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 typedef struct ebml_master {
61 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
62 int sizebytes; ///< how many bytes were reserved for the size
65 typedef struct mkv_seekhead_entry {
70 typedef struct mkv_seekhead {
72 int64_t segment_offset; ///< the file offset to the beginning of the segment
73 int reserved_size; ///< -1 if appending to file
75 mkv_seekhead_entry *entries;
79 typedef struct mkv_cuepoint {
83 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
84 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
85 int64_t duration; ///< duration of the block according to time base
88 typedef struct mkv_cues {
89 int64_t segment_offset;
90 mkv_cuepoint *entries;
94 typedef struct mkv_track {
98 int64_t sample_rate_offset;
99 int64_t last_timestamp;
101 int64_t duration_offset;
102 int64_t codecpriv_offset;
106 typedef struct mkv_attachment {
111 typedef struct mkv_attachments {
112 mkv_attachment *entries;
116 #define MODE_MATROSKAv2 0x01
117 #define MODE_WEBM 0x02
119 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
120 * range 1 to 126 (inclusive) */
121 #define MAX_TRACKS 126
123 typedef struct MatroskaMuxContext {
124 const AVClass *class;
126 AVIOContext *tags_bc;
128 AVIOContext *info_bc;
130 AVIOContext *tracks_bc;
133 int64_t segment_offset;
134 AVIOContext *cluster_bc;
135 int64_t cluster_pos; ///< file offset of the current cluster
137 int64_t duration_offset;
139 mkv_seekhead *seekhead;
142 mkv_attachments *attachments;
144 AVPacket cur_audio_pkt;
146 int have_attachments;
149 int reserve_cues_space;
150 int cluster_size_limit;
152 int64_t cluster_time_limit;
154 int dash_track_number;
158 uint32_t chapter_id_offset;
162 } MatroskaMuxContext;
164 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
165 * 8 byte for "matroska" doctype string */
166 #define MAX_EBML_HEADER_SIZE 35
168 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
169 * offset, 4 bytes for target EBML ID */
170 #define MAX_SEEKENTRY_SIZE 21
172 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 3 8-byte uint max
173 * and one 1-byte uint for the track number (this assumes MAX_TRACKS to be <= 255) */
174 #define MAX_CUETRACKPOS_SIZE 35
176 /** per-cuepoint - 1 1-byte EBML ID, 1 1-byte EBML size, 8-byte uint max */
177 #define MAX_CUEPOINT_CONTENT_SIZE(num_tracks) 10 + MAX_CUETRACKPOS_SIZE * num_tracks
179 /** Seek preroll value for opus */
180 #define OPUS_SEEK_PREROLL 80000000
182 static int ebml_id_size(uint32_t id)
184 return (av_log2(id + 1) - 1) / 7 + 1;
187 static void put_ebml_id(AVIOContext *pb, uint32_t id)
189 int i = ebml_id_size(id);
191 avio_w8(pb, (uint8_t)(id >> (i * 8)));
195 * Write an EBML size meaning "unknown size".
197 * @param bytes The number of bytes the size should occupy (maximum: 8).
199 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
201 av_assert0(bytes <= 8);
202 avio_w8(pb, 0x1ff >> bytes);
203 ffio_fill(pb, 0xff, bytes - 1);
207 * Calculate how many bytes are needed to represent a given number in EBML.
209 static int ebml_num_size(uint64_t num)
212 while ((num + 1) >> bytes * 7)
218 * Write a number in EBML variable length format.
220 * @param bytes The number of bytes that need to be used to write the number.
221 * If zero, any number of bytes can be used.
223 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
225 int i, needed_bytes = ebml_num_size(num);
227 // sizes larger than this are currently undefined in EBML
228 av_assert0(num < (1ULL << 56) - 1);
231 // don't care how many bytes are used, so use the min
232 bytes = needed_bytes;
233 // the bytes needed to write the given size would exceed the bytes
234 // that we need to use, so write unknown size. This shouldn't happen.
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);
401 av_freep(&mkv->seekhead->entries);
402 av_freep(&mkv->seekhead);
405 av_freep(&mkv->cues->entries);
406 av_freep(&mkv->cues);
408 if (mkv->attachments) {
409 av_freep(&mkv->attachments->entries);
410 av_freep(&mkv->attachments);
412 av_freep(&mkv->tracks);
416 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
417 * elements. If a maximum number of elements is specified, enough space
418 * will be reserved at the current file location to write a seek head of
421 * @param segment_offset The absolute offset to the position in the file
422 * where the segment begins.
423 * @param numelements The maximum number of elements that will be indexed
424 * by this seek head, 0 if unlimited.
426 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
429 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
433 new_seekhead->segment_offset = segment_offset;
435 if (numelements > 0) {
436 new_seekhead->filepos = avio_tell(pb);
437 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
438 // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee
439 // that an EBML void element will fit afterwards
440 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19;
441 new_seekhead->max_entries = numelements;
442 put_ebml_void(pb, new_seekhead->reserved_size);
447 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, uint32_t elementid, uint64_t filepos)
449 mkv_seekhead_entry *entries = seekhead->entries;
451 // don't store more elements than we reserved space for
452 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
455 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
457 return AVERROR(ENOMEM);
458 seekhead->entries = entries;
460 seekhead->entries[seekhead->num_entries].elementid = elementid;
461 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
467 * Write the seek head to the file and free it. If a maximum number of
468 * elements was specified to mkv_start_seekhead(), the seek head will
469 * be written at the location reserved for it. Otherwise, it is written
470 * at the current location in the file.
472 * @return The file offset where the seekhead was written,
473 * -1 if an error occurred.
475 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
478 mkv_seekhead *seekhead = mkv->seekhead;
479 ebml_master seekentry;
483 currentpos = avio_tell(pb);
485 if (seekhead->reserved_size > 0) {
486 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
492 if (start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD) < 0) {
497 for (i = 0; i < seekhead->num_entries; i++) {
498 mkv_seekhead_entry *entry = &seekhead->entries[i];
500 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
502 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
503 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
504 put_ebml_id(dyn_cp, entry->elementid);
506 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
507 end_ebml_master(dyn_cp, seekentry);
509 end_ebml_master_crc32(pb, &dyn_cp, mkv);
511 if (seekhead->reserved_size > 0) {
512 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
513 put_ebml_void(pb, remaining);
514 avio_seek(pb, currentpos, SEEK_SET);
516 currentpos = seekhead->filepos;
519 av_freep(&mkv->seekhead->entries);
520 av_freep(&mkv->seekhead);
525 static mkv_cues *mkv_start_cues(int64_t segment_offset)
527 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
531 cues->segment_offset = segment_offset;
535 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
536 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
538 mkv_cuepoint *entries = cues->entries;
543 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
545 return AVERROR(ENOMEM);
546 cues->entries = entries;
548 cues->entries[cues->num_entries].pts = ts;
549 cues->entries[cues->num_entries].stream_idx = stream;
550 cues->entries[cues->num_entries].tracknum = tracknum;
551 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
552 cues->entries[cues->num_entries].relative_pos = relative_pos;
553 cues->entries[cues->num_entries++].duration = duration;
558 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
560 MatroskaMuxContext *mkv = s->priv_data;
561 AVIOContext *dyn_cp, *pb = s->pb;
565 currentpos = avio_tell(pb);
566 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
570 for (i = 0; i < cues->num_entries; i++) {
571 ebml_master cuepoint, track_positions;
572 mkv_cuepoint *entry = &cues->entries[i];
573 uint64_t pts = entry->pts;
576 // Calculate the number of entries, so we know the element size
577 for (j = 0; j < num_tracks; j++)
578 tracks[j].has_cue = 0;
579 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
580 int idx = entry[j].stream_idx;
582 av_assert0(idx >= 0 && idx < num_tracks);
583 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
585 tracks[idx].has_cue = 1;
589 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_CONTENT_SIZE(ctp_nb));
590 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
592 // put all the entries from different tracks that have the exact same
593 // timestamp into the same CuePoint
594 for (j = 0; j < num_tracks; j++)
595 tracks[j].has_cue = 0;
596 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
597 int idx = entry[j].stream_idx;
599 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
601 tracks[idx].has_cue = 1;
602 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
603 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
604 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
605 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
606 if (entry[j].duration != -1)
607 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
608 end_ebml_master(dyn_cp, track_positions);
611 end_ebml_master(dyn_cp, cuepoint);
613 end_ebml_master_crc32(pb, &dyn_cp, mkv);
618 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
620 const uint8_t *header_start[3];
622 int first_header_size;
625 if (par->codec_id == AV_CODEC_ID_VORBIS)
626 first_header_size = 30;
628 first_header_size = 42;
630 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
631 first_header_size, header_start, header_len) < 0) {
632 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
636 avio_w8(pb, 2); // number packets - 1
637 for (j = 0; j < 2; j++) {
638 put_xiph_size(pb, header_len[j]);
640 for (j = 0; j < 3; j++)
641 avio_write(pb, header_start[j], header_len[j]);
646 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
648 if (par->extradata && par->extradata_size == 2)
649 avio_write(pb, par->extradata, 2);
651 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
655 static int put_flac_codecpriv(AVFormatContext *s,
656 AVIOContext *pb, AVCodecParameters *par)
658 int write_comment = (par->channel_layout &&
659 !(par->channel_layout & ~0x3ffffULL) &&
660 !ff_flac_is_native_layout(par->channel_layout));
661 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
668 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
669 "Lavf" : LIBAVFORMAT_IDENT;
670 AVDictionary *dict = NULL;
671 uint8_t buf[32], *data, *p;
674 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
675 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
677 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
678 if (len >= ((1<<24) - 4)) {
680 return AVERROR(EINVAL);
683 data = av_malloc(len + 4);
686 return AVERROR(ENOMEM);
690 AV_WB24(data + 1, len);
693 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
695 avio_write(pb, data, len + 4);
704 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
705 int *sample_rate, int *output_sample_rate)
707 MPEG4AudioConfig mp4ac;
710 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
711 /* Don't abort if the failure is because of missing extradata. Assume in that
712 * case a bitstream filter will provide the muxer with the extradata in the
714 * Abort however if s->pb is not seekable, as we would not be able to seek back
715 * to write the sample rate elements once the extradata shows up, anyway. */
716 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
717 av_log(s, AV_LOG_ERROR,
718 "Error parsing AAC extradata, unable to determine samplerate.\n");
719 return AVERROR(EINVAL);
723 /* This will only happen when this function is called while writing the
724 * header and no extradata is available. The space for this element has
725 * to be reserved for when this function is called again after the
726 * extradata shows up in the first packet, as there's no way to know if
727 * output_sample_rate will be different than sample_rate or not. */
728 *output_sample_rate = *sample_rate;
730 *sample_rate = mp4ac.sample_rate;
731 *output_sample_rate = mp4ac.ext_sample_rate;
736 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
737 AVCodecParameters *par,
740 switch (par->codec_id) {
741 case AV_CODEC_ID_VORBIS:
742 case AV_CODEC_ID_THEORA:
743 return put_xiph_codecpriv(s, dyn_cp, par);
744 case AV_CODEC_ID_FLAC:
745 return put_flac_codecpriv(s, dyn_cp, par);
746 case AV_CODEC_ID_WAVPACK:
747 return put_wv_codecpriv(dyn_cp, par);
748 case AV_CODEC_ID_H264:
749 return ff_isom_write_avcc(dyn_cp, par->extradata,
750 par->extradata_size);
751 case AV_CODEC_ID_HEVC:
752 ff_isom_write_hvcc(dyn_cp, par->extradata,
753 par->extradata_size, 0);
755 case AV_CODEC_ID_AV1:
756 if (par->extradata_size)
757 return ff_isom_write_av1c(dyn_cp, par->extradata,
758 par->extradata_size);
760 put_ebml_void(pb, 4 + 3);
762 case AV_CODEC_ID_ALAC:
763 if (par->extradata_size < 36) {
764 av_log(s, AV_LOG_ERROR,
765 "Invalid extradata found, ALAC expects a 36-byte "
767 return AVERROR_INVALIDDATA;
769 avio_write(dyn_cp, par->extradata + 12,
770 par->extradata_size - 12);
772 case AV_CODEC_ID_AAC:
773 if (par->extradata_size)
774 avio_write(dyn_cp, par->extradata, par->extradata_size);
776 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
779 if (par->codec_id == AV_CODEC_ID_PRORES &&
780 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
781 avio_wl32(dyn_cp, par->codec_tag);
782 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
783 avio_write(dyn_cp, par->extradata, par->extradata_size);
789 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
790 AVCodecParameters *par,
791 int native_id, int qt_id)
795 int ret, codecpriv_size;
797 ret = avio_open_dyn_buf(&dyn_cp);
802 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
803 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
806 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
808 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
809 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
812 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
813 avio_wl32(dyn_cp, par->codec_tag);
814 for(i = 0; i < 0x5a - 8; i++)
817 avio_write(dyn_cp, par->extradata, par->extradata_size);
819 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
820 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
821 avcodec_get_name(par->codec_id));
824 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
826 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
827 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
828 avcodec_get_name(par->codec_id));
829 ret = AVERROR(EINVAL);
832 ff_put_bmp_header(dyn_cp, par, 0, 0);
834 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
836 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
838 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
839 avcodec_get_name(par->codec_id));
840 ret = AVERROR(EINVAL);
843 par->codec_tag = tag;
845 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
848 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
850 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
852 ffio_free_dyn_buf(&dyn_cp);
856 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
858 uint8_t *colorinfo_ptr;
859 int side_data_size = 0;
860 int ret, colorinfo_size;
861 const uint8_t *side_data;
863 ret = avio_open_dyn_buf(&dyn_cp);
867 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
868 par->color_trc < AVCOL_TRC_NB) {
869 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
872 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
873 par->color_space < AVCOL_SPC_NB) {
874 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
876 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
877 par->color_primaries < AVCOL_PRI_NB) {
878 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
880 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
881 par->color_range < AVCOL_RANGE_NB) {
882 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
884 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
885 par->chroma_location <= AVCHROMA_LOC_TOP) {
888 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
889 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
890 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
893 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
895 if (side_data_size) {
896 const AVContentLightMetadata *metadata =
897 (const AVContentLightMetadata*)side_data;
898 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
899 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
902 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
904 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
905 ebml_master meta_element = start_ebml_master(
906 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
907 const AVMasteringDisplayMetadata *metadata =
908 (const AVMasteringDisplayMetadata*)side_data;
909 if (metadata->has_primaries) {
910 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
911 av_q2d(metadata->display_primaries[0][0]));
912 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
913 av_q2d(metadata->display_primaries[0][1]));
914 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
915 av_q2d(metadata->display_primaries[1][0]));
916 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
917 av_q2d(metadata->display_primaries[1][1]));
918 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
919 av_q2d(metadata->display_primaries[2][0]));
920 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
921 av_q2d(metadata->display_primaries[2][1]));
922 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
923 av_q2d(metadata->white_point[0]));
924 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
925 av_q2d(metadata->white_point[1]));
927 if (metadata->has_luminance) {
928 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
929 av_q2d(metadata->max_luminance));
930 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
931 av_q2d(metadata->min_luminance));
933 end_ebml_master(dyn_cp, meta_element);
936 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
937 if (colorinfo_size) {
938 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
939 avio_write(pb, colorinfo_ptr, colorinfo_size);
940 end_ebml_master(pb, colorinfo);
942 ffio_free_dyn_buf(&dyn_cp);
946 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
951 int side_data_size = 0;
952 int ret, projection_size;
953 uint8_t *projection_ptr;
956 const AVSphericalMapping *spherical =
957 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
963 ret = avio_open_dyn_buf(&dyn_cp);
967 switch (spherical->projection) {
968 case AV_SPHERICAL_EQUIRECTANGULAR:
969 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
970 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
972 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
973 ffio_init_context(&b, private, 20, 1, NULL, NULL, NULL, NULL);
974 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
975 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
976 avio_wb32(&b, 0); // version + flags
977 avio_wb32(&b, spherical->bound_top);
978 avio_wb32(&b, spherical->bound_bottom);
979 avio_wb32(&b, spherical->bound_left);
980 avio_wb32(&b, spherical->bound_right);
981 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
982 private, avio_tell(&b));
984 case AV_SPHERICAL_CUBEMAP:
985 ffio_init_context(&b, private, 12, 1, NULL, NULL, NULL, NULL);
986 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
987 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
988 avio_wb32(&b, 0); // version + flags
989 avio_wb32(&b, 0); // layout
990 avio_wb32(&b, spherical->padding);
991 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
992 private, avio_tell(&b));
995 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
1000 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
1001 (double) spherical->yaw / (1 << 16));
1002 if (spherical->pitch)
1003 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
1004 (double) spherical->pitch / (1 << 16));
1005 if (spherical->roll)
1006 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
1007 (double) spherical->roll / (1 << 16));
1010 projection_size = avio_close_dyn_buf(dyn_cp, &projection_ptr);
1011 if (projection_size) {
1012 ebml_master projection = start_ebml_master(pb,
1013 MATROSKA_ID_VIDEOPROJECTION,
1015 avio_write(pb, projection_ptr, projection_size);
1016 end_ebml_master(pb, projection);
1018 av_freep(&projection_ptr);
1023 static void mkv_write_field_order(AVIOContext *pb, int mode,
1024 enum AVFieldOrder field_order)
1026 switch (field_order) {
1027 case AV_FIELD_UNKNOWN:
1029 case AV_FIELD_PROGRESSIVE:
1030 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1031 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
1037 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1038 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
1039 if (mode != MODE_WEBM) {
1040 switch (field_order) {
1042 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1043 MATROSKA_VIDEO_FIELDORDER_TT);
1046 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1047 MATROSKA_VIDEO_FIELDORDER_BB);
1050 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1051 MATROSKA_VIDEO_FIELDORDER_TB);
1054 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1055 MATROSKA_VIDEO_FIELDORDER_BT);
1062 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1063 AVStream *st, int mode, int *h_width, int *h_height)
1067 AVDictionaryEntry *tag;
1068 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1072 // convert metadata into proper side data and add it to the stream
1073 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1074 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1075 int stereo_mode = atoi(tag->value);
1077 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1078 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1083 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1084 stereo_mode != 10 && stereo_mode != 12) {
1085 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1091 // iterate to find the stereo3d side data
1092 for (i = 0; i < st->nb_side_data; i++) {
1093 AVPacketSideData sd = st->side_data[i];
1094 if (sd.type == AV_PKT_DATA_STEREO3D) {
1095 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1097 switch (stereo->type) {
1098 case AV_STEREO3D_2D:
1099 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1101 case AV_STEREO3D_SIDEBYSIDE:
1102 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1103 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1104 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1107 case AV_STEREO3D_TOPBOTTOM:
1108 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1109 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1113 case AV_STEREO3D_CHECKERBOARD:
1114 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1115 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1118 case AV_STEREO3D_LINES:
1119 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1120 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1124 case AV_STEREO3D_COLUMNS:
1125 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1126 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1130 case AV_STEREO3D_FRAMESEQUENCE:
1131 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1132 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1140 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1143 // if webm, do not write unsupported modes
1144 if ((mode == MODE_WEBM &&
1145 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1146 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1147 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1148 av_log(s, AV_LOG_ERROR,
1149 "The specified stereo mode is not valid.\n");
1150 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1151 return AVERROR(EINVAL);
1154 // write StereoMode if format is valid
1155 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1160 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1161 int i, AVIOContext *pb, int default_stream_exists)
1163 AVStream *st = s->streams[i];
1164 AVCodecParameters *par = st->codecpar;
1165 ebml_master subinfo, track;
1168 int bit_depth = av_get_bits_per_sample(par->codec_id);
1169 int sample_rate = par->sample_rate;
1170 int output_sample_rate = 0;
1171 int display_width_div = 1;
1172 int display_height_div = 1;
1174 AVDictionaryEntry *tag;
1176 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1177 mkv->have_attachments = 1;
1181 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1182 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1183 if (par->bits_per_raw_sample)
1184 bit_depth = par->bits_per_raw_sample;
1186 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1189 bit_depth = par->bits_per_coded_sample;
1192 if (par->codec_id == AV_CODEC_ID_AAC) {
1193 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1194 &output_sample_rate);
1199 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1200 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1201 mkv->is_dash ? mkv->dash_track_number : i + 1);
1202 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1203 mkv->is_dash ? mkv->dash_track_number : i + 1);
1204 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1206 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1207 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1208 tag = av_dict_get(st->metadata, "language", NULL, 0);
1209 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1210 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1211 } else if (tag && tag->value) {
1212 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1215 // The default value for TRACKFLAGDEFAULT is 1, so add element
1216 // if we need to clear it.
1217 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1218 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1220 if (st->disposition & AV_DISPOSITION_FORCED)
1221 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1223 if (mkv->mode == MODE_WEBM) {
1224 const char *codec_id;
1225 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1226 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1227 if (ff_webm_codec_tags[j].id == par->codec_id) {
1228 codec_id = ff_webm_codec_tags[j].str;
1233 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1234 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1235 codec_id = "D_WEBVTT/CAPTIONS";
1236 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1237 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1238 codec_id = "D_WEBVTT/DESCRIPTIONS";
1239 native_id = MATROSKA_TRACK_TYPE_METADATA;
1240 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1241 codec_id = "D_WEBVTT/METADATA";
1242 native_id = MATROSKA_TRACK_TYPE_METADATA;
1244 codec_id = "D_WEBVTT/SUBTITLES";
1245 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1250 av_log(s, AV_LOG_ERROR,
1251 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1252 return AVERROR(EINVAL);
1255 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1257 // look for a codec ID string specific to mkv to use,
1258 // if none are found, use AVI codes
1259 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1260 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1261 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1262 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1268 if (mkv->allow_raw_vfw) {
1271 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1272 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1273 return AVERROR(EINVAL);
1278 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1279 int64_t codecdelay = av_rescale_q(par->initial_padding,
1280 (AVRational){ 1, 48000 },
1281 (AVRational){ 1, 1000000000 });
1282 if (codecdelay < 0) {
1283 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1284 return AVERROR(EINVAL);
1286 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1287 // (AVRational){ 1, par->sample_rate },
1290 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1292 if (par->codec_id == AV_CODEC_ID_OPUS) {
1293 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1296 switch (par->codec_type) {
1297 case AVMEDIA_TYPE_VIDEO:
1298 mkv->have_video = 1;
1299 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1301 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1302 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1303 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1304 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1305 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1306 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1309 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1310 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1311 par->codec_id == AV_CODEC_ID_SVQ1 ||
1312 par->codec_id == AV_CODEC_ID_SVQ3 ||
1313 par->codec_id == AV_CODEC_ID_CINEPAK))
1317 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1318 else if (!native_id) {
1319 // if there is no mkv-specific codec ID, use VFW mode
1320 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1321 mkv->tracks[i].write_dts = 1;
1322 s->internal->avoid_negative_ts_use_pts = 0;
1325 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1327 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1328 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1330 mkv_write_field_order(pb, mkv->mode, par->field_order);
1332 // check both side data and metadata for stereo information,
1333 // write the result to the bitstream if any is found
1334 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1336 &display_height_div);
1340 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1341 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1342 (par->format == AV_PIX_FMT_YUVA420P)) {
1343 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1346 // write DisplayWidth and DisplayHeight, they contain the size of
1347 // a single source view and/or the display aspect ratio
1348 if (st->sample_aspect_ratio.num) {
1349 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1350 if (d_width > INT_MAX) {
1351 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1352 return AVERROR(EINVAL);
1354 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1355 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1356 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1357 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1359 AVRational display_aspect_ratio;
1360 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1361 par->width * (int64_t)st->sample_aspect_ratio.num,
1362 par->height * (int64_t)st->sample_aspect_ratio.den,
1364 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1365 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1366 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1369 } else if (display_width_div != 1 || display_height_div != 1) {
1370 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1371 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1372 } else if (mkv->mode != MODE_WEBM)
1373 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1375 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1376 uint32_t color_space = av_le2ne32(par->codec_tag);
1377 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1379 ret = mkv_write_video_color(pb, par, st);
1382 ret = mkv_write_video_projection(s, pb, st);
1385 end_ebml_master(pb, subinfo);
1388 case AVMEDIA_TYPE_AUDIO:
1389 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1392 // no mkv-specific ID, use ACM mode
1393 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1395 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1396 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1398 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1399 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1400 if (output_sample_rate)
1401 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1403 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1404 end_ebml_master(pb, subinfo);
1407 case AVMEDIA_TYPE_SUBTITLE:
1409 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1410 return AVERROR(ENOSYS);
1413 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1414 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1416 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1419 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1420 return AVERROR(EINVAL);
1423 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1424 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1425 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1430 end_ebml_master(pb, track);
1435 static int mkv_write_tracks(AVFormatContext *s)
1437 MatroskaMuxContext *mkv = s->priv_data;
1438 AVIOContext *pb = s->pb;
1439 int i, ret, default_stream_exists = 0;
1441 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1445 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1449 for (i = 0; i < s->nb_streams; i++) {
1450 AVStream *st = s->streams[i];
1451 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1453 for (i = 0; i < s->nb_streams; i++) {
1454 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1459 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1460 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, &mkv->tracks_pos);
1462 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
1467 static int mkv_write_chapters(AVFormatContext *s)
1469 MatroskaMuxContext *mkv = s->priv_data;
1470 AVIOContext *dyn_cp, *pb = s->pb;
1471 ebml_master editionentry;
1472 AVRational scale = {1, 1E9};
1475 if (!s->nb_chapters || mkv->wrote_chapters)
1478 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1479 if (ret < 0) return ret;
1481 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1482 if (ret < 0) return ret;
1484 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1485 if (mkv->mode != MODE_WEBM) {
1486 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1487 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1489 for (i = 0; i < s->nb_chapters; i++) {
1490 ebml_master chapteratom, chapterdisplay;
1491 AVChapter *c = s->chapters[i];
1492 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1493 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1494 AVDictionaryEntry *t = NULL;
1495 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1496 av_log(s, AV_LOG_ERROR,
1497 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1498 chapterstart, chapterend);
1499 return AVERROR_INVALIDDATA;
1502 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1503 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1504 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1505 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1506 if (mkv->mode != MODE_WEBM) {
1507 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1508 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1510 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1511 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1512 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1513 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1514 end_ebml_master(dyn_cp, chapterdisplay);
1516 end_ebml_master(dyn_cp, chapteratom);
1518 end_ebml_master(dyn_cp, editionentry);
1519 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1521 mkv->wrote_chapters = 1;
1525 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1527 uint8_t *key = av_strdup(t->key);
1529 const uint8_t *lang = NULL;
1533 return AVERROR(ENOMEM);
1535 if ((p = strrchr(p, '-')) &&
1536 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1543 else if (*p >= 'a' && *p <= 'z')
1548 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1549 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1551 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1552 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1553 end_ebml_master(pb, tag);
1559 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1560 unsigned int uid, ebml_master *tag)
1563 MatroskaMuxContext *mkv = s->priv_data;
1564 ebml_master targets;
1567 if (!mkv->tags_bc) {
1568 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1569 if (ret < 0) return ret;
1571 start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1575 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1576 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1578 put_ebml_uint(pb, elementid, uid);
1579 end_ebml_master(pb, targets);
1583 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1585 return av_strcasecmp(name, "title") &&
1586 av_strcasecmp(name, "stereo_mode") &&
1587 av_strcasecmp(name, "creation_time") &&
1588 av_strcasecmp(name, "encoding_tool") &&
1589 av_strcasecmp(name, "duration") &&
1590 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1591 av_strcasecmp(name, "language")) &&
1592 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1593 (av_strcasecmp(name, "filename") &&
1594 av_strcasecmp(name, "mimetype")));
1597 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1600 MatroskaMuxContext *mkv = s->priv_data;
1603 AVDictionaryEntry *t = NULL;
1605 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1609 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1610 if (mkv_check_tag_name(t->key, elementid)) {
1611 ret = mkv_write_simpletag(mkv->tags_bc, t);
1617 end_ebml_master(mkv->tags_bc, tag);
1621 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1623 AVDictionaryEntry *t = NULL;
1625 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1626 if (mkv_check_tag_name(t->key, elementid))
1632 static int mkv_write_tags(AVFormatContext *s)
1634 MatroskaMuxContext *mkv = s->priv_data;
1637 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1639 if (mkv_check_tag(s->metadata, 0)) {
1640 ret = mkv_write_tag(s, s->metadata, 0, 0);
1641 if (ret < 0) return ret;
1644 for (i = 0; i < s->nb_streams; i++) {
1645 AVStream *st = s->streams[i];
1647 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1650 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1653 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1654 if (ret < 0) return ret;
1657 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1658 for (i = 0; i < s->nb_streams; i++) {
1660 AVStream *st = s->streams[i];
1661 ebml_master tag_target;
1664 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1667 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tag_target);
1670 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1671 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1672 mkv->tracks[i].duration_offset = avio_tell(pb);
1674 // Reserve space to write duration as a 20-byte string.
1675 // 2 (ebml id) + 1 (data size) + 20 (data)
1676 put_ebml_void(pb, 23);
1677 end_ebml_master(pb, tag);
1678 end_ebml_master(pb, tag_target);
1682 if (mkv->mode != MODE_WEBM) {
1683 for (i = 0; i < s->nb_chapters; i++) {
1684 AVChapter *ch = s->chapters[i];
1686 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1689 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1695 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1696 for (i = 0; i < mkv->attachments->num_entries; i++) {
1697 mkv_attachment *attachment = &mkv->attachments->entries[i];
1698 AVStream *st = s->streams[attachment->stream_idx];
1700 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1703 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1710 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1711 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, &mkv->tags_pos);
1713 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv);
1718 static int mkv_write_attachments(AVFormatContext *s)
1720 MatroskaMuxContext *mkv = s->priv_data;
1721 AVIOContext *dyn_cp, *pb = s->pb;
1725 if (!mkv->have_attachments)
1728 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1729 if (!mkv->attachments)
1730 return AVERROR(ENOMEM);
1732 av_lfg_init(&c, av_get_random_seed());
1734 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1735 if (ret < 0) return ret;
1737 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1738 if (ret < 0) return ret;
1740 for (i = 0; i < s->nb_streams; i++) {
1741 AVStream *st = s->streams[i];
1742 ebml_master attached_file;
1743 mkv_attachment *attachment = mkv->attachments->entries;
1744 AVDictionaryEntry *t;
1745 const char *mimetype = NULL;
1748 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1751 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1753 return AVERROR(ENOMEM);
1754 mkv->attachments->entries = attachment;
1756 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1758 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1759 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1760 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1761 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1762 return AVERROR(EINVAL);
1764 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1765 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1766 mimetype = t->value;
1767 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1769 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1770 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1771 mimetype = ff_mkv_mime_tags[i].str;
1774 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1775 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1776 mimetype = ff_mkv_image_mime_tags[i].str;
1781 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1782 "it cannot be deduced from the codec id.\n", i);
1783 return AVERROR(EINVAL);
1786 if (s->flags & AVFMT_FLAG_BITEXACT) {
1787 struct AVSHA *sha = av_sha_alloc();
1790 return AVERROR(ENOMEM);
1791 av_sha_init(sha, 160);
1792 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1793 av_sha_final(sha, digest);
1795 fileuid = AV_RL32(digest);
1797 fileuid = av_lfg_get(&c);
1799 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1800 fileuid, mkv->attachments->num_entries);
1802 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1803 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1804 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1805 end_ebml_master(dyn_cp, attached_file);
1807 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1808 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1810 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1815 static int64_t get_metadata_duration(AVFormatContext *s)
1821 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1822 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1823 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1827 for (i = 0; i < s->nb_streams; i++) {
1829 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1831 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1832 max = FFMAX(max, us);
1835 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1839 static int mkv_write_header(AVFormatContext *s)
1841 MatroskaMuxContext *mkv = s->priv_data;
1842 AVIOContext *pb = s->pb;
1843 ebml_master ebml_header;
1844 AVDictionaryEntry *tag;
1845 int ret, i, version = 2;
1846 int64_t creation_time;
1848 if (!strcmp(s->oformat->name, "webm")) {
1849 mkv->mode = MODE_WEBM;
1852 mkv->mode = MODE_MATROSKAv2;
1854 if (mkv->mode != MODE_WEBM ||
1855 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1856 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1859 for (i = 0; i < s->nb_streams; i++) {
1860 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1861 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1862 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1866 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1868 return AVERROR(ENOMEM);
1870 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1871 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1872 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1873 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1874 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1875 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1876 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1877 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1878 end_ebml_master(pb, ebml_header);
1880 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1881 mkv->segment_offset = avio_tell(pb);
1883 // we write a seek head at the beginning to point to all other level
1884 // one elements, which aren't more than 10 elements as we write only one
1885 // of every other currently defined level 1 element
1886 mkv->seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1887 if (!mkv->seekhead) {
1888 return AVERROR(ENOMEM);
1891 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1895 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1900 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1901 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1902 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1903 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1904 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1905 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1906 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1908 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1910 if (mkv->mode != MODE_WEBM) {
1911 uint32_t segment_uid[4];
1914 av_lfg_init(&lfg, av_get_random_seed());
1916 for (i = 0; i < 4; i++)
1917 segment_uid[i] = av_lfg_get(&lfg);
1919 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1922 const char *ident = "Lavf";
1923 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1924 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1927 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1928 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1929 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1930 uint8_t date_utc_buf[8];
1931 AV_WB64(date_utc_buf, date_utc);
1932 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1935 // reserve space for the duration
1937 mkv->duration_offset = avio_tell(pb);
1938 if (!mkv->is_live) {
1939 int64_t metadata_duration = get_metadata_duration(s);
1941 if (s->duration > 0) {
1942 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1943 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1944 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1945 } else if (metadata_duration > 0) {
1946 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1947 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1948 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1950 put_ebml_void(pb, 11); // assumes double-precision float to be written
1953 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1954 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, &mkv->info_pos);
1956 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv);
1959 ret = mkv_write_tracks(s);
1963 for (i = 0; i < s->nb_chapters; i++)
1964 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1966 ret = mkv_write_chapters(s);
1970 if (mkv->mode != MODE_WEBM) {
1971 ret = mkv_write_attachments(s);
1976 ret = mkv_write_tags(s);
1980 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1981 mkv_write_seekhead(pb, mkv);
1983 mkv->cues = mkv_start_cues(mkv->segment_offset);
1985 return AVERROR(ENOMEM);
1988 if (s->metadata_header_padding > 0) {
1989 if (s->metadata_header_padding == 1)
1990 s->metadata_header_padding++;
1991 put_ebml_void(pb, s->metadata_header_padding);
1994 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1995 mkv->cues_pos = avio_tell(pb);
1996 if (mkv->reserve_cues_space == 1)
1997 mkv->reserve_cues_space++;
1998 put_ebml_void(pb, mkv->reserve_cues_space);
2001 av_init_packet(&mkv->cur_audio_pkt);
2002 mkv->cur_audio_pkt.size = 0;
2003 mkv->cluster_pos = -1;
2007 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2008 // after 4k and on a keyframe
2009 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
2010 if (mkv->cluster_time_limit < 0)
2011 mkv->cluster_time_limit = 5000;
2012 if (mkv->cluster_size_limit < 0)
2013 mkv->cluster_size_limit = 5 * 1024 * 1024;
2015 if (mkv->cluster_time_limit < 0)
2016 mkv->cluster_time_limit = 1000;
2017 if (mkv->cluster_size_limit < 0)
2018 mkv->cluster_size_limit = 32 * 1024;
2024 static int mkv_blockgroup_size(int pkt_size)
2026 int size = pkt_size + 4;
2027 size += ebml_num_size(size);
2028 size += 2; // EBML ID for block and block duration
2029 size += 9; // max size of block duration incl. length field
2033 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
2040 dst = av_malloc(srclen);
2042 return AVERROR(ENOMEM);
2044 while (srclen >= WV_HEADER_SIZE) {
2047 ret = ff_wv_parse_header(&header, src);
2050 src += WV_HEADER_SIZE;
2051 srclen -= WV_HEADER_SIZE;
2053 if (srclen < header.blocksize) {
2054 ret = AVERROR_INVALIDDATA;
2058 if (header.initial) {
2059 AV_WL32(dst + offset, header.samples);
2062 AV_WL32(dst + offset, header.flags);
2063 AV_WL32(dst + offset + 4, header.crc);
2066 if (!(header.initial && header.final)) {
2067 AV_WL32(dst + offset, header.blocksize);
2071 memcpy(dst + offset, src, header.blocksize);
2072 src += header.blocksize;
2073 srclen -= header.blocksize;
2074 offset += header.blocksize;
2086 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2087 uint32_t blockid, AVPacket *pkt, int keyframe)
2089 MatroskaMuxContext *mkv = s->priv_data;
2090 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2091 mkv_track *track = &mkv->tracks[pkt->stream_index];
2092 uint8_t *data = NULL, *side_data = NULL;
2093 int offset = 0, size = pkt->size, side_data_size = 0;
2094 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2095 uint64_t additional_id = 0;
2096 int64_t discard_padding = 0;
2097 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2098 ebml_master block_group, block_additions, block_more;
2100 ts += track->ts_offset;
2102 /* The following string is identical to the one in mkv_write_vtt_blocks
2103 * so that only one copy needs to exist in binaries. */
2104 av_log(s, AV_LOG_DEBUG,
2105 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2106 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2107 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2108 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2109 mkv->cluster_pos, track_number, keyframe != 0);
2110 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2111 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2112 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2113 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2114 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2115 /* extradata is Annex B, assume the bitstream is too and convert it */
2116 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2117 else if (par->codec_id == AV_CODEC_ID_AV1)
2118 ff_av1_filter_obus_buf(pkt->data, &data, &size);
2119 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2120 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
2122 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
2128 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2129 /* Matroska specification requires to remove the first QuickTime atom
2135 side_data = av_packet_get_side_data(pkt,
2136 AV_PKT_DATA_SKIP_SAMPLES,
2139 if (side_data && side_data_size >= 10) {
2140 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2141 (AVRational){1, par->sample_rate},
2142 (AVRational){1, 1000000000});
2145 side_data = av_packet_get_side_data(pkt,
2146 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2149 additional_id = AV_RB64(side_data);
2151 side_data_size -= 8;
2154 if ((side_data_size && additional_id == 1) || discard_padding) {
2155 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2156 blockid = MATROSKA_ID_BLOCK;
2159 put_ebml_id(pb, blockid);
2160 put_ebml_num(pb, size + 4, 0);
2161 // this assumes stream_index is less than 126
2162 avio_w8(pb, 0x80 | track_number);
2163 avio_wb16(pb, ts - mkv->cluster_pts);
2164 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2165 avio_write(pb, data + offset, size);
2166 if (data != pkt->data)
2169 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2170 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp);
2172 track->last_timestamp = ts - mkv->cluster_pts;
2174 if (discard_padding) {
2175 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2178 if (side_data_size && additional_id == 1) {
2179 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2180 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2181 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2182 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2183 put_ebml_num(pb, side_data_size, 0);
2184 avio_write(pb, side_data, side_data_size);
2185 end_ebml_master(pb, block_more);
2186 end_ebml_master(pb, block_additions);
2188 if ((side_data_size && additional_id == 1) || discard_padding) {
2189 end_ebml_master(pb, block_group);
2193 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2195 MatroskaMuxContext *mkv = s->priv_data;
2196 ebml_master blockgroup;
2197 int id_size, settings_size, size;
2198 uint8_t *id, *settings;
2199 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2200 const int flags = 0;
2203 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2207 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2210 size = id_size + 1 + settings_size + 1 + pkt->size;
2212 /* The following string is identical to the one in mkv_write_block so that
2213 * only one copy needs to exist in binaries. */
2214 av_log(s, AV_LOG_DEBUG,
2215 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2216 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2217 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2218 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2219 mkv->cluster_pos, pkt->stream_index + 1, 1);
2221 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2223 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2224 put_ebml_num(pb, size + 4, 0);
2225 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2226 avio_wb16(pb, ts - mkv->cluster_pts);
2228 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2230 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2231 end_ebml_master(pb, blockgroup);
2233 return pkt->duration;
2236 static void mkv_end_cluster(AVFormatContext *s)
2238 MatroskaMuxContext *mkv = s->priv_data;
2240 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2241 mkv->cluster_pos = -1;
2245 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2247 MatroskaMuxContext *mkv = s->priv_data;
2248 mkv_track *track = &mkv->tracks[pkt->stream_index];
2249 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2251 int side_data_size = 0, ret;
2253 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2256 switch (par->codec_id) {
2257 case AV_CODEC_ID_AAC:
2258 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2259 int filler, output_sample_rate = 0;
2261 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2262 &output_sample_rate);
2265 if (!output_sample_rate)
2266 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2267 av_freep(&par->extradata);
2268 ret = ff_alloc_extradata(par, side_data_size);
2271 memcpy(par->extradata, side_data, side_data_size);
2272 curpos = avio_tell(mkv->tracks_bc);
2273 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2274 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2275 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2277 put_ebml_void(mkv->tracks_bc, filler);
2278 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2279 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2280 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2281 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2282 } else if (!par->extradata_size && !track->sample_rate) {
2283 // No extradata (codecpar or packet side data).
2284 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2285 return AVERROR(EINVAL);
2288 case AV_CODEC_ID_FLAC:
2289 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2290 AVCodecParameters *codecpriv_par;
2292 if (side_data_size != par->extradata_size) {
2293 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2295 return AVERROR(EINVAL);
2297 codecpriv_par = avcodec_parameters_alloc();
2299 return AVERROR(ENOMEM);
2300 ret = avcodec_parameters_copy(codecpriv_par, par);
2302 avcodec_parameters_free(&codecpriv_par);
2305 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2306 curpos = avio_tell(mkv->tracks_bc);
2307 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2308 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2309 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2310 avcodec_parameters_free(&codecpriv_par);
2313 // FIXME: Remove the following once libaom starts propagating extradata during init()
2314 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2315 case AV_CODEC_ID_AV1:
2316 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2317 !par->extradata_size) {
2318 AVIOContext *dyn_cp;
2322 ret = avio_open_dyn_buf(&dyn_cp);
2325 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2326 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2327 if (!codecpriv_size) {
2329 return AVERROR_INVALIDDATA;
2331 curpos = avio_tell(mkv->tracks_bc);
2332 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2333 // Do not write the OBUs as we don't have space saved for them
2334 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2336 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2337 ret = ff_alloc_extradata(par, side_data_size);
2340 memcpy(par->extradata, side_data, side_data_size);
2341 } else if (!par->extradata_size)
2342 return AVERROR_INVALIDDATA;
2346 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2353 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2355 MatroskaMuxContext *mkv = s->priv_data;
2357 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2358 mkv_track *track = &mkv->tracks[pkt->stream_index];
2359 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2360 int duration = pkt->duration;
2362 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2363 int64_t relative_packet_pos;
2364 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2366 if (ts == AV_NOPTS_VALUE) {
2367 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2368 return AVERROR(EINVAL);
2370 ts += track->ts_offset;
2372 if (mkv->cluster_pos != -1) {
2373 int64_t cluster_time = ts - mkv->cluster_pts;
2374 if ((int16_t)cluster_time != cluster_time) {
2376 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2380 if (mkv->cluster_pos == -1) {
2381 mkv->cluster_pos = avio_tell(s->pb);
2382 ret = start_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2385 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2386 mkv->cluster_pts = FFMAX(0, ts);
2387 av_log(s, AV_LOG_DEBUG,
2388 "Starting new cluster with timestamp "
2389 "%" PRId64 " at offset %" PRId64 " bytes\n",
2390 mkv->cluster_pts, mkv->cluster_pos);
2392 pb = mkv->cluster_bc;
2394 relative_packet_pos = avio_tell(pb);
2396 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2397 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2398 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2399 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2400 if (ret < 0) return ret;
2403 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2404 duration = mkv_write_vtt_blocks(s, pb, pkt);
2406 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2407 mkv_blockgroup_size(pkt->size));
2409 #if FF_API_CONVERGENCE_DURATION
2410 FF_DISABLE_DEPRECATION_WARNINGS
2411 /* For backward compatibility, prefer convergence_duration. */
2412 if (pkt->convergence_duration > 0) {
2413 duration = pkt->convergence_duration;
2415 FF_ENABLE_DEPRECATION_WARNINGS
2417 /* All subtitle blocks are considered to be keyframes. */
2418 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2419 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2420 end_ebml_master(pb, blockgroup);
2423 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2424 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts,
2425 mkv->cluster_pos, relative_packet_pos, duration);
2431 mkv->duration = FFMAX(mkv->duration, ts + duration);
2432 track->duration = FFMAX(track->duration, ts + duration);
2437 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2439 MatroskaMuxContext *mkv = s->priv_data;
2440 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2441 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2443 int64_t cluster_time;
2445 int start_new_cluster;
2447 ret = mkv_check_new_extra_data(s, pkt);
2451 if (mkv->tracks[pkt->stream_index].write_dts)
2452 cluster_time = pkt->dts - mkv->cluster_pts;
2454 cluster_time = pkt->pts - mkv->cluster_pts;
2455 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2457 cluster_size = avio_tell(mkv->cluster_bc);
2459 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2460 // WebM DASH specification states that the first block of every cluster
2461 // has to be a key frame. So for DASH video, we only create a cluster
2462 // on seeing key frames.
2463 start_new_cluster = keyframe;
2464 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2465 (mkv->cluster_pos == -1 ||
2466 cluster_time > mkv->cluster_time_limit)) {
2467 // For DASH audio, we create a Cluster based on cluster_time_limit
2468 start_new_cluster = 1;
2469 } else if (!mkv->is_dash &&
2470 (cluster_size > mkv->cluster_size_limit ||
2471 cluster_time > mkv->cluster_time_limit ||
2472 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2473 cluster_size > 4 * 1024))) {
2474 start_new_cluster = 1;
2476 start_new_cluster = 0;
2479 if (mkv->cluster_pos != -1 && start_new_cluster) {
2483 if (!mkv->cluster_pos)
2484 avio_write_marker(s->pb,
2485 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2486 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2488 // check if we have an audio packet cached
2489 if (mkv->cur_audio_pkt.size > 0) {
2490 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2491 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2492 mkv->is_dash ? start_new_cluster : 0);
2493 av_packet_unref(&mkv->cur_audio_pkt);
2495 av_log(s, AV_LOG_ERROR,
2496 "Could not write cached audio packet ret:%d\n", ret);
2501 // buffer an audio packet to ensure the packet containing the video
2502 // keyframe's timecode is contained in the same cluster for WebM
2503 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2505 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2507 ret = mkv_write_packet_internal(s, pkt, 0);
2511 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2513 MatroskaMuxContext *mkv = s->priv_data;
2516 if (mkv->cluster_pos != -1) {
2518 av_log(s, AV_LOG_DEBUG,
2519 "Flushing cluster at offset %" PRIu64 " bytes\n",
2524 return mkv_write_packet(s, pkt);
2527 static int mkv_write_trailer(AVFormatContext *s)
2529 MatroskaMuxContext *mkv = s->priv_data;
2530 AVIOContext *pb = s->pb;
2531 int64_t currentpos, cuespos;
2534 // check if we have an audio packet cached
2535 if (mkv->cur_audio_pkt.size > 0) {
2536 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2538 av_log(s, AV_LOG_ERROR,
2539 "Could not write cached audio packet ret:%d\n", ret);
2544 if (mkv->cluster_bc) {
2545 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv);
2548 ret = mkv_write_chapters(s);
2553 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2554 if (mkv->cues->num_entries) {
2555 if (mkv->reserve_cues_space) {
2558 currentpos = avio_tell(pb);
2559 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2561 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2562 cues_end = avio_tell(pb);
2563 if (cues_end > cuespos + mkv->reserve_cues_space) {
2564 av_log(s, AV_LOG_ERROR,
2565 "Insufficient space reserved for cues: %d "
2566 "(needed: %" PRId64 ").\n",
2567 mkv->reserve_cues_space, cues_end - cuespos);
2568 return AVERROR(EINVAL);
2571 if (cues_end < cuespos + mkv->reserve_cues_space)
2572 put_ebml_void(pb, mkv->reserve_cues_space -
2573 (cues_end - cuespos));
2575 avio_seek(pb, currentpos, SEEK_SET);
2577 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2580 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CUES,
2586 mkv_write_seekhead(pb, mkv);
2588 // update the duration
2589 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2590 currentpos = avio_tell(pb);
2591 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2592 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2593 avio_seek(pb, mkv->info_pos, SEEK_SET);
2594 end_ebml_master_crc32(pb, &mkv->info_bc, mkv);
2596 // write tracks master
2597 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2598 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
2600 // update stream durations
2601 if (!mkv->is_live) {
2603 int64_t curr = avio_tell(mkv->tags_bc);
2604 for (i = 0; i < s->nb_streams; ++i) {
2605 AVStream *st = s->streams[i];
2606 mkv_track *track = &mkv->tracks[i];
2608 if (track->duration_offset > 0) {
2609 double duration_sec = track->duration * av_q2d(st->time_base);
2610 char duration_string[20] = "";
2612 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2615 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2617 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2618 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2619 fmod(duration_sec, 60));
2621 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2624 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2626 if (mkv->tags_bc && !mkv->is_live) {
2627 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2628 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv);
2631 avio_seek(pb, currentpos, SEEK_SET);
2634 if (!mkv->is_live) {
2635 end_ebml_master(pb, mkv->segment);
2641 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2644 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2645 if (ff_mkv_codec_tags[i].id == codec_id)
2648 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2649 enum AVMediaType type = avcodec_get_type(codec_id);
2650 // mkv theoretically supports any video/audio through VFW/ACM
2651 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2658 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2661 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2662 if (ff_webm_codec_tags[i].id == codec_id)
2668 static int mkv_init(struct AVFormatContext *s)
2672 if (s->nb_streams > MAX_TRACKS) {
2673 av_log(s, AV_LOG_ERROR,
2674 "At most %d streams are supported for muxing in Matroska\n",
2676 return AVERROR(EINVAL);
2679 for (i = 0; i < s->nb_streams; i++) {
2680 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2681 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2682 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2683 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2684 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2685 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2686 av_log(s, AV_LOG_ERROR,
2687 "The Matroska muxer does not yet support muxing %s\n",
2688 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2689 return AVERROR_PATCHWELCOME;
2693 if (s->avoid_negative_ts < 0) {
2694 s->avoid_negative_ts = 1;
2695 s->internal->avoid_negative_ts_use_pts = 1;
2698 for (i = 0; i < s->nb_streams; i++) {
2699 // ms precision is the de-facto standard timescale for mkv files
2700 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2706 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2709 AVStream *st = s->streams[pkt->stream_index];
2711 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2712 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2713 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2714 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2715 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2721 static const AVCodecTag additional_audio_tags[] = {
2722 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2723 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2724 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2725 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2726 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2727 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2728 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2729 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2730 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2731 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2732 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2733 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2734 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2737 static const AVCodecTag additional_video_tags[] = {
2738 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2739 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2740 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2741 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2744 static const AVCodecTag additional_subtitle_tags[] = {
2745 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2746 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2747 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2748 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2751 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2752 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2753 static const AVOption options[] = {
2754 { "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 },
2755 { "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 },
2756 { "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 },
2757 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2758 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2759 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2760 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2761 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2765 #if CONFIG_MATROSKA_MUXER
2766 static const AVClass matroska_class = {
2767 .class_name = "matroska muxer",
2768 .item_name = av_default_item_name,
2770 .version = LIBAVUTIL_VERSION_INT,
2773 AVOutputFormat ff_matroska_muxer = {
2775 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2776 .mime_type = "video/x-matroska",
2777 .extensions = "mkv",
2778 .priv_data_size = sizeof(MatroskaMuxContext),
2779 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2780 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2781 .video_codec = CONFIG_LIBX264_ENCODER ?
2782 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2784 .deinit = mkv_deinit,
2785 .write_header = mkv_write_header,
2786 .write_packet = mkv_write_flush_packet,
2787 .write_trailer = mkv_write_trailer,
2788 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2789 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2790 .codec_tag = (const AVCodecTag* const []){
2791 ff_codec_bmp_tags, ff_codec_wav_tags,
2792 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2794 .subtitle_codec = AV_CODEC_ID_ASS,
2795 .query_codec = mkv_query_codec,
2796 .check_bitstream = mkv_check_bitstream,
2797 .priv_class = &matroska_class,
2801 #if CONFIG_WEBM_MUXER
2802 static const AVClass webm_class = {
2803 .class_name = "webm muxer",
2804 .item_name = av_default_item_name,
2806 .version = LIBAVUTIL_VERSION_INT,
2809 AVOutputFormat ff_webm_muxer = {
2811 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2812 .mime_type = "video/webm",
2813 .extensions = "webm",
2814 .priv_data_size = sizeof(MatroskaMuxContext),
2815 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2816 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2817 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2819 .deinit = mkv_deinit,
2820 .write_header = mkv_write_header,
2821 .write_packet = mkv_write_flush_packet,
2822 .write_trailer = mkv_write_trailer,
2823 .query_codec = webm_query_codec,
2824 .check_bitstream = mkv_check_bitstream,
2825 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2826 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2827 .priv_class = &webm_class,
2831 #if CONFIG_MATROSKA_AUDIO_MUXER
2832 static const AVClass mka_class = {
2833 .class_name = "matroska audio muxer",
2834 .item_name = av_default_item_name,
2836 .version = LIBAVUTIL_VERSION_INT,
2838 AVOutputFormat ff_matroska_audio_muxer = {
2840 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2841 .mime_type = "audio/x-matroska",
2842 .extensions = "mka",
2843 .priv_data_size = sizeof(MatroskaMuxContext),
2844 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2845 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2846 .video_codec = AV_CODEC_ID_NONE,
2848 .deinit = mkv_deinit,
2849 .write_header = mkv_write_header,
2850 .write_packet = mkv_write_flush_packet,
2851 .write_trailer = mkv_write_trailer,
2852 .check_bitstream = mkv_check_bitstream,
2853 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2855 .codec_tag = (const AVCodecTag* const []){
2856 ff_codec_wav_tags, additional_audio_tags, 0
2858 .priv_class = &mka_class,