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 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 3 8-byte uint max
174 * and one 1-byte uint for the track number (this assumes MAX_TRACKS to be <= 255) */
175 #define MAX_CUETRACKPOS_SIZE 35
177 /** per-cuepoint - 1 1-byte EBML ID, 1 1-byte EBML size, 8-byte uint max */
178 #define MAX_CUEPOINT_CONTENT_SIZE(num_tracks) 10 + MAX_CUETRACKPOS_SIZE * num_tracks
180 /** Seek preroll value for opus */
181 #define OPUS_SEEK_PREROLL 80000000
183 static int ebml_id_size(uint32_t id)
185 return (av_log2(id) + 7U) / 8;
188 static void put_ebml_id(AVIOContext *pb, uint32_t id)
190 int i = ebml_id_size(id);
192 avio_w8(pb, (uint8_t)(id >> (i * 8)));
196 * Write an EBML size meaning "unknown size".
198 * @param bytes The number of bytes the size should occupy (maximum: 8).
200 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
202 av_assert0(bytes <= 8);
203 avio_w8(pb, 0x1ff >> bytes);
204 ffio_fill(pb, 0xff, bytes - 1);
208 * Calculate how many bytes are needed to represent a given number in EBML.
210 static int ebml_num_size(uint64_t num)
213 while ((num + 1) >> bytes * 7)
219 * Write a number in EBML variable length format.
221 * @param bytes The number of bytes that need to be used to write the number.
222 * If zero, the minimal number of bytes will be used.
224 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
226 int i, needed_bytes = ebml_num_size(num);
228 // sizes larger than this are currently undefined in EBML
229 av_assert0(num < (1ULL << 56) - 1);
232 bytes = needed_bytes;
233 // The bytes needed to write the given size must not exceed
234 // the bytes that we ought to use.
235 av_assert0(bytes >= needed_bytes);
237 num |= 1ULL << bytes * 7;
238 for (i = bytes - 1; i >= 0; i--)
239 avio_w8(pb, (uint8_t)(num >> i * 8));
242 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
249 put_ebml_id(pb, elementid);
250 put_ebml_num(pb, bytes, 0);
251 for (i = bytes - 1; i >= 0; i--)
252 avio_w8(pb, (uint8_t)(val >> i * 8));
255 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
258 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
260 while (tmp>>=8) bytes++;
262 put_ebml_id(pb, elementid);
263 put_ebml_num(pb, bytes, 0);
264 for (i = bytes - 1; i >= 0; i--)
265 avio_w8(pb, (uint8_t)(val >> i * 8));
268 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
270 put_ebml_id(pb, elementid);
271 put_ebml_num(pb, 8, 0);
272 avio_wb64(pb, av_double2int(val));
275 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
276 const void *buf, int size)
278 put_ebml_id(pb, elementid);
279 put_ebml_num(pb, size, 0);
280 avio_write(pb, buf, size);
283 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
286 put_ebml_binary(pb, elementid, str, strlen(str));
290 * Write a void element of a given size. Useful for reserving space in
291 * the file to be written to later.
293 * @param size The number of bytes to reserve, which must be at least 2.
295 static void put_ebml_void(AVIOContext *pb, uint64_t size)
297 int64_t currentpos = avio_tell(pb);
299 av_assert0(size >= 2);
301 put_ebml_id(pb, EBML_ID_VOID);
302 // we need to subtract the length needed to store the size from the
303 // size we need to reserve so 2 cases, we use 8 bytes to store the
304 // size if possible, 1 byte otherwise
306 put_ebml_num(pb, size - 2, 0);
308 put_ebml_num(pb, size - 9, 8);
309 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
312 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
313 uint64_t expectedsize)
315 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
317 put_ebml_id(pb, elementid);
318 put_ebml_size_unknown(pb, bytes);
319 return (ebml_master) { avio_tell(pb), bytes };
322 static void end_ebml_master(AVIOContext *pb, ebml_master master)
324 int64_t pos = avio_tell(pb);
326 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
328 put_ebml_num(pb, pos - master.pos, master.sizebytes);
329 avio_seek(pb, pos, SEEK_SET);
332 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
337 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
340 put_ebml_id(pb, elementid);
342 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
347 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
349 uint8_t *buf, crc[4];
352 size = avio_close_dyn_buf(*dyn_cp, &buf);
353 put_ebml_num(pb, size, 0);
354 if (mkv->write_crc) {
355 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
356 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
357 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
359 avio_write(pb, buf + skip, size - skip);
366 * Complete ebml master without destroying the buffer, allowing for later updates
368 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
372 int size = avio_get_dyn_buf(*dyn_cp, &buf);
374 *pos = avio_tell(pb);
376 put_ebml_num(pb, size, 0);
377 avio_write(pb, buf, size);
380 static void put_xiph_size(AVIOContext *pb, int size)
382 ffio_fill(pb, 255, size / 255);
383 avio_w8(pb, size % 255);
387 * Free the members allocated in the mux context.
389 static void mkv_deinit(AVFormatContext *s)
391 MatroskaMuxContext *mkv = s->priv_data;
393 av_packet_unref(&mkv->cur_audio_pkt);
395 ffio_free_dyn_buf(&mkv->cluster_bc);
396 ffio_free_dyn_buf(&mkv->info_bc);
397 ffio_free_dyn_buf(&mkv->tracks_bc);
398 ffio_free_dyn_buf(&mkv->tags_bc);
400 av_freep(&mkv->cues.entries);
401 if (mkv->attachments) {
402 av_freep(&mkv->attachments->entries);
403 av_freep(&mkv->attachments);
405 av_freep(&mkv->tracks);
409 * Initialize the SeekHead element to be ready to index level 1 Matroska
410 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
411 * will be reserved at the current file location.
413 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
415 mkv->seekhead.filepos = avio_tell(pb);
416 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
417 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
418 // that an EBML void element will fit afterwards
419 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
420 put_ebml_void(pb, mkv->seekhead.reserved_size);
423 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
426 mkv_seekhead *seekhead = &mkv->seekhead;
428 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
430 seekhead->entries[seekhead->num_entries].elementid = elementid;
431 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
435 * Write the SeekHead to the file at the location reserved for it
436 * and seek to destpos afterwards. When error_on_seek_failure
437 * is not set, failure to seek to the position designated for the
438 * SeekHead is not considered an error and it is presumed that
439 * destpos is the current position; failure to seek to destpos
440 * afterwards is always an error.
442 * @return 0 on success, < 0 on error.
444 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
445 int error_on_seek_failure, int64_t destpos)
448 mkv_seekhead *seekhead = &mkv->seekhead;
449 int64_t remaining, ret64;
452 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
453 return error_on_seek_failure ? ret64 : 0;
455 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD);
459 for (i = 0; i < seekhead->num_entries; i++) {
460 mkv_seekhead_entry *entry = &seekhead->entries[i];
461 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
464 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
465 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
466 put_ebml_id(dyn_cp, entry->elementid);
468 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
469 end_ebml_master(dyn_cp, seekentry);
471 end_ebml_master_crc32(pb, &dyn_cp, mkv);
473 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
474 put_ebml_void(pb, remaining);
476 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
482 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int tracknum, int64_t ts,
483 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
485 mkv_cues *cues = &mkv->cues;
486 mkv_cuepoint *entries = cues->entries;
491 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
493 return AVERROR(ENOMEM);
494 cues->entries = entries;
496 cues->entries[cues->num_entries].pts = ts;
497 cues->entries[cues->num_entries].stream_idx = stream;
498 cues->entries[cues->num_entries].tracknum = tracknum;
499 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
500 cues->entries[cues->num_entries].relative_pos = relative_pos;
501 cues->entries[cues->num_entries++].duration = duration;
506 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
508 MatroskaMuxContext *mkv = s->priv_data;
509 AVIOContext *dyn_cp, *pb = s->pb;
513 currentpos = avio_tell(pb);
514 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
518 for (i = 0; i < cues->num_entries; i++) {
519 ebml_master cuepoint, track_positions;
520 mkv_cuepoint *entry = &cues->entries[i];
521 uint64_t pts = entry->pts;
524 // Calculate the number of entries, so we know the element size
525 for (j = 0; j < num_tracks; j++)
526 tracks[j].has_cue = 0;
527 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
528 int idx = entry[j].stream_idx;
530 av_assert0(idx >= 0 && idx < num_tracks);
531 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
533 tracks[idx].has_cue = 1;
537 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_CONTENT_SIZE(ctp_nb));
538 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
540 // put all the entries from different tracks that have the exact same
541 // timestamp into the same CuePoint
542 for (j = 0; j < num_tracks; j++)
543 tracks[j].has_cue = 0;
544 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
545 int idx = entry[j].stream_idx;
547 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
549 tracks[idx].has_cue = 1;
550 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
551 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
552 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
553 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
554 if (entry[j].duration != -1)
555 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
556 end_ebml_master(dyn_cp, track_positions);
559 end_ebml_master(dyn_cp, cuepoint);
561 end_ebml_master_crc32(pb, &dyn_cp, mkv);
566 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
568 const uint8_t *header_start[3];
570 int first_header_size;
573 if (par->codec_id == AV_CODEC_ID_VORBIS)
574 first_header_size = 30;
576 first_header_size = 42;
578 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
579 first_header_size, header_start, header_len) < 0) {
580 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
584 avio_w8(pb, 2); // number packets - 1
585 for (j = 0; j < 2; j++) {
586 put_xiph_size(pb, header_len[j]);
588 for (j = 0; j < 3; j++)
589 avio_write(pb, header_start[j], header_len[j]);
594 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
596 if (par->extradata && par->extradata_size == 2)
597 avio_write(pb, par->extradata, 2);
599 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
603 static int put_flac_codecpriv(AVFormatContext *s,
604 AVIOContext *pb, AVCodecParameters *par)
606 int write_comment = (par->channel_layout &&
607 !(par->channel_layout & ~0x3ffffULL) &&
608 !ff_flac_is_native_layout(par->channel_layout));
609 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
616 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
617 "Lavf" : LIBAVFORMAT_IDENT;
618 AVDictionary *dict = NULL;
619 uint8_t buf[32], *data, *p;
622 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
623 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
625 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
626 if (len >= ((1<<24) - 4)) {
628 return AVERROR(EINVAL);
631 data = av_malloc(len + 4);
634 return AVERROR(ENOMEM);
638 AV_WB24(data + 1, len);
641 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
643 avio_write(pb, data, len + 4);
652 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
653 int *sample_rate, int *output_sample_rate)
655 MPEG4AudioConfig mp4ac;
658 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
659 /* Don't abort if the failure is because of missing extradata. Assume in that
660 * case a bitstream filter will provide the muxer with the extradata in the
662 * Abort however if s->pb is not seekable, as we would not be able to seek back
663 * to write the sample rate elements once the extradata shows up, anyway. */
664 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
665 av_log(s, AV_LOG_ERROR,
666 "Error parsing AAC extradata, unable to determine samplerate.\n");
667 return AVERROR(EINVAL);
671 /* This will only happen when this function is called while writing the
672 * header and no extradata is available. The space for this element has
673 * to be reserved for when this function is called again after the
674 * extradata shows up in the first packet, as there's no way to know if
675 * output_sample_rate will be different than sample_rate or not. */
676 *output_sample_rate = *sample_rate;
678 *sample_rate = mp4ac.sample_rate;
679 *output_sample_rate = mp4ac.ext_sample_rate;
684 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
685 AVCodecParameters *par,
688 switch (par->codec_id) {
689 case AV_CODEC_ID_VORBIS:
690 case AV_CODEC_ID_THEORA:
691 return put_xiph_codecpriv(s, dyn_cp, par);
692 case AV_CODEC_ID_FLAC:
693 return put_flac_codecpriv(s, dyn_cp, par);
694 case AV_CODEC_ID_WAVPACK:
695 return put_wv_codecpriv(dyn_cp, par);
696 case AV_CODEC_ID_H264:
697 return ff_isom_write_avcc(dyn_cp, par->extradata,
698 par->extradata_size);
699 case AV_CODEC_ID_HEVC:
700 return ff_isom_write_hvcc(dyn_cp, par->extradata,
701 par->extradata_size, 0);
702 case AV_CODEC_ID_AV1:
703 if (par->extradata_size)
704 return ff_isom_write_av1c(dyn_cp, par->extradata,
705 par->extradata_size);
707 put_ebml_void(pb, 4 + 3);
709 case AV_CODEC_ID_ALAC:
710 if (par->extradata_size < 36) {
711 av_log(s, AV_LOG_ERROR,
712 "Invalid extradata found, ALAC expects a 36-byte "
714 return AVERROR_INVALIDDATA;
716 avio_write(dyn_cp, par->extradata + 12,
717 par->extradata_size - 12);
719 case AV_CODEC_ID_AAC:
720 if (par->extradata_size)
721 avio_write(dyn_cp, par->extradata, par->extradata_size);
723 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
726 if (par->codec_id == AV_CODEC_ID_PRORES &&
727 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
728 avio_wl32(dyn_cp, par->codec_tag);
729 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
730 avio_write(dyn_cp, par->extradata, par->extradata_size);
736 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
737 AVCodecParameters *par,
738 int native_id, int qt_id)
742 int ret, codecpriv_size;
744 ret = avio_open_dyn_buf(&dyn_cp);
749 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
750 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
753 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
755 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
756 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
759 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
760 avio_wl32(dyn_cp, par->codec_tag);
761 for(i = 0; i < 0x5a - 8; i++)
764 avio_write(dyn_cp, par->extradata, par->extradata_size);
766 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
767 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
768 avcodec_get_name(par->codec_id));
771 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
773 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
774 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
775 avcodec_get_name(par->codec_id));
776 ret = AVERROR(EINVAL);
779 ff_put_bmp_header(dyn_cp, par, 0, 0);
781 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
783 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
785 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
786 avcodec_get_name(par->codec_id));
787 ret = AVERROR(EINVAL);
790 par->codec_tag = tag;
792 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
795 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
797 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
799 ffio_free_dyn_buf(&dyn_cp);
803 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
805 uint8_t *colorinfo_ptr;
806 int side_data_size = 0;
807 int ret, colorinfo_size;
808 const uint8_t *side_data;
810 ret = avio_open_dyn_buf(&dyn_cp);
814 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
815 par->color_trc < AVCOL_TRC_NB) {
816 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
819 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
820 par->color_space < AVCOL_SPC_NB) {
821 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
823 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
824 par->color_primaries < AVCOL_PRI_NB) {
825 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
827 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
828 par->color_range < AVCOL_RANGE_NB) {
829 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
831 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
832 par->chroma_location <= AVCHROMA_LOC_TOP) {
835 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
836 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
837 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
840 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
842 if (side_data_size) {
843 const AVContentLightMetadata *metadata =
844 (const AVContentLightMetadata*)side_data;
845 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
846 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
849 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
851 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
852 ebml_master meta_element = start_ebml_master(
853 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
854 const AVMasteringDisplayMetadata *metadata =
855 (const AVMasteringDisplayMetadata*)side_data;
856 if (metadata->has_primaries) {
857 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
858 av_q2d(metadata->display_primaries[0][0]));
859 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
860 av_q2d(metadata->display_primaries[0][1]));
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
862 av_q2d(metadata->display_primaries[1][0]));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
864 av_q2d(metadata->display_primaries[1][1]));
865 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
866 av_q2d(metadata->display_primaries[2][0]));
867 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
868 av_q2d(metadata->display_primaries[2][1]));
869 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
870 av_q2d(metadata->white_point[0]));
871 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
872 av_q2d(metadata->white_point[1]));
874 if (metadata->has_luminance) {
875 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
876 av_q2d(metadata->max_luminance));
877 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
878 av_q2d(metadata->min_luminance));
880 end_ebml_master(dyn_cp, meta_element);
883 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
884 if (colorinfo_size) {
885 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
886 avio_write(pb, colorinfo_ptr, colorinfo_size);
887 end_ebml_master(pb, colorinfo);
889 ffio_free_dyn_buf(&dyn_cp);
893 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
896 ebml_master projection;
897 int side_data_size = 0;
900 const AVSphericalMapping *spherical =
901 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
907 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
908 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
909 spherical->projection != AV_SPHERICAL_CUBEMAP) {
910 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
914 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
915 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
916 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
917 4 * (2 + 1 + 8) + (2 + 1 + 20));
919 switch (spherical->projection) {
920 case AV_SPHERICAL_EQUIRECTANGULAR:
921 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
922 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
924 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
925 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
926 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
927 AV_WB32(private, 0); // version + flags
928 AV_WB32(private + 4, spherical->bound_top);
929 AV_WB32(private + 8, spherical->bound_bottom);
930 AV_WB32(private + 12, spherical->bound_left);
931 AV_WB32(private + 16, spherical->bound_right);
932 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
935 case AV_SPHERICAL_CUBEMAP:
936 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
937 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
938 AV_WB32(private, 0); // version + flags
939 AV_WB32(private + 4, 0); // layout
940 AV_WB32(private + 8, spherical->padding);
941 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
949 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
950 (double) spherical->yaw / (1 << 16));
951 if (spherical->pitch)
952 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
953 (double) spherical->pitch / (1 << 16));
955 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
956 (double) spherical->roll / (1 << 16));
958 end_ebml_master(pb, projection);
963 static void mkv_write_field_order(AVIOContext *pb, int mode,
964 enum AVFieldOrder field_order)
966 switch (field_order) {
967 case AV_FIELD_UNKNOWN:
969 case AV_FIELD_PROGRESSIVE:
970 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
971 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
977 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
978 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
979 if (mode != MODE_WEBM) {
980 switch (field_order) {
982 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
983 MATROSKA_VIDEO_FIELDORDER_TT);
986 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
987 MATROSKA_VIDEO_FIELDORDER_BB);
990 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
991 MATROSKA_VIDEO_FIELDORDER_TB);
994 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
995 MATROSKA_VIDEO_FIELDORDER_BT);
1002 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1003 AVStream *st, int mode, int *h_width, int *h_height)
1007 AVDictionaryEntry *tag;
1008 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1012 // convert metadata into proper side data and add it to the stream
1013 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1014 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1015 int stereo_mode = atoi(tag->value);
1017 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1018 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1023 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1024 stereo_mode != 10 && stereo_mode != 12) {
1025 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1031 // iterate to find the stereo3d side data
1032 for (i = 0; i < st->nb_side_data; i++) {
1033 AVPacketSideData sd = st->side_data[i];
1034 if (sd.type == AV_PKT_DATA_STEREO3D) {
1035 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1037 switch (stereo->type) {
1038 case AV_STEREO3D_2D:
1039 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1041 case AV_STEREO3D_SIDEBYSIDE:
1042 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1043 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1044 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1047 case AV_STEREO3D_TOPBOTTOM:
1048 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1049 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1053 case AV_STEREO3D_CHECKERBOARD:
1054 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1055 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1058 case AV_STEREO3D_LINES:
1059 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1060 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1064 case AV_STEREO3D_COLUMNS:
1065 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1066 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1070 case AV_STEREO3D_FRAMESEQUENCE:
1071 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1072 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1080 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1083 // if webm, do not write unsupported modes
1084 if ((mode == MODE_WEBM &&
1085 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1086 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1087 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1088 av_log(s, AV_LOG_ERROR,
1089 "The specified stereo mode is not valid.\n");
1090 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1091 return AVERROR(EINVAL);
1094 // write StereoMode if format is valid
1095 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1100 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1101 int i, AVIOContext *pb, int default_stream_exists)
1103 AVStream *st = s->streams[i];
1104 AVCodecParameters *par = st->codecpar;
1105 ebml_master subinfo, track;
1108 int bit_depth = av_get_bits_per_sample(par->codec_id);
1109 int sample_rate = par->sample_rate;
1110 int output_sample_rate = 0;
1111 int display_width_div = 1;
1112 int display_height_div = 1;
1114 AVDictionaryEntry *tag;
1116 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1117 mkv->have_attachments = 1;
1121 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1122 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1123 if (par->bits_per_raw_sample)
1124 bit_depth = par->bits_per_raw_sample;
1126 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1129 bit_depth = par->bits_per_coded_sample;
1132 if (par->codec_id == AV_CODEC_ID_AAC) {
1133 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1134 &output_sample_rate);
1139 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1140 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1141 mkv->is_dash ? mkv->dash_track_number : i + 1);
1142 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1143 mkv->is_dash ? mkv->dash_track_number : i + 1);
1144 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1146 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1147 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1148 tag = av_dict_get(st->metadata, "language", NULL, 0);
1149 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1150 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1151 } else if (tag && tag->value) {
1152 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1155 // The default value for TRACKFLAGDEFAULT is 1, so add element
1156 // if we need to clear it.
1157 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1158 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1160 if (st->disposition & AV_DISPOSITION_FORCED)
1161 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1163 if (mkv->mode == MODE_WEBM) {
1164 const char *codec_id;
1165 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1166 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1167 if (ff_webm_codec_tags[j].id == par->codec_id) {
1168 codec_id = ff_webm_codec_tags[j].str;
1173 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1174 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1175 codec_id = "D_WEBVTT/CAPTIONS";
1176 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1177 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1178 codec_id = "D_WEBVTT/DESCRIPTIONS";
1179 native_id = MATROSKA_TRACK_TYPE_METADATA;
1180 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1181 codec_id = "D_WEBVTT/METADATA";
1182 native_id = MATROSKA_TRACK_TYPE_METADATA;
1184 codec_id = "D_WEBVTT/SUBTITLES";
1185 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1190 av_log(s, AV_LOG_ERROR,
1191 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1192 return AVERROR(EINVAL);
1195 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1197 // look for a codec ID string specific to mkv to use,
1198 // if none are found, use AVI codes
1199 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1200 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1201 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1202 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1208 if (mkv->allow_raw_vfw) {
1211 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1212 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1213 return AVERROR(EINVAL);
1218 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1219 int64_t codecdelay = av_rescale_q(par->initial_padding,
1220 (AVRational){ 1, 48000 },
1221 (AVRational){ 1, 1000000000 });
1222 if (codecdelay < 0) {
1223 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1224 return AVERROR(EINVAL);
1226 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1227 // (AVRational){ 1, par->sample_rate },
1230 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1232 if (par->codec_id == AV_CODEC_ID_OPUS) {
1233 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1236 switch (par->codec_type) {
1237 case AVMEDIA_TYPE_VIDEO:
1238 mkv->have_video = 1;
1239 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1241 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1242 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1243 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1244 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1245 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1246 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1249 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1250 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1251 par->codec_id == AV_CODEC_ID_SVQ1 ||
1252 par->codec_id == AV_CODEC_ID_SVQ3 ||
1253 par->codec_id == AV_CODEC_ID_CINEPAK))
1257 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1258 else if (!native_id) {
1259 // if there is no mkv-specific codec ID, use VFW mode
1260 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1261 mkv->tracks[i].write_dts = 1;
1262 s->internal->avoid_negative_ts_use_pts = 0;
1265 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1267 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1268 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1270 mkv_write_field_order(pb, mkv->mode, par->field_order);
1272 // check both side data and metadata for stereo information,
1273 // write the result to the bitstream if any is found
1274 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1276 &display_height_div);
1280 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1281 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1282 (par->format == AV_PIX_FMT_YUVA420P)) {
1283 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1286 // write DisplayWidth and DisplayHeight, they contain the size of
1287 // a single source view and/or the display aspect ratio
1288 if (st->sample_aspect_ratio.num) {
1289 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1290 if (d_width > INT_MAX) {
1291 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1292 return AVERROR(EINVAL);
1294 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1295 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1296 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1297 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1299 AVRational display_aspect_ratio;
1300 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1301 par->width * (int64_t)st->sample_aspect_ratio.num,
1302 par->height * (int64_t)st->sample_aspect_ratio.den,
1304 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1305 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1306 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1309 } else if (display_width_div != 1 || display_height_div != 1) {
1310 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1311 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1312 } else if (mkv->mode != MODE_WEBM)
1313 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1315 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1316 uint32_t color_space = av_le2ne32(par->codec_tag);
1317 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1319 ret = mkv_write_video_color(pb, par, st);
1322 ret = mkv_write_video_projection(s, pb, st);
1325 end_ebml_master(pb, subinfo);
1328 case AVMEDIA_TYPE_AUDIO:
1329 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1332 // no mkv-specific ID, use ACM mode
1333 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1335 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1336 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1338 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1339 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1340 if (output_sample_rate)
1341 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1343 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1344 end_ebml_master(pb, subinfo);
1347 case AVMEDIA_TYPE_SUBTITLE:
1349 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1350 return AVERROR(ENOSYS);
1353 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1354 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1356 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1359 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1360 return AVERROR(EINVAL);
1363 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1364 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1365 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1370 end_ebml_master(pb, track);
1375 static int mkv_write_tracks(AVFormatContext *s)
1377 MatroskaMuxContext *mkv = s->priv_data;
1378 AVIOContext *pb = s->pb;
1379 int i, ret, default_stream_exists = 0;
1381 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1383 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1387 for (i = 0; i < s->nb_streams; i++) {
1388 AVStream *st = s->streams[i];
1389 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1391 for (i = 0; i < s->nb_streams; i++) {
1392 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1397 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1398 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, &mkv->tracks_pos);
1400 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
1405 static int mkv_write_chapters(AVFormatContext *s)
1407 MatroskaMuxContext *mkv = s->priv_data;
1408 AVIOContext *dyn_cp, *pb = s->pb;
1409 ebml_master editionentry;
1410 AVRational scale = {1, 1E9};
1413 if (!s->nb_chapters || mkv->wrote_chapters)
1416 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1418 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1419 if (ret < 0) return ret;
1421 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1422 if (mkv->mode != MODE_WEBM) {
1423 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1424 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1426 for (i = 0; i < s->nb_chapters; i++) {
1427 ebml_master chapteratom, chapterdisplay;
1428 AVChapter *c = s->chapters[i];
1429 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1430 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1431 AVDictionaryEntry *t = NULL;
1432 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1433 av_log(s, AV_LOG_ERROR,
1434 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1435 chapterstart, chapterend);
1436 return AVERROR_INVALIDDATA;
1439 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1440 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1441 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1442 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1443 if (mkv->mode != MODE_WEBM) {
1444 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1445 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1447 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1448 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1449 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1450 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1451 end_ebml_master(dyn_cp, chapterdisplay);
1453 end_ebml_master(dyn_cp, chapteratom);
1455 end_ebml_master(dyn_cp, editionentry);
1456 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1458 mkv->wrote_chapters = 1;
1462 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1464 uint8_t *key = av_strdup(t->key);
1466 const uint8_t *lang = NULL;
1470 return AVERROR(ENOMEM);
1472 if ((p = strrchr(p, '-')) &&
1473 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1480 else if (*p >= 'a' && *p <= 'z')
1485 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1486 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1488 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1489 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1490 end_ebml_master(pb, tag);
1496 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1497 unsigned int uid, ebml_master *tag)
1500 MatroskaMuxContext *mkv = s->priv_data;
1501 ebml_master targets;
1504 if (!mkv->tags_bc) {
1505 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1507 ret = start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1513 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1514 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1516 put_ebml_uint(pb, elementid, uid);
1517 end_ebml_master(pb, targets);
1521 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1523 return av_strcasecmp(name, "title") &&
1524 av_strcasecmp(name, "stereo_mode") &&
1525 av_strcasecmp(name, "creation_time") &&
1526 av_strcasecmp(name, "encoding_tool") &&
1527 av_strcasecmp(name, "duration") &&
1528 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1529 av_strcasecmp(name, "language")) &&
1530 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1531 (av_strcasecmp(name, "filename") &&
1532 av_strcasecmp(name, "mimetype")));
1535 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1538 MatroskaMuxContext *mkv = s->priv_data;
1541 AVDictionaryEntry *t = NULL;
1543 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1547 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1548 if (mkv_check_tag_name(t->key, elementid)) {
1549 ret = mkv_write_simpletag(mkv->tags_bc, t);
1555 end_ebml_master(mkv->tags_bc, tag);
1559 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1561 AVDictionaryEntry *t = NULL;
1563 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1564 if (mkv_check_tag_name(t->key, elementid))
1570 static int mkv_write_tags(AVFormatContext *s)
1572 MatroskaMuxContext *mkv = s->priv_data;
1575 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1577 if (mkv_check_tag(s->metadata, 0)) {
1578 ret = mkv_write_tag(s, s->metadata, 0, 0);
1579 if (ret < 0) return ret;
1582 for (i = 0; i < s->nb_streams; i++) {
1583 AVStream *st = s->streams[i];
1585 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1588 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1591 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1592 if (ret < 0) return ret;
1595 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1596 for (i = 0; i < s->nb_streams; i++) {
1598 AVStream *st = s->streams[i];
1599 ebml_master tag_target;
1602 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1605 ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
1606 i + 1, &tag_target);
1611 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1612 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1613 mkv->tracks[i].duration_offset = avio_tell(pb);
1615 // Reserve space to write duration as a 20-byte string.
1616 // 2 (ebml id) + 1 (data size) + 20 (data)
1617 put_ebml_void(pb, 23);
1618 end_ebml_master(pb, tag);
1619 end_ebml_master(pb, tag_target);
1623 if (mkv->mode != MODE_WEBM) {
1624 for (i = 0; i < s->nb_chapters; i++) {
1625 AVChapter *ch = s->chapters[i];
1627 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1630 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1636 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1637 for (i = 0; i < mkv->attachments->num_entries; i++) {
1638 mkv_attachment *attachment = &mkv->attachments->entries[i];
1639 AVStream *st = s->streams[attachment->stream_idx];
1641 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1644 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1651 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1652 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, &mkv->tags_pos);
1654 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv);
1659 static int mkv_write_attachments(AVFormatContext *s)
1661 MatroskaMuxContext *mkv = s->priv_data;
1662 AVIOContext *dyn_cp, *pb = s->pb;
1666 if (!mkv->have_attachments)
1669 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1670 if (!mkv->attachments)
1671 return AVERROR(ENOMEM);
1673 av_lfg_init(&c, av_get_random_seed());
1675 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1677 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1678 if (ret < 0) return ret;
1680 for (i = 0; i < s->nb_streams; i++) {
1681 AVStream *st = s->streams[i];
1682 ebml_master attached_file;
1683 mkv_attachment *attachment = mkv->attachments->entries;
1684 AVDictionaryEntry *t;
1685 const char *mimetype = NULL;
1688 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1691 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1693 return AVERROR(ENOMEM);
1694 mkv->attachments->entries = attachment;
1696 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1698 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1699 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1700 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1701 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1702 return AVERROR(EINVAL);
1704 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1705 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1706 mimetype = t->value;
1707 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1709 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1710 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1711 mimetype = ff_mkv_mime_tags[i].str;
1714 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1715 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1716 mimetype = ff_mkv_image_mime_tags[i].str;
1721 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1722 "it cannot be deduced from the codec id.\n", i);
1723 return AVERROR(EINVAL);
1726 if (s->flags & AVFMT_FLAG_BITEXACT) {
1727 struct AVSHA *sha = av_sha_alloc();
1730 return AVERROR(ENOMEM);
1731 av_sha_init(sha, 160);
1732 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1733 av_sha_final(sha, digest);
1735 fileuid = AV_RL32(digest);
1737 fileuid = av_lfg_get(&c);
1739 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1740 fileuid, mkv->attachments->num_entries);
1742 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1743 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1744 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1745 end_ebml_master(dyn_cp, attached_file);
1747 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1748 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1750 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1755 static int64_t get_metadata_duration(AVFormatContext *s)
1761 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1762 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1763 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1767 for (i = 0; i < s->nb_streams; i++) {
1769 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1771 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1772 max = FFMAX(max, us);
1775 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1779 static int mkv_write_header(AVFormatContext *s)
1781 MatroskaMuxContext *mkv = s->priv_data;
1782 AVIOContext *pb = s->pb;
1783 ebml_master ebml_header;
1784 AVDictionaryEntry *tag;
1785 int ret, i, version = 2;
1786 int64_t creation_time;
1788 if (!strcmp(s->oformat->name, "webm")) {
1789 mkv->mode = MODE_WEBM;
1792 mkv->mode = MODE_MATROSKAv2;
1794 if (mkv->mode != MODE_WEBM ||
1795 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1796 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1799 for (i = 0; i < s->nb_streams; i++) {
1800 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1801 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1802 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1806 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1808 return AVERROR(ENOMEM);
1810 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1811 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1812 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1813 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1814 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1815 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1816 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1817 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1818 end_ebml_master(pb, ebml_header);
1820 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1821 mkv->segment_offset = avio_tell(pb);
1823 // we write a seek head at the beginning to point to all other level
1824 // one elements (except Clusters).
1825 mkv_start_seekhead(mkv, pb);
1827 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1829 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1834 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1835 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1836 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1837 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1838 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1839 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1840 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1842 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1844 if (mkv->mode != MODE_WEBM) {
1845 uint32_t segment_uid[4];
1848 av_lfg_init(&lfg, av_get_random_seed());
1850 for (i = 0; i < 4; i++)
1851 segment_uid[i] = av_lfg_get(&lfg);
1853 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1856 const char *ident = "Lavf";
1857 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1858 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1861 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1862 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1863 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1864 uint8_t date_utc_buf[8];
1865 AV_WB64(date_utc_buf, date_utc);
1866 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1869 // reserve space for the duration
1871 mkv->duration_offset = avio_tell(pb);
1872 if (!mkv->is_live) {
1873 int64_t metadata_duration = get_metadata_duration(s);
1875 if (s->duration > 0) {
1876 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1877 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1878 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1879 } else if (metadata_duration > 0) {
1880 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1881 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1882 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1884 put_ebml_void(pb, 11); // assumes double-precision float to be written
1887 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1888 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, &mkv->info_pos);
1890 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv);
1893 ret = mkv_write_tracks(s);
1897 for (i = 0; i < s->nb_chapters; i++)
1898 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1900 ret = mkv_write_chapters(s);
1904 if (mkv->mode != MODE_WEBM) {
1905 ret = mkv_write_attachments(s);
1910 ret = mkv_write_tags(s);
1914 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1915 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1920 if (s->metadata_header_padding > 0) {
1921 if (s->metadata_header_padding == 1)
1922 s->metadata_header_padding++;
1923 put_ebml_void(pb, s->metadata_header_padding);
1926 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1927 mkv->cues_pos = avio_tell(pb);
1928 if (mkv->reserve_cues_space == 1)
1929 mkv->reserve_cues_space++;
1930 put_ebml_void(pb, mkv->reserve_cues_space);
1933 av_init_packet(&mkv->cur_audio_pkt);
1934 mkv->cur_audio_pkt.size = 0;
1935 mkv->cluster_pos = -1;
1937 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1938 // after 4k and on a keyframe
1939 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1940 if (mkv->cluster_time_limit < 0)
1941 mkv->cluster_time_limit = 5000;
1942 if (mkv->cluster_size_limit < 0)
1943 mkv->cluster_size_limit = 5 * 1024 * 1024;
1945 if (mkv->cluster_time_limit < 0)
1946 mkv->cluster_time_limit = 1000;
1947 if (mkv->cluster_size_limit < 0)
1948 mkv->cluster_size_limit = 32 * 1024;
1954 static int mkv_blockgroup_size(int pkt_size)
1956 int size = pkt_size + 4;
1957 size += ebml_num_size(size);
1958 size += 2; // EBML ID for block and block duration
1959 size += 9; // max size of block duration incl. length field
1963 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1970 dst = av_malloc(srclen);
1972 return AVERROR(ENOMEM);
1974 while (srclen >= WV_HEADER_SIZE) {
1977 ret = ff_wv_parse_header(&header, src);
1980 src += WV_HEADER_SIZE;
1981 srclen -= WV_HEADER_SIZE;
1983 if (srclen < header.blocksize) {
1984 ret = AVERROR_INVALIDDATA;
1988 if (header.initial) {
1989 AV_WL32(dst + offset, header.samples);
1992 AV_WL32(dst + offset, header.flags);
1993 AV_WL32(dst + offset + 4, header.crc);
1996 if (!(header.initial && header.final)) {
1997 AV_WL32(dst + offset, header.blocksize);
2001 memcpy(dst + offset, src, header.blocksize);
2002 src += header.blocksize;
2003 srclen -= header.blocksize;
2004 offset += header.blocksize;
2016 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2017 uint32_t blockid, AVPacket *pkt, int keyframe)
2019 MatroskaMuxContext *mkv = s->priv_data;
2020 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2021 mkv_track *track = &mkv->tracks[pkt->stream_index];
2022 uint8_t *data = NULL, *side_data = NULL;
2023 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2024 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2025 uint64_t additional_id = 0;
2026 int64_t discard_padding = 0;
2027 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2028 ebml_master block_group, block_additions, block_more;
2030 ts += track->ts_offset;
2032 /* The following string is identical to the one in mkv_write_vtt_blocks
2033 * so that only one copy needs to exist in binaries. */
2034 av_log(s, AV_LOG_DEBUG,
2035 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2036 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2037 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2038 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2039 mkv->cluster_pos, track_number, keyframe != 0);
2041 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2042 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2043 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2044 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2045 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2046 /* extradata is Annex B, assume the bitstream is too and convert it */
2047 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2048 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2049 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2050 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2051 err = mkv_strip_wavpack(pkt->data, &data, &size);
2056 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2057 "a packet from stream %d.\n", pkt->stream_index);
2061 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2062 /* Matroska specification requires to remove the first QuickTime atom
2068 side_data = av_packet_get_side_data(pkt,
2069 AV_PKT_DATA_SKIP_SAMPLES,
2071 if (side_data && side_data_size >= 10) {
2072 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2073 (AVRational){1, par->sample_rate},
2074 (AVRational){1, 1000000000});
2077 side_data = av_packet_get_side_data(pkt,
2078 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2081 if (side_data_size < 8) {
2084 additional_id = AV_RB64(side_data);
2086 side_data_size -= 8;
2090 if ((side_data_size && additional_id == 1) || discard_padding) {
2091 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2092 blockid = MATROSKA_ID_BLOCK;
2095 put_ebml_id(pb, blockid);
2096 put_ebml_num(pb, size + 4, 0);
2097 // this assumes stream_index is less than 126
2098 avio_w8(pb, 0x80 | track_number);
2099 avio_wb16(pb, ts - mkv->cluster_pts);
2100 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2101 avio_write(pb, data + offset, size);
2102 if (data != pkt->data)
2105 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2106 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2108 track->last_timestamp = ts;
2110 if (discard_padding) {
2111 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2114 if (side_data_size && additional_id == 1) {
2115 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2116 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2117 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2118 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2119 put_ebml_num(pb, side_data_size, 0);
2120 avio_write(pb, side_data, side_data_size);
2121 end_ebml_master(pb, block_more);
2122 end_ebml_master(pb, block_additions);
2124 if ((side_data_size && additional_id == 1) || discard_padding) {
2125 end_ebml_master(pb, block_group);
2131 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2133 MatroskaMuxContext *mkv = s->priv_data;
2134 ebml_master blockgroup;
2135 int id_size, settings_size, size;
2136 uint8_t *id, *settings;
2137 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2138 const int flags = 0;
2141 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2145 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2148 size = id_size + 1 + settings_size + 1 + pkt->size;
2150 /* The following string is identical to the one in mkv_write_block so that
2151 * only one copy needs to exist in binaries. */
2152 av_log(s, AV_LOG_DEBUG,
2153 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2154 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2155 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2156 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2157 mkv->cluster_pos, pkt->stream_index + 1, 1);
2159 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2161 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2162 put_ebml_num(pb, size + 4, 0);
2163 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2164 avio_wb16(pb, ts - mkv->cluster_pts);
2166 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2168 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2169 end_ebml_master(pb, blockgroup);
2171 return pkt->duration;
2174 static void mkv_end_cluster(AVFormatContext *s)
2176 MatroskaMuxContext *mkv = s->priv_data;
2178 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2179 mkv->cluster_pos = -1;
2180 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2183 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2185 MatroskaMuxContext *mkv = s->priv_data;
2186 mkv_track *track = &mkv->tracks[pkt->stream_index];
2187 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2189 int side_data_size = 0, ret;
2191 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2194 switch (par->codec_id) {
2195 case AV_CODEC_ID_AAC:
2196 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2197 int filler, output_sample_rate = 0;
2199 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2200 &output_sample_rate);
2203 if (!output_sample_rate)
2204 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2205 ret = ff_alloc_extradata(par, side_data_size);
2208 memcpy(par->extradata, side_data, side_data_size);
2209 curpos = avio_tell(mkv->tracks_bc);
2210 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2211 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2212 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2214 put_ebml_void(mkv->tracks_bc, filler);
2215 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2216 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2217 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2218 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2219 } else if (!par->extradata_size && !track->sample_rate) {
2220 // No extradata (codecpar or packet side data).
2221 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2222 return AVERROR(EINVAL);
2225 case AV_CODEC_ID_FLAC:
2226 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2227 AVCodecParameters *codecpriv_par;
2229 if (side_data_size != par->extradata_size) {
2230 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2232 return AVERROR(EINVAL);
2234 codecpriv_par = avcodec_parameters_alloc();
2236 return AVERROR(ENOMEM);
2237 ret = avcodec_parameters_copy(codecpriv_par, par);
2239 avcodec_parameters_free(&codecpriv_par);
2242 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2243 curpos = avio_tell(mkv->tracks_bc);
2244 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2245 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2246 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2247 avcodec_parameters_free(&codecpriv_par);
2250 // FIXME: Remove the following once libaom starts propagating extradata during init()
2251 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2252 case AV_CODEC_ID_AV1:
2253 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2254 !par->extradata_size) {
2255 AVIOContext *dyn_cp;
2259 ret = avio_open_dyn_buf(&dyn_cp);
2262 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2263 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2264 if (!codecpriv_size) {
2266 return AVERROR_INVALIDDATA;
2268 curpos = avio_tell(mkv->tracks_bc);
2269 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2270 // Do not write the OBUs as we don't have space saved for them
2271 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2273 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2274 ret = ff_alloc_extradata(par, side_data_size);
2277 memcpy(par->extradata, side_data, side_data_size);
2278 } else if (!par->extradata_size)
2279 return AVERROR_INVALIDDATA;
2283 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2290 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2292 MatroskaMuxContext *mkv = s->priv_data;
2294 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2295 mkv_track *track = &mkv->tracks[pkt->stream_index];
2296 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2297 int duration = pkt->duration;
2299 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2300 int64_t relative_packet_pos;
2301 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2303 if (ts == AV_NOPTS_VALUE) {
2304 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2305 return AVERROR(EINVAL);
2307 ts += track->ts_offset;
2309 if (mkv->cluster_pos != -1) {
2310 int64_t cluster_time = ts - mkv->cluster_pts;
2311 if ((int16_t)cluster_time != cluster_time) {
2313 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2317 if (mkv->cluster_pos == -1) {
2318 mkv->cluster_pos = avio_tell(s->pb);
2319 ret = start_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2322 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2323 mkv->cluster_pts = FFMAX(0, ts);
2324 av_log(s, AV_LOG_DEBUG,
2325 "Starting new cluster with timestamp "
2326 "%" PRId64 " at offset %" PRId64 " bytes\n",
2327 mkv->cluster_pts, mkv->cluster_pos);
2329 pb = mkv->cluster_bc;
2331 relative_packet_pos = avio_tell(pb);
2333 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2334 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2337 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2338 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2339 mkv->cluster_pos, relative_packet_pos, -1);
2340 if (ret < 0) return ret;
2343 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2344 duration = mkv_write_vtt_blocks(s, pb, pkt);
2346 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2347 mkv_blockgroup_size(pkt->size));
2349 #if FF_API_CONVERGENCE_DURATION
2350 FF_DISABLE_DEPRECATION_WARNINGS
2351 /* For backward compatibility, prefer convergence_duration. */
2352 if (pkt->convergence_duration > 0) {
2353 duration = pkt->convergence_duration;
2355 FF_ENABLE_DEPRECATION_WARNINGS
2357 /* All subtitle blocks are considered to be keyframes. */
2358 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2359 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2360 end_ebml_master(pb, blockgroup);
2363 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2364 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2365 mkv->cluster_pos, relative_packet_pos, duration);
2371 mkv->duration = FFMAX(mkv->duration, ts + duration);
2372 track->duration = FFMAX(track->duration, ts + duration);
2377 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2379 MatroskaMuxContext *mkv = s->priv_data;
2380 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2381 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2383 int64_t cluster_time;
2385 int start_new_cluster;
2387 ret = mkv_check_new_extra_data(s, pkt);
2391 if (mkv->tracks[pkt->stream_index].write_dts)
2392 cluster_time = pkt->dts - mkv->cluster_pts;
2394 cluster_time = pkt->pts - mkv->cluster_pts;
2395 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2397 cluster_size = avio_tell(mkv->cluster_bc);
2399 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2400 // WebM DASH specification states that the first block of every cluster
2401 // has to be a key frame. So for DASH video, we only create a cluster
2402 // on seeing key frames.
2403 start_new_cluster = keyframe;
2404 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2405 (mkv->cluster_pos == -1 ||
2406 cluster_time > mkv->cluster_time_limit)) {
2407 // For DASH audio, we create a Cluster based on cluster_time_limit
2408 start_new_cluster = 1;
2409 } else if (!mkv->is_dash &&
2410 (cluster_size > mkv->cluster_size_limit ||
2411 cluster_time > mkv->cluster_time_limit ||
2412 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2413 cluster_size > 4 * 1024))) {
2414 start_new_cluster = 1;
2416 start_new_cluster = 0;
2419 if (mkv->cluster_pos != -1 && start_new_cluster) {
2423 if (!mkv->cluster_pos)
2424 avio_write_marker(s->pb,
2425 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2426 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2428 // check if we have an audio packet cached
2429 if (mkv->cur_audio_pkt.size > 0) {
2430 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2431 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2432 mkv->is_dash ? start_new_cluster : 0);
2433 av_packet_unref(&mkv->cur_audio_pkt);
2435 av_log(s, AV_LOG_ERROR,
2436 "Could not write cached audio packet ret:%d\n", ret);
2441 // buffer an audio packet to ensure the packet containing the video
2442 // keyframe's timecode is contained in the same cluster for WebM
2443 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2445 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2447 ret = mkv_write_packet_internal(s, pkt, 0);
2451 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2453 MatroskaMuxContext *mkv = s->priv_data;
2456 if (mkv->cluster_pos != -1) {
2458 av_log(s, AV_LOG_DEBUG,
2459 "Flushing cluster at offset %" PRIu64 " bytes\n",
2464 return mkv_write_packet(s, pkt);
2467 static int mkv_write_trailer(AVFormatContext *s)
2469 MatroskaMuxContext *mkv = s->priv_data;
2470 AVIOContext *pb = s->pb;
2471 int64_t currentpos, cuespos;
2474 // check if we have an audio packet cached
2475 if (mkv->cur_audio_pkt.size > 0) {
2476 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2478 av_log(s, AV_LOG_ERROR,
2479 "Could not write cached audio packet ret:%d\n", ret);
2484 if (mkv->cluster_bc) {
2485 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv);
2488 ret = mkv_write_chapters(s);
2493 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2494 if (mkv->cues.num_entries) {
2495 if (mkv->reserve_cues_space) {
2498 currentpos = avio_tell(pb);
2499 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2501 cuespos = mkv_write_cues(s, &mkv->cues, mkv->tracks, s->nb_streams);
2502 cues_end = avio_tell(pb);
2503 if (cues_end > cuespos + mkv->reserve_cues_space) {
2504 av_log(s, AV_LOG_ERROR,
2505 "Insufficient space reserved for cues: %d "
2506 "(needed: %" PRId64 ").\n",
2507 mkv->reserve_cues_space, cues_end - cuespos);
2508 return AVERROR(EINVAL);
2511 if (cues_end < cuespos + mkv->reserve_cues_space)
2512 put_ebml_void(pb, mkv->reserve_cues_space -
2513 (cues_end - cuespos));
2515 avio_seek(pb, currentpos, SEEK_SET);
2517 cuespos = mkv_write_cues(s, &mkv->cues, mkv->tracks, s->nb_streams);
2520 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2523 currentpos = avio_tell(pb);
2525 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2529 // update the duration
2530 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2531 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2532 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2533 end_ebml_master_crc32(pb, &mkv->info_bc, mkv);
2535 // write tracks master
2536 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2537 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
2539 // update stream durations
2540 if (!mkv->is_live) {
2542 int64_t curr = avio_tell(mkv->tags_bc);
2543 for (i = 0; i < s->nb_streams; ++i) {
2544 AVStream *st = s->streams[i];
2545 mkv_track *track = &mkv->tracks[i];
2547 if (track->duration_offset > 0) {
2548 double duration_sec = track->duration * av_q2d(st->time_base);
2549 char duration_string[20] = "";
2551 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2554 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2556 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2557 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2558 fmod(duration_sec, 60));
2560 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2563 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2565 if (mkv->tags_bc && !mkv->is_live) {
2566 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2567 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv);
2570 avio_seek(pb, currentpos, SEEK_SET);
2573 if (!mkv->is_live) {
2574 end_ebml_master(pb, mkv->segment);
2580 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2583 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2584 if (ff_mkv_codec_tags[i].id == codec_id)
2587 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2588 enum AVMediaType type = avcodec_get_type(codec_id);
2589 // mkv theoretically supports any video/audio through VFW/ACM
2590 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2597 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2600 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2601 if (ff_webm_codec_tags[i].id == codec_id)
2607 static int mkv_init(struct AVFormatContext *s)
2611 if (s->nb_streams > MAX_TRACKS) {
2612 av_log(s, AV_LOG_ERROR,
2613 "At most %d streams are supported for muxing in Matroska\n",
2615 return AVERROR(EINVAL);
2618 for (i = 0; i < s->nb_streams; i++) {
2619 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2620 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2621 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2622 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2623 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2624 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2625 av_log(s, AV_LOG_ERROR,
2626 "The Matroska muxer does not yet support muxing %s\n",
2627 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2628 return AVERROR_PATCHWELCOME;
2632 if (s->avoid_negative_ts < 0) {
2633 s->avoid_negative_ts = 1;
2634 s->internal->avoid_negative_ts_use_pts = 1;
2637 for (i = 0; i < s->nb_streams; i++) {
2638 // ms precision is the de-facto standard timescale for mkv files
2639 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2645 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2648 AVStream *st = s->streams[pkt->stream_index];
2650 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2651 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2652 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2653 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2654 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2660 static const AVCodecTag additional_audio_tags[] = {
2661 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2662 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2663 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2664 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2665 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2666 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2667 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2668 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2669 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2670 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2671 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2672 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2673 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2676 static const AVCodecTag additional_video_tags[] = {
2677 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2678 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2679 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2680 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2683 static const AVCodecTag additional_subtitle_tags[] = {
2684 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2685 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2686 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2687 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2690 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2691 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2692 static const AVOption options[] = {
2693 { "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 },
2694 { "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 },
2695 { "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 },
2696 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2697 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2698 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2699 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2700 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2704 #if CONFIG_MATROSKA_MUXER
2705 static const AVClass matroska_class = {
2706 .class_name = "matroska muxer",
2707 .item_name = av_default_item_name,
2709 .version = LIBAVUTIL_VERSION_INT,
2712 AVOutputFormat ff_matroska_muxer = {
2714 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2715 .mime_type = "video/x-matroska",
2716 .extensions = "mkv",
2717 .priv_data_size = sizeof(MatroskaMuxContext),
2718 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2719 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2720 .video_codec = CONFIG_LIBX264_ENCODER ?
2721 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2723 .deinit = mkv_deinit,
2724 .write_header = mkv_write_header,
2725 .write_packet = mkv_write_flush_packet,
2726 .write_trailer = mkv_write_trailer,
2727 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2728 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2729 .codec_tag = (const AVCodecTag* const []){
2730 ff_codec_bmp_tags, ff_codec_wav_tags,
2731 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2733 .subtitle_codec = AV_CODEC_ID_ASS,
2734 .query_codec = mkv_query_codec,
2735 .check_bitstream = mkv_check_bitstream,
2736 .priv_class = &matroska_class,
2740 #if CONFIG_WEBM_MUXER
2741 static const AVClass webm_class = {
2742 .class_name = "webm muxer",
2743 .item_name = av_default_item_name,
2745 .version = LIBAVUTIL_VERSION_INT,
2748 AVOutputFormat ff_webm_muxer = {
2750 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2751 .mime_type = "video/webm",
2752 .extensions = "webm",
2753 .priv_data_size = sizeof(MatroskaMuxContext),
2754 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2755 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2756 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2758 .deinit = mkv_deinit,
2759 .write_header = mkv_write_header,
2760 .write_packet = mkv_write_flush_packet,
2761 .write_trailer = mkv_write_trailer,
2762 .query_codec = webm_query_codec,
2763 .check_bitstream = mkv_check_bitstream,
2764 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2765 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2766 .priv_class = &webm_class,
2770 #if CONFIG_MATROSKA_AUDIO_MUXER
2771 static const AVClass mka_class = {
2772 .class_name = "matroska audio muxer",
2773 .item_name = av_default_item_name,
2775 .version = LIBAVUTIL_VERSION_INT,
2777 AVOutputFormat ff_matroska_audio_muxer = {
2779 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2780 .mime_type = "audio/x-matroska",
2781 .extensions = "mka",
2782 .priv_data_size = sizeof(MatroskaMuxContext),
2783 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2784 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2785 .video_codec = AV_CODEC_ID_NONE,
2787 .deinit = mkv_deinit,
2788 .write_header = mkv_write_header,
2789 .write_packet = mkv_write_flush_packet,
2790 .write_trailer = mkv_write_trailer,
2791 .check_bitstream = mkv_check_bitstream,
2792 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2794 .codec_tag = (const AVCodecTag* const []){
2795 ff_codec_wav_tags, additional_audio_tags, 0
2797 .priv_class = &mka_class,