3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "avio_internal.h"
29 #include "avlanguage.h"
35 #include "subtitles.h"
36 #include "vorbiscomment.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/channel_layout.h"
41 #include "libavutil/crc.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/intfloat.h"
44 #include "libavutil/intreadwrite.h"
45 #include "libavutil/lfg.h"
46 #include "libavutil/mastering_display_metadata.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/opt.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/random_seed.h"
51 #include "libavutil/rational.h"
52 #include "libavutil/samplefmt.h"
53 #include "libavutil/sha.h"
54 #include "libavutil/stereo3d.h"
56 #include "libavcodec/xiph.h"
57 #include "libavcodec/mpeg4audio.h"
58 #include "libavcodec/internal.h"
60 /* Level 1 elements we create a SeekHead entry for:
61 * Info, Tracks, Chapters, Attachments, Tags and Cues */
62 #define MAX_SEEKHEAD_ENTRIES 6
64 typedef struct ebml_master {
65 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
66 int sizebytes; ///< how many bytes were reserved for the size
69 typedef struct mkv_seekhead_entry {
74 typedef struct mkv_seekhead {
76 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
81 typedef struct mkv_cuepoint {
85 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
86 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
87 int64_t duration; ///< duration of the block according to time base
90 typedef struct mkv_cues {
91 mkv_cuepoint *entries;
95 typedef struct mkv_track {
99 int64_t sample_rate_offset;
100 int64_t last_timestamp;
102 int64_t duration_offset;
103 int64_t codecpriv_offset;
107 typedef struct mkv_attachment {
112 typedef struct mkv_attachments {
113 mkv_attachment *entries;
117 #define MODE_MATROSKAv2 0x01
118 #define MODE_WEBM 0x02
120 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
121 * range 1 to 126 (inclusive) */
122 #define MAX_TRACKS 126
124 typedef struct MatroskaMuxContext {
125 const AVClass *class;
127 AVIOContext *tags_bc;
129 AVIOContext *info_bc;
131 AVIOContext *tracks_bc;
134 int64_t segment_offset;
135 AVIOContext *cluster_bc;
136 int64_t cluster_pos; ///< file offset of the current cluster
138 int64_t duration_offset;
140 mkv_seekhead seekhead;
143 mkv_attachments *attachments;
145 AVPacket cur_audio_pkt;
147 int have_attachments;
150 int reserve_cues_space;
151 int cluster_size_limit;
153 int64_t cluster_time_limit;
155 int dash_track_number;
159 uint32_t chapter_id_offset;
163 } MatroskaMuxContext;
165 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
166 * 8 byte for "matroska" doctype string */
167 #define MAX_EBML_HEADER_SIZE 35
169 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
170 * offset, 4 bytes for target EBML ID */
171 #define MAX_SEEKENTRY_SIZE 21
173 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
174 #define MAX_CUETRACKPOS_SIZE 40
176 /** Seek preroll value for opus */
177 #define OPUS_SEEK_PREROLL 80000000
179 static int ebml_id_size(uint32_t id)
181 return (av_log2(id) + 7U) / 8;
184 static void put_ebml_id(AVIOContext *pb, uint32_t id)
186 int i = ebml_id_size(id);
188 avio_w8(pb, (uint8_t)(id >> (i * 8)));
192 * Write an EBML size meaning "unknown size".
194 * @param bytes The number of bytes the size should occupy (maximum: 8).
196 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
198 av_assert0(bytes <= 8);
199 avio_w8(pb, 0x1ff >> bytes);
200 ffio_fill(pb, 0xff, bytes - 1);
204 * Calculate how many bytes are needed to represent a given number in EBML.
206 static int ebml_num_size(uint64_t num)
209 while ((num + 1) >> bytes * 7)
215 * Write a number in EBML variable length format.
217 * @param bytes The number of bytes that need to be used to write the number.
218 * If zero, the minimal number of bytes will be used.
220 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
222 int i, needed_bytes = ebml_num_size(num);
224 // sizes larger than this are currently undefined in EBML
225 av_assert0(num < (1ULL << 56) - 1);
228 bytes = needed_bytes;
229 // The bytes needed to write the given size must not exceed
230 // the bytes that we ought to use.
231 av_assert0(bytes >= needed_bytes);
233 num |= 1ULL << bytes * 7;
234 for (i = bytes - 1; i >= 0; i--)
235 avio_w8(pb, (uint8_t)(num >> i * 8));
238 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
245 put_ebml_id(pb, elementid);
246 put_ebml_num(pb, bytes, 0);
247 for (i = bytes - 1; i >= 0; i--)
248 avio_w8(pb, (uint8_t)(val >> i * 8));
251 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
254 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
256 while (tmp>>=8) bytes++;
258 put_ebml_id(pb, elementid);
259 put_ebml_num(pb, bytes, 0);
260 for (i = bytes - 1; i >= 0; i--)
261 avio_w8(pb, (uint8_t)(val >> i * 8));
264 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
266 put_ebml_id(pb, elementid);
267 put_ebml_num(pb, 8, 0);
268 avio_wb64(pb, av_double2int(val));
271 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
272 const void *buf, int size)
274 put_ebml_id(pb, elementid);
275 put_ebml_num(pb, size, 0);
276 avio_write(pb, buf, size);
279 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
282 put_ebml_binary(pb, elementid, str, strlen(str));
286 * Write a void element of a given size. Useful for reserving space in
287 * the file to be written to later.
289 * @param size The number of bytes to reserve, which must be at least 2.
291 static void put_ebml_void(AVIOContext *pb, int size)
293 av_assert0(size >= 2);
295 put_ebml_id(pb, EBML_ID_VOID);
296 // we need to subtract the length needed to store the size from the
297 // size we need to reserve so 2 cases, we use 8 bytes to store the
298 // size if possible, 1 byte otherwise
301 put_ebml_num(pb, size, 0);
304 put_ebml_num(pb, size, 8);
306 ffio_fill(pb, 0, size);
309 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
310 uint64_t expectedsize)
312 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
314 put_ebml_id(pb, elementid);
315 put_ebml_size_unknown(pb, bytes);
316 return (ebml_master) { avio_tell(pb), bytes };
319 static void end_ebml_master(AVIOContext *pb, ebml_master master)
321 int64_t pos = avio_tell(pb);
323 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
325 put_ebml_num(pb, pos - master.pos, master.sizebytes);
326 avio_seek(pb, pos, SEEK_SET);
329 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
333 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
337 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
342 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
343 MatroskaMuxContext *mkv, uint32_t id,
346 uint8_t *buf, crc[4];
350 size = avio_close_dyn_buf(*dyn_cp, &buf);
351 put_ebml_num(pb, size, length_size);
352 if (mkv->write_crc) {
353 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
354 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
355 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
357 avio_write(pb, buf + skip, size - skip);
364 * Complete ebml master without destroying the buffer, allowing for later updates
366 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
367 uint32_t id, int64_t *pos)
370 int size = avio_get_dyn_buf(dyn_cp, &buf);
372 *pos = avio_tell(pb);
375 put_ebml_num(pb, size, 0);
376 avio_write(pb, buf, size);
379 static void put_xiph_size(AVIOContext *pb, int size)
381 ffio_fill(pb, 255, size / 255);
382 avio_w8(pb, size % 255);
386 * Free the members allocated in the mux context.
388 static void mkv_deinit(AVFormatContext *s)
390 MatroskaMuxContext *mkv = s->priv_data;
392 av_packet_unref(&mkv->cur_audio_pkt);
394 ffio_free_dyn_buf(&mkv->cluster_bc);
395 ffio_free_dyn_buf(&mkv->info_bc);
396 ffio_free_dyn_buf(&mkv->tracks_bc);
397 ffio_free_dyn_buf(&mkv->tags_bc);
399 av_freep(&mkv->cues.entries);
400 if (mkv->attachments) {
401 av_freep(&mkv->attachments->entries);
402 av_freep(&mkv->attachments);
404 av_freep(&mkv->tracks);
408 * Initialize the SeekHead element to be ready to index level 1 Matroska
409 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
410 * will be reserved at the current file location.
412 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
414 mkv->seekhead.filepos = avio_tell(pb);
415 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
416 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
417 // that an EBML void element will fit afterwards
418 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
419 put_ebml_void(pb, mkv->seekhead.reserved_size);
422 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
425 mkv_seekhead *seekhead = &mkv->seekhead;
427 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
429 seekhead->entries[seekhead->num_entries].elementid = elementid;
430 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
434 * Write the SeekHead to the file at the location reserved for it
435 * and seek to destpos afterwards. When error_on_seek_failure
436 * is not set, failure to seek to the position designated for the
437 * SeekHead is not considered an error and it is presumed that
438 * destpos is the current position; failure to seek to destpos
439 * afterwards is always an error.
441 * @return 0 on success, < 0 on error.
443 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
444 int error_on_seek_failure, int64_t destpos)
447 mkv_seekhead *seekhead = &mkv->seekhead;
448 int64_t remaining, ret64;
451 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
452 return error_on_seek_failure ? ret64 : 0;
454 ret = start_ebml_master_crc32(&dyn_cp, mkv);
458 for (i = 0; i < seekhead->num_entries; i++) {
459 mkv_seekhead_entry *entry = &seekhead->entries[i];
460 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
463 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
464 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
465 put_ebml_id(dyn_cp, entry->elementid);
467 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
468 end_ebml_master(dyn_cp, seekentry);
470 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0);
472 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
473 put_ebml_void(pb, remaining);
475 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
481 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int tracknum, int64_t ts,
482 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
484 mkv_cues *cues = &mkv->cues;
485 mkv_cuepoint *entries = cues->entries;
490 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
492 return AVERROR(ENOMEM);
493 cues->entries = entries;
495 cues->entries[cues->num_entries].pts = ts;
496 cues->entries[cues->num_entries].stream_idx = stream;
497 cues->entries[cues->num_entries].tracknum = tracknum;
498 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
499 cues->entries[cues->num_entries].relative_pos = relative_pos;
500 cues->entries[cues->num_entries++].duration = duration;
505 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
506 mkv_cues *cues, mkv_track *tracks, int num_tracks)
508 AVIOContext *cuepoint;
511 ret = avio_open_dyn_buf(&cuepoint);
515 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
517 uint64_t pts = entry->pts;
521 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
523 // put all the entries from different tracks that have the exact same
524 // timestamp into the same CuePoint
525 for (int j = 0; j < num_tracks; j++)
526 tracks[j].has_cue = 0;
528 ebml_master track_positions;
529 int idx = entry->stream_idx;
531 av_assert0(idx >= 0 && idx < num_tracks);
532 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
534 tracks[idx].has_cue = 1;
535 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
536 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , entry->tracknum );
537 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
538 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
539 if (entry->duration != -1)
540 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
541 end_ebml_master(cuepoint, track_positions);
542 } while (++entry < end && entry->pts == pts);
543 size = avio_get_dyn_buf(cuepoint, &buf);
544 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
545 ffio_reset_dyn_buf(cuepoint);
547 ffio_free_dyn_buf(&cuepoint);
552 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
554 const uint8_t *header_start[3];
556 int first_header_size;
559 if (par->codec_id == AV_CODEC_ID_VORBIS)
560 first_header_size = 30;
562 first_header_size = 42;
564 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
565 first_header_size, header_start, header_len) < 0) {
566 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
570 avio_w8(pb, 2); // number packets - 1
571 for (j = 0; j < 2; j++) {
572 put_xiph_size(pb, header_len[j]);
574 for (j = 0; j < 3; j++)
575 avio_write(pb, header_start[j], header_len[j]);
580 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
582 if (par->extradata && par->extradata_size == 2)
583 avio_write(pb, par->extradata, 2);
585 avio_wl16(pb, 0x410); // fallback to the most recent version
589 static int put_flac_codecpriv(AVFormatContext *s,
590 AVIOContext *pb, AVCodecParameters *par)
592 int write_comment = (par->channel_layout &&
593 !(par->channel_layout & ~0x3ffffULL) &&
594 !ff_flac_is_native_layout(par->channel_layout));
595 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
602 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
603 "Lavf" : LIBAVFORMAT_IDENT;
604 AVDictionary *dict = NULL;
605 uint8_t buf[32], *data, *p;
608 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
609 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
611 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
612 if (len >= ((1<<24) - 4)) {
614 return AVERROR(EINVAL);
617 data = av_malloc(len + 4);
620 return AVERROR(ENOMEM);
624 AV_WB24(data + 1, len);
627 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
629 avio_write(pb, data, len + 4);
638 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
639 int *sample_rate, int *output_sample_rate)
641 MPEG4AudioConfig mp4ac;
644 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
645 /* Don't abort if the failure is because of missing extradata. Assume in that
646 * case a bitstream filter will provide the muxer with the extradata in the
648 * Abort however if s->pb is not seekable, as we would not be able to seek back
649 * to write the sample rate elements once the extradata shows up, anyway. */
650 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
651 av_log(s, AV_LOG_ERROR,
652 "Error parsing AAC extradata, unable to determine samplerate.\n");
653 return AVERROR(EINVAL);
657 /* This will only happen when this function is called while writing the
658 * header and no extradata is available. The space for this element has
659 * to be reserved for when this function is called again after the
660 * extradata shows up in the first packet, as there's no way to know if
661 * output_sample_rate will be different than sample_rate or not. */
662 *output_sample_rate = *sample_rate;
664 *sample_rate = mp4ac.sample_rate;
665 *output_sample_rate = mp4ac.ext_sample_rate;
670 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
671 AVCodecParameters *par,
674 switch (par->codec_id) {
675 case AV_CODEC_ID_VORBIS:
676 case AV_CODEC_ID_THEORA:
677 return put_xiph_codecpriv(s, dyn_cp, par);
678 case AV_CODEC_ID_FLAC:
679 return put_flac_codecpriv(s, dyn_cp, par);
680 case AV_CODEC_ID_WAVPACK:
681 return put_wv_codecpriv(dyn_cp, par);
682 case AV_CODEC_ID_H264:
683 return ff_isom_write_avcc(dyn_cp, par->extradata,
684 par->extradata_size);
685 case AV_CODEC_ID_HEVC:
686 return ff_isom_write_hvcc(dyn_cp, par->extradata,
687 par->extradata_size, 0);
688 case AV_CODEC_ID_AV1:
689 if (par->extradata_size)
690 return ff_isom_write_av1c(dyn_cp, par->extradata,
691 par->extradata_size);
693 put_ebml_void(pb, 4 + 3);
695 case AV_CODEC_ID_ALAC:
696 if (par->extradata_size < 36) {
697 av_log(s, AV_LOG_ERROR,
698 "Invalid extradata found, ALAC expects a 36-byte "
700 return AVERROR_INVALIDDATA;
702 avio_write(dyn_cp, par->extradata + 12,
703 par->extradata_size - 12);
705 case AV_CODEC_ID_AAC:
706 if (par->extradata_size)
707 avio_write(dyn_cp, par->extradata, par->extradata_size);
709 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
712 if (par->codec_id == AV_CODEC_ID_PRORES &&
713 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
714 avio_wl32(dyn_cp, par->codec_tag);
715 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
716 avio_write(dyn_cp, par->extradata, par->extradata_size);
722 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
723 AVCodecParameters *par,
724 int native_id, int qt_id)
728 int ret, codecpriv_size;
730 ret = avio_open_dyn_buf(&dyn_cp);
735 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
736 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
739 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
741 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
742 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
745 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
746 avio_wl32(dyn_cp, par->codec_tag);
747 for(i = 0; i < 0x5a - 8; i++)
750 avio_write(dyn_cp, par->extradata, par->extradata_size);
752 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
753 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
754 avcodec_get_name(par->codec_id));
757 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
759 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
760 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
761 avcodec_get_name(par->codec_id));
762 ret = AVERROR(EINVAL);
765 ff_put_bmp_header(dyn_cp, par, 0, 0);
767 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
769 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
771 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
772 avcodec_get_name(par->codec_id));
773 ret = AVERROR(EINVAL);
776 par->codec_tag = tag;
778 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
781 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
783 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
785 ffio_free_dyn_buf(&dyn_cp);
789 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
791 uint8_t *colorinfo_ptr;
792 int side_data_size = 0;
793 int ret, colorinfo_size;
794 const uint8_t *side_data;
796 ret = avio_open_dyn_buf(&dyn_cp);
800 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
801 par->color_trc < AVCOL_TRC_NB) {
802 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
805 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
806 par->color_space < AVCOL_SPC_NB) {
807 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
809 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
810 par->color_primaries < AVCOL_PRI_NB) {
811 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
813 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
814 par->color_range < AVCOL_RANGE_NB) {
815 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
817 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
818 par->chroma_location <= AVCHROMA_LOC_TOP) {
821 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
822 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
823 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
826 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
828 if (side_data_size) {
829 const AVContentLightMetadata *metadata =
830 (const AVContentLightMetadata*)side_data;
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
832 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
835 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
837 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
838 ebml_master meta_element = start_ebml_master(
839 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
840 const AVMasteringDisplayMetadata *metadata =
841 (const AVMasteringDisplayMetadata*)side_data;
842 if (metadata->has_primaries) {
843 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
844 av_q2d(metadata->display_primaries[0][0]));
845 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
846 av_q2d(metadata->display_primaries[0][1]));
847 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
848 av_q2d(metadata->display_primaries[1][0]));
849 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
850 av_q2d(metadata->display_primaries[1][1]));
851 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
852 av_q2d(metadata->display_primaries[2][0]));
853 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
854 av_q2d(metadata->display_primaries[2][1]));
855 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
856 av_q2d(metadata->white_point[0]));
857 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
858 av_q2d(metadata->white_point[1]));
860 if (metadata->has_luminance) {
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
862 av_q2d(metadata->max_luminance));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
864 av_q2d(metadata->min_luminance));
866 end_ebml_master(dyn_cp, meta_element);
869 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
870 if (colorinfo_size) {
871 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
872 avio_write(pb, colorinfo_ptr, colorinfo_size);
873 end_ebml_master(pb, colorinfo);
875 ffio_free_dyn_buf(&dyn_cp);
879 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
882 ebml_master projection;
883 int side_data_size = 0;
886 const AVSphericalMapping *spherical =
887 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
893 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
894 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
895 spherical->projection != AV_SPHERICAL_CUBEMAP) {
896 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
900 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
901 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
902 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
903 4 * (2 + 1 + 8) + (2 + 1 + 20));
905 switch (spherical->projection) {
906 case AV_SPHERICAL_EQUIRECTANGULAR:
907 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
908 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
910 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
911 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
912 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
913 AV_WB32(private, 0); // version + flags
914 AV_WB32(private + 4, spherical->bound_top);
915 AV_WB32(private + 8, spherical->bound_bottom);
916 AV_WB32(private + 12, spherical->bound_left);
917 AV_WB32(private + 16, spherical->bound_right);
918 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
921 case AV_SPHERICAL_CUBEMAP:
922 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
923 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
924 AV_WB32(private, 0); // version + flags
925 AV_WB32(private + 4, 0); // layout
926 AV_WB32(private + 8, spherical->padding);
927 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
935 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
936 (double) spherical->yaw / (1 << 16));
937 if (spherical->pitch)
938 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
939 (double) spherical->pitch / (1 << 16));
941 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
942 (double) spherical->roll / (1 << 16));
944 end_ebml_master(pb, projection);
949 static void mkv_write_field_order(AVIOContext *pb, int mode,
950 enum AVFieldOrder field_order)
952 switch (field_order) {
953 case AV_FIELD_UNKNOWN:
955 case AV_FIELD_PROGRESSIVE:
956 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
957 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
963 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
964 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
965 if (mode != MODE_WEBM) {
966 switch (field_order) {
968 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
969 MATROSKA_VIDEO_FIELDORDER_TT);
972 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
973 MATROSKA_VIDEO_FIELDORDER_BB);
976 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
977 MATROSKA_VIDEO_FIELDORDER_TB);
980 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
981 MATROSKA_VIDEO_FIELDORDER_BT);
988 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
989 AVStream *st, int mode, int *h_width, int *h_height)
993 AVDictionaryEntry *tag;
994 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
998 // convert metadata into proper side data and add it to the stream
999 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1000 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1001 int stereo_mode = atoi(tag->value);
1003 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1004 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1009 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1010 stereo_mode != 10 && stereo_mode != 12) {
1011 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1017 // iterate to find the stereo3d side data
1018 for (i = 0; i < st->nb_side_data; i++) {
1019 AVPacketSideData sd = st->side_data[i];
1020 if (sd.type == AV_PKT_DATA_STEREO3D) {
1021 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1023 switch (stereo->type) {
1024 case AV_STEREO3D_2D:
1025 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1027 case AV_STEREO3D_SIDEBYSIDE:
1028 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1029 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1030 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1033 case AV_STEREO3D_TOPBOTTOM:
1034 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1035 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1039 case AV_STEREO3D_CHECKERBOARD:
1040 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1041 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1044 case AV_STEREO3D_LINES:
1045 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1046 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1050 case AV_STEREO3D_COLUMNS:
1051 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1052 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1056 case AV_STEREO3D_FRAMESEQUENCE:
1057 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1058 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1066 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1069 // if webm, do not write unsupported modes
1070 if ((mode == MODE_WEBM &&
1071 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1072 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1073 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1074 av_log(s, AV_LOG_ERROR,
1075 "The specified stereo mode is not valid.\n");
1076 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1077 return AVERROR(EINVAL);
1080 // write StereoMode if format is valid
1081 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1086 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1087 int i, AVIOContext *pb, int default_stream_exists)
1089 AVStream *st = s->streams[i];
1090 AVCodecParameters *par = st->codecpar;
1091 ebml_master subinfo, track;
1094 int bit_depth = av_get_bits_per_sample(par->codec_id);
1095 int sample_rate = par->sample_rate;
1096 int output_sample_rate = 0;
1097 int display_width_div = 1;
1098 int display_height_div = 1;
1100 AVDictionaryEntry *tag;
1102 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1103 mkv->have_attachments = 1;
1107 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1108 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1109 if (par->bits_per_raw_sample)
1110 bit_depth = par->bits_per_raw_sample;
1112 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1115 bit_depth = par->bits_per_coded_sample;
1118 if (par->codec_id == AV_CODEC_ID_AAC) {
1119 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1120 &output_sample_rate);
1125 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1126 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1127 mkv->is_dash ? mkv->dash_track_number : i + 1);
1128 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1129 mkv->is_dash ? mkv->dash_track_number : i + 1);
1130 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1132 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1133 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1134 tag = av_dict_get(st->metadata, "language", NULL, 0);
1135 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1136 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1137 } else if (tag && tag->value) {
1138 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1141 // The default value for TRACKFLAGDEFAULT is 1, so add element
1142 // if we need to clear it.
1143 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1144 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1146 if (st->disposition & AV_DISPOSITION_FORCED)
1147 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1149 if (mkv->mode == MODE_WEBM) {
1150 const char *codec_id;
1151 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1152 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1153 if (ff_webm_codec_tags[j].id == par->codec_id) {
1154 codec_id = ff_webm_codec_tags[j].str;
1159 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1160 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1161 codec_id = "D_WEBVTT/CAPTIONS";
1162 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1163 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1164 codec_id = "D_WEBVTT/DESCRIPTIONS";
1165 native_id = MATROSKA_TRACK_TYPE_METADATA;
1166 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1167 codec_id = "D_WEBVTT/METADATA";
1168 native_id = MATROSKA_TRACK_TYPE_METADATA;
1170 codec_id = "D_WEBVTT/SUBTITLES";
1171 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1176 av_log(s, AV_LOG_ERROR,
1177 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1178 return AVERROR(EINVAL);
1181 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1183 // look for a codec ID string specific to mkv to use,
1184 // if none are found, use AVI codes
1185 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1186 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1187 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1188 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1194 if (mkv->allow_raw_vfw) {
1197 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1198 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1199 return AVERROR(EINVAL);
1204 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1205 int64_t codecdelay = av_rescale_q(par->initial_padding,
1206 (AVRational){ 1, 48000 },
1207 (AVRational){ 1, 1000000000 });
1208 if (codecdelay < 0) {
1209 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1210 return AVERROR(EINVAL);
1212 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1213 // (AVRational){ 1, par->sample_rate },
1216 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1218 if (par->codec_id == AV_CODEC_ID_OPUS) {
1219 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1222 switch (par->codec_type) {
1223 case AVMEDIA_TYPE_VIDEO:
1224 mkv->have_video = 1;
1225 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1227 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1228 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1229 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1230 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1231 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1232 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1235 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1236 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1237 par->codec_id == AV_CODEC_ID_SVQ1 ||
1238 par->codec_id == AV_CODEC_ID_SVQ3 ||
1239 par->codec_id == AV_CODEC_ID_CINEPAK))
1243 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1244 else if (!native_id) {
1245 // if there is no mkv-specific codec ID, use VFW mode
1246 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1247 mkv->tracks[i].write_dts = 1;
1248 s->internal->avoid_negative_ts_use_pts = 0;
1251 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1253 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1254 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1256 mkv_write_field_order(pb, mkv->mode, par->field_order);
1258 // check both side data and metadata for stereo information,
1259 // write the result to the bitstream if any is found
1260 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1262 &display_height_div);
1266 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1267 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1268 (par->format == AV_PIX_FMT_YUVA420P)) {
1269 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1272 // write DisplayWidth and DisplayHeight, they contain the size of
1273 // a single source view and/or the display aspect ratio
1274 if (st->sample_aspect_ratio.num) {
1275 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1276 if (d_width > INT_MAX) {
1277 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1278 return AVERROR(EINVAL);
1280 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1281 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1282 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1283 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1285 AVRational display_aspect_ratio;
1286 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1287 par->width * (int64_t)st->sample_aspect_ratio.num,
1288 par->height * (int64_t)st->sample_aspect_ratio.den,
1290 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1291 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1292 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1295 } else if (display_width_div != 1 || display_height_div != 1) {
1296 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1297 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1298 } else if (mkv->mode != MODE_WEBM)
1299 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1301 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1302 uint32_t color_space = av_le2ne32(par->codec_tag);
1303 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1305 ret = mkv_write_video_color(pb, par, st);
1308 ret = mkv_write_video_projection(s, pb, st);
1311 end_ebml_master(pb, subinfo);
1314 case AVMEDIA_TYPE_AUDIO:
1315 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1318 // no mkv-specific ID, use ACM mode
1319 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1321 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1322 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1324 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1325 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1326 if (output_sample_rate)
1327 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1329 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1330 end_ebml_master(pb, subinfo);
1333 case AVMEDIA_TYPE_SUBTITLE:
1335 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1336 return AVERROR(ENOSYS);
1339 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1340 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1342 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1345 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1346 return AVERROR(EINVAL);
1349 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1350 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1351 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1356 end_ebml_master(pb, track);
1361 static int mkv_write_tracks(AVFormatContext *s)
1363 MatroskaMuxContext *mkv = s->priv_data;
1364 AVIOContext *pb = s->pb;
1365 int i, ret, default_stream_exists = 0;
1367 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1369 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1373 for (i = 0; i < s->nb_streams; i++) {
1374 AVStream *st = s->streams[i];
1375 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1377 for (i = 0; i < s->nb_streams; i++) {
1378 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1383 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1384 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1385 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1387 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0);
1392 static int mkv_write_chapters(AVFormatContext *s)
1394 MatroskaMuxContext *mkv = s->priv_data;
1395 AVIOContext *dyn_cp, *pb = s->pb;
1396 ebml_master editionentry;
1397 AVRational scale = {1, 1E9};
1400 if (!s->nb_chapters || mkv->wrote_chapters)
1403 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1405 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1406 if (ret < 0) return ret;
1408 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1409 if (mkv->mode != MODE_WEBM) {
1410 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1411 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1413 for (i = 0; i < s->nb_chapters; i++) {
1414 ebml_master chapteratom, chapterdisplay;
1415 AVChapter *c = s->chapters[i];
1416 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1417 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1418 AVDictionaryEntry *t = NULL;
1419 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1420 av_log(s, AV_LOG_ERROR,
1421 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1422 chapterstart, chapterend);
1423 return AVERROR_INVALIDDATA;
1426 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1427 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1428 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1429 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1430 if (mkv->mode != MODE_WEBM) {
1431 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1432 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1434 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1435 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1436 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1437 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1438 end_ebml_master(dyn_cp, chapterdisplay);
1440 end_ebml_master(dyn_cp, chapteratom);
1442 end_ebml_master(dyn_cp, editionentry);
1443 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0);
1445 mkv->wrote_chapters = 1;
1449 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1451 uint8_t *key = av_strdup(t->key);
1453 const uint8_t *lang = NULL;
1457 return AVERROR(ENOMEM);
1459 if ((p = strrchr(p, '-')) &&
1460 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1467 else if (*p >= 'a' && *p <= 'z')
1472 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1473 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1475 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1476 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1477 end_ebml_master(pb, tag);
1483 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1484 unsigned int uid, ebml_master *tag)
1487 MatroskaMuxContext *mkv = s->priv_data;
1488 ebml_master targets;
1491 if (!mkv->tags_bc) {
1492 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1494 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1500 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1501 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1503 put_ebml_uint(pb, elementid, uid);
1504 end_ebml_master(pb, targets);
1508 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1510 return av_strcasecmp(name, "title") &&
1511 av_strcasecmp(name, "stereo_mode") &&
1512 av_strcasecmp(name, "creation_time") &&
1513 av_strcasecmp(name, "encoding_tool") &&
1514 av_strcasecmp(name, "duration") &&
1515 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1516 av_strcasecmp(name, "language")) &&
1517 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1518 (av_strcasecmp(name, "filename") &&
1519 av_strcasecmp(name, "mimetype")));
1522 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1525 MatroskaMuxContext *mkv = s->priv_data;
1528 AVDictionaryEntry *t = NULL;
1530 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1534 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1535 if (mkv_check_tag_name(t->key, elementid)) {
1536 ret = mkv_write_simpletag(mkv->tags_bc, t);
1542 end_ebml_master(mkv->tags_bc, tag);
1546 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1548 AVDictionaryEntry *t = NULL;
1550 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1551 if (mkv_check_tag_name(t->key, elementid))
1557 static int mkv_write_tags(AVFormatContext *s)
1559 MatroskaMuxContext *mkv = s->priv_data;
1562 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1564 if (mkv_check_tag(s->metadata, 0)) {
1565 ret = mkv_write_tag(s, s->metadata, 0, 0);
1566 if (ret < 0) return ret;
1569 for (i = 0; i < s->nb_streams; i++) {
1570 AVStream *st = s->streams[i];
1572 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1575 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1578 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1579 if (ret < 0) return ret;
1582 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1583 for (i = 0; i < s->nb_streams; i++) {
1585 AVStream *st = s->streams[i];
1586 ebml_master tag_target;
1589 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1592 ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
1593 i + 1, &tag_target);
1598 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1599 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1600 mkv->tracks[i].duration_offset = avio_tell(pb);
1602 // Reserve space to write duration as a 20-byte string.
1603 // 2 (ebml id) + 1 (data size) + 20 (data)
1604 put_ebml_void(pb, 23);
1605 end_ebml_master(pb, tag);
1606 end_ebml_master(pb, tag_target);
1610 if (mkv->mode != MODE_WEBM) {
1611 for (i = 0; i < s->nb_chapters; i++) {
1612 AVChapter *ch = s->chapters[i];
1614 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1617 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1623 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1624 for (i = 0; i < mkv->attachments->num_entries; i++) {
1625 mkv_attachment *attachment = &mkv->attachments->entries[i];
1626 AVStream *st = s->streams[attachment->stream_idx];
1628 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1631 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1638 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1639 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1640 MATROSKA_ID_TAGS, &mkv->tags_pos);
1642 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0);
1647 static int mkv_write_attachments(AVFormatContext *s)
1649 MatroskaMuxContext *mkv = s->priv_data;
1650 AVIOContext *dyn_cp, *pb = s->pb;
1654 if (!mkv->have_attachments)
1657 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1658 if (!mkv->attachments)
1659 return AVERROR(ENOMEM);
1661 av_lfg_init(&c, av_get_random_seed());
1663 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1665 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1666 if (ret < 0) return ret;
1668 for (i = 0; i < s->nb_streams; i++) {
1669 AVStream *st = s->streams[i];
1670 ebml_master attached_file;
1671 mkv_attachment *attachment = mkv->attachments->entries;
1672 AVDictionaryEntry *t;
1673 const char *mimetype = NULL;
1676 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1679 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1681 return AVERROR(ENOMEM);
1682 mkv->attachments->entries = attachment;
1684 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1686 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1687 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1688 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1689 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1690 return AVERROR(EINVAL);
1692 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1693 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1694 mimetype = t->value;
1695 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1697 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1698 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1699 mimetype = ff_mkv_mime_tags[i].str;
1702 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1703 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1704 mimetype = ff_mkv_image_mime_tags[i].str;
1709 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1710 "it cannot be deduced from the codec id.\n", i);
1711 return AVERROR(EINVAL);
1714 if (s->flags & AVFMT_FLAG_BITEXACT) {
1715 struct AVSHA *sha = av_sha_alloc();
1718 return AVERROR(ENOMEM);
1719 av_sha_init(sha, 160);
1720 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1721 av_sha_final(sha, digest);
1723 fileuid = AV_RL32(digest);
1725 fileuid = av_lfg_get(&c);
1727 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1728 fileuid, mkv->attachments->num_entries);
1730 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1731 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1732 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1733 end_ebml_master(dyn_cp, attached_file);
1735 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1736 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1738 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0);
1743 static int64_t get_metadata_duration(AVFormatContext *s)
1749 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1750 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1751 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1755 for (i = 0; i < s->nb_streams; i++) {
1757 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1759 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1760 max = FFMAX(max, us);
1763 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1767 static int mkv_write_header(AVFormatContext *s)
1769 MatroskaMuxContext *mkv = s->priv_data;
1770 AVIOContext *pb = s->pb;
1771 ebml_master ebml_header;
1772 AVDictionaryEntry *tag;
1773 int ret, i, version = 2;
1774 int64_t creation_time;
1776 if (!strcmp(s->oformat->name, "webm")) {
1777 mkv->mode = MODE_WEBM;
1780 mkv->mode = MODE_MATROSKAv2;
1782 if (mkv->mode != MODE_WEBM ||
1783 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1784 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1787 for (i = 0; i < s->nb_streams; i++) {
1788 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1789 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1790 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1794 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1796 return AVERROR(ENOMEM);
1798 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1799 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1800 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1801 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1802 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1803 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1804 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1805 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1806 end_ebml_master(pb, ebml_header);
1808 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1809 mkv->segment_offset = avio_tell(pb);
1811 // we write a seek head at the beginning to point to all other level
1812 // one elements (except Clusters).
1813 mkv_start_seekhead(mkv, pb);
1815 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1817 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1822 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1823 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1824 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1825 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1826 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1827 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1828 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1830 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1832 if (mkv->mode != MODE_WEBM) {
1833 uint32_t segment_uid[4];
1836 av_lfg_init(&lfg, av_get_random_seed());
1838 for (i = 0; i < 4; i++)
1839 segment_uid[i] = av_lfg_get(&lfg);
1841 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1844 const char *ident = "Lavf";
1845 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1846 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1849 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1850 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1851 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1852 uint8_t date_utc_buf[8];
1853 AV_WB64(date_utc_buf, date_utc);
1854 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1857 // reserve space for the duration
1859 mkv->duration_offset = avio_tell(pb);
1860 if (!mkv->is_live) {
1861 int64_t metadata_duration = get_metadata_duration(s);
1863 if (s->duration > 0) {
1864 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1865 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1866 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1867 } else if (metadata_duration > 0) {
1868 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1869 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1870 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1872 put_ebml_void(pb, 11); // assumes double-precision float to be written
1875 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1876 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1877 MATROSKA_ID_INFO, &mkv->info_pos);
1879 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0);
1882 ret = mkv_write_tracks(s);
1886 for (i = 0; i < s->nb_chapters; i++)
1887 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1889 ret = mkv_write_chapters(s);
1893 if (mkv->mode != MODE_WEBM) {
1894 ret = mkv_write_attachments(s);
1899 ret = mkv_write_tags(s);
1903 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1904 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1909 if (s->metadata_header_padding > 0) {
1910 if (s->metadata_header_padding == 1)
1911 s->metadata_header_padding++;
1912 put_ebml_void(pb, s->metadata_header_padding);
1915 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1916 mkv->cues_pos = avio_tell(pb);
1917 if (mkv->reserve_cues_space == 1)
1918 mkv->reserve_cues_space++;
1919 put_ebml_void(pb, mkv->reserve_cues_space);
1922 av_init_packet(&mkv->cur_audio_pkt);
1923 mkv->cur_audio_pkt.size = 0;
1924 mkv->cluster_pos = -1;
1926 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1927 // after 4k and on a keyframe
1928 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1929 if (mkv->cluster_time_limit < 0)
1930 mkv->cluster_time_limit = 5000;
1931 if (mkv->cluster_size_limit < 0)
1932 mkv->cluster_size_limit = 5 * 1024 * 1024;
1934 if (mkv->cluster_time_limit < 0)
1935 mkv->cluster_time_limit = 1000;
1936 if (mkv->cluster_size_limit < 0)
1937 mkv->cluster_size_limit = 32 * 1024;
1943 static int mkv_blockgroup_size(int pkt_size)
1945 int size = pkt_size + 4;
1946 size += ebml_num_size(size);
1947 size += 2; // EBML ID for block and block duration
1948 size += 9; // max size of block duration incl. length field
1952 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1959 dst = av_malloc(srclen);
1961 return AVERROR(ENOMEM);
1963 while (srclen >= WV_HEADER_SIZE) {
1966 ret = ff_wv_parse_header(&header, src);
1969 src += WV_HEADER_SIZE;
1970 srclen -= WV_HEADER_SIZE;
1972 if (srclen < header.blocksize) {
1973 ret = AVERROR_INVALIDDATA;
1977 if (header.initial) {
1978 AV_WL32(dst + offset, header.samples);
1981 AV_WL32(dst + offset, header.flags);
1982 AV_WL32(dst + offset + 4, header.crc);
1985 if (!(header.initial && header.final)) {
1986 AV_WL32(dst + offset, header.blocksize);
1990 memcpy(dst + offset, src, header.blocksize);
1991 src += header.blocksize;
1992 srclen -= header.blocksize;
1993 offset += header.blocksize;
2005 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2006 uint32_t blockid, AVPacket *pkt, int keyframe)
2008 MatroskaMuxContext *mkv = s->priv_data;
2009 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2010 mkv_track *track = &mkv->tracks[pkt->stream_index];
2011 uint8_t *data = NULL, *side_data = NULL;
2012 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2013 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2014 uint64_t additional_id = 0;
2015 int64_t discard_padding = 0;
2016 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2017 ebml_master block_group, block_additions, block_more;
2019 ts += track->ts_offset;
2021 /* The following string is identical to the one in mkv_write_vtt_blocks
2022 * so that only one copy needs to exist in binaries. */
2023 av_log(s, AV_LOG_DEBUG,
2024 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2025 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2026 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2027 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2028 mkv->cluster_pos, track_number, keyframe != 0);
2030 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2031 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2032 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2033 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2034 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2035 /* extradata is Annex B, assume the bitstream is too and convert it */
2036 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2037 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2038 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2039 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2040 err = mkv_strip_wavpack(pkt->data, &data, &size);
2045 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2046 "a packet from stream %d.\n", pkt->stream_index);
2050 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2051 /* Matroska specification requires to remove the first QuickTime atom
2057 side_data = av_packet_get_side_data(pkt,
2058 AV_PKT_DATA_SKIP_SAMPLES,
2060 if (side_data && side_data_size >= 10) {
2061 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2062 (AVRational){1, par->sample_rate},
2063 (AVRational){1, 1000000000});
2066 side_data = av_packet_get_side_data(pkt,
2067 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2070 if (side_data_size < 8) {
2073 additional_id = AV_RB64(side_data);
2075 side_data_size -= 8;
2079 if ((side_data_size && additional_id == 1) || discard_padding) {
2080 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2081 blockid = MATROSKA_ID_BLOCK;
2084 put_ebml_id(pb, blockid);
2085 put_ebml_num(pb, size + 4, 0);
2086 // this assumes stream_index is less than 126
2087 avio_w8(pb, 0x80 | track_number);
2088 avio_wb16(pb, ts - mkv->cluster_pts);
2089 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2090 avio_write(pb, data + offset, size);
2091 if (data != pkt->data)
2094 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2095 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2097 track->last_timestamp = ts;
2099 if (discard_padding) {
2100 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2103 if (side_data_size && additional_id == 1) {
2104 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2105 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2106 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2107 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2108 put_ebml_num(pb, side_data_size, 0);
2109 avio_write(pb, side_data, side_data_size);
2110 end_ebml_master(pb, block_more);
2111 end_ebml_master(pb, block_additions);
2113 if ((side_data_size && additional_id == 1) || discard_padding) {
2114 end_ebml_master(pb, block_group);
2120 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2122 MatroskaMuxContext *mkv = s->priv_data;
2123 ebml_master blockgroup;
2124 int id_size, settings_size, size;
2125 uint8_t *id, *settings;
2126 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2127 const int flags = 0;
2130 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2134 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2137 size = id_size + 1 + settings_size + 1 + pkt->size;
2139 /* The following string is identical to the one in mkv_write_block so that
2140 * only one copy needs to exist in binaries. */
2141 av_log(s, AV_LOG_DEBUG,
2142 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2143 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2144 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2145 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2146 mkv->cluster_pos, pkt->stream_index + 1, 1);
2148 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2150 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2151 put_ebml_num(pb, size + 4, 0);
2152 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2153 avio_wb16(pb, ts - mkv->cluster_pts);
2155 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2157 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2158 end_ebml_master(pb, blockgroup);
2160 return pkt->duration;
2163 static void mkv_end_cluster(AVFormatContext *s)
2165 MatroskaMuxContext *mkv = s->priv_data;
2167 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0);
2168 mkv->cluster_pos = -1;
2169 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2172 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2174 MatroskaMuxContext *mkv = s->priv_data;
2175 mkv_track *track = &mkv->tracks[pkt->stream_index];
2176 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2178 int side_data_size = 0, ret;
2180 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2183 switch (par->codec_id) {
2184 case AV_CODEC_ID_AAC:
2185 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2186 int filler, output_sample_rate = 0;
2188 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2189 &output_sample_rate);
2192 if (!output_sample_rate)
2193 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2194 ret = ff_alloc_extradata(par, side_data_size);
2197 memcpy(par->extradata, side_data, side_data_size);
2198 curpos = avio_tell(mkv->tracks_bc);
2199 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2200 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2201 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2203 put_ebml_void(mkv->tracks_bc, filler);
2204 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2205 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2206 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2207 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2208 } else if (!par->extradata_size && !track->sample_rate) {
2209 // No extradata (codecpar or packet side data).
2210 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2211 return AVERROR(EINVAL);
2214 case AV_CODEC_ID_FLAC:
2215 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2216 AVCodecParameters *codecpriv_par;
2218 if (side_data_size != par->extradata_size) {
2219 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2221 return AVERROR(EINVAL);
2223 codecpriv_par = avcodec_parameters_alloc();
2225 return AVERROR(ENOMEM);
2226 ret = avcodec_parameters_copy(codecpriv_par, par);
2228 avcodec_parameters_free(&codecpriv_par);
2231 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2232 curpos = avio_tell(mkv->tracks_bc);
2233 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2234 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2235 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2236 avcodec_parameters_free(&codecpriv_par);
2239 // FIXME: Remove the following once libaom starts propagating extradata during init()
2240 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2241 case AV_CODEC_ID_AV1:
2242 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2243 !par->extradata_size) {
2244 AVIOContext *dyn_cp;
2248 ret = avio_open_dyn_buf(&dyn_cp);
2251 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2252 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2253 if (!codecpriv_size) {
2255 return AVERROR_INVALIDDATA;
2257 curpos = avio_tell(mkv->tracks_bc);
2258 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2259 // Do not write the OBUs as we don't have space saved for them
2260 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2262 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2263 ret = ff_alloc_extradata(par, side_data_size);
2266 memcpy(par->extradata, side_data, side_data_size);
2267 } else if (!par->extradata_size)
2268 return AVERROR_INVALIDDATA;
2272 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2279 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2281 MatroskaMuxContext *mkv = s->priv_data;
2283 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2284 mkv_track *track = &mkv->tracks[pkt->stream_index];
2285 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2286 int duration = pkt->duration;
2288 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2289 int64_t relative_packet_pos;
2290 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2292 if (ts == AV_NOPTS_VALUE) {
2293 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2294 return AVERROR(EINVAL);
2296 ts += track->ts_offset;
2298 if (mkv->cluster_pos != -1) {
2299 int64_t cluster_time = ts - mkv->cluster_pts;
2300 if ((int16_t)cluster_time != cluster_time) {
2302 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2306 if (mkv->cluster_pos == -1) {
2307 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2310 mkv->cluster_pos = avio_tell(s->pb);
2311 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2312 mkv->cluster_pts = FFMAX(0, ts);
2313 av_log(s, AV_LOG_DEBUG,
2314 "Starting new cluster with timestamp "
2315 "%" PRId64 " at offset %" PRId64 " bytes\n",
2316 mkv->cluster_pts, mkv->cluster_pos);
2318 pb = mkv->cluster_bc;
2320 relative_packet_pos = avio_tell(pb);
2322 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2323 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2326 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2327 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2328 mkv->cluster_pos, relative_packet_pos, -1);
2329 if (ret < 0) return ret;
2332 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2333 duration = mkv_write_vtt_blocks(s, pb, pkt);
2335 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2336 mkv_blockgroup_size(pkt->size));
2338 #if FF_API_CONVERGENCE_DURATION
2339 FF_DISABLE_DEPRECATION_WARNINGS
2340 /* For backward compatibility, prefer convergence_duration. */
2341 if (pkt->convergence_duration > 0) {
2342 duration = pkt->convergence_duration;
2344 FF_ENABLE_DEPRECATION_WARNINGS
2346 /* All subtitle blocks are considered to be keyframes. */
2347 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2348 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2349 end_ebml_master(pb, blockgroup);
2352 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2353 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2354 mkv->cluster_pos, relative_packet_pos, duration);
2360 mkv->duration = FFMAX(mkv->duration, ts + duration);
2361 track->duration = FFMAX(track->duration, ts + duration);
2366 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2368 MatroskaMuxContext *mkv = s->priv_data;
2369 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2370 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2372 int64_t cluster_time;
2374 int start_new_cluster;
2376 ret = mkv_check_new_extra_data(s, pkt);
2380 if (mkv->tracks[pkt->stream_index].write_dts)
2381 cluster_time = pkt->dts - mkv->cluster_pts;
2383 cluster_time = pkt->pts - mkv->cluster_pts;
2384 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2386 cluster_size = avio_tell(mkv->cluster_bc);
2388 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2389 // WebM DASH specification states that the first block of every cluster
2390 // has to be a key frame. So for DASH video, we only create a cluster
2391 // on seeing key frames.
2392 start_new_cluster = keyframe;
2393 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2394 (mkv->cluster_pos == -1 ||
2395 cluster_time > mkv->cluster_time_limit)) {
2396 // For DASH audio, we create a Cluster based on cluster_time_limit
2397 start_new_cluster = 1;
2398 } else if (!mkv->is_dash &&
2399 (cluster_size > mkv->cluster_size_limit ||
2400 cluster_time > mkv->cluster_time_limit ||
2401 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2402 cluster_size > 4 * 1024))) {
2403 start_new_cluster = 1;
2405 start_new_cluster = 0;
2408 if (mkv->cluster_pos != -1 && start_new_cluster) {
2412 if (!mkv->cluster_pos)
2413 avio_write_marker(s->pb,
2414 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2415 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2417 // check if we have an audio packet cached
2418 if (mkv->cur_audio_pkt.size > 0) {
2419 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2420 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2421 mkv->is_dash ? start_new_cluster : 0);
2422 av_packet_unref(&mkv->cur_audio_pkt);
2424 av_log(s, AV_LOG_ERROR,
2425 "Could not write cached audio packet ret:%d\n", ret);
2430 // buffer an audio packet to ensure the packet containing the video
2431 // keyframe's timecode is contained in the same cluster for WebM
2432 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2434 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2436 ret = mkv_write_packet_internal(s, pkt, 0);
2440 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2442 MatroskaMuxContext *mkv = s->priv_data;
2445 if (mkv->cluster_pos != -1) {
2447 av_log(s, AV_LOG_DEBUG,
2448 "Flushing cluster at offset %" PRIu64 " bytes\n",
2453 return mkv_write_packet(s, pkt);
2456 static int mkv_write_trailer(AVFormatContext *s)
2458 MatroskaMuxContext *mkv = s->priv_data;
2459 AVIOContext *pb = s->pb;
2462 // check if we have an audio packet cached
2463 if (mkv->cur_audio_pkt.size > 0) {
2464 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2466 av_log(s, AV_LOG_ERROR,
2467 "Could not write cached audio packet ret:%d\n", ret);
2472 if (mkv->cluster_bc) {
2473 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0);
2476 ret = mkv_write_chapters(s);
2481 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2482 int64_t endpos, ret64;
2484 endpos = avio_tell(pb);
2486 if (mkv->cues.num_entries) {
2489 int64_t cuespos = endpos;
2490 int length_size = 0;
2492 ret = start_ebml_master_crc32(&cues, mkv);
2496 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2497 mkv->tracks, s->nb_streams);
2499 ffio_free_dyn_buf(&cues);
2503 if (mkv->reserve_cues_space) {
2504 size = avio_tell(cues);
2505 length_size = ebml_num_size(size);
2506 size += 4 + length_size;
2507 if (mkv->reserve_cues_space < size) {
2508 av_log(s, AV_LOG_WARNING,
2509 "Insufficient space reserved for Cues: "
2510 "%d < %"PRIu64". No Cues will be output.\n",
2511 mkv->reserve_cues_space, size);
2512 mkv->reserve_cues_space = -1;
2513 ffio_free_dyn_buf(&cues);
2516 cuespos = mkv->cues_pos;
2517 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2518 ffio_free_dyn_buf(&cues);
2521 if (mkv->reserve_cues_space == size + 1) {
2522 /* There is no way to reserve a single byte because
2523 * the minimal size of an EBML Void element is 2
2524 * (1 byte ID, 1 byte length field). This problem
2525 * is solved by writing the Cues' length field on
2526 * one byte more than necessary. */
2532 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2533 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES, length_size);
2534 if (mkv->reserve_cues_space) {
2535 if (size < mkv->reserve_cues_space)
2536 put_ebml_void(pb, mkv->reserve_cues_space - size);
2538 endpos = avio_tell(pb);
2542 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2546 // update the duration
2547 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2548 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2549 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2550 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0);
2552 // write tracks master
2553 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2554 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0);
2556 // update stream durations
2557 if (!mkv->is_live) {
2559 int64_t curr = avio_tell(mkv->tags_bc);
2560 for (i = 0; i < s->nb_streams; ++i) {
2561 AVStream *st = s->streams[i];
2562 mkv_track *track = &mkv->tracks[i];
2564 if (track->duration_offset > 0) {
2565 double duration_sec = track->duration * av_q2d(st->time_base);
2566 char duration_string[20] = "";
2568 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2571 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2573 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2574 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2575 fmod(duration_sec, 60));
2577 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2580 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2582 if (mkv->tags_bc && !mkv->is_live) {
2583 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2584 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0);
2587 avio_seek(pb, endpos, SEEK_SET);
2590 if (!mkv->is_live) {
2591 end_ebml_master(pb, mkv->segment);
2594 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2597 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2600 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2601 if (ff_mkv_codec_tags[i].id == codec_id)
2604 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2605 enum AVMediaType type = avcodec_get_type(codec_id);
2606 // mkv theoretically supports any video/audio through VFW/ACM
2607 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2614 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2617 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2618 if (ff_webm_codec_tags[i].id == codec_id)
2624 static int mkv_init(struct AVFormatContext *s)
2628 if (s->nb_streams > MAX_TRACKS) {
2629 av_log(s, AV_LOG_ERROR,
2630 "At most %d streams are supported for muxing in Matroska\n",
2632 return AVERROR(EINVAL);
2635 for (i = 0; i < s->nb_streams; i++) {
2636 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2637 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2638 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2639 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2640 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2641 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2642 av_log(s, AV_LOG_ERROR,
2643 "The Matroska muxer does not yet support muxing %s\n",
2644 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2645 return AVERROR_PATCHWELCOME;
2649 if (s->avoid_negative_ts < 0) {
2650 s->avoid_negative_ts = 1;
2651 s->internal->avoid_negative_ts_use_pts = 1;
2654 for (i = 0; i < s->nb_streams; i++) {
2655 // ms precision is the de-facto standard timescale for mkv files
2656 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2662 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2665 AVStream *st = s->streams[pkt->stream_index];
2667 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2668 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2669 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2670 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2671 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2677 static const AVCodecTag additional_audio_tags[] = {
2678 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2679 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2680 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2681 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2682 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2683 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2684 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2685 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2686 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2687 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2688 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2689 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2690 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2693 static const AVCodecTag additional_video_tags[] = {
2694 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2695 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2696 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2697 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2700 static const AVCodecTag additional_subtitle_tags[] = {
2701 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2702 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2703 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2704 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2707 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2708 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2709 static const AVOption options[] = {
2710 { "reserve_index_space", "Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues).", OFFSET(reserve_cues_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
2711 { "cluster_size_limit", "Store at most the provided amount of bytes in a cluster. ", OFFSET(cluster_size_limit), AV_OPT_TYPE_INT , { .i64 = -1 }, -1, INT_MAX, FLAGS },
2712 { "cluster_time_limit", "Store at most the provided number of milliseconds in a cluster.", OFFSET(cluster_time_limit), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, FLAGS },
2713 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2714 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2715 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2716 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2717 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2721 #if CONFIG_MATROSKA_MUXER
2722 static const AVClass matroska_class = {
2723 .class_name = "matroska muxer",
2724 .item_name = av_default_item_name,
2726 .version = LIBAVUTIL_VERSION_INT,
2729 AVOutputFormat ff_matroska_muxer = {
2731 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2732 .mime_type = "video/x-matroska",
2733 .extensions = "mkv",
2734 .priv_data_size = sizeof(MatroskaMuxContext),
2735 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2736 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2737 .video_codec = CONFIG_LIBX264_ENCODER ?
2738 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2740 .deinit = mkv_deinit,
2741 .write_header = mkv_write_header,
2742 .write_packet = mkv_write_flush_packet,
2743 .write_trailer = mkv_write_trailer,
2744 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2745 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2746 .codec_tag = (const AVCodecTag* const []){
2747 ff_codec_bmp_tags, ff_codec_wav_tags,
2748 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2750 .subtitle_codec = AV_CODEC_ID_ASS,
2751 .query_codec = mkv_query_codec,
2752 .check_bitstream = mkv_check_bitstream,
2753 .priv_class = &matroska_class,
2757 #if CONFIG_WEBM_MUXER
2758 static const AVClass webm_class = {
2759 .class_name = "webm muxer",
2760 .item_name = av_default_item_name,
2762 .version = LIBAVUTIL_VERSION_INT,
2765 AVOutputFormat ff_webm_muxer = {
2767 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2768 .mime_type = "video/webm",
2769 .extensions = "webm",
2770 .priv_data_size = sizeof(MatroskaMuxContext),
2771 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2772 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2773 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2775 .deinit = mkv_deinit,
2776 .write_header = mkv_write_header,
2777 .write_packet = mkv_write_flush_packet,
2778 .write_trailer = mkv_write_trailer,
2779 .query_codec = webm_query_codec,
2780 .check_bitstream = mkv_check_bitstream,
2781 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2782 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2783 .priv_class = &webm_class,
2787 #if CONFIG_MATROSKA_AUDIO_MUXER
2788 static const AVClass mka_class = {
2789 .class_name = "matroska audio muxer",
2790 .item_name = av_default_item_name,
2792 .version = LIBAVUTIL_VERSION_INT,
2794 AVOutputFormat ff_matroska_audio_muxer = {
2796 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2797 .mime_type = "audio/x-matroska",
2798 .extensions = "mka",
2799 .priv_data_size = sizeof(MatroskaMuxContext),
2800 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2801 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2802 .video_codec = AV_CODEC_ID_NONE,
2804 .deinit = mkv_deinit,
2805 .write_header = mkv_write_header,
2806 .write_packet = mkv_write_flush_packet,
2807 .write_trailer = mkv_write_trailer,
2808 .check_bitstream = mkv_check_bitstream,
2809 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2811 .codec_tag = (const AVCodecTag* const []){
2812 ff_codec_wav_tags, additional_audio_tags, 0
2814 .priv_class = &mka_class,