROR_MUXER_NOT_FOUND;
223 if (!*pb || !http_base_proto || !c->http_persistent) {
224 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
225 #if CONFIG_HTTP_PROTOCOL
227 URLContext *http_url_context = ffio_geturlcontext(*pb);
228 av_assert0(http_url_context);
229 err = ff_http_do_new_request(http_url_context, filename);
231 ff_format_io_close(s, pb);
237 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
238 DASHContext *c = s->priv_data;
239 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
244 if (!http_base_proto || !c->http_persistent) {
245 ff_format_io_close(s, pb);
246 #if CONFIG_HTTP_PROTOCOL
248 URLContext *http_url_context = ffio_geturlcontext(*pb);
249 av_assert0(http_url_context);
251 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
256 static const char *get_format_str(SegmentType segment_type) {
258 for (i = 0; i < SEGMENT_TYPE_NB; i++)
259 if (formats[i].segment_type == segment_type)
260 return formats[i].str;
264 static const char *get_extension_str(SegmentType type, int single_file)
268 case SEGMENT_TYPE_MP4: return single_file ? "mp4" : "m4s";
269 case SEGMENT_TYPE_WEBM: return "webm";
270 default: return NULL;
274 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
275 DASHContext *c = s->priv_data;
276 char errbuf[AV_ERROR_MAX_STRING_SIZE];
277 av_strerror(err, errbuf, sizeof(errbuf));
278 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
279 "Unable to open %s for writing: %s\n", url, errbuf);
280 return c->ignore_io_errors ? 0 : err;
283 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
285 if (segment_type == SEGMENT_TYPE_AUTO) {
286 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
287 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
288 segment_type = SEGMENT_TYPE_WEBM;
290 segment_type = SEGMENT_TYPE_MP4;
297 static int init_segment_types(AVFormatContext *s)
299 DASHContext *c = s->priv_data;
300 int has_mp4_streams = 0;
301 for (int i = 0; i < s->nb_streams; ++i) {
302 OutputStream *os = &c->streams[i];
303 SegmentType segment_type = select_segment_type(
304 c->segment_type_option, s->streams[i]->codecpar->codec_id);
305 os->segment_type = segment_type;
306 os->format_name = get_format_str(segment_type);
307 if (!os->format_name) {
308 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
309 return AVERROR_MUXER_NOT_FOUND;
311 os->extension_name = get_extension_str(segment_type, c->single_file);
312 if (!os->extension_name) {
313 av_log(s, AV_LOG_ERROR, "Could not get extension type for stream %d\n", i);
314 return AVERROR_MUXER_NOT_FOUND;
317 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
320 if (c->hls_playlist && !has_mp4_streams) {
321 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
328 static int check_file_extension(const char *filename, const char *extension) {
330 if (!filename || !extension)
332 dot = strrchr(filename, '.');
333 if (dot && !strcmp(dot + 1, extension))
338 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
339 AVRational *frame_rate, char *str, int size) {
341 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
343 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
344 vpcc.profile, vpcc.level, vpcc.bitdepth);
346 // Default to just vp9 in case of error while finding out profile or level
347 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
348 av_strlcpy(str, "vp9", size);
353 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
354 AVRational *frame_rate, char *str, int size)
356 const AVCodecTag *tags[2] = { NULL, NULL };
360 // common Webm codecs are not part of RFC 6381
361 for (i = 0; codecs[i].id; i++)
362 if (codecs[i].id == par->codec_id) {
363 if (codecs[i].id == AV_CODEC_ID_VP9) {
364 set_vp9_codec_str(s, par, frame_rate, str, size);
366 av_strlcpy(str, codecs[i].str, size);
371 // for codecs part of RFC 6381
372 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
373 tags[0] = ff_codec_movvideo_tags;
374 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
375 tags[0] = ff_codec_movaudio_tags;
379 tag = par->codec_tag;
381 tag = av_codec_get_tag(tags, par->codec_id);
389 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
391 tags[0] = ff_mp4_obj_type;
392 oti = av_codec_get_tag(tags, par->codec_id);
394 av_strlcatf(str, size, ".%02"PRIx32, oti);
398 if (tag == MKTAG('m', 'p', '4', 'a')) {
399 if (par->extradata_size >= 2) {
400 int aot = par->extradata[0] >> 3;
402 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
403 av_strlcatf(str, size, ".%d", aot);
405 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
406 // Unimplemented, should output ProfileLevelIndication as a decimal number
407 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
409 } else if (!strcmp(str, "avc1")) {
410 uint8_t *tmpbuf = NULL;
411 uint8_t *extradata = par->extradata;
412 int extradata_size = par->extradata_size;
415 if (extradata[0] != 1) {
417 if (avio_open_dyn_buf(&pb) < 0)
419 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
420 ffio_free_dyn_buf(&pb);
423 extradata_size = avio_close_dyn_buf(pb, &extradata);
427 if (extradata_size >= 4)
428 av_strlcatf(str, size, ".%02x%02x%02x",
429 extradata[1], extradata[2], extradata[3]);
431 } else if (!strcmp(str, "av01")) {
432 AV1SequenceParameters seq;
433 if (!par->extradata_size)
435 if (ff_av1_parse_seq_header(&seq, par->extradata, par->extradata_size) < 0)
438 av_strlcatf(str, size, ".%01u.%02u%s.%02u",
439 seq.profile, seq.level, seq.tier ? "H" : "M", seq.bitdepth);
440 if (seq.color_description_present_flag)
441 av_strlcatf(str, size, ".%01u.%01u%01u%01u.%02u.%02u.%02u.%01u",
443 seq.chroma_subsampling_x, seq.chroma_subsampling_y, seq.chroma_sample_position,
444 seq.color_primaries, seq.transfer_characteristics, seq.matrix_coefficients,
449 static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
454 return AVERROR(EINVAL);
458 av_write_frame(os->ctx, NULL);
459 avio_flush(os->ctx->pb);
461 if (!c->single_file) {
463 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
466 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
471 return avio_open_dyn_buf(&os->ctx->pb);
473 *range_length = avio_tell(os->ctx->pb) - os->pos;
478 static void set_http_options(AVDictionary **options, DASHContext *c)
481 av_dict_set(options, "method", c->method, 0);
483 av_dict_parse_string(options, c->http_opts, "=", ",", 0);
485 av_dict_set(options, "user_agent", c->user_agent, 0);
486 if (c->http_persistent)
487 av_dict_set_int(options, "multiple_requests", 1, 0);
489 av_dict_set_int(options, "timeout", c->timeout, 0);
492 static void get_hls_playlist_name(char *playlist_name, int string_size,
493 const char *base_url, int id) {
495 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
497 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
500 static void get_start_index_number(OutputStream *os, DASHContext *c,
501 int *start_index, int *start_number) {
504 if (c->window_size) {
505 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
506 *start_number = FFMAX(os->segment_index - c->window_size, 1);
510 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
511 int representation_id, int final,
512 char *prefetch_url) {
513 DASHContext *c = s->priv_data;
514 int timescale = os->ctx->streams[0]->time_base.den;
515 char temp_filename_hls[1024];
516 char filename_hls[1024];
517 AVDictionary *http_opts = NULL;
518 int target_duration = 0;
520 const char *proto = avio_find_protocol_name(c->dirname);
521 int use_rename = proto && !strcmp(proto, "file");
522 int i, start_index, start_number;
523 double prog_date_time = 0;
525 get_start_index_number(os, c, &start_index, &start_number);
527 if (!c->hls_playlist || start_index >= os->nb_segments ||
528 os->segment_type != SEGMENT_TYPE_MP4)
531 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
532 c->dirname, representation_id);
534 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
536 set_http_options(&http_opts, c);
537 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
538 av_dict_free(&http_opts);
540 handle_io_open_error(s, ret, temp_filename_hls);
543 for (i = start_index; i < os->nb_segments; i++) {
544 Segment *seg = os->segments[i];
545 double duration = (double) seg->duration / timescale;
546 if (target_duration <= duration)
547 target_duration = lrint(duration);
550 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
551 start_number, PLAYLIST_TYPE_NONE, 0);
553 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
554 os->init_range_length, os->init_start_pos);
556 for (i = start_index; i < os->nb_segments; i++) {
557 Segment *seg = os->segments[i];
559 if (prog_date_time == 0) {
560 if (os->nb_segments == 1)
561 prog_date_time = c->start_time_s;
563 prog_date_time = seg->prog_date_time;
565 seg->prog_date_time = prog_date_time;
567 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
568 (double) seg->duration / timescale, 0,
569 seg->range_length, seg->start_pos, NULL,
570 c->single_file ? os->initfile : seg->file,
571 &prog_date_time, 0, 0, 0);
573 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
578 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
581 ff_hls_write_end_list(c->m3u8_out);
583 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
586 ff_rename(temp_filename_hls, filename_hls, os->ctx);
589 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
591 DASHContext *c = s->priv_data;
592 int ret, range_length;
594 ret = flush_dynbuf(c, os, &range_length);
598 os->pos = os->init_range_length = range_length;
599 if (!c->single_file) {
601 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
602 dashenc_io_close(s, &os->out, filename);
607 static void dash_free(AVFormatContext *s)
609 DASHContext *c = s->priv_data;
613 for (i = 0; i < c->nb_as; i++) {
614 av_dict_free(&c->as[i].metadata);
615 av_freep(&c->as[i].descriptor);
623 for (i = 0; i < s->nb_streams; i++) {
624 OutputStream *os = &c->streams[i];
625 if (os->ctx && os->ctx->pb) {
627 ffio_free_dyn_buf(&os->ctx->pb);
629 avio_close(os->ctx->pb);
631 ff_format_io_close(s, &os->out);
632 avformat_free_context(os->ctx);
633 avcodec_free_context(&os->parser_avctx);
634 av_parser_close(os->parser);
635 for (j = 0; j < os->nb_segments; j++)
636 av_free(os->segments[j]);
637 av_free(os->segments);
638 av_freep(&os->single_file_name);
639 av_freep(&os->init_seg_name);
640 av_freep(&os->media_seg_name);
642 av_freep(&c->streams);
644 ff_format_io_close(s, &c->mpd_out);
645 ff_format_io_close(s, &c->m3u8_out);
648 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
649 int representation_id, int final)
651 DASHContext *c = s->priv_data;
652 int i, start_index, start_number;
653 get_start_index_number(os, c, &start_index, &start_number);
655 if (c->use_template) {
656 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
657 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
658 if (!c->use_timeline) {
659 avio_printf(out, "duration=\"%"PRId64"\" ", os->seg_duration);
660 if (c->streaming && os->availability_time_offset)
661 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
662 os->availability_time_offset);
664 if (c->ldash && !final && os->frag_type != FRAG_TYPE_NONE &&
665 (os->frag_type != FRAG_TYPE_DURATION || os->frag_duration != os->seg_duration))
666 avio_printf(out, "availabilityTimeComplete=\"false\" ");
668 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\"", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
669 if (c->presentation_time_offset)
670 avio_printf(out, " presentationTimeOffset=\"%"PRId64"\"", c->presentation_time_offset);
671 avio_printf(out, ">\n");
672 if (c->use_timeline) {
673 int64_t cur_time = 0;
674 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
675 for (i = start_index; i < os->nb_segments; ) {
676 Segment *seg = os->segments[i];
678 avio_printf(out, "\t\t\t\t\t\t<S ");
679 if (i == start_index || seg->time != cur_time) {
680 cur_time = seg->time;
681 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
683 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
684 while (i + repeat + 1 < os->nb_segments &&
685 os->segments[i + repeat + 1]->duration == seg->duration &&
686 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
689 avio_printf(out, "r=\"%d\" ", repeat);
690 avio_printf(out, "/>\n");
692 cur_time += (1 + repeat) * seg->duration;
694 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
696 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
697 } else if (c->single_file) {
698 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
699 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, FFMIN(os->seg_duration, os->last_duration), start_number);
700 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);
701 for (i = start_index; i < os->nb_segments; i++) {
702 Segment *seg = os->segments[i];
703 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
704 if (seg->index_length)
705 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
706 avio_printf(out, "/>\n");
708 avio_printf(out, "\t\t\t\t</SegmentList>\n");
710 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, FFMIN(os->seg_duration, os->last_duration), start_number);
711 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
712 for (i = start_index; i < os->nb_segments; i++) {
713 Segment *seg = os->segments[i];
714 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
716 avio_printf(out, "\t\t\t\t</SegmentList>\n");
718 if (!c->lhls || final) {
719 write_hls_media_playlist(os, s, representation_id, final, NULL);
724 static char *xmlescape(const char *str) {
725 int outlen = strlen(str)*3/2 + 6;
726 char *out = av_realloc(NULL, outlen + 1);
730 for (; *str; str++) {
731 if (pos + 6 > outlen) {
733 outlen = 2 * outlen + 6;
734 tmp = av_realloc(out, outlen + 1);
742 memcpy(&out[pos], "&", 5);
744 } else if (*str == '<') {
745 memcpy(&out[pos], "<", 4);
747 } else if (*str == '>') {
748 memcpy(&out[pos], ">", 4);
750 } else if (*str == '\'') {
751 memcpy(&out[pos], "'", 6);
753 } else if (*str == '\"') {
754 memcpy(&out[pos], """, 6);
764 static void write_time(AVIOContext *out, int64_t time)
766 int seconds = time / AV_TIME_BASE;
767 int fractions = time % AV_TIME_BASE;
768 int minutes = seconds / 60;
769 int hours = minutes / 60;
772 avio_printf(out, "PT");
774 avio_printf(out, "%dH", hours);
775 if (hours || minutes)
776 avio_printf(out, "%dM", minutes);
777 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
780 static void format_date(char *buf, int size, int64_t time_us)
782 struct tm *ptm, tmbuf;
783 int64_t time_ms = time_us / 1000;
784 const time_t time_s = time_ms / 1000;
785 int millisec = time_ms - (time_s * 1000);
786 ptm = gmtime_r(&time_s, &tmbuf);
789 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
794 snprintf(buf + len, size - len, ".%03dZ", millisec);
798 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
801 DASHContext *c = s->priv_data;
802 AdaptationSet *as = &c->as[as_index];
803 AVDictionaryEntry *lang, *role;
806 avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
807 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
808 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)
809 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
810 else 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))
811 avio_printf(out, " frameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
812 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
813 avio_printf(out, " maxWidth=\"%d\" maxHeight=\"%d\"", as->max_width, as->max_height);
814 avio_printf(out, " par=\"%d:%d\"", as->par.num, as->par.den);
816 lang = av_dict_get(as->metadata, "language", NULL, 0);
818 avio_printf(out, " lang=\"%s\"", lang->value);
819 avio_printf(out, ">\n");
821 if (!final && c->ldash && as->max_frag_duration)
822 avio_printf(out, "\t\t\t<Resync dT=\"%"PRId64"\" type=\"0\"/>\n", as->max_frag_duration);
823 role = av_dict_get(as->metadata, "role", NULL, 0);
825 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
827 avio_printf(out, "\t\t\t%s\n", as->descriptor);
828 for (i = 0; i < s->nb_streams; i++) {
829 AVStream *st = s->streams[i];
830 OutputStream *os = &c->streams[i];
831 char bandwidth_str[64] = {'\0'};
833 if (os->as_idx - 1 != as_index)
836 if (os->bit_rate > 0)
837 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
840 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
841 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
842 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
843 if (st->codecpar->field_order == AV_FIELD_UNKNOWN)
844 avio_printf(out, " scanType=\"unknown\"");
845 else if (st->codecpar->field_order != AV_FIELD_PROGRESSIVE)
846 avio_printf(out, " scanType=\"interlaced\"");
847 avio_printf(out, " sar=\"%d:%d\"", os->sar.num, os->sar.den);
848 if (st->avg_frame_rate.num && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
849 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
850 avio_printf(out, ">\n");
852 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
853 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
854 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
855 s->streams[i]->codecpar->channels);
857 if (!final && c->write_prft && os->producer_reference_time_str[0]) {
858 avio_printf(out, "\t\t\t\t<ProducerReferenceTime id=\"%d\" inband=\"true\" type=\"encoder\" wallclockTime=\"%s\" presentationTime=\"%"PRId64"\">\n",
859 i, os->producer_reference_time_str, c->presentation_time_offset);
860 avio_printf(out, "\t\t\t\t\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
861 avio_printf(out, "\t\t\t\t</ProducerReferenceTime>\n");
863 if (!final && c->ldash && os->gop_size && os->frag_type != FRAG_TYPE_NONE &&
864 (os->frag_type != FRAG_TYPE_DURATION || os->frag_duration != os->seg_duration))
865 avio_printf(out, "\t\t\t\t<Resync dT=\"%"PRId64"\" type=\"1\"/>\n", os->gop_size);
866 output_segment_list(os, out, s, i, final);
867 avio_printf(out, "\t\t\t</Representation>\n");
869 avio_printf(out, "\t\t</AdaptationSet>\n");
874 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
876 DASHContext *c = s->priv_data;
879 if (c->profile & MPD_PROFILE_DVB && (c->nb_as + 1) > 16) {
880 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Adaptation Sets\n");
881 return AVERROR(EINVAL);
883 mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
885 return AVERROR(ENOMEM);
889 *as = &c->as[c->nb_as - 1];
890 memset(*as, 0, sizeof(**as));
891 (*as)->media_type = type;
892 (*as)->frag_type = -1;
897 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
899 DASHContext *c = s->priv_data;
900 AdaptationSet *as = &c->as[as_idx - 1];
901 OutputStream *os = &c->streams[i];
903 if (as->media_type != s->streams[i]->codecpar->codec_type) {
904 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
905 return AVERROR(EINVAL);
906 } else if (os->as_idx) {
907 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
908 return AVERROR(EINVAL);
910 if (c->profile & MPD_PROFILE_DVB && (as->nb_streams + 1) > 16) {
911 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Representations per Adaptation Set\n");
912 return AVERROR(EINVAL);
920 static int parse_adaptation_sets(AVFormatContext *s)
922 DASHContext *c = s->priv_data;
923 const char *p = c->adaptation_sets;
924 enum { new_set, parse_default, parsing_streams, parse_seg_duration, parse_frag_duration } state;
928 // default: one AdaptationSet for each stream
930 for (i = 0; i < s->nb_streams; i++) {
931 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
933 snprintf(as->id, sizeof(as->id), "%d", i);
935 c->streams[i].as_idx = c->nb_as;
941 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
942 // option id=0,descriptor=descriptor_str,streams=0,1,2 and so on
943 // option id=0,seg_duration=2.5,frag_duration=0.5,streams=0,1,2 and so on
944 // descriptor is useful to the scheme defined by ISO/IEC 23009-1:2014/Amd.2:2015
945 // descriptor_str should be a self-closing xml tag.
946 // seg_duration and frag_duration have the same syntax as the global options of
947 // the same name, and the former have precedence over them if set.
953 } else if (state == new_set && av_strstart(p, "id=", &p)) {
955 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
959 snprintf(as->id, sizeof(as->id), "%.*s", n, p);
964 state = parse_default;
965 } else if (state != new_set && av_strstart(p, "seg_duration=", &p)) {
966 state = parse_seg_duration;
967 } else if (state != new_set && av_strstart(p, "frag_duration=", &p)) {
968 state = parse_frag_duration;
969 } else if (state == parse_seg_duration || state == parse_frag_duration) {
974 snprintf(str, sizeof(str), "%.*s", n, p);
979 ret = av_parse_time(&usecs, str, 1);
981 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", str);
985 if (state == parse_seg_duration)
986 as->seg_duration = usecs;
988 as->frag_duration = usecs;
989 state = parse_default;
990 } else if (state != new_set && av_strstart(p, "frag_type=", &p)) {
994 snprintf(type_str, sizeof(type_str), "%.*s", n, p);
999 if (!strcmp(type_str, "duration"))
1000 as->frag_type = FRAG_TYPE_DURATION;
1001 else if (!strcmp(type_str, "pframes"))
1002 as->frag_type = FRAG_TYPE_PFRAMES;
1003 else if (!strcmp(type_str, "every_frame"))
1004 as->frag_type = FRAG_TYPE_EVERY_FRAME;
1005 else if (!strcmp(type_str, "none"))
1006 as->frag_type = FRAG_TYPE_NONE;
1008 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as fragment type\n", type_str);
1011 state = parse_default;
1012 } else if (state != new_set && av_strstart(p, "descriptor=", &p)) {
1013 n = strcspn(p, ">") + 1; //followed by one comma, so plus 1
1014 if (n < strlen(p)) {
1015 as->descriptor = av_strndup(p, n);
1017 av_log(s, AV_LOG_ERROR, "Parse error, descriptor string should be a self-closing xml tag\n");
1018 return AVERROR(EINVAL);
1023 state = parse_default;
1024 } else if ((state != new_set) && av_strstart(p, "streams=", &p)) { //descriptor and durations are optional
1025 state = parsing_streams;
1026 } else if (state == parsing_streams) {
1027 AdaptationSet *as = &c->as[c->nb_as - 1];
1028 char idx_str[8], *end_str;
1030 n = strcspn(p, " ,");
1031 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
1034 // if value is "a" or "v", map all streams of that type
1035 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
1036 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
1037 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
1039 for (i = 0; i < s->nb_streams; i++) {
1040 if (s->streams[i]->codecpar->codec_type != type)
1043 as->media_type = s->streams[i]->codecpar->codec_type;
1045 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1048 } else { // select single stream
1049 i = strtol(idx_str, &end_str, 10);
1050 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
1051 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
1052 return AVERROR(EINVAL);
1054 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
1056 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
1057 as->media_type = s->streams[i]->codecpar->codec_type;
1060 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1069 return AVERROR(EINVAL);
1074 // check for unassigned streams
1075 for (i = 0; i < s->nb_streams; i++) {
1076 OutputStream *os = &c->streams[i];
1078 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
1079 return AVERROR(EINVAL);
1085 static int write_manifest(AVFormatContext *s, int final)
1087 DASHContext *c = s->priv_data;
1089 char temp_filename[1024];
1091 const char *proto = avio_find_protocol_name(s->url);
1092 int use_rename = proto && !strcmp(proto, "file");
1093 static unsigned int warned_non_file = 0;
1094 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
1095 AVDictionary *opts = NULL;
1097 if (!use_rename && !warned_non_file++)
1098 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
1100 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
1101 set_http_options(&opts, c);
1102 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
1103 av_dict_free(&opts);
1105 return handle_io_open_error(s, ret, temp_filename);
1108 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
1109 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1110 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
1111 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
1112 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
1114 if (c->profile & MPD_PROFILE_DASH)
1115 avio_printf(out, "%s%s", "urn:mpeg:dash:profile:isoff-live:2011", c->profile & MPD_PROFILE_DVB ? "," : "\"\n");
1116 if (c->profile & MPD_PROFILE_DVB)
1117 avio_printf(out, "%s", "urn:dvb:dash:profile:dvb-dash:2014\"\n");
1118 avio_printf(out, "\ttype=\"%s\"\n",
1119 final ? "static" : "dynamic");
1121 avio_printf(out, "\tmediaPresentationDuration=\"");
1122 write_time(out, c->total_duration);
1123 avio_printf(out, "\"\n");
1125 int64_t update_period = c->last_duration / AV_TIME_BASE;
1127 if (c->use_template && !c->use_timeline)
1128 update_period = 500;
1129 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
1131 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
1132 if (c->availability_start_time[0])
1133 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
1134 format_date(now_str, sizeof(now_str), av_gettime());
1136 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
1137 if (c->window_size && c->use_template) {
1138 avio_printf(out, "\ttimeShiftBufferDepth=\"");
1139 write_time(out, c->last_duration * c->window_size);
1140 avio_printf(out, "\"\n");
1143 avio_printf(out, "\tminBufferTime=\"");
1144 write_time(out, c->ldash && c->max_gop_size ? c->max_gop_size : c->last_duration * 2);
1145 avio_printf(out, "\">\n");
1146 avio_printf(out, "\t<ProgramInformation>\n");
1148 char *escaped = xmlescape(title->value);
1149 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
1152 avio_printf(out, "\t</ProgramInformation>\n");
1153 if (!final && c->target_latency && c->target_latency_refid >= 0) {
1154 avio_printf(out, "\t<ServiceDescription id=\"0\">\n");
1155 avio_printf(out, "\t\t<Latency target=\"%"PRId64"\"", c->target_latency / 1000);
1156 if (s->nb_streams > 1)
1157 avio_printf(out, " referenceId=\"%d\"", c->target_latency_refid);
1158 avio_printf(out, "/>\n");
1159 avio_printf(out, "\t</ServiceDescription>\n");
1162 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
1163 OutputStream *os = &c->streams[0];
1164 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
1165 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
1166 avio_printf(out, "\t<Period id=\"0\" start=\"");
1167 write_time(out, start_time);
1168 avio_printf(out, "\">\n");
1170 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
1173 for (i = 0; i < c->nb_as; i++) {
1174 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
1177 avio_printf(out, "\t</Period>\n");
1179 if (c->utc_timing_url)
1180 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
1182 avio_printf(out, "</MPD>\n");
1184 dashenc_io_close(s, &c->mpd_out, temp_filename);
1187 if ((ret = ff_rename(temp_filename, s->url, s)) < 0)
1191 if (c->hls_playlist) {
1192 char filename_hls[1024];
1193 const char *audio_group = "A1";
1194 char audio_codec_str[128] = "\0";
1196 int max_audio_bitrate = 0;
1198 // Publish master playlist only the configured rate
1199 if (c->master_playlist_created && (!c->master_publish_rate ||
1200 c->streams[0].segment_index % c->master_publish_rate))
1204 snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname);
1206 snprintf(filename_hls, sizeof(filename_hls), "master.m3u8");
1208 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1210 set_http_options(&opts, c);
1211 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1212 av_dict_free(&opts);
1214 return handle_io_open_error(s, ret, temp_filename);
1217 ff_hls_write_playlist_version(c->m3u8_out, 7);
1219 for (i = 0; i < s->nb_streams; i++) {
1220 char playlist_file[64];
1221 AVStream *st = s->streams[i];
1222 OutputStream *os = &c->streams[i];
1223 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1225 if (os->segment_type != SEGMENT_TYPE_MP4)
1227 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1228 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1229 playlist_file, NULL, i, is_default);
1230 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1231 os->muxer_overhead, max_audio_bitrate);
1232 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1233 if (strlen(audio_codec_str))
1234 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1235 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1240 for (i = 0; i < s->nb_streams; i++) {
1241 char playlist_file[64];
1242 char codec_str[128];
1243 AVStream *st = s->streams[i];
1244 OutputStream *os = &c->streams[i];
1245 char *agroup = NULL;
1246 char *codec_str_ptr = NULL;
1247 int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead;
1248 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1250 if (os->segment_type != SEGMENT_TYPE_MP4)
1252 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1253 if (max_audio_bitrate) {
1254 agroup = (char *)audio_group;
1255 stream_bitrate += max_audio_bitrate;
1256 av_strlcat(codec_str, ",", sizeof(codec_str));
1257 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1259 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1260 codec_str_ptr = codec_str;
1262 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1263 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1264 playlist_file, agroup,
1265 codec_str_ptr, NULL);
1267 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1269 if ((ret = ff_rename(temp_filename, filename_hls, s)) < 0)
1271 c->master_playlist_created = 1;
1277 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1279 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1281 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1285 static int dash_init(AVFormatContext *s)
1287 DASHContext *c = s->priv_data;
1290 char basename[1024];
1292 c->nr_of_streams_to_flush = 0;
1293 if (c->single_file_name)
1296 c->use_template = 0;
1299 av_log(s, AV_LOG_ERROR, "At least one profile must be enabled.\n");
1300 return AVERROR(EINVAL);
1302 #if FF_API_DASH_MIN_SEG_DURATION
1303 if (c->min_seg_duration != 5000000) {
1304 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1305 c->seg_duration = c->min_seg_duration;
1308 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1309 av_log(s, AV_LOG_ERROR,
1310 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1311 return AVERROR_EXPERIMENTAL;
1314 if (c->lhls && !c->streaming) {
1315 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1319 if (c->lhls && !c->hls_playlist) {
1320 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1324 if (c->ldash && !c->streaming) {
1325 av_log(s, AV_LOG_WARNING, "LDash option will be ignored as streaming is not enabled\n");
1329 if (c->target_latency && !c->streaming) {
1330 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as streaming is not enabled\n");
1331 c->target_latency = 0;
1334 if (c->global_sidx && !c->single_file) {
1335 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1339 if (c->global_sidx && c->streaming) {
1340 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1343 if (c->frag_type == FRAG_TYPE_NONE && c->streaming) {
1344 av_log(s, AV_LOG_VERBOSE, "Changing frag_type from none to every_frame as streaming is enabled\n");
1345 c->frag_type = FRAG_TYPE_EVERY_FRAME;
1348 if (c->write_prft && !c->utc_timing_url) {
1349 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as utc_timing_url is not set\n");
1353 if (c->write_prft && !c->streaming) {
1354 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as streaming is not enabled\n");
1358 if (c->target_latency && !c->write_prft) {
1359 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as Producer Reference Time element will not be written\n");
1360 c->target_latency = 0;
1363 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1364 ptr = strrchr(c->dirname, '/');
1366 av_strlcpy(basename, &ptr[1], sizeof(basename));
1369 c->dirname[0] = '\0';
1370 av_strlcpy(basename, s->url, sizeof(basename));
1373 ptr = strrchr(basename, '.');
1377 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1379 return AVERROR(ENOMEM);
1381 if ((ret = parse_adaptation_sets(s)) < 0)
1384 if ((ret = init_segment_types(s)) < 0)
1387 for (i = 0; i < s->nb_streams; i++) {
1388 OutputStream *os = &c->streams[i];
1389 AdaptationSet *as = &c->as[os->as_idx - 1];
1390 AVFormatContext *ctx;
1392 AVDictionary *opts = NULL;
1393 char filename[1024];
1395 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1396 if (!os->bit_rate) {
1397 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1398 AV_LOG_ERROR : AV_LOG_WARNING;
1399 av_log(s, level, "No bit rate set for stream %d\n", i);
1400 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1401 return AVERROR(EINVAL);
1404 // copy AdaptationSet language and role from stream metadata
1405 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1406 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1408 if (c->init_seg_name) {
1409 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->extension_name);
1410 if (!os->init_seg_name)
1411 return AVERROR(ENOMEM);
1413 if (c->media_seg_name) {
1414 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->extension_name);
1415 if (!os->media_seg_name)
1416 return AVERROR(ENOMEM);
1418 if (c->single_file_name) {
1419 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->extension_name);
1420 if (!os->single_file_name)
1421 return AVERROR(ENOMEM);
1424 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1425 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1426 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1427 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1428 av_log(s, AV_LOG_WARNING,
1429 "One or many segment file names doesn't end with .webm. "
1430 "Override -init_seg_name and/or -media_seg_name and/or "
1431 "-single_file_name to end with the extension .webm\n");
1434 // Streaming not supported as matroskaenc buffers internally before writing the output
1435 av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1440 os->ctx = ctx = avformat_alloc_context();
1442 return AVERROR(ENOMEM);
1444 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1446 return AVERROR_MUXER_NOT_FOUND;
1447 ctx->interrupt_callback = s->interrupt_callback;
1448 ctx->opaque = s->opaque;
1449 ctx->io_close = s->io_close;
1450 ctx->io_open = s->io_open;
1451 ctx->strict_std_compliance = s->strict_std_compliance;
1453 if (!(st = avformat_new_stream(ctx, NULL)))
1454 return AVERROR(ENOMEM);
1455 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1456 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1457 st->time_base = s->streams[i]->time_base;
1458 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1459 ctx->avoid_negative_ts = s->avoid_negative_ts;
1460 ctx->flags = s->flags;
1462 os->parser = av_parser_init(st->codecpar->codec_id);
1464 os->parser_avctx = avcodec_alloc_context3(NULL);
1465 if (!os->parser_avctx)
1466 return AVERROR(ENOMEM);
1467 ret = avcodec_parameters_to_context(os->parser_avctx, st->codecpar);
1470 // We only want to parse frame headers
1471 os->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1474 if (c->single_file) {
1475 if (os->single_file_name)
1476 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1478 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1480 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1482 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1483 set_http_options(&opts, c);
1484 if (!c->single_file) {
1485 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1487 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1489 ctx->url = av_strdup(filename);
1490 ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1492 av_dict_free(&opts);
1495 os->init_start_pos = 0;
1497 av_dict_copy(&opts, c->format_options, 0);
1498 if (!as->seg_duration)
1499 as->seg_duration = c->seg_duration;
1500 if (!as->frag_duration)
1501 as->frag_duration = c->frag_duration;
1502 if (as->frag_type < 0)
1503 as->frag_type = c->frag_type;
1504 os->seg_duration = as->seg_duration;
1505 os->frag_duration = as->frag_duration;
1506 os->frag_type = as->frag_type;
1508 if (c->profile & MPD_PROFILE_DVB && (os->seg_duration > 15000000 || os->seg_duration < 960000)) {
1509 av_log(s, AV_LOG_ERROR, "Segment duration %"PRId64" is outside the allowed range for DVB-DASH profile\n", os->seg_duration);
1510 return AVERROR(EINVAL);
1513 if (os->frag_type == FRAG_TYPE_DURATION && !os->frag_duration) {
1514 av_log(s, AV_LOG_WARNING, "frag_type set to duration for stream %d but no frag_duration set\n", i);
1515 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1517 if (os->frag_type == FRAG_TYPE_DURATION && os->frag_duration > os->seg_duration) {
1518 av_log(s, AV_LOG_ERROR, "Fragment duration %"PRId64" is longer than Segment duration %"PRId64"\n", os->frag_duration, os->seg_duration);
1519 return AVERROR(EINVAL);
1521 if (os->frag_type == FRAG_TYPE_PFRAMES && (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO || !os->parser)) {
1522 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && !os->parser)
1523 av_log(s, AV_LOG_WARNING, "frag_type set to P-Frame reordering, but no parser found for stream %d\n", i);
1524 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1527 if (os->segment_type == SEGMENT_TYPE_MP4) {
1529 // skip_sidx : Reduce bitrate overhead
1530 // skip_trailer : Avoids growing memory usage with time
1531 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_sidx+skip_trailer", AV_DICT_APPEND);
1534 av_dict_set(&opts, "movflags", "+dash+delay_moov+global_sidx+skip_trailer", AV_DICT_APPEND);
1536 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_trailer", AV_DICT_APPEND);
1538 if (os->frag_type == FRAG_TYPE_EVERY_FRAME)
1539 av_dict_set(&opts, "movflags", "+frag_every_frame", AV_DICT_APPEND);
1541 av_dict_set(&opts, "movflags", "+frag_custom", AV_DICT_APPEND);
1542 if (os->frag_type == FRAG_TYPE_DURATION)
1543 av_dict_set_int(&opts, "frag_duration", os->frag_duration, 0);
1545 av_dict_set(&opts, "write_prft", "wallclock", 0);
1547 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1548 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1549 av_dict_set_int(&opts, "dash", 1, 0);
1550 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1551 av_dict_set_int(&opts, "live", 1, 0);
1553 ret = avformat_init_output(ctx, &opts);
1554 av_dict_free(&opts);
1558 avio_flush(ctx->pb);
1560 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1562 s->streams[i]->time_base = st->time_base;
1563 // If the muxer wants to shift timestamps, request to have them shifted
1564 // already before being handed to this muxer, so we don't have mismatches
1565 // between the MPD and the actual segments.
1566 s->avoid_negative_ts = ctx->avoid_negative_ts;
1567 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1568 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1570 if (avg_frame_rate.num > 0) {
1571 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1572 as->min_frame_rate = avg_frame_rate;
1573 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1574 as->max_frame_rate = avg_frame_rate;
1576 as->ambiguous_frame_rate = 1;
1579 if (st->codecpar->width > as->max_width)
1580 as->max_width = st->codecpar->width;
1581 if (st->codecpar->height > as->max_height)
1582 as->max_height = st->codecpar->height;
1584 if (st->sample_aspect_ratio.num)
1585 os->sar = st->sample_aspect_ratio;
1587 os->sar = (AVRational){1,1};
1588 av_reduce(&par.num, &par.den,
1589 st->codecpar->width * (int64_t)os->sar.num,
1590 st->codecpar->height * (int64_t)os->sar.den,
1593 if (as->par.num && av_cmp_q(par, as->par)) {
1594 av_log(s, AV_LOG_ERROR, "Conflicting stream par values in Adaptation Set %d\n", os->as_idx);
1595 return AVERROR(EINVAL);
1602 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1603 sizeof(os->codec_str));
1604 os->first_pts = AV_NOPTS_VALUE;
1605 os->max_pts = AV_NOPTS_VALUE;
1606 os->last_dts = AV_NOPTS_VALUE;
1607 os->segment_index = 1;
1609 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1610 c->nr_of_streams_to_flush++;
1613 if (!c->has_video && c->seg_duration <= 0) {
1614 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1615 return AVERROR(EINVAL);
1617 if (!c->has_video && c->frag_type == FRAG_TYPE_PFRAMES)
1618 av_log(s, AV_LOG_WARNING, "no video stream and P-frame fragmentation set\n");
1620 c->nr_of_streams_flushed = 0;
1621 c->target_latency_refid = -1;
1626 static int dash_write_header(AVFormatContext *s)
1628 DASHContext *c = s->priv_data;
1630 for (i = 0; i < s->nb_streams; i++) {
1631 OutputStream *os = &c->streams[i];
1632 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1635 // Flush init segment
1636 // Only for WebM segment, since for mp4 delay_moov is set and
1637 // the init segment is thus flushed after the first packets.
1638 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1639 (ret = flush_init_segment(s, os)) < 0)
1645 static int add_segment(OutputStream *os, const char *file,
1646 int64_t time, int64_t duration,
1647 int64_t start_pos, int64_t range_length,
1648 int64_t index_length, int next_exp_index)
1652 if (os->nb_segments >= os->segments_size) {
1653 os->segments_size = (os->segments_size + 1) * 2;
1654 if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
1655 os->segments_size)) < 0) {
1656 os->segments_size = 0;
1657 os->nb_segments = 0;
1661 seg = av_mallocz(sizeof(*seg));
1663 return AVERROR(ENOMEM);
1664 av_strlcpy(seg->file, file, sizeof(seg->file));
1666 seg->duration = duration;
1667 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1668 seg->duration += seg->time;
1671 seg->start_pos = start_pos;
1672 seg->range_length = range_length;
1673 seg->index_length = index_length;
1674 os->segments[os->nb_segments++] = seg;
1675 os->segment_index++;
1676 //correcting the segment index if it has fallen behind the expected value
1677 if (os->segment_index < next_exp_index) {
1678 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1679 file, os->segment_index, next_exp_index);
1680 os->segment_index = next_exp_index;
1685 static void write_styp(AVIOContext *pb)
1688 ffio_wfourcc(pb, "styp");
1689 ffio_wfourcc(pb, "msdh");
1690 avio_wb32(pb, 0); /* minor */
1691 ffio_wfourcc(pb, "msdh");
1692 ffio_wfourcc(pb, "msix");
1695 static void find_index_range(AVFormatContext *s, const char *full_path,
1696 int64_t pos, int *index_length)
1702 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1705 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1706 ff_format_io_close(s, &pb);
1709 ret = avio_read(pb, buf, 8);
1710 ff_format_io_close(s, &pb);
1713 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1715 *index_length = AV_RB32(&buf[0]);
1718 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1719 AVPacket *pkt, AVRational *frame_rate)
1721 AVCodecParameters *par = os->ctx->streams[0]->codecpar;
1723 int ret, extradata_size;
1725 if (par->extradata_size)
1728 extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &extradata_size);
1729 if (!extradata_size)
1732 ret = ff_alloc_extradata(par, extradata_size);
1736 memcpy(par->extradata, extradata, extradata_size);
1738 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1743 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1744 DASHContext *c = s->priv_data;
1745 int http_base_proto = ff_is_http_proto(filename);
1747 if (http_base_proto) {
1748 AVIOContext *out = NULL;
1749 AVDictionary *http_opts = NULL;
1751 set_http_options(&http_opts, c);
1752 av_dict_set(&http_opts, "method", "DELETE", 0);
1754 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1755 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1758 av_dict_free(&http_opts);
1759 ff_format_io_close(s, &out);
1761 int res = avpriv_io_delete(filename);
1763 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1764 av_strerror(res, errbuf, sizeof(errbuf));
1765 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1770 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1772 DASHContext *c = s->priv_data;
1773 size_t dirname_len, file_len;
1774 char filename[1024];
1776 dirname_len = strlen(c->dirname);
1777 if (dirname_len >= sizeof(filename)) {
1778 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the directory path is too long: %"PRIu64" characters: %s\n",
1779 (uint64_t)dirname_len, c->dirname);
1780 return AVERROR(ENAMETOOLONG);
1783 memcpy(filename, c->dirname, dirname_len);
1785 file_len = strlen(file);
1786 if ((dirname_len + file_len) >= sizeof(filename)) {
1787 av_log(s, AV_LOG_WARNING, "Cannot delete segments as the path is too long: %"PRIu64" characters: %s%s\n",
1788 (uint64_t)(dirname_len + file_len), c->dirname, file);
1789 return AVERROR(ENAMETOOLONG);
1792 memcpy(filename + dirname_len, file, file_len + 1); // include the terminating zero
1793 dashenc_delete_file(s, filename);
1798 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1800 for (int i = 0; i < remove_count; ++i) {
1801 dashenc_delete_segment_file(s, os->segments[i]->file);
1803 // Delete the segment regardless of whether the file was successfully deleted
1804 av_free(os->segments[i]);
1807 os->nb_segments -= remove_count;
1808 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1811 static int dash_flush(AVFormatContext *s, int final, int stream)
1813 DASHContext *c = s->priv_data;
1816 const char *proto = avio_find_protocol_name(s->url);
1817 int use_rename = proto && !strcmp(proto, "file");
1819 int cur_flush_segment_index = 0, next_exp_index = -1;
1821 cur_flush_segment_index = c->streams[stream].segment_index;
1823 //finding the next segment's expected index, based on the current pts value
1824 if (c->use_template && !c->use_timeline && c->index_correction &&
1825 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1826 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1827 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1828 c->streams[stream].first_pts,
1829 s->streams[stream]->time_base,
1831 next_exp_index = (pts_diff / c->streams[stream].seg_duration) + 1;
1835 for (i = 0; i < s->nb_streams; i++) {
1836 OutputStream *os = &c->streams[i];
1837 AVStream *st = s->streams[i];
1838 int range_length, index_length = 0;
1840 if (!os->packets_written)
1843 // Flush the single stream that got a keyframe right now.
1844 // Flush all audio streams as well, in sync with video keyframes,
1845 // but not the other video streams.
1846 if (stream >= 0 && i != stream) {
1847 if (s->streams[stream]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
1848 s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1850 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1852 // Make sure we don't flush audio streams multiple times, when
1853 // all video streams are flushed one at a time.
1854 if (c->has_video && os->segment_index > cur_flush_segment_index)
1858 if (!c->single_file) {
1859 if (os->segment_type == SEGMENT_TYPE_MP4 && !os->written_len)
1860 write_styp(os->ctx->pb);
1862 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1865 ret = flush_dynbuf(c, os, &range_length);
1868 os->packets_written = 0;
1870 if (c->single_file) {
1871 find_index_range(s, os->full_path, os->pos, &index_length);
1873 dashenc_io_close(s, &os->out, os->temp_path);
1876 ret = ff_rename(os->temp_path, os->full_path, os->ctx);
1882 os->last_duration = FFMAX(os->last_duration, av_rescale_q(os->max_pts - os->start_pts,
1886 if (!os->muxer_overhead)
1887 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1889 av_rescale_q(os->max_pts - os->start_pts,
1890 st->time_base, AV_TIME_BASE_Q);
1891 os->total_pkt_size = 0;
1892 os->total_pkt_duration = 0;
1894 if (!os->bit_rate) {
1895 // calculate average bitrate of first segment
1896 int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
1900 os->bit_rate = bitrate;
1902 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1903 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1905 os->pos += range_length;
1908 if (c->window_size) {
1909 for (i = 0; i < s->nb_streams; i++) {
1910 OutputStream *os = &c->streams[i];
1911 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1912 if (remove_count > 0)
1913 dashenc_delete_media_segments(s, os, remove_count);
1918 for (i = 0; i < s->nb_streams; i++) {
1919 OutputStream *os = &c->streams[i];
1920 if (os->ctx && os->ctx_inited) {
1921 int64_t file_size = avio_tell(os->ctx->pb);
1922 av_write_trailer(os->ctx);
1923 if (c->global_sidx) {
1924 int j, start_index, start_number;
1925 int64_t sidx_size = avio_tell(os->ctx->pb) - file_size;
1926 get_start_index_number(os, c, &start_index, &start_number);
1927 if (start_index >= os->nb_segments ||
1928 os->segment_type != SEGMENT_TYPE_MP4)
1930 os->init_range_length += sidx_size;
1931 for (j = start_index; j < os->nb_segments; j++) {
1932 Segment *seg = os->segments[j];
1933 seg->start_pos += sidx_size;
1941 if (c->has_video && !final) {
1942 c->nr_of_streams_flushed++;
1943 if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
1946 c->nr_of_streams_flushed = 0;
1948 ret = write_manifest(s, final);
1953 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1955 DASHContext *c = s->priv_data;
1956 AVStream *st = s->streams[pkt->stream_index];
1957 OutputStream *os = &c->streams[pkt->stream_index];
1958 AdaptationSet *as = &c->as[os->as_idx - 1];
1959 int64_t seg_end_duration, elapsed_duration;
1962 ret = update_stream_extradata(s, os, pkt, &st->avg_frame_rate);
1966 // Fill in a heuristic guess of the packet duration, if none is available.
1967 // The mp4 muxer will do something similar (for the last packet in a fragment)
1968 // if nothing is set (setting it for the other packets doesn't hurt).
1969 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1970 // invoke its heuristic (this doesn't have to be identical to that algorithm),
1971 // so that we know the exact timestamps of fragments.
1972 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1973 pkt->duration = pkt->dts - os->last_dts;
1974 os->last_dts = pkt->dts;
1976 // If forcing the stream to start at 0, the mp4 muxer will set the start
1977 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1978 if (os->first_pts == AV_NOPTS_VALUE &&
1979 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1980 pkt->pts -= pkt->dts;
1984 if (os->first_pts == AV_NOPTS_VALUE) {
1986 AVProducerReferenceTime *prft = (AVProducerReferenceTime *)av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT,
1988 if (prft && side_data_size == sizeof(AVProducerReferenceTime) && !prft->flags) {
1989 os->producer_reference_time = prft->wallclock;
1990 if (c->target_latency_refid < 0)
1991 c->target_latency_refid = pkt->stream_index;
1993 os->first_pts = pkt->pts;
1995 os->last_pts = pkt->pts;
1997 if (!c->availability_start_time[0]) {
1998 int64_t start_time_us = av_gettime();
1999 c->start_time_s = start_time_us / 1000000;
2000 format_date(c->availability_start_time,
2001 sizeof(c->availability_start_time), start_time_us);
2004 if (!os->packets_written)
2005 os->availability_time_offset = 0;
2007 if (!os->availability_time_offset &&
2008 ((os->frag_type == FRAG_TYPE_DURATION && os->seg_duration != os->frag_duration) ||
2009 (os->frag_type == FRAG_TYPE_EVERY_FRAME && pkt->duration))) {
2010 int64_t frame_duration = 0;
2012 switch (os->frag_type) {
2013 case FRAG_TYPE_DURATION:
2014 frame_duration = os->frag_duration;
2016 case FRAG_TYPE_EVERY_FRAME:
2017 frame_duration = av_rescale_q(pkt->duration, st->time_base, AV_TIME_BASE_Q);
2021 os->availability_time_offset = ((double) os->seg_duration -
2022 frame_duration) / AV_TIME_BASE;
2023 as->max_frag_duration = FFMAX(frame_duration, as->max_frag_duration);
2026 if (c->use_template && !c->use_timeline) {
2027 elapsed_duration = pkt->pts - os->first_pts;
2028 seg_end_duration = (int64_t) os->segment_index * os->seg_duration;
2030 elapsed_duration = pkt->pts - os->start_pts;
2031 seg_end_duration = os->seg_duration;
2034 if (pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
2035 av_compare_ts(elapsed_duration, st->time_base,
2036 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
2037 if (!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2038 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
2041 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
2045 if ((!c->use_timeline || !c->use_template) && os->last_duration) {
2046 if (c->last_duration < os->last_duration*9/10 ||
2047 c->last_duration > os->last_duration*11/10) {
2048 av_log(s, AV_LOG_WARNING,
2049 "Segment durations differ too much, enable use_timeline "
2050 "and use_template, or keep a stricter keyframe interval\n");
2055 if (c->write_prft && os->producer_reference_time && !os->producer_reference_time_str[0])
2056 format_date(os->producer_reference_time_str,
2057 sizeof(os->producer_reference_time_str),
2058 os->producer_reference_time);
2060 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
2064 if (!os->packets_written) {
2065 // If we wrote a previous segment, adjust the start time of the segment
2066 // to the end of the previous one (which is the same as the mp4 muxer
2067 // does). This avoids gaps in the timeline.
2068 if (os->max_pts != AV_NOPTS_VALUE)
2069 os->start_pts = os->max_pts;
2071 os->start_pts = pkt->pts;
2073 if (os->max_pts == AV_NOPTS_VALUE)
2074 os->max_pts = pkt->pts + pkt->duration;
2076 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
2078 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2079 os->frag_type == FRAG_TYPE_PFRAMES &&
2080 os->packets_written) {
2084 av_assert0(os->parser);
2085 av_parser_parse2(os->parser, os->parser_avctx,
2086 &data, &size, pkt->data, pkt->size,
2087 pkt->pts, pkt->dts, pkt->pos);
2089 if ((os->parser->pict_type == AV_PICTURE_TYPE_P &&
2090 st->codecpar->video_delay &&
2091 !(os->last_flags & AV_PKT_FLAG_KEY)) ||
2092 pkt->flags & AV_PKT_FLAG_KEY) {
2093 ret = av_write_frame(os->ctx, NULL);
2097 if (!os->availability_time_offset) {
2098 int64_t frag_duration = av_rescale_q(os->total_pkt_duration, st->time_base,
2100 os->availability_time_offset = ((double) os->seg_duration -
2101 frag_duration) / AV_TIME_BASE;
2102 as->max_frag_duration = FFMAX(frag_duration, as->max_frag_duration);
2107 if (pkt->flags & AV_PKT_FLAG_KEY && (os->packets_written || os->nb_segments) && !os->gop_size) {
2108 os->gop_size = os->last_duration + av_rescale_q(os->total_pkt_duration, st->time_base, AV_TIME_BASE_Q);
2109 c->max_gop_size = FFMAX(c->max_gop_size, os->gop_size);
2112 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
2115 os->packets_written++;
2116 os->total_pkt_size += pkt->size;
2117 os->total_pkt_duration += pkt->duration;
2118 os->last_flags = pkt->flags;
2120 if (!os->init_range_length)
2121 flush_init_segment(s, os);
2123 //open the output context when the first frame of a segment is ready
2124 if (!c->single_file && os->packets_written == 1) {
2125 AVDictionary *opts = NULL;
2126 const char *proto = avio_find_protocol_name(s->url);
2127 int use_rename = proto && !strcmp(proto, "file");
2128 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
2129 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
2130 os->media_seg_name, pkt->stream_index,
2131 os->segment_index, os->bit_rate, os->start_pts);
2132 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
2134 snprintf(os->temp_path, sizeof(os->temp_path),
2135 use_rename ? "%s.tmp" : "%s", os->full_path);
2136 set_http_options(&opts, c);
2137 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
2138 av_dict_free(&opts);
2140 return handle_io_open_error(s, ret, os->temp_path);
2143 char *prefetch_url = use_rename ? NULL : os->filename;
2144 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
2148 //write out the data immediately in streaming mode
2149 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
2151 uint8_t *buf = NULL;
2152 if (!os->written_len)
2153 write_styp(os->ctx->pb);
2154 avio_flush(os->ctx->pb);
2155 len = avio_get_dyn_buf (os->ctx->pb, &buf);
2157 avio_write(os->out, buf + os->written_len, len - os->written_len);
2158 avio_flush(os->out);
2160 os->written_len = len;
2166 static int dash_write_trailer(AVFormatContext *s)
2168 DASHContext *c = s->priv_data;
2171 if (s->nb_streams > 0) {
2172 OutputStream *os = &c->streams[0];
2173 // If no segments have been written so far, try to do a crude
2174 // guess of the segment duration
2175 if (!c->last_duration)
2176 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
2177 s->streams[0]->time_base,
2179 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
2180 s->streams[0]->time_base,
2183 dash_flush(s, 1, -1);
2185 if (c->remove_at_exit) {
2186 for (i = 0; i < s->nb_streams; ++i) {
2187 OutputStream *os = &c->streams[i];
2188 dashenc_delete_media_segments(s, os, os->nb_segments);
2189 dashenc_delete_segment_file(s, os->initfile);
2190 if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
2191 char filename[1024];
2192 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
2193 dashenc_delete_file(s, filename);
2196 dashenc_delete_file(s, s->url);
2198 if (c->hls_playlist && c->master_playlist_created) {
2199 char filename[1024];
2200 snprintf(filename, sizeof(filename), "%smaster.m3u8", c->dirname);
2201 dashenc_delete_file(s, filename);
2208 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
2210 DASHContext *c = s->priv_data;
2211 OutputStream *os = &c->streams[avpkt->stream_index];
2212 AVFormatContext *oc = os->ctx;
2213 if (oc->oformat->check_bitstream) {
2215 AVPacket pkt = *avpkt;
2216 pkt.stream_index = 0;
2217 ret = oc->oformat->check_bitstream(oc, &pkt);
2219 AVStream *st = s->streams[avpkt->stream_index];
2220 AVStream *ost = oc->streams[0];
2221 st->internal->bsfcs = ost->internal->bsfcs;
2222 st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
2223 ost->internal->bsfcs = NULL;
2224 ost->internal->nb_bsfcs = 0;
2231 #define OFFSET(x) offsetof(DASHContext, x)
2232 #define E AV_OPT_FLAG_ENCODING_PARAM
2233 static const AVOption options[] = {
2234 { "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 },
2235 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
2236 { "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 },
2237 #if FF_API_DASH_MIN_SEG_DURATION
2238 { "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 },
2240 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
2241 { "frag_duration", "fragment duration (in seconds, fractional value can be set)", OFFSET(frag_duration), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2242 { "frag_type", "set type of interval for fragments", OFFSET(frag_type), AV_OPT_TYPE_INT, {.i64 = FRAG_TYPE_NONE }, 0, FRAG_TYPE_NB - 1, E, "frag_type"},
2243 { "none", "one fragment per segment", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_NONE }, 0, UINT_MAX, E, "frag_type"},
2244 { "every_frame", "fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_EVERY_FRAME }, 0, UINT_MAX, E, "frag_type"},
2245 { "duration", "fragment at specific time intervals", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_DURATION }, 0, UINT_MAX, E, "frag_type"},
2246 { "pframes", "fragment at keyframes and following P-Frame reordering (Video only, experimental)", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_PFRAMES }, 0, UINT_MAX, E, "frag_type"},
2247 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2248 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2249 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2250 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2251 { "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 },
2252 { "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 },
2253 { "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 },
2254 { "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 },
2255 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
2256 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
2257 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
2258 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2259 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2260 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
2261 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2262 { "format_options","set list of options for the container format (mp4/webm) used for dash", OFFSET(format_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E},
2263 { "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 },
2264 { "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"},
2265 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
2266 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
2267 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
2268 { "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 },
2269 { "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 },
2270 { "ldash", "Enable Low-latency dash. Constrains the value of a few elements", OFFSET(ldash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2271 { "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},
2272 { "write_prft", "Write producer reference time element", OFFSET(write_prft), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
2273 { "mpd_profile", "Set profiles. Elements and values used in the manifest may be constrained by them", OFFSET(profile), AV_OPT_TYPE_FLAGS, {.i64 = MPD_PROFILE_DASH }, 0, UINT_MAX, E, "mpd_profile"},
2274 { "dash", "MPEG-DASH ISO Base media file format live profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DASH }, 0, UINT_MAX, E, "mpd_profile"},
2275 { "dvb_dash", "DVB-DASH profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DVB }, 0, UINT_MAX, E, "mpd_profile"},
2276 { "http_opts", "HTTP protocol options", OFFSET(http_opts), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
2277 { "target_latency", "Set desired target latency for Low-latency dash", OFFSET(target_latency), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2281 static const AVClass dash_class = {
2282 .class_name = "dash muxer",
2283 .item_name = av_default_item_name,
2285 .version = LIBAVUTIL_VERSION_INT,
2288 AVOutputFormat ff_dash_muxer = {
2290 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
2291 .extensions = "mpd",
2292 .priv_data_size = sizeof(DASHContext),
2293 .audio_codec = AV_CODEC_ID_AAC,
2294 .video_codec = AV_CODEC_ID_H264,
2295 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
2297 .write_header = dash_write_header,
2298 .write_packet = dash_write_packet,
2299 .write_trailer = dash_write_trailer,
2300 .deinit = dash_free,
2301 .check_bitstream = dash_check_bitstream,
2302 .priv_class = &dash_class,