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 back to the initial position. 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; failure to seek back afterwards
443 * is always an error.
445 * @return 0 on success, < 0 on error.
447 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
448 int error_on_seek_failure)
451 mkv_seekhead *seekhead = &mkv->seekhead;
452 ebml_master seekentry;
453 int64_t currentpos, remaining, ret64;
456 currentpos = avio_tell(pb);
458 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
459 return error_on_seek_failure ? ret64 : 0;
461 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD);
465 for (i = 0; i < seekhead->num_entries; i++) {
466 mkv_seekhead_entry *entry = &seekhead->entries[i];
468 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
470 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
471 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
472 put_ebml_id(dyn_cp, entry->elementid);
474 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
475 end_ebml_master(dyn_cp, seekentry);
477 end_ebml_master_crc32(pb, &dyn_cp, mkv);
479 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
480 put_ebml_void(pb, remaining);
482 if ((ret64 = avio_seek(pb, currentpos, SEEK_SET)) < 0)
488 static mkv_cues *mkv_start_cues(int64_t segment_offset)
490 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
494 cues->segment_offset = segment_offset;
498 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
499 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
501 mkv_cuepoint *entries = cues->entries;
506 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
508 return AVERROR(ENOMEM);
509 cues->entries = entries;
511 cues->entries[cues->num_entries].pts = ts;
512 cues->entries[cues->num_entries].stream_idx = stream;
513 cues->entries[cues->num_entries].tracknum = tracknum;
514 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
515 cues->entries[cues->num_entries].relative_pos = relative_pos;
516 cues->entries[cues->num_entries++].duration = duration;
521 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
523 MatroskaMuxContext *mkv = s->priv_data;
524 AVIOContext *dyn_cp, *pb = s->pb;
528 currentpos = avio_tell(pb);
529 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
533 for (i = 0; i < cues->num_entries; i++) {
534 ebml_master cuepoint, track_positions;
535 mkv_cuepoint *entry = &cues->entries[i];
536 uint64_t pts = entry->pts;
539 // Calculate the number of entries, so we know the element size
540 for (j = 0; j < num_tracks; j++)
541 tracks[j].has_cue = 0;
542 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
543 int idx = entry[j].stream_idx;
545 av_assert0(idx >= 0 && idx < num_tracks);
546 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
548 tracks[idx].has_cue = 1;
552 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_CONTENT_SIZE(ctp_nb));
553 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
555 // put all the entries from different tracks that have the exact same
556 // timestamp into the same CuePoint
557 for (j = 0; j < num_tracks; j++)
558 tracks[j].has_cue = 0;
559 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
560 int idx = entry[j].stream_idx;
562 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
564 tracks[idx].has_cue = 1;
565 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
566 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
567 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
568 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
569 if (entry[j].duration != -1)
570 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
571 end_ebml_master(dyn_cp, track_positions);
574 end_ebml_master(dyn_cp, cuepoint);
576 end_ebml_master_crc32(pb, &dyn_cp, mkv);
581 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
583 const uint8_t *header_start[3];
585 int first_header_size;
588 if (par->codec_id == AV_CODEC_ID_VORBIS)
589 first_header_size = 30;
591 first_header_size = 42;
593 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
594 first_header_size, header_start, header_len) < 0) {
595 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
599 avio_w8(pb, 2); // number packets - 1
600 for (j = 0; j < 2; j++) {
601 put_xiph_size(pb, header_len[j]);
603 for (j = 0; j < 3; j++)
604 avio_write(pb, header_start[j], header_len[j]);
609 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
611 if (par->extradata && par->extradata_size == 2)
612 avio_write(pb, par->extradata, 2);
614 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
618 static int put_flac_codecpriv(AVFormatContext *s,
619 AVIOContext *pb, AVCodecParameters *par)
621 int write_comment = (par->channel_layout &&
622 !(par->channel_layout & ~0x3ffffULL) &&
623 !ff_flac_is_native_layout(par->channel_layout));
624 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
631 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
632 "Lavf" : LIBAVFORMAT_IDENT;
633 AVDictionary *dict = NULL;
634 uint8_t buf[32], *data, *p;
637 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
638 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
640 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
641 if (len >= ((1<<24) - 4)) {
643 return AVERROR(EINVAL);
646 data = av_malloc(len + 4);
649 return AVERROR(ENOMEM);
653 AV_WB24(data + 1, len);
656 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
658 avio_write(pb, data, len + 4);
667 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
668 int *sample_rate, int *output_sample_rate)
670 MPEG4AudioConfig mp4ac;
673 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
674 /* Don't abort if the failure is because of missing extradata. Assume in that
675 * case a bitstream filter will provide the muxer with the extradata in the
677 * Abort however if s->pb is not seekable, as we would not be able to seek back
678 * to write the sample rate elements once the extradata shows up, anyway. */
679 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
680 av_log(s, AV_LOG_ERROR,
681 "Error parsing AAC extradata, unable to determine samplerate.\n");
682 return AVERROR(EINVAL);
686 /* This will only happen when this function is called while writing the
687 * header and no extradata is available. The space for this element has
688 * to be reserved for when this function is called again after the
689 * extradata shows up in the first packet, as there's no way to know if
690 * output_sample_rate will be different than sample_rate or not. */
691 *output_sample_rate = *sample_rate;
693 *sample_rate = mp4ac.sample_rate;
694 *output_sample_rate = mp4ac.ext_sample_rate;
699 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
700 AVCodecParameters *par,
703 switch (par->codec_id) {
704 case AV_CODEC_ID_VORBIS:
705 case AV_CODEC_ID_THEORA:
706 return put_xiph_codecpriv(s, dyn_cp, par);
707 case AV_CODEC_ID_FLAC:
708 return put_flac_codecpriv(s, dyn_cp, par);
709 case AV_CODEC_ID_WAVPACK:
710 return put_wv_codecpriv(dyn_cp, par);
711 case AV_CODEC_ID_H264:
712 return ff_isom_write_avcc(dyn_cp, par->extradata,
713 par->extradata_size);
714 case AV_CODEC_ID_HEVC:
715 return ff_isom_write_hvcc(dyn_cp, par->extradata,
716 par->extradata_size, 0);
717 case AV_CODEC_ID_AV1:
718 if (par->extradata_size)
719 return ff_isom_write_av1c(dyn_cp, par->extradata,
720 par->extradata_size);
722 put_ebml_void(pb, 4 + 3);
724 case AV_CODEC_ID_ALAC:
725 if (par->extradata_size < 36) {
726 av_log(s, AV_LOG_ERROR,
727 "Invalid extradata found, ALAC expects a 36-byte "
729 return AVERROR_INVALIDDATA;
731 avio_write(dyn_cp, par->extradata + 12,
732 par->extradata_size - 12);
734 case AV_CODEC_ID_AAC:
735 if (par->extradata_size)
736 avio_write(dyn_cp, par->extradata, par->extradata_size);
738 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
741 if (par->codec_id == AV_CODEC_ID_PRORES &&
742 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
743 avio_wl32(dyn_cp, par->codec_tag);
744 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
745 avio_write(dyn_cp, par->extradata, par->extradata_size);
751 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
752 AVCodecParameters *par,
753 int native_id, int qt_id)
757 int ret, codecpriv_size;
759 ret = avio_open_dyn_buf(&dyn_cp);
764 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
765 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
768 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
770 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
771 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
774 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
775 avio_wl32(dyn_cp, par->codec_tag);
776 for(i = 0; i < 0x5a - 8; i++)
779 avio_write(dyn_cp, par->extradata, par->extradata_size);
781 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
782 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
783 avcodec_get_name(par->codec_id));
786 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
788 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
789 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
790 avcodec_get_name(par->codec_id));
791 ret = AVERROR(EINVAL);
794 ff_put_bmp_header(dyn_cp, par, 0, 0);
796 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
798 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
800 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
801 avcodec_get_name(par->codec_id));
802 ret = AVERROR(EINVAL);
805 par->codec_tag = tag;
807 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
810 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
812 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
814 ffio_free_dyn_buf(&dyn_cp);
818 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
820 uint8_t *colorinfo_ptr;
821 int side_data_size = 0;
822 int ret, colorinfo_size;
823 const uint8_t *side_data;
825 ret = avio_open_dyn_buf(&dyn_cp);
829 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
830 par->color_trc < AVCOL_TRC_NB) {
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
834 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
835 par->color_space < AVCOL_SPC_NB) {
836 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
838 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
839 par->color_primaries < AVCOL_PRI_NB) {
840 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
842 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
843 par->color_range < AVCOL_RANGE_NB) {
844 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
846 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
847 par->chroma_location <= AVCHROMA_LOC_TOP) {
850 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
851 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
852 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
855 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
857 if (side_data_size) {
858 const AVContentLightMetadata *metadata =
859 (const AVContentLightMetadata*)side_data;
860 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
861 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
864 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
866 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
867 ebml_master meta_element = start_ebml_master(
868 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
869 const AVMasteringDisplayMetadata *metadata =
870 (const AVMasteringDisplayMetadata*)side_data;
871 if (metadata->has_primaries) {
872 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
873 av_q2d(metadata->display_primaries[0][0]));
874 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
875 av_q2d(metadata->display_primaries[0][1]));
876 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
877 av_q2d(metadata->display_primaries[1][0]));
878 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
879 av_q2d(metadata->display_primaries[1][1]));
880 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
881 av_q2d(metadata->display_primaries[2][0]));
882 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
883 av_q2d(metadata->display_primaries[2][1]));
884 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
885 av_q2d(metadata->white_point[0]));
886 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
887 av_q2d(metadata->white_point[1]));
889 if (metadata->has_luminance) {
890 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
891 av_q2d(metadata->max_luminance));
892 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
893 av_q2d(metadata->min_luminance));
895 end_ebml_master(dyn_cp, meta_element);
898 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
899 if (colorinfo_size) {
900 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
901 avio_write(pb, colorinfo_ptr, colorinfo_size);
902 end_ebml_master(pb, colorinfo);
904 ffio_free_dyn_buf(&dyn_cp);
908 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
911 ebml_master projection;
912 int side_data_size = 0;
915 const AVSphericalMapping *spherical =
916 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
922 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
923 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
924 spherical->projection != AV_SPHERICAL_CUBEMAP) {
925 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
929 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
930 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
931 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
932 4 * (2 + 1 + 8) + (2 + 1 + 20));
934 switch (spherical->projection) {
935 case AV_SPHERICAL_EQUIRECTANGULAR:
936 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
937 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
939 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
940 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
941 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
942 AV_WB32(private, 0); // version + flags
943 AV_WB32(private + 4, spherical->bound_top);
944 AV_WB32(private + 8, spherical->bound_bottom);
945 AV_WB32(private + 12, spherical->bound_left);
946 AV_WB32(private + 16, spherical->bound_right);
947 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
950 case AV_SPHERICAL_CUBEMAP:
951 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
952 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
953 AV_WB32(private, 0); // version + flags
954 AV_WB32(private + 4, 0); // layout
955 AV_WB32(private + 8, spherical->padding);
956 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
964 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
965 (double) spherical->yaw / (1 << 16));
966 if (spherical->pitch)
967 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
968 (double) spherical->pitch / (1 << 16));
970 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
971 (double) spherical->roll / (1 << 16));
973 end_ebml_master(pb, projection);
978 static void mkv_write_field_order(AVIOContext *pb, int mode,
979 enum AVFieldOrder field_order)
981 switch (field_order) {
982 case AV_FIELD_UNKNOWN:
984 case AV_FIELD_PROGRESSIVE:
985 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
986 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
992 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
993 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
994 if (mode != MODE_WEBM) {
995 switch (field_order) {
997 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
998 MATROSKA_VIDEO_FIELDORDER_TT);
1001 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1002 MATROSKA_VIDEO_FIELDORDER_BB);
1005 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1006 MATROSKA_VIDEO_FIELDORDER_TB);
1009 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1010 MATROSKA_VIDEO_FIELDORDER_BT);
1017 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1018 AVStream *st, int mode, int *h_width, int *h_height)
1022 AVDictionaryEntry *tag;
1023 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1027 // convert metadata into proper side data and add it to the stream
1028 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1029 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1030 int stereo_mode = atoi(tag->value);
1032 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1033 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1038 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1039 stereo_mode != 10 && stereo_mode != 12) {
1040 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1046 // iterate to find the stereo3d side data
1047 for (i = 0; i < st->nb_side_data; i++) {
1048 AVPacketSideData sd = st->side_data[i];
1049 if (sd.type == AV_PKT_DATA_STEREO3D) {
1050 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1052 switch (stereo->type) {
1053 case AV_STEREO3D_2D:
1054 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1056 case AV_STEREO3D_SIDEBYSIDE:
1057 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1058 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1059 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1062 case AV_STEREO3D_TOPBOTTOM:
1063 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1064 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1068 case AV_STEREO3D_CHECKERBOARD:
1069 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1070 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1073 case AV_STEREO3D_LINES:
1074 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1075 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1079 case AV_STEREO3D_COLUMNS:
1080 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1081 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1085 case AV_STEREO3D_FRAMESEQUENCE:
1086 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1087 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1095 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1098 // if webm, do not write unsupported modes
1099 if ((mode == MODE_WEBM &&
1100 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1101 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1102 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1103 av_log(s, AV_LOG_ERROR,
1104 "The specified stereo mode is not valid.\n");
1105 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1106 return AVERROR(EINVAL);
1109 // write StereoMode if format is valid
1110 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1115 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1116 int i, AVIOContext *pb, int default_stream_exists)
1118 AVStream *st = s->streams[i];
1119 AVCodecParameters *par = st->codecpar;
1120 ebml_master subinfo, track;
1123 int bit_depth = av_get_bits_per_sample(par->codec_id);
1124 int sample_rate = par->sample_rate;
1125 int output_sample_rate = 0;
1126 int display_width_div = 1;
1127 int display_height_div = 1;
1129 AVDictionaryEntry *tag;
1131 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1132 mkv->have_attachments = 1;
1136 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1137 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1138 if (par->bits_per_raw_sample)
1139 bit_depth = par->bits_per_raw_sample;
1141 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1144 bit_depth = par->bits_per_coded_sample;
1147 if (par->codec_id == AV_CODEC_ID_AAC) {
1148 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1149 &output_sample_rate);
1154 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1155 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1156 mkv->is_dash ? mkv->dash_track_number : i + 1);
1157 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1158 mkv->is_dash ? mkv->dash_track_number : i + 1);
1159 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1161 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1162 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1163 tag = av_dict_get(st->metadata, "language", NULL, 0);
1164 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1165 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1166 } else if (tag && tag->value) {
1167 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1170 // The default value for TRACKFLAGDEFAULT is 1, so add element
1171 // if we need to clear it.
1172 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1173 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1175 if (st->disposition & AV_DISPOSITION_FORCED)
1176 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1178 if (mkv->mode == MODE_WEBM) {
1179 const char *codec_id;
1180 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1181 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1182 if (ff_webm_codec_tags[j].id == par->codec_id) {
1183 codec_id = ff_webm_codec_tags[j].str;
1188 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1189 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1190 codec_id = "D_WEBVTT/CAPTIONS";
1191 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1192 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1193 codec_id = "D_WEBVTT/DESCRIPTIONS";
1194 native_id = MATROSKA_TRACK_TYPE_METADATA;
1195 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1196 codec_id = "D_WEBVTT/METADATA";
1197 native_id = MATROSKA_TRACK_TYPE_METADATA;
1199 codec_id = "D_WEBVTT/SUBTITLES";
1200 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1205 av_log(s, AV_LOG_ERROR,
1206 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1207 return AVERROR(EINVAL);
1210 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1212 // look for a codec ID string specific to mkv to use,
1213 // if none are found, use AVI codes
1214 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1215 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1216 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1217 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1223 if (mkv->allow_raw_vfw) {
1226 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1227 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1228 return AVERROR(EINVAL);
1233 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1234 int64_t codecdelay = av_rescale_q(par->initial_padding,
1235 (AVRational){ 1, 48000 },
1236 (AVRational){ 1, 1000000000 });
1237 if (codecdelay < 0) {
1238 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1239 return AVERROR(EINVAL);
1241 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1242 // (AVRational){ 1, par->sample_rate },
1245 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1247 if (par->codec_id == AV_CODEC_ID_OPUS) {
1248 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1251 switch (par->codec_type) {
1252 case AVMEDIA_TYPE_VIDEO:
1253 mkv->have_video = 1;
1254 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1256 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1257 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1258 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1259 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1260 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1261 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1264 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1265 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1266 par->codec_id == AV_CODEC_ID_SVQ1 ||
1267 par->codec_id == AV_CODEC_ID_SVQ3 ||
1268 par->codec_id == AV_CODEC_ID_CINEPAK))
1272 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1273 else if (!native_id) {
1274 // if there is no mkv-specific codec ID, use VFW mode
1275 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1276 mkv->tracks[i].write_dts = 1;
1277 s->internal->avoid_negative_ts_use_pts = 0;
1280 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1282 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1283 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1285 mkv_write_field_order(pb, mkv->mode, par->field_order);
1287 // check both side data and metadata for stereo information,
1288 // write the result to the bitstream if any is found
1289 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1291 &display_height_div);
1295 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1296 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1297 (par->format == AV_PIX_FMT_YUVA420P)) {
1298 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1301 // write DisplayWidth and DisplayHeight, they contain the size of
1302 // a single source view and/or the display aspect ratio
1303 if (st->sample_aspect_ratio.num) {
1304 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1305 if (d_width > INT_MAX) {
1306 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1307 return AVERROR(EINVAL);
1309 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1310 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1311 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1312 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1314 AVRational display_aspect_ratio;
1315 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1316 par->width * (int64_t)st->sample_aspect_ratio.num,
1317 par->height * (int64_t)st->sample_aspect_ratio.den,
1319 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1320 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1321 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1324 } else if (display_width_div != 1 || display_height_div != 1) {
1325 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1326 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1327 } else if (mkv->mode != MODE_WEBM)
1328 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1330 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1331 uint32_t color_space = av_le2ne32(par->codec_tag);
1332 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1334 ret = mkv_write_video_color(pb, par, st);
1337 ret = mkv_write_video_projection(s, pb, st);
1340 end_ebml_master(pb, subinfo);
1343 case AVMEDIA_TYPE_AUDIO:
1344 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1347 // no mkv-specific ID, use ACM mode
1348 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1350 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1351 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1353 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1354 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1355 if (output_sample_rate)
1356 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1358 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1359 end_ebml_master(pb, subinfo);
1362 case AVMEDIA_TYPE_SUBTITLE:
1364 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1365 return AVERROR(ENOSYS);
1368 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1369 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1371 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1374 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1375 return AVERROR(EINVAL);
1378 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1379 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1380 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1385 end_ebml_master(pb, track);
1390 static int mkv_write_tracks(AVFormatContext *s)
1392 MatroskaMuxContext *mkv = s->priv_data;
1393 AVIOContext *pb = s->pb;
1394 int i, ret, default_stream_exists = 0;
1396 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1398 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1402 for (i = 0; i < s->nb_streams; i++) {
1403 AVStream *st = s->streams[i];
1404 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1406 for (i = 0; i < s->nb_streams; i++) {
1407 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1412 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1413 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, &mkv->tracks_pos);
1415 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
1420 static int mkv_write_chapters(AVFormatContext *s)
1422 MatroskaMuxContext *mkv = s->priv_data;
1423 AVIOContext *dyn_cp, *pb = s->pb;
1424 ebml_master editionentry;
1425 AVRational scale = {1, 1E9};
1428 if (!s->nb_chapters || mkv->wrote_chapters)
1431 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1433 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1434 if (ret < 0) return ret;
1436 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1437 if (mkv->mode != MODE_WEBM) {
1438 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1439 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1441 for (i = 0; i < s->nb_chapters; i++) {
1442 ebml_master chapteratom, chapterdisplay;
1443 AVChapter *c = s->chapters[i];
1444 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1445 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1446 AVDictionaryEntry *t = NULL;
1447 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1448 av_log(s, AV_LOG_ERROR,
1449 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1450 chapterstart, chapterend);
1451 return AVERROR_INVALIDDATA;
1454 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1455 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1456 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1457 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1458 if (mkv->mode != MODE_WEBM) {
1459 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1460 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1462 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1463 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1464 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1465 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1466 end_ebml_master(dyn_cp, chapterdisplay);
1468 end_ebml_master(dyn_cp, chapteratom);
1470 end_ebml_master(dyn_cp, editionentry);
1471 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1473 mkv->wrote_chapters = 1;
1477 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1479 uint8_t *key = av_strdup(t->key);
1481 const uint8_t *lang = NULL;
1485 return AVERROR(ENOMEM);
1487 if ((p = strrchr(p, '-')) &&
1488 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1495 else if (*p >= 'a' && *p <= 'z')
1500 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1501 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1503 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1504 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1505 end_ebml_master(pb, tag);
1511 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1512 unsigned int uid, ebml_master *tag)
1515 MatroskaMuxContext *mkv = s->priv_data;
1516 ebml_master targets;
1519 if (!mkv->tags_bc) {
1520 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1522 ret = start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1528 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1529 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1531 put_ebml_uint(pb, elementid, uid);
1532 end_ebml_master(pb, targets);
1536 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1538 return av_strcasecmp(name, "title") &&
1539 av_strcasecmp(name, "stereo_mode") &&
1540 av_strcasecmp(name, "creation_time") &&
1541 av_strcasecmp(name, "encoding_tool") &&
1542 av_strcasecmp(name, "duration") &&
1543 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1544 av_strcasecmp(name, "language")) &&
1545 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1546 (av_strcasecmp(name, "filename") &&
1547 av_strcasecmp(name, "mimetype")));
1550 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1553 MatroskaMuxContext *mkv = s->priv_data;
1556 AVDictionaryEntry *t = NULL;
1558 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1562 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1563 if (mkv_check_tag_name(t->key, elementid)) {
1564 ret = mkv_write_simpletag(mkv->tags_bc, t);
1570 end_ebml_master(mkv->tags_bc, tag);
1574 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1576 AVDictionaryEntry *t = NULL;
1578 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1579 if (mkv_check_tag_name(t->key, elementid))
1585 static int mkv_write_tags(AVFormatContext *s)
1587 MatroskaMuxContext *mkv = s->priv_data;
1590 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1592 if (mkv_check_tag(s->metadata, 0)) {
1593 ret = mkv_write_tag(s, s->metadata, 0, 0);
1594 if (ret < 0) return ret;
1597 for (i = 0; i < s->nb_streams; i++) {
1598 AVStream *st = s->streams[i];
1600 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1603 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1606 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1607 if (ret < 0) return ret;
1610 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1611 for (i = 0; i < s->nb_streams; i++) {
1613 AVStream *st = s->streams[i];
1614 ebml_master tag_target;
1617 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1620 ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
1621 i + 1, &tag_target);
1626 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1627 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1628 mkv->tracks[i].duration_offset = avio_tell(pb);
1630 // Reserve space to write duration as a 20-byte string.
1631 // 2 (ebml id) + 1 (data size) + 20 (data)
1632 put_ebml_void(pb, 23);
1633 end_ebml_master(pb, tag);
1634 end_ebml_master(pb, tag_target);
1638 if (mkv->mode != MODE_WEBM) {
1639 for (i = 0; i < s->nb_chapters; i++) {
1640 AVChapter *ch = s->chapters[i];
1642 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1645 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1651 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1652 for (i = 0; i < mkv->attachments->num_entries; i++) {
1653 mkv_attachment *attachment = &mkv->attachments->entries[i];
1654 AVStream *st = s->streams[attachment->stream_idx];
1656 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1659 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1666 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1667 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, &mkv->tags_pos);
1669 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv);
1674 static int mkv_write_attachments(AVFormatContext *s)
1676 MatroskaMuxContext *mkv = s->priv_data;
1677 AVIOContext *dyn_cp, *pb = s->pb;
1681 if (!mkv->have_attachments)
1684 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1685 if (!mkv->attachments)
1686 return AVERROR(ENOMEM);
1688 av_lfg_init(&c, av_get_random_seed());
1690 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1692 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1693 if (ret < 0) return ret;
1695 for (i = 0; i < s->nb_streams; i++) {
1696 AVStream *st = s->streams[i];
1697 ebml_master attached_file;
1698 mkv_attachment *attachment = mkv->attachments->entries;
1699 AVDictionaryEntry *t;
1700 const char *mimetype = NULL;
1703 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1706 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1708 return AVERROR(ENOMEM);
1709 mkv->attachments->entries = attachment;
1711 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1713 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1714 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1715 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1716 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1717 return AVERROR(EINVAL);
1719 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1720 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1721 mimetype = t->value;
1722 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1724 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1725 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1726 mimetype = ff_mkv_mime_tags[i].str;
1729 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1730 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1731 mimetype = ff_mkv_image_mime_tags[i].str;
1736 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1737 "it cannot be deduced from the codec id.\n", i);
1738 return AVERROR(EINVAL);
1741 if (s->flags & AVFMT_FLAG_BITEXACT) {
1742 struct AVSHA *sha = av_sha_alloc();
1745 return AVERROR(ENOMEM);
1746 av_sha_init(sha, 160);
1747 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1748 av_sha_final(sha, digest);
1750 fileuid = AV_RL32(digest);
1752 fileuid = av_lfg_get(&c);
1754 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1755 fileuid, mkv->attachments->num_entries);
1757 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1758 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1759 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1760 end_ebml_master(dyn_cp, attached_file);
1762 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1763 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1765 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1770 static int64_t get_metadata_duration(AVFormatContext *s)
1776 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1777 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1778 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1782 for (i = 0; i < s->nb_streams; i++) {
1784 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1786 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1787 max = FFMAX(max, us);
1790 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1794 static int mkv_write_header(AVFormatContext *s)
1796 MatroskaMuxContext *mkv = s->priv_data;
1797 AVIOContext *pb = s->pb;
1798 ebml_master ebml_header;
1799 AVDictionaryEntry *tag;
1800 int ret, i, version = 2;
1801 int64_t creation_time;
1803 if (!strcmp(s->oformat->name, "webm")) {
1804 mkv->mode = MODE_WEBM;
1807 mkv->mode = MODE_MATROSKAv2;
1809 if (mkv->mode != MODE_WEBM ||
1810 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1811 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1814 for (i = 0; i < s->nb_streams; i++) {
1815 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1816 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1817 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1821 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1823 return AVERROR(ENOMEM);
1825 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1826 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1827 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1828 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1829 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1830 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1831 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1832 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1833 end_ebml_master(pb, ebml_header);
1835 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1836 mkv->segment_offset = avio_tell(pb);
1838 // we write a seek head at the beginning to point to all other level
1839 // one elements (except Clusters).
1840 mkv_start_seekhead(mkv, pb);
1842 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1844 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1849 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1850 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1851 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1852 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1853 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1854 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1855 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1857 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1859 if (mkv->mode != MODE_WEBM) {
1860 uint32_t segment_uid[4];
1863 av_lfg_init(&lfg, av_get_random_seed());
1865 for (i = 0; i < 4; i++)
1866 segment_uid[i] = av_lfg_get(&lfg);
1868 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1871 const char *ident = "Lavf";
1872 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1873 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1876 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1877 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1878 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1879 uint8_t date_utc_buf[8];
1880 AV_WB64(date_utc_buf, date_utc);
1881 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1884 // reserve space for the duration
1886 mkv->duration_offset = avio_tell(pb);
1887 if (!mkv->is_live) {
1888 int64_t metadata_duration = get_metadata_duration(s);
1890 if (s->duration > 0) {
1891 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1892 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1893 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1894 } else if (metadata_duration > 0) {
1895 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1896 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1897 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1899 put_ebml_void(pb, 11); // assumes double-precision float to be written
1902 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1903 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, &mkv->info_pos);
1905 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv);
1908 ret = mkv_write_tracks(s);
1912 for (i = 0; i < s->nb_chapters; i++)
1913 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1915 ret = mkv_write_chapters(s);
1919 if (mkv->mode != MODE_WEBM) {
1920 ret = mkv_write_attachments(s);
1925 ret = mkv_write_tags(s);
1929 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1930 ret = mkv_write_seekhead(pb, mkv, 0);
1935 mkv->cues = mkv_start_cues(mkv->segment_offset);
1937 return AVERROR(ENOMEM);
1940 if (s->metadata_header_padding > 0) {
1941 if (s->metadata_header_padding == 1)
1942 s->metadata_header_padding++;
1943 put_ebml_void(pb, s->metadata_header_padding);
1946 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1947 mkv->cues_pos = avio_tell(pb);
1948 if (mkv->reserve_cues_space == 1)
1949 mkv->reserve_cues_space++;
1950 put_ebml_void(pb, mkv->reserve_cues_space);
1953 av_init_packet(&mkv->cur_audio_pkt);
1954 mkv->cur_audio_pkt.size = 0;
1955 mkv->cluster_pos = -1;
1957 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1958 // after 4k and on a keyframe
1959 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1960 if (mkv->cluster_time_limit < 0)
1961 mkv->cluster_time_limit = 5000;
1962 if (mkv->cluster_size_limit < 0)
1963 mkv->cluster_size_limit = 5 * 1024 * 1024;
1965 if (mkv->cluster_time_limit < 0)
1966 mkv->cluster_time_limit = 1000;
1967 if (mkv->cluster_size_limit < 0)
1968 mkv->cluster_size_limit = 32 * 1024;
1974 static int mkv_blockgroup_size(int pkt_size)
1976 int size = pkt_size + 4;
1977 size += ebml_num_size(size);
1978 size += 2; // EBML ID for block and block duration
1979 size += 9; // max size of block duration incl. length field
1983 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1990 dst = av_malloc(srclen);
1992 return AVERROR(ENOMEM);
1994 while (srclen >= WV_HEADER_SIZE) {
1997 ret = ff_wv_parse_header(&header, src);
2000 src += WV_HEADER_SIZE;
2001 srclen -= WV_HEADER_SIZE;
2003 if (srclen < header.blocksize) {
2004 ret = AVERROR_INVALIDDATA;
2008 if (header.initial) {
2009 AV_WL32(dst + offset, header.samples);
2012 AV_WL32(dst + offset, header.flags);
2013 AV_WL32(dst + offset + 4, header.crc);
2016 if (!(header.initial && header.final)) {
2017 AV_WL32(dst + offset, header.blocksize);
2021 memcpy(dst + offset, src, header.blocksize);
2022 src += header.blocksize;
2023 srclen -= header.blocksize;
2024 offset += header.blocksize;
2036 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2037 uint32_t blockid, AVPacket *pkt, int keyframe)
2039 MatroskaMuxContext *mkv = s->priv_data;
2040 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2041 mkv_track *track = &mkv->tracks[pkt->stream_index];
2042 uint8_t *data = NULL, *side_data = NULL;
2043 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2044 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2045 uint64_t additional_id = 0;
2046 int64_t discard_padding = 0;
2047 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2048 ebml_master block_group, block_additions, block_more;
2050 ts += track->ts_offset;
2052 /* The following string is identical to the one in mkv_write_vtt_blocks
2053 * so that only one copy needs to exist in binaries. */
2054 av_log(s, AV_LOG_DEBUG,
2055 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2056 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2057 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2058 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2059 mkv->cluster_pos, track_number, keyframe != 0);
2061 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2062 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2063 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2064 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2065 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2066 /* extradata is Annex B, assume the bitstream is too and convert it */
2067 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2068 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2069 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2070 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2071 err = mkv_strip_wavpack(pkt->data, &data, &size);
2076 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2077 "a packet from stream %d.\n", pkt->stream_index);
2081 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2082 /* Matroska specification requires to remove the first QuickTime atom
2088 side_data = av_packet_get_side_data(pkt,
2089 AV_PKT_DATA_SKIP_SAMPLES,
2091 if (side_data && side_data_size >= 10) {
2092 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2093 (AVRational){1, par->sample_rate},
2094 (AVRational){1, 1000000000});
2097 side_data = av_packet_get_side_data(pkt,
2098 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2101 if (side_data_size < 8) {
2104 additional_id = AV_RB64(side_data);
2106 side_data_size -= 8;
2110 if ((side_data_size && additional_id == 1) || discard_padding) {
2111 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2112 blockid = MATROSKA_ID_BLOCK;
2115 put_ebml_id(pb, blockid);
2116 put_ebml_num(pb, size + 4, 0);
2117 // this assumes stream_index is less than 126
2118 avio_w8(pb, 0x80 | track_number);
2119 avio_wb16(pb, ts - mkv->cluster_pts);
2120 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2121 avio_write(pb, data + offset, size);
2122 if (data != pkt->data)
2125 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2126 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2128 track->last_timestamp = ts;
2130 if (discard_padding) {
2131 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2134 if (side_data_size && additional_id == 1) {
2135 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2136 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2137 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2138 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2139 put_ebml_num(pb, side_data_size, 0);
2140 avio_write(pb, side_data, side_data_size);
2141 end_ebml_master(pb, block_more);
2142 end_ebml_master(pb, block_additions);
2144 if ((side_data_size && additional_id == 1) || discard_padding) {
2145 end_ebml_master(pb, block_group);
2151 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2153 MatroskaMuxContext *mkv = s->priv_data;
2154 ebml_master blockgroup;
2155 int id_size, settings_size, size;
2156 uint8_t *id, *settings;
2157 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2158 const int flags = 0;
2161 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2165 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2168 size = id_size + 1 + settings_size + 1 + pkt->size;
2170 /* The following string is identical to the one in mkv_write_block so that
2171 * only one copy needs to exist in binaries. */
2172 av_log(s, AV_LOG_DEBUG,
2173 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2174 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2175 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2176 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2177 mkv->cluster_pos, pkt->stream_index + 1, 1);
2179 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2181 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2182 put_ebml_num(pb, size + 4, 0);
2183 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2184 avio_wb16(pb, ts - mkv->cluster_pts);
2186 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2188 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2189 end_ebml_master(pb, blockgroup);
2191 return pkt->duration;
2194 static void mkv_end_cluster(AVFormatContext *s)
2196 MatroskaMuxContext *mkv = s->priv_data;
2198 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2199 mkv->cluster_pos = -1;
2200 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2203 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2205 MatroskaMuxContext *mkv = s->priv_data;
2206 mkv_track *track = &mkv->tracks[pkt->stream_index];
2207 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2209 int side_data_size = 0, ret;
2211 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2214 switch (par->codec_id) {
2215 case AV_CODEC_ID_AAC:
2216 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2217 int filler, output_sample_rate = 0;
2219 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2220 &output_sample_rate);
2223 if (!output_sample_rate)
2224 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2225 ret = ff_alloc_extradata(par, side_data_size);
2228 memcpy(par->extradata, side_data, side_data_size);
2229 curpos = avio_tell(mkv->tracks_bc);
2230 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2231 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2232 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2234 put_ebml_void(mkv->tracks_bc, filler);
2235 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2236 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2237 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2238 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2239 } else if (!par->extradata_size && !track->sample_rate) {
2240 // No extradata (codecpar or packet side data).
2241 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2242 return AVERROR(EINVAL);
2245 case AV_CODEC_ID_FLAC:
2246 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2247 AVCodecParameters *codecpriv_par;
2249 if (side_data_size != par->extradata_size) {
2250 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2252 return AVERROR(EINVAL);
2254 codecpriv_par = avcodec_parameters_alloc();
2256 return AVERROR(ENOMEM);
2257 ret = avcodec_parameters_copy(codecpriv_par, par);
2259 avcodec_parameters_free(&codecpriv_par);
2262 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2263 curpos = avio_tell(mkv->tracks_bc);
2264 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2265 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2266 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2267 avcodec_parameters_free(&codecpriv_par);
2270 // FIXME: Remove the following once libaom starts propagating extradata during init()
2271 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2272 case AV_CODEC_ID_AV1:
2273 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2274 !par->extradata_size) {
2275 AVIOContext *dyn_cp;
2279 ret = avio_open_dyn_buf(&dyn_cp);
2282 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2283 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2284 if (!codecpriv_size) {
2286 return AVERROR_INVALIDDATA;
2288 curpos = avio_tell(mkv->tracks_bc);
2289 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2290 // Do not write the OBUs as we don't have space saved for them
2291 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2293 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2294 ret = ff_alloc_extradata(par, side_data_size);
2297 memcpy(par->extradata, side_data, side_data_size);
2298 } else if (!par->extradata_size)
2299 return AVERROR_INVALIDDATA;
2303 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2310 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2312 MatroskaMuxContext *mkv = s->priv_data;
2314 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2315 mkv_track *track = &mkv->tracks[pkt->stream_index];
2316 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2317 int duration = pkt->duration;
2319 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2320 int64_t relative_packet_pos;
2321 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2323 if (ts == AV_NOPTS_VALUE) {
2324 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2325 return AVERROR(EINVAL);
2327 ts += track->ts_offset;
2329 if (mkv->cluster_pos != -1) {
2330 int64_t cluster_time = ts - mkv->cluster_pts;
2331 if ((int16_t)cluster_time != cluster_time) {
2333 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2337 if (mkv->cluster_pos == -1) {
2338 mkv->cluster_pos = avio_tell(s->pb);
2339 ret = start_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2342 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2343 mkv->cluster_pts = FFMAX(0, ts);
2344 av_log(s, AV_LOG_DEBUG,
2345 "Starting new cluster with timestamp "
2346 "%" PRId64 " at offset %" PRId64 " bytes\n",
2347 mkv->cluster_pts, mkv->cluster_pos);
2349 pb = mkv->cluster_bc;
2351 relative_packet_pos = avio_tell(pb);
2353 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2354 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2357 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2358 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2359 if (ret < 0) return ret;
2362 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2363 duration = mkv_write_vtt_blocks(s, pb, pkt);
2365 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2366 mkv_blockgroup_size(pkt->size));
2368 #if FF_API_CONVERGENCE_DURATION
2369 FF_DISABLE_DEPRECATION_WARNINGS
2370 /* For backward compatibility, prefer convergence_duration. */
2371 if (pkt->convergence_duration > 0) {
2372 duration = pkt->convergence_duration;
2374 FF_ENABLE_DEPRECATION_WARNINGS
2376 /* All subtitle blocks are considered to be keyframes. */
2377 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2378 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2379 end_ebml_master(pb, blockgroup);
2382 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2383 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts,
2384 mkv->cluster_pos, relative_packet_pos, duration);
2390 mkv->duration = FFMAX(mkv->duration, ts + duration);
2391 track->duration = FFMAX(track->duration, ts + duration);
2396 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2398 MatroskaMuxContext *mkv = s->priv_data;
2399 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2400 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2402 int64_t cluster_time;
2404 int start_new_cluster;
2406 ret = mkv_check_new_extra_data(s, pkt);
2410 if (mkv->tracks[pkt->stream_index].write_dts)
2411 cluster_time = pkt->dts - mkv->cluster_pts;
2413 cluster_time = pkt->pts - mkv->cluster_pts;
2414 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2416 cluster_size = avio_tell(mkv->cluster_bc);
2418 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2419 // WebM DASH specification states that the first block of every cluster
2420 // has to be a key frame. So for DASH video, we only create a cluster
2421 // on seeing key frames.
2422 start_new_cluster = keyframe;
2423 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2424 (mkv->cluster_pos == -1 ||
2425 cluster_time > mkv->cluster_time_limit)) {
2426 // For DASH audio, we create a Cluster based on cluster_time_limit
2427 start_new_cluster = 1;
2428 } else if (!mkv->is_dash &&
2429 (cluster_size > mkv->cluster_size_limit ||
2430 cluster_time > mkv->cluster_time_limit ||
2431 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2432 cluster_size > 4 * 1024))) {
2433 start_new_cluster = 1;
2435 start_new_cluster = 0;
2438 if (mkv->cluster_pos != -1 && start_new_cluster) {
2442 if (!mkv->cluster_pos)
2443 avio_write_marker(s->pb,
2444 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2445 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2447 // check if we have an audio packet cached
2448 if (mkv->cur_audio_pkt.size > 0) {
2449 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2450 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2451 mkv->is_dash ? start_new_cluster : 0);
2452 av_packet_unref(&mkv->cur_audio_pkt);
2454 av_log(s, AV_LOG_ERROR,
2455 "Could not write cached audio packet ret:%d\n", ret);
2460 // buffer an audio packet to ensure the packet containing the video
2461 // keyframe's timecode is contained in the same cluster for WebM
2462 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2464 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2466 ret = mkv_write_packet_internal(s, pkt, 0);
2470 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2472 MatroskaMuxContext *mkv = s->priv_data;
2475 if (mkv->cluster_pos != -1) {
2477 av_log(s, AV_LOG_DEBUG,
2478 "Flushing cluster at offset %" PRIu64 " bytes\n",
2483 return mkv_write_packet(s, pkt);
2486 static int mkv_write_trailer(AVFormatContext *s)
2488 MatroskaMuxContext *mkv = s->priv_data;
2489 AVIOContext *pb = s->pb;
2490 int64_t currentpos, cuespos;
2493 // check if we have an audio packet cached
2494 if (mkv->cur_audio_pkt.size > 0) {
2495 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2497 av_log(s, AV_LOG_ERROR,
2498 "Could not write cached audio packet ret:%d\n", ret);
2503 if (mkv->cluster_bc) {
2504 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv);
2507 ret = mkv_write_chapters(s);
2512 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2513 if (mkv->cues->num_entries) {
2514 if (mkv->reserve_cues_space) {
2517 currentpos = avio_tell(pb);
2518 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2520 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2521 cues_end = avio_tell(pb);
2522 if (cues_end > cuespos + mkv->reserve_cues_space) {
2523 av_log(s, AV_LOG_ERROR,
2524 "Insufficient space reserved for cues: %d "
2525 "(needed: %" PRId64 ").\n",
2526 mkv->reserve_cues_space, cues_end - cuespos);
2527 return AVERROR(EINVAL);
2530 if (cues_end < cuespos + mkv->reserve_cues_space)
2531 put_ebml_void(pb, mkv->reserve_cues_space -
2532 (cues_end - cuespos));
2534 avio_seek(pb, currentpos, SEEK_SET);
2536 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2539 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2542 ret = mkv_write_seekhead(pb, mkv, 1);
2546 // update the duration
2547 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2548 currentpos = avio_tell(pb);
2549 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2550 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2551 avio_seek(pb, mkv->info_pos, SEEK_SET);
2552 end_ebml_master_crc32(pb, &mkv->info_bc, mkv);
2554 // write tracks master
2555 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2556 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
2558 // update stream durations
2559 if (!mkv->is_live) {
2561 int64_t curr = avio_tell(mkv->tags_bc);
2562 for (i = 0; i < s->nb_streams; ++i) {
2563 AVStream *st = s->streams[i];
2564 mkv_track *track = &mkv->tracks[i];
2566 if (track->duration_offset > 0) {
2567 double duration_sec = track->duration * av_q2d(st->time_base);
2568 char duration_string[20] = "";
2570 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2573 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2575 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2576 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2577 fmod(duration_sec, 60));
2579 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2582 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2584 if (mkv->tags_bc && !mkv->is_live) {
2585 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2586 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv);
2589 avio_seek(pb, currentpos, SEEK_SET);
2592 if (!mkv->is_live) {
2593 end_ebml_master(pb, mkv->segment);
2599 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2602 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2603 if (ff_mkv_codec_tags[i].id == codec_id)
2606 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2607 enum AVMediaType type = avcodec_get_type(codec_id);
2608 // mkv theoretically supports any video/audio through VFW/ACM
2609 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2616 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2619 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2620 if (ff_webm_codec_tags[i].id == codec_id)
2626 static int mkv_init(struct AVFormatContext *s)
2630 if (s->nb_streams > MAX_TRACKS) {
2631 av_log(s, AV_LOG_ERROR,
2632 "At most %d streams are supported for muxing in Matroska\n",
2634 return AVERROR(EINVAL);
2637 for (i = 0; i < s->nb_streams; i++) {
2638 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2639 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2640 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2641 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2642 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2643 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2644 av_log(s, AV_LOG_ERROR,
2645 "The Matroska muxer does not yet support muxing %s\n",
2646 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2647 return AVERROR_PATCHWELCOME;
2651 if (s->avoid_negative_ts < 0) {
2652 s->avoid_negative_ts = 1;
2653 s->internal->avoid_negative_ts_use_pts = 1;
2656 for (i = 0; i < s->nb_streams; i++) {
2657 // ms precision is the de-facto standard timescale for mkv files
2658 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2664 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2667 AVStream *st = s->streams[pkt->stream_index];
2669 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2670 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2671 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2672 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2673 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2679 static const AVCodecTag additional_audio_tags[] = {
2680 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2681 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2682 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2683 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2684 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2685 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2686 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2687 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2688 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2689 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2690 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2691 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2692 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2695 static const AVCodecTag additional_video_tags[] = {
2696 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2697 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2698 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2699 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2702 static const AVCodecTag additional_subtitle_tags[] = {
2703 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2704 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2705 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2706 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2709 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2710 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2711 static const AVOption options[] = {
2712 { "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 },
2713 { "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 },
2714 { "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 },
2715 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2716 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2717 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2718 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2719 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2723 #if CONFIG_MATROSKA_MUXER
2724 static const AVClass matroska_class = {
2725 .class_name = "matroska muxer",
2726 .item_name = av_default_item_name,
2728 .version = LIBAVUTIL_VERSION_INT,
2731 AVOutputFormat ff_matroska_muxer = {
2733 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2734 .mime_type = "video/x-matroska",
2735 .extensions = "mkv",
2736 .priv_data_size = sizeof(MatroskaMuxContext),
2737 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2738 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2739 .video_codec = CONFIG_LIBX264_ENCODER ?
2740 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2742 .deinit = mkv_deinit,
2743 .write_header = mkv_write_header,
2744 .write_packet = mkv_write_flush_packet,
2745 .write_trailer = mkv_write_trailer,
2746 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2747 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2748 .codec_tag = (const AVCodecTag* const []){
2749 ff_codec_bmp_tags, ff_codec_wav_tags,
2750 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2752 .subtitle_codec = AV_CODEC_ID_ASS,
2753 .query_codec = mkv_query_codec,
2754 .check_bitstream = mkv_check_bitstream,
2755 .priv_class = &matroska_class,
2759 #if CONFIG_WEBM_MUXER
2760 static const AVClass webm_class = {
2761 .class_name = "webm muxer",
2762 .item_name = av_default_item_name,
2764 .version = LIBAVUTIL_VERSION_INT,
2767 AVOutputFormat ff_webm_muxer = {
2769 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2770 .mime_type = "video/webm",
2771 .extensions = "webm",
2772 .priv_data_size = sizeof(MatroskaMuxContext),
2773 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2774 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2775 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2777 .deinit = mkv_deinit,
2778 .write_header = mkv_write_header,
2779 .write_packet = mkv_write_flush_packet,
2780 .write_trailer = mkv_write_trailer,
2781 .query_codec = webm_query_codec,
2782 .check_bitstream = mkv_check_bitstream,
2783 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2784 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2785 .priv_class = &webm_class,
2789 #if CONFIG_MATROSKA_AUDIO_MUXER
2790 static const AVClass mka_class = {
2791 .class_name = "matroska audio muxer",
2792 .item_name = av_default_item_name,
2794 .version = LIBAVUTIL_VERSION_INT,
2796 AVOutputFormat ff_matroska_audio_muxer = {
2798 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2799 .mime_type = "audio/x-matroska",
2800 .extensions = "mka",
2801 .priv_data_size = sizeof(MatroskaMuxContext),
2802 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2803 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2804 .video_codec = AV_CODEC_ID_NONE,
2806 .deinit = mkv_deinit,
2807 .write_header = mkv_write_header,
2808 .write_packet = mkv_write_flush_packet,
2809 .write_trailer = mkv_write_trailer,
2810 .check_bitstream = mkv_check_bitstream,
2811 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2813 .codec_tag = (const AVCodecTag* const []){
2814 ff_codec_wav_tags, additional_audio_tags, 0
2816 .priv_class = &mka_class,