3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "avio_internal.h"
29 #include "avlanguage.h"
35 #include "subtitles.h"
36 #include "vorbiscomment.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/channel_layout.h"
41 #include "libavutil/crc.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/intfloat.h"
44 #include "libavutil/intreadwrite.h"
45 #include "libavutil/lfg.h"
46 #include "libavutil/mastering_display_metadata.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/opt.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/random_seed.h"
51 #include "libavutil/rational.h"
52 #include "libavutil/samplefmt.h"
53 #include "libavutil/sha.h"
54 #include "libavutil/stereo3d.h"
56 #include "libavcodec/xiph.h"
57 #include "libavcodec/mpeg4audio.h"
58 #include "libavcodec/internal.h"
60 /* Level 1 elements we create a SeekHead entry for:
61 * Info, Tracks, Chapters, Attachments, Tags and Cues */
62 #define MAX_SEEKHEAD_ENTRIES 6
64 typedef struct ebml_master {
65 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
66 int sizebytes; ///< how many bytes were reserved for the size
69 typedef struct mkv_seekhead_entry {
74 typedef struct mkv_seekhead {
76 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
81 typedef struct mkv_cuepoint {
85 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
86 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
87 int64_t duration; ///< duration of the block according to time base
90 typedef struct mkv_cues {
91 int64_t segment_offset;
92 mkv_cuepoint *entries;
96 typedef struct mkv_track {
100 int64_t sample_rate_offset;
101 int64_t last_timestamp;
103 int64_t duration_offset;
104 int64_t codecpriv_offset;
108 typedef struct mkv_attachment {
113 typedef struct mkv_attachments {
114 mkv_attachment *entries;
118 #define MODE_MATROSKAv2 0x01
119 #define MODE_WEBM 0x02
121 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
122 * range 1 to 126 (inclusive) */
123 #define MAX_TRACKS 126
125 typedef struct MatroskaMuxContext {
126 const AVClass *class;
128 AVIOContext *tags_bc;
130 AVIOContext *info_bc;
132 AVIOContext *tracks_bc;
135 int64_t segment_offset;
136 AVIOContext *cluster_bc;
137 int64_t cluster_pos; ///< file offset of the current cluster
139 int64_t duration_offset;
141 mkv_seekhead seekhead;
144 mkv_attachments *attachments;
146 AVPacket cur_audio_pkt;
148 int have_attachments;
151 int reserve_cues_space;
152 int cluster_size_limit;
154 int64_t cluster_time_limit;
156 int dash_track_number;
160 uint32_t chapter_id_offset;
164 } MatroskaMuxContext;
166 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
167 * 8 byte for "matroska" doctype string */
168 #define MAX_EBML_HEADER_SIZE 35
170 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
171 * offset, 4 bytes for target EBML ID */
172 #define MAX_SEEKENTRY_SIZE 21
174 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 3 8-byte uint max
175 * and one 1-byte uint for the track number (this assumes MAX_TRACKS to be <= 255) */
176 #define MAX_CUETRACKPOS_SIZE 35
178 /** per-cuepoint - 1 1-byte EBML ID, 1 1-byte EBML size, 8-byte uint max */
179 #define MAX_CUEPOINT_CONTENT_SIZE(num_tracks) 10 + MAX_CUETRACKPOS_SIZE * num_tracks
181 /** Seek preroll value for opus */
182 #define OPUS_SEEK_PREROLL 80000000
184 static int ebml_id_size(uint32_t id)
186 return (av_log2(id) + 7U) / 8;
189 static void put_ebml_id(AVIOContext *pb, uint32_t id)
191 int i = ebml_id_size(id);
193 avio_w8(pb, (uint8_t)(id >> (i * 8)));
197 * Write an EBML size meaning "unknown size".
199 * @param bytes The number of bytes the size should occupy (maximum: 8).
201 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
203 av_assert0(bytes <= 8);
204 avio_w8(pb, 0x1ff >> bytes);
205 ffio_fill(pb, 0xff, bytes - 1);
209 * Calculate how many bytes are needed to represent a given number in EBML.
211 static int ebml_num_size(uint64_t num)
214 while ((num + 1) >> bytes * 7)
220 * Write a number in EBML variable length format.
222 * @param bytes The number of bytes that need to be used to write the number.
223 * If zero, the minimal number of bytes will be used.
225 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
227 int i, needed_bytes = ebml_num_size(num);
229 // sizes larger than this are currently undefined in EBML
230 av_assert0(num < (1ULL << 56) - 1);
233 bytes = needed_bytes;
234 // The bytes needed to write the given size must not exceed
235 // the bytes that we ought to use.
236 av_assert0(bytes >= needed_bytes);
238 num |= 1ULL << bytes * 7;
239 for (i = bytes - 1; i >= 0; i--)
240 avio_w8(pb, (uint8_t)(num >> i * 8));
243 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
250 put_ebml_id(pb, elementid);
251 put_ebml_num(pb, bytes, 0);
252 for (i = bytes - 1; i >= 0; i--)
253 avio_w8(pb, (uint8_t)(val >> i * 8));
256 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
259 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
261 while (tmp>>=8) bytes++;
263 put_ebml_id(pb, elementid);
264 put_ebml_num(pb, bytes, 0);
265 for (i = bytes - 1; i >= 0; i--)
266 avio_w8(pb, (uint8_t)(val >> i * 8));
269 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
271 put_ebml_id(pb, elementid);
272 put_ebml_num(pb, 8, 0);
273 avio_wb64(pb, av_double2int(val));
276 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
277 const void *buf, int size)
279 put_ebml_id(pb, elementid);
280 put_ebml_num(pb, size, 0);
281 avio_write(pb, buf, size);
284 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
287 put_ebml_binary(pb, elementid, str, strlen(str));
291 * Write a void element of a given size. Useful for reserving space in
292 * the file to be written to later.
294 * @param size The number of bytes to reserve, which must be at least 2.
296 static void put_ebml_void(AVIOContext *pb, uint64_t size)
298 int64_t currentpos = avio_tell(pb);
300 av_assert0(size >= 2);
302 put_ebml_id(pb, EBML_ID_VOID);
303 // we need to subtract the length needed to store the size from the
304 // size we need to reserve so 2 cases, we use 8 bytes to store the
305 // size if possible, 1 byte otherwise
307 put_ebml_num(pb, size - 2, 0);
309 put_ebml_num(pb, size - 9, 8);
310 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
313 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
314 uint64_t expectedsize)
316 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
318 put_ebml_id(pb, elementid);
319 put_ebml_size_unknown(pb, bytes);
320 return (ebml_master) { avio_tell(pb), bytes };
323 static void end_ebml_master(AVIOContext *pb, ebml_master master)
325 int64_t pos = avio_tell(pb);
327 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
329 put_ebml_num(pb, pos - master.pos, master.sizebytes);
330 avio_seek(pb, pos, SEEK_SET);
333 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
338 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
341 put_ebml_id(pb, elementid);
343 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
348 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
350 uint8_t *buf, crc[4];
353 size = avio_close_dyn_buf(*dyn_cp, &buf);
354 put_ebml_num(pb, size, 0);
355 if (mkv->write_crc) {
356 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
357 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
358 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
360 avio_write(pb, buf + skip, size - skip);
367 * Complete ebml master without destroying the buffer, allowing for later updates
369 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
373 int size = avio_get_dyn_buf(*dyn_cp, &buf);
375 *pos = avio_tell(pb);
377 put_ebml_num(pb, size, 0);
378 avio_write(pb, buf, size);
381 static void put_xiph_size(AVIOContext *pb, int size)
383 ffio_fill(pb, 255, size / 255);
384 avio_w8(pb, size % 255);
388 * Free the members allocated in the mux context.
390 static void mkv_deinit(AVFormatContext *s)
392 MatroskaMuxContext *mkv = s->priv_data;
394 av_packet_unref(&mkv->cur_audio_pkt);
396 ffio_free_dyn_buf(&mkv->cluster_bc);
397 ffio_free_dyn_buf(&mkv->info_bc);
398 ffio_free_dyn_buf(&mkv->tracks_bc);
399 ffio_free_dyn_buf(&mkv->tags_bc);
402 av_freep(&mkv->cues->entries);
403 av_freep(&mkv->cues);
405 if (mkv->attachments) {
406 av_freep(&mkv->attachments->entries);
407 av_freep(&mkv->attachments);
409 av_freep(&mkv->tracks);
413 * Initialize the SeekHead element to be ready to index level 1 Matroska
414 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
415 * will be reserved at the current file location.
417 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
419 mkv->seekhead.filepos = avio_tell(pb);
420 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
421 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
422 // that an EBML void element will fit afterwards
423 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
424 put_ebml_void(pb, mkv->seekhead.reserved_size);
427 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
430 mkv_seekhead *seekhead = &mkv->seekhead;
432 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
434 seekhead->entries[seekhead->num_entries].elementid = elementid;
435 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
439 * Write the SeekHead to the file at the location reserved for it
440 * and seek to destpos afterwards. When error_on_seek_failure
441 * is not set, failure to seek to the position designated for the
442 * SeekHead is not considered an error and it is presumed that
443 * destpos is the current position; failure to seek to destpos
444 * afterwards is always an error.
446 * @return 0 on success, < 0 on error.
448 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
449 int error_on_seek_failure, int64_t destpos)
452 mkv_seekhead *seekhead = &mkv->seekhead;
453 int64_t remaining, ret64;
456 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
457 return error_on_seek_failure ? ret64 : 0;
459 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD);
463 for (i = 0; i < seekhead->num_entries; i++) {
464 mkv_seekhead_entry *entry = &seekhead->entries[i];
465 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
468 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
469 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
470 put_ebml_id(dyn_cp, entry->elementid);
472 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
473 end_ebml_master(dyn_cp, seekentry);
475 end_ebml_master_crc32(pb, &dyn_cp, mkv);
477 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
478 put_ebml_void(pb, remaining);
480 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
486 static mkv_cues *mkv_start_cues(int64_t segment_offset)
488 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
492 cues->segment_offset = segment_offset;
496 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
497 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
499 mkv_cuepoint *entries = cues->entries;
504 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
506 return AVERROR(ENOMEM);
507 cues->entries = entries;
509 cues->entries[cues->num_entries].pts = ts;
510 cues->entries[cues->num_entries].stream_idx = stream;
511 cues->entries[cues->num_entries].tracknum = tracknum;
512 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
513 cues->entries[cues->num_entries].relative_pos = relative_pos;
514 cues->entries[cues->num_entries++].duration = duration;
519 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
521 MatroskaMuxContext *mkv = s->priv_data;
522 AVIOContext *dyn_cp, *pb = s->pb;
526 currentpos = avio_tell(pb);
527 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
531 for (i = 0; i < cues->num_entries; i++) {
532 ebml_master cuepoint, track_positions;
533 mkv_cuepoint *entry = &cues->entries[i];
534 uint64_t pts = entry->pts;
537 // Calculate the number of entries, so we know the element size
538 for (j = 0; j < num_tracks; j++)
539 tracks[j].has_cue = 0;
540 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
541 int idx = entry[j].stream_idx;
543 av_assert0(idx >= 0 && idx < num_tracks);
544 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
546 tracks[idx].has_cue = 1;
550 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_CONTENT_SIZE(ctp_nb));
551 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
553 // put all the entries from different tracks that have the exact same
554 // timestamp into the same CuePoint
555 for (j = 0; j < num_tracks; j++)
556 tracks[j].has_cue = 0;
557 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
558 int idx = entry[j].stream_idx;
560 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
562 tracks[idx].has_cue = 1;
563 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
564 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
565 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
566 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
567 if (entry[j].duration != -1)
568 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
569 end_ebml_master(dyn_cp, track_positions);
572 end_ebml_master(dyn_cp, cuepoint);
574 end_ebml_master_crc32(pb, &dyn_cp, mkv);
579 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
581 const uint8_t *header_start[3];
583 int first_header_size;
586 if (par->codec_id == AV_CODEC_ID_VORBIS)
587 first_header_size = 30;
589 first_header_size = 42;
591 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
592 first_header_size, header_start, header_len) < 0) {
593 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
597 avio_w8(pb, 2); // number packets - 1
598 for (j = 0; j < 2; j++) {
599 put_xiph_size(pb, header_len[j]);
601 for (j = 0; j < 3; j++)
602 avio_write(pb, header_start[j], header_len[j]);
607 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
609 if (par->extradata && par->extradata_size == 2)
610 avio_write(pb, par->extradata, 2);
612 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
616 static int put_flac_codecpriv(AVFormatContext *s,
617 AVIOContext *pb, AVCodecParameters *par)
619 int write_comment = (par->channel_layout &&
620 !(par->channel_layout & ~0x3ffffULL) &&
621 !ff_flac_is_native_layout(par->channel_layout));
622 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
629 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
630 "Lavf" : LIBAVFORMAT_IDENT;
631 AVDictionary *dict = NULL;
632 uint8_t buf[32], *data, *p;
635 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
636 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
638 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
639 if (len >= ((1<<24) - 4)) {
641 return AVERROR(EINVAL);
644 data = av_malloc(len + 4);
647 return AVERROR(ENOMEM);
651 AV_WB24(data + 1, len);
654 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
656 avio_write(pb, data, len + 4);
665 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
666 int *sample_rate, int *output_sample_rate)
668 MPEG4AudioConfig mp4ac;
671 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
672 /* Don't abort if the failure is because of missing extradata. Assume in that
673 * case a bitstream filter will provide the muxer with the extradata in the
675 * Abort however if s->pb is not seekable, as we would not be able to seek back
676 * to write the sample rate elements once the extradata shows up, anyway. */
677 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
678 av_log(s, AV_LOG_ERROR,
679 "Error parsing AAC extradata, unable to determine samplerate.\n");
680 return AVERROR(EINVAL);
684 /* This will only happen when this function is called while writing the
685 * header and no extradata is available. The space for this element has
686 * to be reserved for when this function is called again after the
687 * extradata shows up in the first packet, as there's no way to know if
688 * output_sample_rate will be different than sample_rate or not. */
689 *output_sample_rate = *sample_rate;
691 *sample_rate = mp4ac.sample_rate;
692 *output_sample_rate = mp4ac.ext_sample_rate;
697 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
698 AVCodecParameters *par,
701 switch (par->codec_id) {
702 case AV_CODEC_ID_VORBIS:
703 case AV_CODEC_ID_THEORA:
704 return put_xiph_codecpriv(s, dyn_cp, par);
705 case AV_CODEC_ID_FLAC:
706 return put_flac_codecpriv(s, dyn_cp, par);
707 case AV_CODEC_ID_WAVPACK:
708 return put_wv_codecpriv(dyn_cp, par);
709 case AV_CODEC_ID_H264:
710 return ff_isom_write_avcc(dyn_cp, par->extradata,
711 par->extradata_size);
712 case AV_CODEC_ID_HEVC:
713 return ff_isom_write_hvcc(dyn_cp, par->extradata,
714 par->extradata_size, 0);
715 case AV_CODEC_ID_AV1:
716 if (par->extradata_size)
717 return ff_isom_write_av1c(dyn_cp, par->extradata,
718 par->extradata_size);
720 put_ebml_void(pb, 4 + 3);
722 case AV_CODEC_ID_ALAC:
723 if (par->extradata_size < 36) {
724 av_log(s, AV_LOG_ERROR,
725 "Invalid extradata found, ALAC expects a 36-byte "
727 return AVERROR_INVALIDDATA;
729 avio_write(dyn_cp, par->extradata + 12,
730 par->extradata_size - 12);
732 case AV_CODEC_ID_AAC:
733 if (par->extradata_size)
734 avio_write(dyn_cp, par->extradata, par->extradata_size);
736 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
739 if (par->codec_id == AV_CODEC_ID_PRORES &&
740 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
741 avio_wl32(dyn_cp, par->codec_tag);
742 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
743 avio_write(dyn_cp, par->extradata, par->extradata_size);
749 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
750 AVCodecParameters *par,
751 int native_id, int qt_id)
755 int ret, codecpriv_size;
757 ret = avio_open_dyn_buf(&dyn_cp);
762 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
763 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
766 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
768 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
769 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
772 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
773 avio_wl32(dyn_cp, par->codec_tag);
774 for(i = 0; i < 0x5a - 8; i++)
777 avio_write(dyn_cp, par->extradata, par->extradata_size);
779 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
780 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
781 avcodec_get_name(par->codec_id));
784 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
786 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
787 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
788 avcodec_get_name(par->codec_id));
789 ret = AVERROR(EINVAL);
792 ff_put_bmp_header(dyn_cp, par, 0, 0);
794 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
796 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
798 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
799 avcodec_get_name(par->codec_id));
800 ret = AVERROR(EINVAL);
803 par->codec_tag = tag;
805 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
808 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
810 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
812 ffio_free_dyn_buf(&dyn_cp);
816 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
818 uint8_t *colorinfo_ptr;
819 int side_data_size = 0;
820 int ret, colorinfo_size;
821 const uint8_t *side_data;
823 ret = avio_open_dyn_buf(&dyn_cp);
827 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
828 par->color_trc < AVCOL_TRC_NB) {
829 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
832 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
833 par->color_space < AVCOL_SPC_NB) {
834 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
836 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
837 par->color_primaries < AVCOL_PRI_NB) {
838 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
840 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
841 par->color_range < AVCOL_RANGE_NB) {
842 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
844 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
845 par->chroma_location <= AVCHROMA_LOC_TOP) {
848 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
849 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
850 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
853 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
855 if (side_data_size) {
856 const AVContentLightMetadata *metadata =
857 (const AVContentLightMetadata*)side_data;
858 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
859 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
862 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
864 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
865 ebml_master meta_element = start_ebml_master(
866 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
867 const AVMasteringDisplayMetadata *metadata =
868 (const AVMasteringDisplayMetadata*)side_data;
869 if (metadata->has_primaries) {
870 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
871 av_q2d(metadata->display_primaries[0][0]));
872 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
873 av_q2d(metadata->display_primaries[0][1]));
874 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
875 av_q2d(metadata->display_primaries[1][0]));
876 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
877 av_q2d(metadata->display_primaries[1][1]));
878 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
879 av_q2d(metadata->display_primaries[2][0]));
880 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
881 av_q2d(metadata->display_primaries[2][1]));
882 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
883 av_q2d(metadata->white_point[0]));
884 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
885 av_q2d(metadata->white_point[1]));
887 if (metadata->has_luminance) {
888 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
889 av_q2d(metadata->max_luminance));
890 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
891 av_q2d(metadata->min_luminance));
893 end_ebml_master(dyn_cp, meta_element);
896 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
897 if (colorinfo_size) {
898 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
899 avio_write(pb, colorinfo_ptr, colorinfo_size);
900 end_ebml_master(pb, colorinfo);
902 ffio_free_dyn_buf(&dyn_cp);
906 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
909 ebml_master projection;
910 int side_data_size = 0;
913 const AVSphericalMapping *spherical =
914 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
920 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
921 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
922 spherical->projection != AV_SPHERICAL_CUBEMAP) {
923 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
927 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
928 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
929 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
930 4 * (2 + 1 + 8) + (2 + 1 + 20));
932 switch (spherical->projection) {
933 case AV_SPHERICAL_EQUIRECTANGULAR:
934 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
935 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
937 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
938 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
939 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
940 AV_WB32(private, 0); // version + flags
941 AV_WB32(private + 4, spherical->bound_top);
942 AV_WB32(private + 8, spherical->bound_bottom);
943 AV_WB32(private + 12, spherical->bound_left);
944 AV_WB32(private + 16, spherical->bound_right);
945 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
948 case AV_SPHERICAL_CUBEMAP:
949 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
950 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
951 AV_WB32(private, 0); // version + flags
952 AV_WB32(private + 4, 0); // layout
953 AV_WB32(private + 8, spherical->padding);
954 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
962 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
963 (double) spherical->yaw / (1 << 16));
964 if (spherical->pitch)
965 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
966 (double) spherical->pitch / (1 << 16));
968 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
969 (double) spherical->roll / (1 << 16));
971 end_ebml_master(pb, projection);
976 static void mkv_write_field_order(AVIOContext *pb, int mode,
977 enum AVFieldOrder field_order)
979 switch (field_order) {
980 case AV_FIELD_UNKNOWN:
982 case AV_FIELD_PROGRESSIVE:
983 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
984 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
990 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
991 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
992 if (mode != MODE_WEBM) {
993 switch (field_order) {
995 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
996 MATROSKA_VIDEO_FIELDORDER_TT);
999 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1000 MATROSKA_VIDEO_FIELDORDER_BB);
1003 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1004 MATROSKA_VIDEO_FIELDORDER_TB);
1007 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1008 MATROSKA_VIDEO_FIELDORDER_BT);
1015 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1016 AVStream *st, int mode, int *h_width, int *h_height)
1020 AVDictionaryEntry *tag;
1021 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1025 // convert metadata into proper side data and add it to the stream
1026 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1027 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1028 int stereo_mode = atoi(tag->value);
1030 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1031 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1036 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1037 stereo_mode != 10 && stereo_mode != 12) {
1038 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1044 // iterate to find the stereo3d side data
1045 for (i = 0; i < st->nb_side_data; i++) {
1046 AVPacketSideData sd = st->side_data[i];
1047 if (sd.type == AV_PKT_DATA_STEREO3D) {
1048 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1050 switch (stereo->type) {
1051 case AV_STEREO3D_2D:
1052 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1054 case AV_STEREO3D_SIDEBYSIDE:
1055 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1056 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1057 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1060 case AV_STEREO3D_TOPBOTTOM:
1061 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1062 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1066 case AV_STEREO3D_CHECKERBOARD:
1067 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1068 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1071 case AV_STEREO3D_LINES:
1072 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1073 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1077 case AV_STEREO3D_COLUMNS:
1078 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1079 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1083 case AV_STEREO3D_FRAMESEQUENCE:
1084 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1085 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1093 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1096 // if webm, do not write unsupported modes
1097 if ((mode == MODE_WEBM &&
1098 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1099 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1100 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1101 av_log(s, AV_LOG_ERROR,
1102 "The specified stereo mode is not valid.\n");
1103 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1104 return AVERROR(EINVAL);
1107 // write StereoMode if format is valid
1108 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1113 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1114 int i, AVIOContext *pb, int default_stream_exists)
1116 AVStream *st = s->streams[i];
1117 AVCodecParameters *par = st->codecpar;
1118 ebml_master subinfo, track;
1121 int bit_depth = av_get_bits_per_sample(par->codec_id);
1122 int sample_rate = par->sample_rate;
1123 int output_sample_rate = 0;
1124 int display_width_div = 1;
1125 int display_height_div = 1;
1127 AVDictionaryEntry *tag;
1129 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1130 mkv->have_attachments = 1;
1134 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1135 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1136 if (par->bits_per_raw_sample)
1137 bit_depth = par->bits_per_raw_sample;
1139 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1142 bit_depth = par->bits_per_coded_sample;
1145 if (par->codec_id == AV_CODEC_ID_AAC) {
1146 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1147 &output_sample_rate);
1152 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1153 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1154 mkv->is_dash ? mkv->dash_track_number : i + 1);
1155 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1156 mkv->is_dash ? mkv->dash_track_number : i + 1);
1157 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1159 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1160 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1161 tag = av_dict_get(st->metadata, "language", NULL, 0);
1162 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1163 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1164 } else if (tag && tag->value) {
1165 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1168 // The default value for TRACKFLAGDEFAULT is 1, so add element
1169 // if we need to clear it.
1170 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1171 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1173 if (st->disposition & AV_DISPOSITION_FORCED)
1174 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1176 if (mkv->mode == MODE_WEBM) {
1177 const char *codec_id;
1178 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1179 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1180 if (ff_webm_codec_tags[j].id == par->codec_id) {
1181 codec_id = ff_webm_codec_tags[j].str;
1186 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1187 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1188 codec_id = "D_WEBVTT/CAPTIONS";
1189 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1190 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1191 codec_id = "D_WEBVTT/DESCRIPTIONS";
1192 native_id = MATROSKA_TRACK_TYPE_METADATA;
1193 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1194 codec_id = "D_WEBVTT/METADATA";
1195 native_id = MATROSKA_TRACK_TYPE_METADATA;
1197 codec_id = "D_WEBVTT/SUBTITLES";
1198 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1203 av_log(s, AV_LOG_ERROR,
1204 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1205 return AVERROR(EINVAL);
1208 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1210 // look for a codec ID string specific to mkv to use,
1211 // if none are found, use AVI codes
1212 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1213 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1214 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1215 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1221 if (mkv->allow_raw_vfw) {
1224 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1225 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1226 return AVERROR(EINVAL);
1231 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1232 int64_t codecdelay = av_rescale_q(par->initial_padding,
1233 (AVRational){ 1, 48000 },
1234 (AVRational){ 1, 1000000000 });
1235 if (codecdelay < 0) {
1236 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1237 return AVERROR(EINVAL);
1239 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1240 // (AVRational){ 1, par->sample_rate },
1243 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1245 if (par->codec_id == AV_CODEC_ID_OPUS) {
1246 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1249 switch (par->codec_type) {
1250 case AVMEDIA_TYPE_VIDEO:
1251 mkv->have_video = 1;
1252 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1254 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1255 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1256 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1257 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1258 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1259 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1262 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1263 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1264 par->codec_id == AV_CODEC_ID_SVQ1 ||
1265 par->codec_id == AV_CODEC_ID_SVQ3 ||
1266 par->codec_id == AV_CODEC_ID_CINEPAK))
1270 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1271 else if (!native_id) {
1272 // if there is no mkv-specific codec ID, use VFW mode
1273 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1274 mkv->tracks[i].write_dts = 1;
1275 s->internal->avoid_negative_ts_use_pts = 0;
1278 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1280 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1281 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1283 mkv_write_field_order(pb, mkv->mode, par->field_order);
1285 // check both side data and metadata for stereo information,
1286 // write the result to the bitstream if any is found
1287 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1289 &display_height_div);
1293 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1294 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1295 (par->format == AV_PIX_FMT_YUVA420P)) {
1296 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1299 // write DisplayWidth and DisplayHeight, they contain the size of
1300 // a single source view and/or the display aspect ratio
1301 if (st->sample_aspect_ratio.num) {
1302 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1303 if (d_width > INT_MAX) {
1304 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1305 return AVERROR(EINVAL);
1307 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1308 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1309 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1310 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1312 AVRational display_aspect_ratio;
1313 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1314 par->width * (int64_t)st->sample_aspect_ratio.num,
1315 par->height * (int64_t)st->sample_aspect_ratio.den,
1317 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1318 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1319 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1322 } else if (display_width_div != 1 || display_height_div != 1) {
1323 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1324 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1325 } else if (mkv->mode != MODE_WEBM)
1326 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1328 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1329 uint32_t color_space = av_le2ne32(par->codec_tag);
1330 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1332 ret = mkv_write_video_color(pb, par, st);
1335 ret = mkv_write_video_projection(s, pb, st);
1338 end_ebml_master(pb, subinfo);
1341 case AVMEDIA_TYPE_AUDIO:
1342 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1345 // no mkv-specific ID, use ACM mode
1346 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1348 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1349 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1351 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1352 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1353 if (output_sample_rate)
1354 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1356 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1357 end_ebml_master(pb, subinfo);
1360 case AVMEDIA_TYPE_SUBTITLE:
1362 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1363 return AVERROR(ENOSYS);
1366 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1367 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1369 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1372 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1373 return AVERROR(EINVAL);
1376 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1377 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1378 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1383 end_ebml_master(pb, track);
1388 static int mkv_write_tracks(AVFormatContext *s)
1390 MatroskaMuxContext *mkv = s->priv_data;
1391 AVIOContext *pb = s->pb;
1392 int i, ret, default_stream_exists = 0;
1394 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1396 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1400 for (i = 0; i < s->nb_streams; i++) {
1401 AVStream *st = s->streams[i];
1402 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1404 for (i = 0; i < s->nb_streams; i++) {
1405 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1410 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1411 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, &mkv->tracks_pos);
1413 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
1418 static int mkv_write_chapters(AVFormatContext *s)
1420 MatroskaMuxContext *mkv = s->priv_data;
1421 AVIOContext *dyn_cp, *pb = s->pb;
1422 ebml_master editionentry;
1423 AVRational scale = {1, 1E9};
1426 if (!s->nb_chapters || mkv->wrote_chapters)
1429 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1431 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1432 if (ret < 0) return ret;
1434 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1435 if (mkv->mode != MODE_WEBM) {
1436 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1437 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1439 for (i = 0; i < s->nb_chapters; i++) {
1440 ebml_master chapteratom, chapterdisplay;
1441 AVChapter *c = s->chapters[i];
1442 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1443 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1444 AVDictionaryEntry *t = NULL;
1445 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1446 av_log(s, AV_LOG_ERROR,
1447 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1448 chapterstart, chapterend);
1449 return AVERROR_INVALIDDATA;
1452 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1453 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1454 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1455 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1456 if (mkv->mode != MODE_WEBM) {
1457 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1458 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1460 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1461 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1462 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1463 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1464 end_ebml_master(dyn_cp, chapterdisplay);
1466 end_ebml_master(dyn_cp, chapteratom);
1468 end_ebml_master(dyn_cp, editionentry);
1469 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1471 mkv->wrote_chapters = 1;
1475 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1477 uint8_t *key = av_strdup(t->key);
1479 const uint8_t *lang = NULL;
1483 return AVERROR(ENOMEM);
1485 if ((p = strrchr(p, '-')) &&
1486 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1493 else if (*p >= 'a' && *p <= 'z')
1498 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1499 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1501 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1502 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1503 end_ebml_master(pb, tag);
1509 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1510 unsigned int uid, ebml_master *tag)
1513 MatroskaMuxContext *mkv = s->priv_data;
1514 ebml_master targets;
1517 if (!mkv->tags_bc) {
1518 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1520 ret = start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1526 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1527 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1529 put_ebml_uint(pb, elementid, uid);
1530 end_ebml_master(pb, targets);
1534 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1536 return av_strcasecmp(name, "title") &&
1537 av_strcasecmp(name, "stereo_mode") &&
1538 av_strcasecmp(name, "creation_time") &&
1539 av_strcasecmp(name, "encoding_tool") &&
1540 av_strcasecmp(name, "duration") &&
1541 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1542 av_strcasecmp(name, "language")) &&
1543 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1544 (av_strcasecmp(name, "filename") &&
1545 av_strcasecmp(name, "mimetype")));
1548 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1551 MatroskaMuxContext *mkv = s->priv_data;
1554 AVDictionaryEntry *t = NULL;
1556 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1560 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1561 if (mkv_check_tag_name(t->key, elementid)) {
1562 ret = mkv_write_simpletag(mkv->tags_bc, t);
1568 end_ebml_master(mkv->tags_bc, tag);
1572 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1574 AVDictionaryEntry *t = NULL;
1576 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1577 if (mkv_check_tag_name(t->key, elementid))
1583 static int mkv_write_tags(AVFormatContext *s)
1585 MatroskaMuxContext *mkv = s->priv_data;
1588 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1590 if (mkv_check_tag(s->metadata, 0)) {
1591 ret = mkv_write_tag(s, s->metadata, 0, 0);
1592 if (ret < 0) return ret;
1595 for (i = 0; i < s->nb_streams; i++) {
1596 AVStream *st = s->streams[i];
1598 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1601 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1604 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1605 if (ret < 0) return ret;
1608 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1609 for (i = 0; i < s->nb_streams; i++) {
1611 AVStream *st = s->streams[i];
1612 ebml_master tag_target;
1615 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1618 ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
1619 i + 1, &tag_target);
1624 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1625 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1626 mkv->tracks[i].duration_offset = avio_tell(pb);
1628 // Reserve space to write duration as a 20-byte string.
1629 // 2 (ebml id) + 1 (data size) + 20 (data)
1630 put_ebml_void(pb, 23);
1631 end_ebml_master(pb, tag);
1632 end_ebml_master(pb, tag_target);
1636 if (mkv->mode != MODE_WEBM) {
1637 for (i = 0; i < s->nb_chapters; i++) {
1638 AVChapter *ch = s->chapters[i];
1640 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1643 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1649 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1650 for (i = 0; i < mkv->attachments->num_entries; i++) {
1651 mkv_attachment *attachment = &mkv->attachments->entries[i];
1652 AVStream *st = s->streams[attachment->stream_idx];
1654 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1657 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1664 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1665 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, &mkv->tags_pos);
1667 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv);
1672 static int mkv_write_attachments(AVFormatContext *s)
1674 MatroskaMuxContext *mkv = s->priv_data;
1675 AVIOContext *dyn_cp, *pb = s->pb;
1679 if (!mkv->have_attachments)
1682 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1683 if (!mkv->attachments)
1684 return AVERROR(ENOMEM);
1686 av_lfg_init(&c, av_get_random_seed());
1688 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1690 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1691 if (ret < 0) return ret;
1693 for (i = 0; i < s->nb_streams; i++) {
1694 AVStream *st = s->streams[i];
1695 ebml_master attached_file;
1696 mkv_attachment *attachment = mkv->attachments->entries;
1697 AVDictionaryEntry *t;
1698 const char *mimetype = NULL;
1701 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1704 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1706 return AVERROR(ENOMEM);
1707 mkv->attachments->entries = attachment;
1709 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1711 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1712 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1713 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1714 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1715 return AVERROR(EINVAL);
1717 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1718 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1719 mimetype = t->value;
1720 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1722 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1723 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1724 mimetype = ff_mkv_mime_tags[i].str;
1727 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1728 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1729 mimetype = ff_mkv_image_mime_tags[i].str;
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 if (s->flags & AVFMT_FLAG_BITEXACT) {
1740 struct AVSHA *sha = av_sha_alloc();
1743 return AVERROR(ENOMEM);
1744 av_sha_init(sha, 160);
1745 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1746 av_sha_final(sha, digest);
1748 fileuid = AV_RL32(digest);
1750 fileuid = av_lfg_get(&c);
1752 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1753 fileuid, mkv->attachments->num_entries);
1755 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1756 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1757 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1758 end_ebml_master(dyn_cp, attached_file);
1760 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1761 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1763 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1768 static int64_t get_metadata_duration(AVFormatContext *s)
1774 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1775 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1776 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1780 for (i = 0; i < s->nb_streams; i++) {
1782 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1784 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1785 max = FFMAX(max, us);
1788 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1792 static int mkv_write_header(AVFormatContext *s)
1794 MatroskaMuxContext *mkv = s->priv_data;
1795 AVIOContext *pb = s->pb;
1796 ebml_master ebml_header;
1797 AVDictionaryEntry *tag;
1798 int ret, i, version = 2;
1799 int64_t creation_time;
1801 if (!strcmp(s->oformat->name, "webm")) {
1802 mkv->mode = MODE_WEBM;
1805 mkv->mode = MODE_MATROSKAv2;
1807 if (mkv->mode != MODE_WEBM ||
1808 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1809 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1812 for (i = 0; i < s->nb_streams; i++) {
1813 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1814 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1815 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1819 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1821 return AVERROR(ENOMEM);
1823 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1824 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1825 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1826 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1827 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1828 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1829 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1830 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1831 end_ebml_master(pb, ebml_header);
1833 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1834 mkv->segment_offset = avio_tell(pb);
1836 // we write a seek head at the beginning to point to all other level
1837 // one elements (except Clusters).
1838 mkv_start_seekhead(mkv, pb);
1840 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1842 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1847 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1848 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1849 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1850 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1851 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1852 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1853 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1855 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1857 if (mkv->mode != MODE_WEBM) {
1858 uint32_t segment_uid[4];
1861 av_lfg_init(&lfg, av_get_random_seed());
1863 for (i = 0; i < 4; i++)
1864 segment_uid[i] = av_lfg_get(&lfg);
1866 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1869 const char *ident = "Lavf";
1870 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1871 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1874 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1875 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1876 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1877 uint8_t date_utc_buf[8];
1878 AV_WB64(date_utc_buf, date_utc);
1879 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1882 // reserve space for the duration
1884 mkv->duration_offset = avio_tell(pb);
1885 if (!mkv->is_live) {
1886 int64_t metadata_duration = get_metadata_duration(s);
1888 if (s->duration > 0) {
1889 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1890 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1891 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1892 } else if (metadata_duration > 0) {
1893 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1894 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1895 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1897 put_ebml_void(pb, 11); // assumes double-precision float to be written
1900 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1901 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, &mkv->info_pos);
1903 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv);
1906 ret = mkv_write_tracks(s);
1910 for (i = 0; i < s->nb_chapters; i++)
1911 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1913 ret = mkv_write_chapters(s);
1917 if (mkv->mode != MODE_WEBM) {
1918 ret = mkv_write_attachments(s);
1923 ret = mkv_write_tags(s);
1927 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1928 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1933 mkv->cues = mkv_start_cues(mkv->segment_offset);
1935 return AVERROR(ENOMEM);
1938 if (s->metadata_header_padding > 0) {
1939 if (s->metadata_header_padding == 1)
1940 s->metadata_header_padding++;
1941 put_ebml_void(pb, s->metadata_header_padding);
1944 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1945 mkv->cues_pos = avio_tell(pb);
1946 if (mkv->reserve_cues_space == 1)
1947 mkv->reserve_cues_space++;
1948 put_ebml_void(pb, mkv->reserve_cues_space);
1951 av_init_packet(&mkv->cur_audio_pkt);
1952 mkv->cur_audio_pkt.size = 0;
1953 mkv->cluster_pos = -1;
1955 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1956 // after 4k and on a keyframe
1957 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1958 if (mkv->cluster_time_limit < 0)
1959 mkv->cluster_time_limit = 5000;
1960 if (mkv->cluster_size_limit < 0)
1961 mkv->cluster_size_limit = 5 * 1024 * 1024;
1963 if (mkv->cluster_time_limit < 0)
1964 mkv->cluster_time_limit = 1000;
1965 if (mkv->cluster_size_limit < 0)
1966 mkv->cluster_size_limit = 32 * 1024;
1972 static int mkv_blockgroup_size(int pkt_size)
1974 int size = pkt_size + 4;
1975 size += ebml_num_size(size);
1976 size += 2; // EBML ID for block and block duration
1977 size += 9; // max size of block duration incl. length field
1981 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1988 dst = av_malloc(srclen);
1990 return AVERROR(ENOMEM);
1992 while (srclen >= WV_HEADER_SIZE) {
1995 ret = ff_wv_parse_header(&header, src);
1998 src += WV_HEADER_SIZE;
1999 srclen -= WV_HEADER_SIZE;
2001 if (srclen < header.blocksize) {
2002 ret = AVERROR_INVALIDDATA;
2006 if (header.initial) {
2007 AV_WL32(dst + offset, header.samples);
2010 AV_WL32(dst + offset, header.flags);
2011 AV_WL32(dst + offset + 4, header.crc);
2014 if (!(header.initial && header.final)) {
2015 AV_WL32(dst + offset, header.blocksize);
2019 memcpy(dst + offset, src, header.blocksize);
2020 src += header.blocksize;
2021 srclen -= header.blocksize;
2022 offset += header.blocksize;
2034 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2035 uint32_t blockid, AVPacket *pkt, int keyframe)
2037 MatroskaMuxContext *mkv = s->priv_data;
2038 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2039 mkv_track *track = &mkv->tracks[pkt->stream_index];
2040 uint8_t *data = NULL, *side_data = NULL;
2041 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2042 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2043 uint64_t additional_id = 0;
2044 int64_t discard_padding = 0;
2045 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2046 ebml_master block_group, block_additions, block_more;
2048 ts += track->ts_offset;
2050 /* The following string is identical to the one in mkv_write_vtt_blocks
2051 * so that only one copy needs to exist in binaries. */
2052 av_log(s, AV_LOG_DEBUG,
2053 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2054 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2055 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2056 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2057 mkv->cluster_pos, track_number, keyframe != 0);
2059 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2060 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2061 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2062 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2063 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2064 /* extradata is Annex B, assume the bitstream is too and convert it */
2065 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2066 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2067 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2068 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2069 err = mkv_strip_wavpack(pkt->data, &data, &size);
2074 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2075 "a packet from stream %d.\n", pkt->stream_index);
2079 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2080 /* Matroska specification requires to remove the first QuickTime atom
2086 side_data = av_packet_get_side_data(pkt,
2087 AV_PKT_DATA_SKIP_SAMPLES,
2089 if (side_data && side_data_size >= 10) {
2090 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2091 (AVRational){1, par->sample_rate},
2092 (AVRational){1, 1000000000});
2095 side_data = av_packet_get_side_data(pkt,
2096 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2099 if (side_data_size < 8) {
2102 additional_id = AV_RB64(side_data);
2104 side_data_size -= 8;
2108 if ((side_data_size && additional_id == 1) || discard_padding) {
2109 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2110 blockid = MATROSKA_ID_BLOCK;
2113 put_ebml_id(pb, blockid);
2114 put_ebml_num(pb, size + 4, 0);
2115 // this assumes stream_index is less than 126
2116 avio_w8(pb, 0x80 | track_number);
2117 avio_wb16(pb, ts - mkv->cluster_pts);
2118 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2119 avio_write(pb, data + offset, size);
2120 if (data != pkt->data)
2123 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2124 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2126 track->last_timestamp = ts;
2128 if (discard_padding) {
2129 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2132 if (side_data_size && additional_id == 1) {
2133 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2134 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2135 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2136 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2137 put_ebml_num(pb, side_data_size, 0);
2138 avio_write(pb, side_data, side_data_size);
2139 end_ebml_master(pb, block_more);
2140 end_ebml_master(pb, block_additions);
2142 if ((side_data_size && additional_id == 1) || discard_padding) {
2143 end_ebml_master(pb, block_group);
2149 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2151 MatroskaMuxContext *mkv = s->priv_data;
2152 ebml_master blockgroup;
2153 int id_size, settings_size, size;
2154 uint8_t *id, *settings;
2155 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2156 const int flags = 0;
2159 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2163 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2166 size = id_size + 1 + settings_size + 1 + pkt->size;
2168 /* The following string is identical to the one in mkv_write_block so that
2169 * only one copy needs to exist in binaries. */
2170 av_log(s, AV_LOG_DEBUG,
2171 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2172 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2173 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2174 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2175 mkv->cluster_pos, pkt->stream_index + 1, 1);
2177 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2179 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2180 put_ebml_num(pb, size + 4, 0);
2181 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2182 avio_wb16(pb, ts - mkv->cluster_pts);
2184 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2186 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2187 end_ebml_master(pb, blockgroup);
2189 return pkt->duration;
2192 static void mkv_end_cluster(AVFormatContext *s)
2194 MatroskaMuxContext *mkv = s->priv_data;
2196 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2197 mkv->cluster_pos = -1;
2198 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2201 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2203 MatroskaMuxContext *mkv = s->priv_data;
2204 mkv_track *track = &mkv->tracks[pkt->stream_index];
2205 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2207 int side_data_size = 0, ret;
2209 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2212 switch (par->codec_id) {
2213 case AV_CODEC_ID_AAC:
2214 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2215 int filler, output_sample_rate = 0;
2217 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2218 &output_sample_rate);
2221 if (!output_sample_rate)
2222 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2223 ret = ff_alloc_extradata(par, side_data_size);
2226 memcpy(par->extradata, side_data, side_data_size);
2227 curpos = avio_tell(mkv->tracks_bc);
2228 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2229 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2230 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2232 put_ebml_void(mkv->tracks_bc, filler);
2233 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2234 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2235 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2236 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2237 } else if (!par->extradata_size && !track->sample_rate) {
2238 // No extradata (codecpar or packet side data).
2239 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2240 return AVERROR(EINVAL);
2243 case AV_CODEC_ID_FLAC:
2244 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2245 AVCodecParameters *codecpriv_par;
2247 if (side_data_size != par->extradata_size) {
2248 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2250 return AVERROR(EINVAL);
2252 codecpriv_par = avcodec_parameters_alloc();
2254 return AVERROR(ENOMEM);
2255 ret = avcodec_parameters_copy(codecpriv_par, par);
2257 avcodec_parameters_free(&codecpriv_par);
2260 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2261 curpos = avio_tell(mkv->tracks_bc);
2262 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2263 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2264 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2265 avcodec_parameters_free(&codecpriv_par);
2268 // FIXME: Remove the following once libaom starts propagating extradata during init()
2269 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2270 case AV_CODEC_ID_AV1:
2271 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2272 !par->extradata_size) {
2273 AVIOContext *dyn_cp;
2277 ret = avio_open_dyn_buf(&dyn_cp);
2280 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2281 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2282 if (!codecpriv_size) {
2284 return AVERROR_INVALIDDATA;
2286 curpos = avio_tell(mkv->tracks_bc);
2287 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2288 // Do not write the OBUs as we don't have space saved for them
2289 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2291 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2292 ret = ff_alloc_extradata(par, side_data_size);
2295 memcpy(par->extradata, side_data, side_data_size);
2296 } else if (!par->extradata_size)
2297 return AVERROR_INVALIDDATA;
2301 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2308 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2310 MatroskaMuxContext *mkv = s->priv_data;
2312 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2313 mkv_track *track = &mkv->tracks[pkt->stream_index];
2314 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2315 int duration = pkt->duration;
2317 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2318 int64_t relative_packet_pos;
2319 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2321 if (ts == AV_NOPTS_VALUE) {
2322 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2323 return AVERROR(EINVAL);
2325 ts += track->ts_offset;
2327 if (mkv->cluster_pos != -1) {
2328 int64_t cluster_time = ts - mkv->cluster_pts;
2329 if ((int16_t)cluster_time != cluster_time) {
2331 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2335 if (mkv->cluster_pos == -1) {
2336 mkv->cluster_pos = avio_tell(s->pb);
2337 ret = start_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2340 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2341 mkv->cluster_pts = FFMAX(0, ts);
2342 av_log(s, AV_LOG_DEBUG,
2343 "Starting new cluster with timestamp "
2344 "%" PRId64 " at offset %" PRId64 " bytes\n",
2345 mkv->cluster_pts, mkv->cluster_pos);
2347 pb = mkv->cluster_bc;
2349 relative_packet_pos = avio_tell(pb);
2351 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2352 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2355 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2356 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2357 if (ret < 0) return ret;
2360 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2361 duration = mkv_write_vtt_blocks(s, pb, pkt);
2363 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2364 mkv_blockgroup_size(pkt->size));
2366 #if FF_API_CONVERGENCE_DURATION
2367 FF_DISABLE_DEPRECATION_WARNINGS
2368 /* For backward compatibility, prefer convergence_duration. */
2369 if (pkt->convergence_duration > 0) {
2370 duration = pkt->convergence_duration;
2372 FF_ENABLE_DEPRECATION_WARNINGS
2374 /* All subtitle blocks are considered to be keyframes. */
2375 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2376 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2377 end_ebml_master(pb, blockgroup);
2380 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2381 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts,
2382 mkv->cluster_pos, relative_packet_pos, duration);
2388 mkv->duration = FFMAX(mkv->duration, ts + duration);
2389 track->duration = FFMAX(track->duration, ts + duration);
2394 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2396 MatroskaMuxContext *mkv = s->priv_data;
2397 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2398 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2400 int64_t cluster_time;
2402 int start_new_cluster;
2404 ret = mkv_check_new_extra_data(s, pkt);
2408 if (mkv->tracks[pkt->stream_index].write_dts)
2409 cluster_time = pkt->dts - mkv->cluster_pts;
2411 cluster_time = pkt->pts - mkv->cluster_pts;
2412 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2414 cluster_size = avio_tell(mkv->cluster_bc);
2416 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2417 // WebM DASH specification states that the first block of every cluster
2418 // has to be a key frame. So for DASH video, we only create a cluster
2419 // on seeing key frames.
2420 start_new_cluster = keyframe;
2421 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2422 (mkv->cluster_pos == -1 ||
2423 cluster_time > mkv->cluster_time_limit)) {
2424 // For DASH audio, we create a Cluster based on cluster_time_limit
2425 start_new_cluster = 1;
2426 } else if (!mkv->is_dash &&
2427 (cluster_size > mkv->cluster_size_limit ||
2428 cluster_time > mkv->cluster_time_limit ||
2429 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2430 cluster_size > 4 * 1024))) {
2431 start_new_cluster = 1;
2433 start_new_cluster = 0;
2436 if (mkv->cluster_pos != -1 && start_new_cluster) {
2440 if (!mkv->cluster_pos)
2441 avio_write_marker(s->pb,
2442 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2443 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2445 // check if we have an audio packet cached
2446 if (mkv->cur_audio_pkt.size > 0) {
2447 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2448 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2449 mkv->is_dash ? start_new_cluster : 0);
2450 av_packet_unref(&mkv->cur_audio_pkt);
2452 av_log(s, AV_LOG_ERROR,
2453 "Could not write cached audio packet ret:%d\n", ret);
2458 // buffer an audio packet to ensure the packet containing the video
2459 // keyframe's timecode is contained in the same cluster for WebM
2460 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2462 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2464 ret = mkv_write_packet_internal(s, pkt, 0);
2468 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2470 MatroskaMuxContext *mkv = s->priv_data;
2473 if (mkv->cluster_pos != -1) {
2475 av_log(s, AV_LOG_DEBUG,
2476 "Flushing cluster at offset %" PRIu64 " bytes\n",
2481 return mkv_write_packet(s, pkt);
2484 static int mkv_write_trailer(AVFormatContext *s)
2486 MatroskaMuxContext *mkv = s->priv_data;
2487 AVIOContext *pb = s->pb;
2488 int64_t currentpos, cuespos;
2491 // check if we have an audio packet cached
2492 if (mkv->cur_audio_pkt.size > 0) {
2493 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2495 av_log(s, AV_LOG_ERROR,
2496 "Could not write cached audio packet ret:%d\n", ret);
2501 if (mkv->cluster_bc) {
2502 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv);
2505 ret = mkv_write_chapters(s);
2510 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2511 if (mkv->cues->num_entries) {
2512 if (mkv->reserve_cues_space) {
2515 currentpos = avio_tell(pb);
2516 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2518 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2519 cues_end = avio_tell(pb);
2520 if (cues_end > cuespos + mkv->reserve_cues_space) {
2521 av_log(s, AV_LOG_ERROR,
2522 "Insufficient space reserved for cues: %d "
2523 "(needed: %" PRId64 ").\n",
2524 mkv->reserve_cues_space, cues_end - cuespos);
2525 return AVERROR(EINVAL);
2528 if (cues_end < cuespos + mkv->reserve_cues_space)
2529 put_ebml_void(pb, mkv->reserve_cues_space -
2530 (cues_end - cuespos));
2532 avio_seek(pb, currentpos, SEEK_SET);
2534 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2537 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2540 currentpos = avio_tell(pb);
2542 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2546 // update the duration
2547 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2548 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2549 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2550 end_ebml_master_crc32(pb, &mkv->info_bc, mkv);
2552 // write tracks master
2553 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2554 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
2556 // update stream durations
2557 if (!mkv->is_live) {
2559 int64_t curr = avio_tell(mkv->tags_bc);
2560 for (i = 0; i < s->nb_streams; ++i) {
2561 AVStream *st = s->streams[i];
2562 mkv_track *track = &mkv->tracks[i];
2564 if (track->duration_offset > 0) {
2565 double duration_sec = track->duration * av_q2d(st->time_base);
2566 char duration_string[20] = "";
2568 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2571 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2573 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2574 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2575 fmod(duration_sec, 60));
2577 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2580 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2582 if (mkv->tags_bc && !mkv->is_live) {
2583 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2584 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv);
2587 avio_seek(pb, currentpos, SEEK_SET);
2590 if (!mkv->is_live) {
2591 end_ebml_master(pb, mkv->segment);
2597 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2600 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2601 if (ff_mkv_codec_tags[i].id == codec_id)
2604 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2605 enum AVMediaType type = avcodec_get_type(codec_id);
2606 // mkv theoretically supports any video/audio through VFW/ACM
2607 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2614 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2617 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2618 if (ff_webm_codec_tags[i].id == codec_id)
2624 static int mkv_init(struct AVFormatContext *s)
2628 if (s->nb_streams > MAX_TRACKS) {
2629 av_log(s, AV_LOG_ERROR,
2630 "At most %d streams are supported for muxing in Matroska\n",
2632 return AVERROR(EINVAL);
2635 for (i = 0; i < s->nb_streams; i++) {
2636 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2637 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2638 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2639 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2640 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2641 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2642 av_log(s, AV_LOG_ERROR,
2643 "The Matroska muxer does not yet support muxing %s\n",
2644 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2645 return AVERROR_PATCHWELCOME;
2649 if (s->avoid_negative_ts < 0) {
2650 s->avoid_negative_ts = 1;
2651 s->internal->avoid_negative_ts_use_pts = 1;
2654 for (i = 0; i < s->nb_streams; i++) {
2655 // ms precision is the de-facto standard timescale for mkv files
2656 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2662 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2665 AVStream *st = s->streams[pkt->stream_index];
2667 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2668 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2669 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2670 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2671 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2677 static const AVCodecTag additional_audio_tags[] = {
2678 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2679 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2680 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2681 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2682 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2683 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2684 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2685 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2686 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2687 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2688 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2689 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2690 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2693 static const AVCodecTag additional_video_tags[] = {
2694 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2695 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2696 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2697 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2700 static const AVCodecTag additional_subtitle_tags[] = {
2701 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2702 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2703 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2704 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2707 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2708 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2709 static const AVOption options[] = {
2710 { "reserve_index_space", "Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues).", OFFSET(reserve_cues_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
2711 { "cluster_size_limit", "Store at most the provided amount of bytes in a cluster. ", OFFSET(cluster_size_limit), AV_OPT_TYPE_INT , { .i64 = -1 }, -1, INT_MAX, FLAGS },
2712 { "cluster_time_limit", "Store at most the provided number of milliseconds in a cluster.", OFFSET(cluster_time_limit), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, FLAGS },
2713 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2714 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2715 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2716 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2717 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2721 #if CONFIG_MATROSKA_MUXER
2722 static const AVClass matroska_class = {
2723 .class_name = "matroska muxer",
2724 .item_name = av_default_item_name,
2726 .version = LIBAVUTIL_VERSION_INT,
2729 AVOutputFormat ff_matroska_muxer = {
2731 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2732 .mime_type = "video/x-matroska",
2733 .extensions = "mkv",
2734 .priv_data_size = sizeof(MatroskaMuxContext),
2735 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2736 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2737 .video_codec = CONFIG_LIBX264_ENCODER ?
2738 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2740 .deinit = mkv_deinit,
2741 .write_header = mkv_write_header,
2742 .write_packet = mkv_write_flush_packet,
2743 .write_trailer = mkv_write_trailer,
2744 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2745 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2746 .codec_tag = (const AVCodecTag* const []){
2747 ff_codec_bmp_tags, ff_codec_wav_tags,
2748 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2750 .subtitle_codec = AV_CODEC_ID_ASS,
2751 .query_codec = mkv_query_codec,
2752 .check_bitstream = mkv_check_bitstream,
2753 .priv_class = &matroska_class,
2757 #if CONFIG_WEBM_MUXER
2758 static const AVClass webm_class = {
2759 .class_name = "webm muxer",
2760 .item_name = av_default_item_name,
2762 .version = LIBAVUTIL_VERSION_INT,
2765 AVOutputFormat ff_webm_muxer = {
2767 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2768 .mime_type = "video/webm",
2769 .extensions = "webm",
2770 .priv_data_size = sizeof(MatroskaMuxContext),
2771 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2772 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2773 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2775 .deinit = mkv_deinit,
2776 .write_header = mkv_write_header,
2777 .write_packet = mkv_write_flush_packet,
2778 .write_trailer = mkv_write_trailer,
2779 .query_codec = webm_query_codec,
2780 .check_bitstream = mkv_check_bitstream,
2781 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2782 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2783 .priv_class = &webm_class,
2787 #if CONFIG_MATROSKA_AUDIO_MUXER
2788 static const AVClass mka_class = {
2789 .class_name = "matroska audio muxer",
2790 .item_name = av_default_item_name,
2792 .version = LIBAVUTIL_VERSION_INT,
2794 AVOutputFormat ff_matroska_audio_muxer = {
2796 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2797 .mime_type = "audio/x-matroska",
2798 .extensions = "mka",
2799 .priv_data_size = sizeof(MatroskaMuxContext),
2800 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2801 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2802 .video_codec = AV_CODEC_ID_NONE,
2804 .deinit = mkv_deinit,
2805 .write_header = mkv_write_header,
2806 .write_packet = mkv_write_flush_packet,
2807 .write_trailer = mkv_write_trailer,
2808 .check_bitstream = mkv_check_bitstream,
2809 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2811 .codec_tag = (const AVCodecTag* const []){
2812 ff_codec_wav_tags, additional_audio_tags, 0
2814 .priv_class = &mka_class,