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 "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/crc.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/intreadwrite.h"
44 #include "libavutil/lfg.h"
45 #include "libavutil/mastering_display_metadata.h"
46 #include "libavutil/mathematics.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/parseutils.h"
49 #include "libavutil/random_seed.h"
50 #include "libavutil/rational.h"
51 #include "libavutil/samplefmt.h"
52 #include "libavutil/stereo3d.h"
54 #include "libavcodec/xiph.h"
55 #include "libavcodec/mpeg4audio.h"
57 /* Level 1 elements we create a SeekHead entry for:
58 * Info, Tracks, Chapters, Attachments, Tags and Cues */
59 #define MAX_SEEKHEAD_ENTRIES 6
63 DEFAULT_MODE_INFER_NO_SUBS,
64 DEFAULT_MODE_PASSTHROUGH,
67 typedef struct ebml_master {
68 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
69 int sizebytes; ///< how many bytes were reserved for the size
72 typedef struct mkv_seekhead_entry {
77 typedef struct mkv_seekhead {
79 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
84 typedef struct mkv_cuepoint {
87 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
88 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
89 int64_t duration; ///< duration of the block according to time base
92 typedef struct mkv_cues {
93 mkv_cuepoint *entries;
97 typedef struct mkv_track {
104 int64_t sample_rate_offset;
105 int64_t last_timestamp;
107 int64_t duration_offset;
108 int64_t codecpriv_offset;
112 #define MODE_MATROSKAv2 0x01
113 #define MODE_WEBM 0x02
115 typedef struct MatroskaMuxContext {
116 const AVClass *class;
118 AVIOContext *tags_bc;
120 AVIOContext *info_bc;
122 AVIOContext *tracks_bc;
125 int64_t segment_offset;
126 AVIOContext *cluster_bc;
127 int64_t cluster_pos; ///< file offset of the current cluster
129 int64_t duration_offset;
131 mkv_seekhead seekhead;
135 AVPacket cur_audio_pkt;
137 unsigned nb_attachments;
140 int reserve_cues_space;
141 int cluster_size_limit;
143 int64_t cluster_time_limit;
145 int dash_track_number;
149 uint32_t chapter_id_offset;
155 uint32_t segment_uid[4];
156 } MatroskaMuxContext;
158 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
159 * 8 byte for "matroska" doctype string */
160 #define MAX_EBML_HEADER_SIZE 35
162 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
163 * offset, 4 bytes for target EBML ID */
164 #define MAX_SEEKENTRY_SIZE 21
166 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
167 #define MAX_CUETRACKPOS_SIZE 40
169 /** Seek preroll value for opus */
170 #define OPUS_SEEK_PREROLL 80000000
172 static int ebml_id_size(uint32_t id)
174 return (av_log2(id) + 7U) / 8;
177 static void put_ebml_id(AVIOContext *pb, uint32_t id)
179 int i = ebml_id_size(id);
181 avio_w8(pb, (uint8_t)(id >> (i * 8)));
185 * Write an EBML size meaning "unknown size".
187 * @param bytes The number of bytes the size should occupy (maximum: 8).
189 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
191 av_assert0(bytes <= 8);
192 avio_w8(pb, 0x1ff >> bytes);
193 ffio_fill(pb, 0xff, bytes - 1);
197 * Returns how many bytes are needed to represent a number
198 * as EBML variable length integer.
200 static int ebml_num_size(uint64_t num)
210 * Calculate how many bytes are needed to represent the length field
211 * of an EBML element whose payload has a given length.
213 static int ebml_length_size(uint64_t length)
215 return ebml_num_size(length + 1);
219 * Write a number as EBML variable length integer on `bytes` bytes.
220 * `bytes` is taken literally without checking.
222 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
224 num |= 1ULL << bytes * 7;
225 for (int i = bytes - 1; i >= 0; i--)
226 avio_w8(pb, (uint8_t)(num >> i * 8));
230 * Write a length as EBML variable length integer.
232 * @param bytes The number of bytes that need to be used to write the number.
233 * If zero, the minimal number of bytes will be used.
235 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
237 int needed_bytes = ebml_length_size(length);
239 // sizes larger than this are currently undefined in EBML
240 av_assert0(length < (1ULL << 56) - 1);
243 bytes = needed_bytes;
244 // The bytes needed to write the given size must not exceed
245 // the bytes that we ought to use.
246 av_assert0(bytes >= needed_bytes);
247 put_ebml_num(pb, length, bytes);
251 * Write a (random) UID with fixed size to make the output more deterministic
253 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
255 put_ebml_id(pb, elementid);
256 put_ebml_length(pb, 8, 0);
260 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
267 put_ebml_id(pb, elementid);
268 put_ebml_length(pb, bytes, 0);
269 for (i = bytes - 1; i >= 0; i--)
270 avio_w8(pb, (uint8_t)(val >> i * 8));
273 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
276 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
281 put_ebml_id(pb, elementid);
282 put_ebml_length(pb, bytes, 0);
283 for (i = bytes - 1; i >= 0; i--)
284 avio_w8(pb, (uint8_t)(val >> i * 8));
287 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
289 put_ebml_id(pb, elementid);
290 put_ebml_length(pb, 8, 0);
291 avio_wb64(pb, av_double2int(val));
294 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
295 const void *buf, int size)
297 put_ebml_id(pb, elementid);
298 put_ebml_length(pb, size, 0);
299 avio_write(pb, buf, size);
302 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
305 put_ebml_binary(pb, elementid, str, strlen(str));
309 * Write a void element of a given size. Useful for reserving space in
310 * the file to be written to later.
312 * @param size The number of bytes to reserve, which must be at least 2.
314 static void put_ebml_void(AVIOContext *pb, int size)
316 av_assert0(size >= 2);
318 put_ebml_id(pb, EBML_ID_VOID);
319 // we need to subtract the length needed to store the size from the
320 // size we need to reserve so 2 cases, we use 8 bytes to store the
321 // size if possible, 1 byte otherwise
324 put_ebml_length(pb, size, 0);
327 put_ebml_length(pb, size, 8);
329 ffio_fill(pb, 0, size);
332 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
333 uint64_t expectedsize)
335 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
337 put_ebml_id(pb, elementid);
338 put_ebml_size_unknown(pb, bytes);
339 return (ebml_master) { avio_tell(pb), bytes };
342 static void end_ebml_master(AVIOContext *pb, ebml_master master)
344 int64_t pos = avio_tell(pb);
346 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
348 put_ebml_length(pb, pos - master.pos, master.sizebytes);
349 avio_seek(pb, pos, SEEK_SET);
352 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
356 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
360 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
365 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
366 MatroskaMuxContext *mkv, uint32_t id,
367 int length_size, int keep_buffer)
369 uint8_t *buf, crc[4];
373 size = avio_get_dyn_buf(*dyn_cp, &buf);
374 put_ebml_length(pb, size, length_size);
375 if (mkv->write_crc) {
376 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
377 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
378 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
380 avio_write(pb, buf + skip, size - skip);
383 ffio_reset_dyn_buf(*dyn_cp);
385 ffio_free_dyn_buf(dyn_cp);
390 * Complete ebml master without destroying the buffer, allowing for later updates
392 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
393 uint32_t id, int64_t *pos)
396 int size = avio_get_dyn_buf(dyn_cp, &buf);
398 *pos = avio_tell(pb);
401 put_ebml_length(pb, size, 0);
402 avio_write(pb, buf, size);
405 static void put_xiph_size(AVIOContext *pb, int size)
407 ffio_fill(pb, 255, size / 255);
408 avio_w8(pb, size % 255);
412 * Free the members allocated in the mux context.
414 static void mkv_deinit(AVFormatContext *s)
416 MatroskaMuxContext *mkv = s->priv_data;
418 av_packet_unref(&mkv->cur_audio_pkt);
420 ffio_free_dyn_buf(&mkv->cluster_bc);
421 ffio_free_dyn_buf(&mkv->info_bc);
422 ffio_free_dyn_buf(&mkv->tracks_bc);
423 ffio_free_dyn_buf(&mkv->tags_bc);
425 av_freep(&mkv->cues.entries);
426 av_freep(&mkv->tracks);
430 * Initialize the SeekHead element to be ready to index level 1 Matroska
431 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
432 * will be reserved at the current file location.
434 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
436 mkv->seekhead.filepos = avio_tell(pb);
437 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
438 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
439 // that an EBML void element will fit afterwards
440 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
441 put_ebml_void(pb, mkv->seekhead.reserved_size);
444 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
447 mkv_seekhead *seekhead = &mkv->seekhead;
449 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
451 seekhead->entries[seekhead->num_entries].elementid = elementid;
452 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
456 * Write the SeekHead to the file at the location reserved for it
457 * and seek to destpos afterwards. When error_on_seek_failure
458 * is not set, failure to seek to the position designated for the
459 * SeekHead is not considered an error and it is presumed that
460 * destpos is the current position; failure to seek to destpos
461 * afterwards is always an error.
463 * @return 0 on success, < 0 on error.
465 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
466 int error_on_seek_failure, int64_t destpos)
468 AVIOContext *dyn_cp = NULL;
469 mkv_seekhead *seekhead = &mkv->seekhead;
470 int64_t remaining, ret64;
473 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
474 return error_on_seek_failure ? ret64 : 0;
476 ret = start_ebml_master_crc32(&dyn_cp, mkv);
480 for (i = 0; i < seekhead->num_entries; i++) {
481 mkv_seekhead_entry *entry = &seekhead->entries[i];
482 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
485 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
486 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
487 put_ebml_id(dyn_cp, entry->elementid);
489 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
490 end_ebml_master(dyn_cp, seekentry);
492 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0);
494 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
495 put_ebml_void(pb, remaining);
497 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
503 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
504 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
506 mkv_cues *cues = &mkv->cues;
507 mkv_cuepoint *entries = cues->entries;
512 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
514 return AVERROR(ENOMEM);
515 cues->entries = entries;
517 cues->entries[cues->num_entries].pts = ts;
518 cues->entries[cues->num_entries].stream_idx = stream;
519 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
520 cues->entries[cues->num_entries].relative_pos = relative_pos;
521 cues->entries[cues->num_entries++].duration = duration;
526 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
527 mkv_cues *cues, mkv_track *tracks, int num_tracks)
529 AVIOContext *cuepoint;
532 ret = avio_open_dyn_buf(&cuepoint);
536 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
538 uint64_t pts = entry->pts;
542 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
544 // put all the entries from different tracks that have the exact same
545 // timestamp into the same CuePoint
546 for (int j = 0; j < num_tracks; j++)
547 tracks[j].has_cue = 0;
549 ebml_master track_positions;
550 int idx = entry->stream_idx;
552 av_assert0(idx >= 0 && idx < num_tracks);
553 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
555 tracks[idx].has_cue = 1;
556 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
557 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
558 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
559 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
560 if (entry->duration != -1)
561 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
562 end_ebml_master(cuepoint, track_positions);
563 } while (++entry < end && entry->pts == pts);
564 size = avio_get_dyn_buf(cuepoint, &buf);
565 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
566 ffio_reset_dyn_buf(cuepoint);
568 ffio_free_dyn_buf(&cuepoint);
573 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb,
574 const AVCodecParameters *par)
576 const uint8_t *header_start[3];
578 int first_header_size;
581 if (par->codec_id == AV_CODEC_ID_VORBIS)
582 first_header_size = 30;
584 first_header_size = 42;
586 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
587 first_header_size, header_start, header_len) < 0) {
588 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
592 avio_w8(pb, 2); // number packets - 1
593 for (j = 0; j < 2; j++) {
594 put_xiph_size(pb, header_len[j]);
596 for (j = 0; j < 3; j++)
597 avio_write(pb, header_start[j], header_len[j]);
602 static int put_wv_codecpriv(AVIOContext *pb, const AVCodecParameters *par)
604 if (par->extradata && par->extradata_size == 2)
605 avio_write(pb, par->extradata, 2);
607 avio_wl16(pb, 0x410); // fallback to the most recent version
611 static int put_flac_codecpriv(AVFormatContext *s, AVIOContext *pb,
612 const AVCodecParameters *par)
614 int write_comment = (par->channel_layout &&
615 !(par->channel_layout & ~0x3ffffULL) &&
616 !ff_flac_is_native_layout(par->channel_layout));
617 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
624 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
625 "Lavf" : LIBAVFORMAT_IDENT;
626 AVDictionary *dict = NULL;
630 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
631 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
633 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
634 av_assert1(len < (1 << 24) - 4);
639 ff_vorbiscomment_write(pb, dict, vendor, NULL, 0);
647 static int get_aac_sample_rates(AVFormatContext *s, const uint8_t *extradata,
648 int extradata_size, int *sample_rate,
649 int *output_sample_rate)
651 MPEG4AudioConfig mp4ac;
654 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
655 /* Don't abort if the failure is because of missing extradata. Assume in that
656 * case a bitstream filter will provide the muxer with the extradata in the
658 * Abort however if s->pb is not seekable, as we would not be able to seek back
659 * to write the sample rate elements once the extradata shows up, anyway. */
660 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
661 av_log(s, AV_LOG_ERROR,
662 "Error parsing AAC extradata, unable to determine samplerate.\n");
663 return AVERROR(EINVAL);
667 /* This will only happen when this function is called while writing the
668 * header and no extradata is available. The space for this element has
669 * to be reserved for when this function is called again after the
670 * extradata shows up in the first packet, as there's no way to know if
671 * output_sample_rate will be different than sample_rate or not. */
672 *output_sample_rate = *sample_rate;
674 *sample_rate = mp4ac.sample_rate;
675 *output_sample_rate = mp4ac.ext_sample_rate;
680 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
681 const AVCodecParameters *par,
684 switch (par->codec_id) {
685 case AV_CODEC_ID_VORBIS:
686 case AV_CODEC_ID_THEORA:
687 return put_xiph_codecpriv(s, dyn_cp, par);
688 case AV_CODEC_ID_FLAC:
689 return put_flac_codecpriv(s, dyn_cp, par);
690 case AV_CODEC_ID_WAVPACK:
691 return put_wv_codecpriv(dyn_cp, par);
692 case AV_CODEC_ID_H264:
693 return ff_isom_write_avcc(dyn_cp, par->extradata,
694 par->extradata_size);
695 case AV_CODEC_ID_HEVC:
696 return ff_isom_write_hvcc(dyn_cp, par->extradata,
697 par->extradata_size, 0);
698 case AV_CODEC_ID_AV1:
699 if (par->extradata_size)
700 return ff_isom_write_av1c(dyn_cp, par->extradata,
701 par->extradata_size);
703 put_ebml_void(pb, 4 + 3);
705 case AV_CODEC_ID_ALAC:
706 if (par->extradata_size < 36) {
707 av_log(s, AV_LOG_ERROR,
708 "Invalid extradata found, ALAC expects a 36-byte "
710 return AVERROR_INVALIDDATA;
712 avio_write(dyn_cp, par->extradata + 12,
713 par->extradata_size - 12);
715 case AV_CODEC_ID_AAC:
716 if (par->extradata_size)
717 avio_write(dyn_cp, par->extradata, par->extradata_size);
719 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
722 if (par->codec_id == AV_CODEC_ID_PRORES &&
723 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
724 avio_wl32(dyn_cp, par->codec_tag);
725 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
726 avio_write(dyn_cp, par->extradata, par->extradata_size);
732 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
733 AVCodecParameters *par,
734 int native_id, int qt_id)
738 int ret, codecpriv_size;
740 ret = avio_open_dyn_buf(&dyn_cp);
745 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
746 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
749 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
751 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
752 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
755 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
756 avio_wl32(dyn_cp, par->codec_tag);
757 for(i = 0; i < 0x5a - 8; i++)
760 avio_write(dyn_cp, par->extradata, par->extradata_size);
762 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
763 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
764 avcodec_get_name(par->codec_id));
767 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
769 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
770 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
771 avcodec_get_name(par->codec_id));
772 ret = AVERROR(EINVAL);
775 ff_put_bmp_header(dyn_cp, par, 0, 0);
777 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
779 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
781 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
782 avcodec_get_name(par->codec_id));
783 ret = AVERROR(EINVAL);
786 par->codec_tag = tag;
788 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
791 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
793 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
795 ffio_free_dyn_buf(&dyn_cp);
799 static int mkv_write_video_color(AVIOContext *pb, const AVCodecParameters *par,
803 uint8_t *colorinfo_ptr;
804 int side_data_size = 0;
805 int ret, colorinfo_size;
806 const uint8_t *side_data;
808 ret = avio_open_dyn_buf(&dyn_cp);
812 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
813 par->color_trc < AVCOL_TRC_NB) {
814 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
817 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
818 par->color_space < AVCOL_SPC_NB) {
819 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
821 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
822 par->color_primaries < AVCOL_PRI_NB) {
823 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
825 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
826 par->color_range < AVCOL_RANGE_NB) {
827 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
829 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
830 par->chroma_location <= AVCHROMA_LOC_TOP) {
833 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
834 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
835 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
838 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
840 if (side_data_size) {
841 const AVContentLightMetadata *metadata =
842 (const AVContentLightMetadata*)side_data;
843 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
844 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
847 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
849 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
850 ebml_master meta_element = start_ebml_master(
851 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 10 * (2 + 1 + 8));
852 const AVMasteringDisplayMetadata *metadata =
853 (const AVMasteringDisplayMetadata*)side_data;
854 if (metadata->has_primaries) {
855 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
856 av_q2d(metadata->display_primaries[0][0]));
857 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
858 av_q2d(metadata->display_primaries[0][1]));
859 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
860 av_q2d(metadata->display_primaries[1][0]));
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
862 av_q2d(metadata->display_primaries[1][1]));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
864 av_q2d(metadata->display_primaries[2][0]));
865 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
866 av_q2d(metadata->display_primaries[2][1]));
867 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
868 av_q2d(metadata->white_point[0]));
869 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
870 av_q2d(metadata->white_point[1]));
872 if (metadata->has_luminance) {
873 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
874 av_q2d(metadata->max_luminance));
875 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
876 av_q2d(metadata->min_luminance));
878 end_ebml_master(dyn_cp, meta_element);
881 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
882 if (colorinfo_size) {
883 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
884 avio_write(pb, colorinfo_ptr, colorinfo_size);
885 end_ebml_master(pb, colorinfo);
887 ffio_free_dyn_buf(&dyn_cp);
891 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
894 ebml_master projection;
895 int side_data_size = 0;
898 const AVSphericalMapping *spherical =
899 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
905 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
906 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
907 spherical->projection != AV_SPHERICAL_CUBEMAP) {
908 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
912 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
913 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
914 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
915 4 * (2 + 1 + 8) + (2 + 1 + 20));
917 switch (spherical->projection) {
918 case AV_SPHERICAL_EQUIRECTANGULAR:
919 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
920 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
922 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
923 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
924 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
925 AV_WB32(private, 0); // version + flags
926 AV_WB32(private + 4, spherical->bound_top);
927 AV_WB32(private + 8, spherical->bound_bottom);
928 AV_WB32(private + 12, spherical->bound_left);
929 AV_WB32(private + 16, spherical->bound_right);
930 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
933 case AV_SPHERICAL_CUBEMAP:
934 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
935 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
936 AV_WB32(private, 0); // version + flags
937 AV_WB32(private + 4, 0); // layout
938 AV_WB32(private + 8, spherical->padding);
939 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
947 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
948 (double) spherical->yaw / (1 << 16));
949 if (spherical->pitch)
950 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
951 (double) spherical->pitch / (1 << 16));
953 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
954 (double) spherical->roll / (1 << 16));
956 end_ebml_master(pb, projection);
961 static void mkv_write_field_order(AVIOContext *pb, int mode,
962 enum AVFieldOrder field_order)
964 switch (field_order) {
965 case AV_FIELD_UNKNOWN:
967 case AV_FIELD_PROGRESSIVE:
968 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
969 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
975 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
976 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
977 if (mode != MODE_WEBM) {
978 switch (field_order) {
980 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
981 MATROSKA_VIDEO_FIELDORDER_TT);
984 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
985 MATROSKA_VIDEO_FIELDORDER_BB);
988 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
989 MATROSKA_VIDEO_FIELDORDER_TB);
992 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
993 MATROSKA_VIDEO_FIELDORDER_BT);
1000 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1001 AVStream *st, int mode, int *h_width, int *h_height)
1005 const AVDictionaryEntry *tag;
1006 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1010 // convert metadata into proper side data and add it to the stream
1011 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1012 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1013 int stereo_mode = atoi(tag->value);
1015 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1016 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1021 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1022 stereo_mode != 10 && stereo_mode != 12) {
1023 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1029 // iterate to find the stereo3d side data
1030 for (i = 0; i < st->nb_side_data; i++) {
1031 AVPacketSideData sd = st->side_data[i];
1032 if (sd.type == AV_PKT_DATA_STEREO3D) {
1033 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1035 switch (stereo->type) {
1036 case AV_STEREO3D_2D:
1037 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1039 case AV_STEREO3D_SIDEBYSIDE:
1040 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1041 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1042 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1045 case AV_STEREO3D_TOPBOTTOM:
1046 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1047 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1051 case AV_STEREO3D_CHECKERBOARD:
1052 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1053 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1056 case AV_STEREO3D_LINES:
1057 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1058 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1062 case AV_STEREO3D_COLUMNS:
1063 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1064 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1068 case AV_STEREO3D_FRAMESEQUENCE:
1069 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1070 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1078 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1081 // if webm, do not write unsupported modes
1082 if ((mode == MODE_WEBM &&
1083 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1084 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1085 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1086 av_log(s, AV_LOG_ERROR,
1087 "The specified stereo mode is not valid.\n");
1088 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1089 return AVERROR(EINVAL);
1092 // write StereoMode if format is valid
1093 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1098 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1099 AVStream *st, mkv_track *track, AVIOContext *pb,
1102 AVCodecParameters *par = st->codecpar;
1103 ebml_master subinfo, track_master;
1107 int sample_rate = par->sample_rate;
1108 int output_sample_rate = 0;
1109 int display_width_div = 1;
1110 int display_height_div = 1;
1112 const AVDictionaryEntry *tag;
1114 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1117 if (par->codec_id == AV_CODEC_ID_AAC) {
1118 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1119 &output_sample_rate);
1124 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1125 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1126 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1127 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGLACING, 0); // no lacing (yet)
1129 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1130 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1131 tag = av_dict_get(st->metadata, "language", NULL, 0);
1132 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1133 tag && tag->value ? tag->value : "und");
1135 // The default value for TRACKFLAGDEFAULT is 1, so add element
1136 // if we need to clear it.
1138 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, 0);
1140 if (st->disposition & AV_DISPOSITION_FORCED)
1141 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1143 if (mkv->mode == MODE_WEBM) {
1144 const char *codec_id;
1145 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1146 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1147 if (ff_webm_codec_tags[j].id == par->codec_id) {
1148 codec_id = ff_webm_codec_tags[j].str;
1153 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1154 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1155 codec_id = "D_WEBVTT/CAPTIONS";
1156 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1157 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1158 codec_id = "D_WEBVTT/DESCRIPTIONS";
1159 native_id = MATROSKA_TRACK_TYPE_METADATA;
1160 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1161 codec_id = "D_WEBVTT/METADATA";
1162 native_id = MATROSKA_TRACK_TYPE_METADATA;
1164 codec_id = "D_WEBVTT/SUBTITLES";
1165 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1170 av_log(s, AV_LOG_ERROR,
1171 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1172 return AVERROR(EINVAL);
1175 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1177 // look for a codec ID string specific to mkv to use,
1178 // if none are found, use AVI codes
1179 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1180 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1181 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1182 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1188 if (mkv->allow_raw_vfw) {
1191 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1192 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1193 return AVERROR(EINVAL);
1198 switch (par->codec_type) {
1199 case AVMEDIA_TYPE_VIDEO:
1200 mkv->have_video = 1;
1201 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1203 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1204 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1205 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1206 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1207 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1208 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1211 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1212 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1213 par->codec_id == AV_CODEC_ID_SVQ1 ||
1214 par->codec_id == AV_CODEC_ID_SVQ3 ||
1215 par->codec_id == AV_CODEC_ID_CINEPAK))
1219 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1220 else if (!native_id) {
1221 // if there is no mkv-specific codec ID, use VFW mode
1222 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1223 track->write_dts = 1;
1224 s->internal->avoid_negative_ts_use_pts = 0;
1227 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1229 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1230 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1232 mkv_write_field_order(pb, mkv->mode, par->field_order);
1234 // check both side data and metadata for stereo information,
1235 // write the result to the bitstream if any is found
1236 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1238 &display_height_div);
1242 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1243 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1244 (par->format == AV_PIX_FMT_YUVA420P)) {
1245 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1248 // write DisplayWidth and DisplayHeight, they contain the size of
1249 // a single source view and/or the display aspect ratio
1250 if (st->sample_aspect_ratio.num) {
1251 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1252 if (d_width > INT_MAX) {
1253 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1254 return AVERROR(EINVAL);
1256 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1257 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1258 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1259 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1261 AVRational display_aspect_ratio;
1262 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1263 par->width * (int64_t)st->sample_aspect_ratio.num,
1264 par->height * (int64_t)st->sample_aspect_ratio.den,
1266 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1267 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1268 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1271 } else if (display_width_div != 1 || display_height_div != 1) {
1272 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1273 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1274 } else if (mkv->mode != MODE_WEBM)
1275 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1277 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1278 uint32_t color_space = av_le2ne32(par->codec_tag);
1279 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1281 ret = mkv_write_video_color(pb, par, st);
1284 ret = mkv_write_video_projection(s, pb, st);
1287 end_ebml_master(pb, subinfo);
1290 case AVMEDIA_TYPE_AUDIO:
1291 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1292 int64_t codecdelay = av_rescale_q(par->initial_padding,
1293 (AVRational){ 1, 48000 },
1294 (AVRational){ 1, 1000000000 });
1295 if (codecdelay < 0) {
1296 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1297 return AVERROR(EINVAL);
1299 // track->ts_offset = av_rescale_q(par->initial_padding,
1300 // (AVRational){ 1, par->sample_rate },
1303 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1305 if (par->codec_id == AV_CODEC_ID_OPUS)
1306 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1308 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1311 // no mkv-specific ID, use ACM mode
1312 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1314 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 6 + 4 * 9);
1315 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1317 track->sample_rate_offset = avio_tell(pb);
1318 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1319 if (output_sample_rate)
1320 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1322 bit_depth = av_get_bits_per_sample(par->codec_id);
1323 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1324 if (par->bits_per_raw_sample)
1325 bit_depth = par->bits_per_raw_sample;
1327 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1330 bit_depth = par->bits_per_coded_sample;
1332 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1333 end_ebml_master(pb, subinfo);
1336 case AVMEDIA_TYPE_SUBTITLE:
1338 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1339 return AVERROR(ENOSYS);
1342 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1343 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1345 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1348 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1349 return AVERROR(EINVAL);
1352 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1353 track->codecpriv_offset = avio_tell(pb);
1354 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1359 end_ebml_master(pb, track_master);
1364 static int mkv_write_tracks(AVFormatContext *s)
1366 MatroskaMuxContext *mkv = s->priv_data;
1367 AVIOContext *pb = s->pb;
1368 int i, ret, video_default_idx, audio_default_idx, subtitle_default_idx;
1370 if (mkv->nb_attachments == s->nb_streams)
1373 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1375 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1379 if (mkv->default_mode != DEFAULT_MODE_PASSTHROUGH) {
1380 int video_idx, audio_idx, subtitle_idx;
1382 video_idx = video_default_idx =
1383 audio_idx = audio_default_idx =
1384 subtitle_idx = subtitle_default_idx = -1;
1386 for (i = s->nb_streams - 1; i >= 0; i--) {
1387 AVStream *st = s->streams[i];
1389 switch (st->codecpar->codec_type) {
1390 #define CASE(type, variable) \
1391 case AVMEDIA_TYPE_ ## type: \
1392 variable ## _idx = i; \
1393 if (st->disposition & AV_DISPOSITION_DEFAULT) \
1394 variable ## _default_idx = i; \
1398 CASE(SUBTITLE, subtitle)
1403 video_default_idx = FFMAX(video_default_idx, video_idx);
1404 audio_default_idx = FFMAX(audio_default_idx, audio_idx);
1405 if (mkv->default_mode != DEFAULT_MODE_INFER_NO_SUBS)
1406 subtitle_default_idx = FFMAX(subtitle_default_idx, subtitle_idx);
1408 for (i = 0; i < s->nb_streams; i++) {
1409 AVStream *st = s->streams[i];
1410 int is_default = mkv->default_mode == DEFAULT_MODE_PASSTHROUGH ?
1411 st->disposition & AV_DISPOSITION_DEFAULT :
1412 i == video_default_idx || i == audio_default_idx ||
1413 i == subtitle_default_idx;
1414 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1415 mkv->tracks_bc, is_default);
1420 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1421 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1422 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1424 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1429 static int mkv_write_chapters(AVFormatContext *s)
1431 MatroskaMuxContext *mkv = s->priv_data;
1432 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1433 ebml_master editionentry;
1434 AVRational scale = {1, 1E9};
1437 if (!s->nb_chapters || mkv->wrote_chapters)
1440 for (i = 0; i < s->nb_chapters; i++)
1441 if (!s->chapters[i]->id) {
1442 mkv->chapter_id_offset = 1;
1446 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1448 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1452 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1453 if (mkv->mode != MODE_WEBM)
1454 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1456 for (i = 0; i < s->nb_chapters; i++) {
1457 ebml_master chapteratom, chapterdisplay;
1458 const AVChapter *c = s->chapters[i];
1459 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1460 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1461 const AVDictionaryEntry *t;
1462 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1463 av_log(s, AV_LOG_ERROR,
1464 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1465 chapterstart, chapterend);
1466 ffio_free_dyn_buf(&dyn_cp);
1467 return AVERROR_INVALIDDATA;
1470 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1471 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1472 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1473 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1474 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1475 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1476 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1477 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1478 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1479 end_ebml_master(dyn_cp, chapterdisplay);
1481 end_ebml_master(dyn_cp, chapteratom);
1483 end_ebml_master(dyn_cp, editionentry);
1484 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1486 mkv->wrote_chapters = 1;
1490 static int mkv_write_simpletag(AVIOContext *pb, const AVDictionaryEntry *t)
1492 uint8_t *key = av_strdup(t->key);
1494 const uint8_t *lang = NULL;
1498 return AVERROR(ENOMEM);
1500 if ((p = strrchr(p, '-')) &&
1501 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1508 else if (*p >= 'a' && *p <= 'z')
1513 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1514 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1516 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1517 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1518 end_ebml_master(pb, tag);
1524 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1525 uint64_t uid, ebml_master *tag)
1528 MatroskaMuxContext *mkv = s->priv_data;
1529 ebml_master targets;
1532 if (!mkv->tags_bc) {
1533 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1535 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1541 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1542 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 4 + 1 + 8);
1544 put_ebml_uid(pb, elementid, uid);
1545 end_ebml_master(pb, targets);
1549 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1551 return av_strcasecmp(name, "title") &&
1552 av_strcasecmp(name, "stereo_mode") &&
1553 av_strcasecmp(name, "creation_time") &&
1554 av_strcasecmp(name, "encoding_tool") &&
1555 av_strcasecmp(name, "duration") &&
1556 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1557 av_strcasecmp(name, "language")) &&
1558 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1559 (av_strcasecmp(name, "filename") &&
1560 av_strcasecmp(name, "mimetype")));
1563 static int mkv_write_tag(AVFormatContext *s, const AVDictionary *m,
1564 uint32_t elementid, uint64_t uid, ebml_master *tag)
1566 MatroskaMuxContext *mkv = s->priv_data;
1567 const AVDictionaryEntry *t = NULL;
1571 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1575 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1576 if (mkv_check_tag_name(t->key, elementid)) {
1577 ret = mkv_write_simpletag(mkv->tags_bc, t);
1584 end_ebml_master(mkv->tags_bc, tag2);
1589 static int mkv_check_tag(const AVDictionary *m, uint32_t elementid)
1591 const AVDictionaryEntry *t = NULL;
1593 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1594 if (mkv_check_tag_name(t->key, elementid))
1600 static int mkv_write_tags(AVFormatContext *s)
1602 MatroskaMuxContext *mkv = s->priv_data;
1603 ebml_master tag, *tagp;
1606 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1608 if (mkv_check_tag(s->metadata, 0)) {
1609 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1614 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1615 for (i = 0; i < s->nb_streams; i++) {
1616 const AVStream *st = s->streams[i];
1617 mkv_track *track = &mkv->tracks[i];
1619 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1622 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1625 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1631 AVIOContext *pb = mkv->tags_bc;
1632 ebml_master simpletag;
1634 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG,
1636 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1637 track->duration_offset = avio_tell(pb);
1639 // Reserve space to write duration as a 20-byte string.
1640 // 2 (ebml id) + 1 (data size) + 20 (data)
1641 put_ebml_void(pb, 23);
1642 end_ebml_master(pb, simpletag);
1643 end_ebml_master(pb, tag);
1647 if (mkv->mode != MODE_WEBM) {
1648 for (i = 0; i < s->nb_chapters; i++) {
1649 AVChapter *ch = s->chapters[i];
1651 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1654 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1655 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1662 if (mkv->nb_attachments && mkv->mode != MODE_WEBM) {
1663 for (i = 0; i < s->nb_streams; i++) {
1664 const mkv_track *track = &mkv->tracks[i];
1665 const AVStream *st = s->streams[i];
1667 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1670 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1673 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1681 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1682 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1683 MATROSKA_ID_TAGS, &mkv->tags_pos);
1685 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1690 static int mkv_write_attachments(AVFormatContext *s)
1692 MatroskaMuxContext *mkv = s->priv_data;
1693 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1696 if (!mkv->nb_attachments)
1699 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1701 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1705 for (i = 0; i < s->nb_streams; i++) {
1706 const AVStream *st = s->streams[i];
1707 mkv_track *track = &mkv->tracks[i];
1708 ebml_master attached_file;
1709 const AVDictionaryEntry *t;
1710 const char *mimetype = NULL;
1712 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1715 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1717 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1718 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1719 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1720 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1721 return AVERROR(EINVAL);
1723 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1724 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1725 mimetype = t->value;
1726 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1727 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1728 if (desc && desc->mime_types) {
1729 mimetype = desc->mime_types[0];
1730 } else if (st->codecpar->codec_id == AV_CODEC_ID_TEXT)
1731 mimetype = "text/plain";
1734 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1735 "it cannot be deduced from the codec id.\n", i);
1736 return AVERROR(EINVAL);
1739 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1740 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1741 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1742 end_ebml_master(dyn_cp, attached_file);
1744 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1749 static int64_t get_metadata_duration(AVFormatContext *s)
1751 const AVDictionaryEntry *duration = av_dict_get(s->metadata, "DURATION",
1756 if (duration && (av_parse_time(&us, duration->value, 1) == 0) && us > 0) {
1757 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1761 for (unsigned i = 0; i < s->nb_streams; i++) {
1763 duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1765 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1766 max = FFMAX(max, us);
1769 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1773 static int mkv_write_header(AVFormatContext *s)
1775 MatroskaMuxContext *mkv = s->priv_data;
1776 AVIOContext *pb = s->pb;
1777 ebml_master ebml_header;
1778 const AVDictionaryEntry *tag;
1779 int ret, i, version = 2;
1780 int64_t creation_time;
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 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1795 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1796 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1797 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1798 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1799 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1800 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1801 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1802 end_ebml_master(pb, ebml_header);
1804 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1805 mkv->segment_offset = avio_tell(pb);
1807 // we write a seek head at the beginning to point to all other level
1808 // one elements (except Clusters).
1809 mkv_start_seekhead(mkv, pb);
1811 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1813 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1818 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1819 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1820 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1821 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1822 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1823 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1824 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1826 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1828 if (mkv->mode != MODE_WEBM)
1829 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1831 const char *ident = "Lavf";
1832 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1833 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1836 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1837 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1838 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1839 uint8_t date_utc_buf[8];
1840 AV_WB64(date_utc_buf, date_utc);
1841 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1844 // reserve space for the duration
1846 mkv->duration_offset = avio_tell(pb);
1847 if (!mkv->is_live) {
1848 int64_t metadata_duration = get_metadata_duration(s);
1850 if (s->duration > 0) {
1851 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1852 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1853 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1854 } else if (metadata_duration > 0) {
1855 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1856 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1857 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1859 put_ebml_void(pb, 11); // assumes double-precision float to be written
1862 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1863 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1864 MATROSKA_ID_INFO, &mkv->info_pos);
1866 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1869 ret = mkv_write_tracks(s);
1873 ret = mkv_write_chapters(s);
1877 if (mkv->mode != MODE_WEBM) {
1878 ret = mkv_write_attachments(s);
1883 /* Must come after mkv_write_chapters() because of chapter_id_offset */
1884 ret = mkv_write_tags(s);
1888 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) || mkv->is_live) {
1889 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1894 if (s->metadata_header_padding > 0) {
1895 if (s->metadata_header_padding == 1)
1896 s->metadata_header_padding++;
1897 put_ebml_void(pb, s->metadata_header_padding);
1900 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1901 mkv->cues_pos = avio_tell(pb);
1902 if (mkv->reserve_cues_space == 1)
1903 mkv->reserve_cues_space++;
1904 put_ebml_void(pb, mkv->reserve_cues_space);
1907 av_init_packet(&mkv->cur_audio_pkt);
1908 mkv->cur_audio_pkt.size = 0;
1909 mkv->cluster_pos = -1;
1911 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1912 // after 4k and on a keyframe
1913 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1914 if (mkv->cluster_time_limit < 0)
1915 mkv->cluster_time_limit = 5000;
1916 if (mkv->cluster_size_limit < 0)
1917 mkv->cluster_size_limit = 5 * 1024 * 1024;
1919 if (mkv->cluster_time_limit < 0)
1920 mkv->cluster_time_limit = 1000;
1921 if (mkv->cluster_size_limit < 0)
1922 mkv->cluster_size_limit = 32 * 1024;
1928 static int mkv_blockgroup_size(int pkt_size, int track_num_size)
1930 int size = pkt_size + track_num_size + 3;
1931 size += ebml_length_size(size);
1932 size += 2; // EBML ID for block and block duration
1933 size += 9; // max size of block duration incl. length field
1937 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1944 dst = av_malloc(srclen);
1946 return AVERROR(ENOMEM);
1948 while (srclen >= WV_HEADER_SIZE) {
1951 ret = ff_wv_parse_header(&header, src);
1954 src += WV_HEADER_SIZE;
1955 srclen -= WV_HEADER_SIZE;
1957 if (srclen < header.blocksize) {
1958 ret = AVERROR_INVALIDDATA;
1962 if (header.initial) {
1963 AV_WL32(dst + offset, header.samples);
1966 AV_WL32(dst + offset, header.flags);
1967 AV_WL32(dst + offset + 4, header.crc);
1970 if (!(header.initial && header.final)) {
1971 AV_WL32(dst + offset, header.blocksize);
1975 memcpy(dst + offset, src, header.blocksize);
1976 src += header.blocksize;
1977 srclen -= header.blocksize;
1978 offset += header.blocksize;
1990 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1991 uint32_t blockid, const AVPacket *pkt, int keyframe)
1993 MatroskaMuxContext *mkv = s->priv_data;
1994 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1995 mkv_track *track = &mkv->tracks[pkt->stream_index];
1996 uint8_t *data = NULL, *side_data = NULL;
1997 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1998 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1999 uint64_t additional_id;
2000 int64_t discard_padding = 0;
2001 unsigned track_number = track->track_num;
2002 ebml_master block_group, block_additions, block_more;
2004 ts += track->ts_offset;
2006 /* The following string is identical to the one in mkv_write_vtt_blocks
2007 * so that only one copy needs to exist in binaries. */
2008 av_log(s, AV_LOG_DEBUG,
2009 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2010 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2011 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2012 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2013 mkv->cluster_pos, track_number, keyframe != 0);
2015 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2016 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2017 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2018 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2019 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2020 /* extradata is Annex B, assume the bitstream is too and convert it */
2021 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2022 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2023 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2024 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2025 err = mkv_strip_wavpack(pkt->data, &data, &size);
2030 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2031 "a packet from stream %d.\n", pkt->stream_index);
2035 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2036 /* Matroska specification requires to remove the first QuickTime atom
2042 side_data = av_packet_get_side_data(pkt,
2043 AV_PKT_DATA_SKIP_SAMPLES,
2045 if (side_data && side_data_size >= 10) {
2046 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2047 (AVRational){1, par->sample_rate},
2048 (AVRational){1, 1000000000});
2051 side_data = av_packet_get_side_data(pkt,
2052 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2055 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2056 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2060 side_data_size -= 8;
2064 if (side_data_size || discard_padding) {
2065 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2066 blockid = MATROSKA_ID_BLOCK;
2069 put_ebml_id(pb, blockid);
2070 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2071 put_ebml_num(pb, track_number, track->track_num_size);
2072 avio_wb16(pb, ts - mkv->cluster_pts);
2073 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2074 avio_write(pb, data + offset, size);
2075 if (data != pkt->data)
2078 if (blockid == MATROSKA_ID_BLOCK && !keyframe)
2079 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2080 track->last_timestamp = ts;
2082 if (discard_padding)
2083 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2085 if (side_data_size) {
2086 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2087 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2088 /* Until dbc50f8a our demuxer used a wrong default value
2089 * of BlockAddID, so we write it unconditionally. */
2090 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2091 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2092 side_data, side_data_size);
2093 end_ebml_master(pb, block_more);
2094 end_ebml_master(pb, block_additions);
2096 if (side_data_size || discard_padding)
2097 end_ebml_master(pb, block_group);
2102 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, const AVPacket *pkt)
2104 MatroskaMuxContext *mkv = s->priv_data;
2105 mkv_track *track = &mkv->tracks[pkt->stream_index];
2106 ebml_master blockgroup;
2107 int id_size, settings_size, size;
2108 uint8_t *id, *settings;
2109 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2110 const int flags = 0;
2113 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2117 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2120 size = id_size + 1 + settings_size + 1 + pkt->size;
2122 /* The following string is identical to the one in mkv_write_block so that
2123 * only one copy needs to exist in binaries. */
2124 av_log(s, AV_LOG_DEBUG,
2125 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2126 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2127 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2128 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2129 mkv->cluster_pos, track->track_num, 1);
2131 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2132 mkv_blockgroup_size(size, track->track_num_size));
2134 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2135 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2136 put_ebml_num(pb, track->track_num, track->track_num_size);
2137 avio_wb16(pb, ts - mkv->cluster_pts);
2139 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2141 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2142 end_ebml_master(pb, blockgroup);
2144 return pkt->duration;
2147 static void mkv_end_cluster(AVFormatContext *s)
2149 MatroskaMuxContext *mkv = s->priv_data;
2151 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2152 if (!mkv->have_video) {
2153 for (unsigned i = 0; i < s->nb_streams; i++)
2154 mkv->tracks[i].has_cue = 0;
2156 mkv->cluster_pos = -1;
2157 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2160 static int mkv_check_new_extra_data(AVFormatContext *s, const AVPacket *pkt)
2162 MatroskaMuxContext *mkv = s->priv_data;
2163 mkv_track *track = &mkv->tracks[pkt->stream_index];
2164 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2166 int side_data_size = 0, ret;
2168 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2171 switch (par->codec_id) {
2172 case AV_CODEC_ID_AAC:
2173 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2174 int filler, output_sample_rate = 0;
2175 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2176 &output_sample_rate);
2179 if (!output_sample_rate)
2180 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2181 ret = ff_alloc_extradata(par, side_data_size);
2184 memcpy(par->extradata, side_data, side_data_size);
2185 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2186 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2187 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2189 put_ebml_void(mkv->tracks_bc, filler);
2190 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2191 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2192 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2193 } else if (!par->extradata_size && !track->sample_rate) {
2194 // No extradata (codecpar or packet side data).
2195 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2196 return AVERROR(EINVAL);
2199 case AV_CODEC_ID_FLAC:
2200 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2201 uint8_t *old_extradata = par->extradata;
2202 if (side_data_size != par->extradata_size) {
2203 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2205 return AVERROR(EINVAL);
2207 par->extradata = side_data;
2208 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2209 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2210 par->extradata = old_extradata;
2213 // FIXME: Remove the following once libaom starts propagating extradata during init()
2214 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2215 case AV_CODEC_ID_AV1:
2216 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2217 !par->extradata_size) {
2218 AVIOContext *dyn_cp;
2221 ret = avio_open_dyn_buf(&dyn_cp);
2224 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2225 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2226 if (!codecpriv_size) {
2228 return AVERROR_INVALIDDATA;
2230 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2231 // Do not write the OBUs as we don't have space saved for them
2232 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2234 ret = ff_alloc_extradata(par, side_data_size);
2237 memcpy(par->extradata, side_data, side_data_size);
2238 } else if (!par->extradata_size)
2239 return AVERROR_INVALIDDATA;
2243 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2250 static int mkv_write_packet_internal(AVFormatContext *s, const AVPacket *pkt)
2252 MatroskaMuxContext *mkv = s->priv_data;
2254 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2255 mkv_track *track = &mkv->tracks[pkt->stream_index];
2256 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2257 int duration = pkt->duration;
2259 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2260 int64_t relative_packet_pos;
2262 if (ts == AV_NOPTS_VALUE) {
2263 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2264 return AVERROR(EINVAL);
2266 ts += track->ts_offset;
2268 if (mkv->cluster_pos != -1) {
2269 int64_t cluster_time = ts - mkv->cluster_pts;
2270 if ((int16_t)cluster_time != cluster_time) {
2272 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2276 if (mkv->cluster_pos == -1) {
2277 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2280 mkv->cluster_pos = avio_tell(s->pb);
2281 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2282 mkv->cluster_pts = FFMAX(0, ts);
2283 av_log(s, AV_LOG_DEBUG,
2284 "Starting new cluster with timestamp "
2285 "%" PRId64 " at offset %" PRId64 " bytes\n",
2286 mkv->cluster_pts, mkv->cluster_pos);
2288 pb = mkv->cluster_bc;
2290 relative_packet_pos = avio_tell(pb);
2292 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2293 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2296 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && keyframe &&
2297 (par->codec_type == AVMEDIA_TYPE_VIDEO || !mkv->have_video && !track->has_cue)) {
2298 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2299 mkv->cluster_pos, relative_packet_pos, -1);
2305 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2306 duration = mkv_write_vtt_blocks(s, pb, pkt);
2308 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2309 mkv_blockgroup_size(pkt->size,
2310 track->track_num_size));
2312 #if FF_API_CONVERGENCE_DURATION
2313 FF_DISABLE_DEPRECATION_WARNINGS
2314 /* For backward compatibility, prefer convergence_duration. */
2315 if (pkt->convergence_duration > 0) {
2316 duration = pkt->convergence_duration;
2318 FF_ENABLE_DEPRECATION_WARNINGS
2320 /* All subtitle blocks are considered to be keyframes. */
2321 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2322 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2323 end_ebml_master(pb, blockgroup);
2326 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2327 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2328 mkv->cluster_pos, relative_packet_pos, duration);
2334 mkv->duration = FFMAX(mkv->duration, ts + duration);
2335 track->duration = FFMAX(track->duration, ts + duration);
2340 static int mkv_write_packet(AVFormatContext *s, const AVPacket *pkt)
2342 MatroskaMuxContext *mkv = s->priv_data;
2343 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2344 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2346 int64_t cluster_time;
2348 int start_new_cluster;
2350 ret = mkv_check_new_extra_data(s, pkt);
2354 if (mkv->cluster_pos != -1) {
2355 if (mkv->tracks[pkt->stream_index].write_dts)
2356 cluster_time = pkt->dts - mkv->cluster_pts;
2358 cluster_time = pkt->pts - mkv->cluster_pts;
2359 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2361 cluster_size = avio_tell(mkv->cluster_bc);
2363 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2364 // WebM DASH specification states that the first block of
2365 // every Cluster has to be a key frame. So for DASH video,
2366 // we only create a Cluster on seeing key frames.
2367 start_new_cluster = keyframe;
2368 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2369 cluster_time > mkv->cluster_time_limit) {
2370 // For DASH audio, we create a Cluster based on cluster_time_limit.
2371 start_new_cluster = 1;
2372 } else if (!mkv->is_dash &&
2373 (cluster_size > mkv->cluster_size_limit ||
2374 cluster_time > mkv->cluster_time_limit ||
2375 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2376 cluster_size > 4 * 1024))) {
2377 start_new_cluster = 1;
2379 start_new_cluster = 0;
2381 if (start_new_cluster)
2385 if (!mkv->cluster_pos)
2386 avio_write_marker(s->pb,
2387 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2388 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2390 // check if we have an audio packet cached
2391 if (mkv->cur_audio_pkt.size > 0) {
2392 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2393 av_packet_unref(&mkv->cur_audio_pkt);
2395 av_log(s, AV_LOG_ERROR,
2396 "Could not write cached audio packet ret:%d\n", ret);
2401 // buffer an audio packet to ensure the packet containing the video
2402 // keyframe's timecode is contained in the same cluster for WebM
2403 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2405 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2407 ret = mkv_write_packet_internal(s, pkt);
2411 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2413 MatroskaMuxContext *mkv = s->priv_data;
2416 if (mkv->cluster_pos != -1) {
2418 av_log(s, AV_LOG_DEBUG,
2419 "Flushing cluster at offset %" PRIu64 " bytes\n",
2424 return mkv_write_packet(s, pkt);
2427 static int mkv_write_trailer(AVFormatContext *s)
2429 MatroskaMuxContext *mkv = s->priv_data;
2430 AVIOContext *pb = s->pb;
2433 // check if we have an audio packet cached
2434 if (mkv->cur_audio_pkt.size > 0) {
2435 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2437 av_log(s, AV_LOG_ERROR,
2438 "Could not write cached audio packet ret:%d\n", ret);
2443 if (mkv->cluster_pos != -1) {
2444 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2445 MATROSKA_ID_CLUSTER, 0, 0);
2448 ret = mkv_write_chapters(s);
2453 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2454 int64_t endpos, ret64;
2456 endpos = avio_tell(pb);
2458 if (mkv->cues.num_entries) {
2459 AVIOContext *cues = NULL;
2461 int64_t cuespos = endpos;
2462 int length_size = 0;
2464 ret = start_ebml_master_crc32(&cues, mkv);
2468 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2469 mkv->tracks, s->nb_streams);
2471 ffio_free_dyn_buf(&cues);
2475 if (mkv->reserve_cues_space) {
2476 size = avio_tell(cues);
2477 length_size = ebml_length_size(size);
2478 size += 4 + length_size;
2479 if (mkv->reserve_cues_space < size) {
2480 av_log(s, AV_LOG_WARNING,
2481 "Insufficient space reserved for Cues: "
2482 "%d < %"PRIu64". No Cues will be output.\n",
2483 mkv->reserve_cues_space, size);
2484 mkv->reserve_cues_space = -1;
2485 ffio_free_dyn_buf(&cues);
2488 cuespos = mkv->cues_pos;
2489 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2490 ffio_free_dyn_buf(&cues);
2493 if (mkv->reserve_cues_space == size + 1) {
2494 /* There is no way to reserve a single byte because
2495 * the minimal size of an EBML Void element is 2
2496 * (1 byte ID, 1 byte length field). This problem
2497 * is solved by writing the Cues' length field on
2498 * one byte more than necessary. */
2504 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2505 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2507 if (mkv->reserve_cues_space) {
2508 if (size < mkv->reserve_cues_space)
2509 put_ebml_void(pb, mkv->reserve_cues_space - size);
2511 endpos = avio_tell(pb);
2515 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2519 // update the duration
2520 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2521 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2522 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2523 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2525 if (mkv->tracks_bc) {
2526 // write Tracks master
2527 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2528 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv,
2529 MATROSKA_ID_TRACKS, 0, 0);
2532 // update stream durations
2535 for (i = 0; i < s->nb_streams; ++i) {
2536 const AVStream *st = s->streams[i];
2537 const mkv_track *track = &mkv->tracks[i];
2539 if (track->duration_offset > 0) {
2540 double duration_sec = track->duration * av_q2d(st->time_base);
2541 char duration_string[20] = "";
2543 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2546 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2548 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2549 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2550 fmod(duration_sec, 60));
2552 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2556 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2557 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2560 avio_seek(pb, endpos, SEEK_SET);
2564 end_ebml_master(pb, mkv->segment);
2566 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2569 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2572 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2573 if (ff_mkv_codec_tags[i].id == codec_id)
2576 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2577 enum AVMediaType type = avcodec_get_type(codec_id);
2578 // mkv theoretically supports any video/audio through VFW/ACM
2579 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2586 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2589 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2590 if (ff_webm_codec_tags[i].id == codec_id)
2596 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2601 uid = (uint64_t)av_lfg_get(c) << 32;
2602 uid |= av_lfg_get(c);
2605 for (k = 0; k < i; k++) {
2606 if (tracks[k].uid == uid)
2614 static int mkv_init(struct AVFormatContext *s)
2616 MatroskaMuxContext *mkv = s->priv_data;
2618 unsigned nb_tracks = 0;
2621 for (i = 0; i < s->nb_streams; i++) {
2622 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2623 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2624 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2625 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2626 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2627 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2628 av_log(s, AV_LOG_ERROR,
2629 "The Matroska muxer does not yet support muxing %s\n",
2630 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2631 return AVERROR_PATCHWELCOME;
2635 if (s->avoid_negative_ts < 0) {
2636 s->avoid_negative_ts = 1;
2637 s->internal->avoid_negative_ts_use_pts = 1;
2640 if (!strcmp(s->oformat->name, "webm")) {
2641 mkv->mode = MODE_WEBM;
2644 mkv->mode = MODE_MATROSKAv2;
2646 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2648 return AVERROR(ENOMEM);
2650 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2651 av_lfg_init(&c, av_get_random_seed());
2653 // Calculate the SegmentUID now in order not to waste our random seed.
2654 for (i = 0; i < 4; i++)
2655 mkv->segment_uid[i] = av_lfg_get(&c);
2658 for (i = 0; i < s->nb_streams; i++) {
2659 AVStream *st = s->streams[i];
2660 mkv_track *track = &mkv->tracks[i];
2662 if (s->flags & AVFMT_FLAG_BITEXACT) {
2665 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2668 // ms precision is the de-facto standard timescale for mkv files
2669 avpriv_set_pts_info(st, 64, 1, 1000);
2671 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
2672 if (mkv->mode == MODE_WEBM) {
2673 av_log(s, AV_LOG_WARNING, "Stream %d will be ignored "
2674 "as WebM doesn't support attachments.\n", i);
2676 mkv->nb_attachments++;
2681 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2682 track->track_num_size = ebml_num_size(track->track_num);
2685 if (mkv->is_dash && nb_tracks != 1)
2686 return AVERROR(EINVAL);
2691 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2694 AVStream *st = s->streams[pkt->stream_index];
2696 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2697 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2698 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2699 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2700 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2706 static const AVCodecTag additional_audio_tags[] = {
2707 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2708 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2709 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2710 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2711 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2712 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2713 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2714 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2715 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2716 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2717 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2718 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2719 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2722 static const AVCodecTag additional_video_tags[] = {
2723 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2724 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2725 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2726 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2729 static const AVCodecTag additional_subtitle_tags[] = {
2730 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2731 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2732 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2733 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2736 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2737 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2738 static const AVOption options[] = {
2739 { "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 },
2740 { "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 },
2741 { "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 },
2742 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2743 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
2744 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2745 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2746 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2747 { "default_mode", "Controls how a track's FlagDefault is inferred", OFFSET(default_mode), AV_OPT_TYPE_INT, { .i64 = DEFAULT_MODE_INFER }, DEFAULT_MODE_INFER, DEFAULT_MODE_PASSTHROUGH, FLAGS, "default_mode" },
2748 { "infer", "For each track type, mark the first track of disposition default as default; if none exists, mark the first track as default.", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_INFER }, 0, 0, FLAGS, "default_mode" },
2749 { "infer_no_subs", "For each track type, mark the first track of disposition default as default; for audio and video: if none exists, mark the first track as default.", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_INFER_NO_SUBS }, 0, 0, FLAGS, "default_mode" },
2750 { "passthrough", "Use the disposition flag as-is", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_PASSTHROUGH }, 0, 0, FLAGS, "default_mode" },
2754 #if CONFIG_MATROSKA_MUXER
2755 static const AVClass matroska_class = {
2756 .class_name = "matroska muxer",
2757 .item_name = av_default_item_name,
2759 .version = LIBAVUTIL_VERSION_INT,
2762 AVOutputFormat ff_matroska_muxer = {
2764 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2765 .mime_type = "video/x-matroska",
2766 .extensions = "mkv",
2767 .priv_data_size = sizeof(MatroskaMuxContext),
2768 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2769 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2770 .video_codec = CONFIG_LIBX264_ENCODER ?
2771 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2773 .deinit = mkv_deinit,
2774 .write_header = mkv_write_header,
2775 .write_packet = mkv_write_flush_packet,
2776 .write_trailer = mkv_write_trailer,
2777 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2778 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2779 .codec_tag = (const AVCodecTag* const []){
2780 ff_codec_bmp_tags, ff_codec_wav_tags,
2781 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2783 .subtitle_codec = AV_CODEC_ID_ASS,
2784 .query_codec = mkv_query_codec,
2785 .check_bitstream = mkv_check_bitstream,
2786 .priv_class = &matroska_class,
2790 #if CONFIG_WEBM_MUXER
2791 static const AVClass webm_class = {
2792 .class_name = "webm muxer",
2793 .item_name = av_default_item_name,
2795 .version = LIBAVUTIL_VERSION_INT,
2798 AVOutputFormat ff_webm_muxer = {
2800 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2801 .mime_type = "video/webm",
2802 .extensions = "webm",
2803 .priv_data_size = sizeof(MatroskaMuxContext),
2804 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2805 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2806 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2808 .deinit = mkv_deinit,
2809 .write_header = mkv_write_header,
2810 .write_packet = mkv_write_flush_packet,
2811 .write_trailer = mkv_write_trailer,
2812 .query_codec = webm_query_codec,
2813 .check_bitstream = mkv_check_bitstream,
2814 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2815 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2816 .priv_class = &webm_class,
2820 #if CONFIG_MATROSKA_AUDIO_MUXER
2821 static const AVClass mka_class = {
2822 .class_name = "matroska audio muxer",
2823 .item_name = av_default_item_name,
2825 .version = LIBAVUTIL_VERSION_INT,
2827 AVOutputFormat ff_matroska_audio_muxer = {
2829 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2830 .mime_type = "audio/x-matroska",
2831 .extensions = "mka",
2832 .priv_data_size = sizeof(MatroskaMuxContext),
2833 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2834 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2835 .video_codec = AV_CODEC_ID_NONE,
2837 .deinit = mkv_deinit,
2838 .write_header = mkv_write_header,
2839 .write_packet = mkv_write_flush_packet,
2840 .write_trailer = mkv_write_trailer,
2841 .check_bitstream = mkv_check_bitstream,
2842 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2844 .codec_tag = (const AVCodecTag* const []){
2845 ff_codec_wav_tags, additional_audio_tags, 0
2847 .priv_class = &mka_class,