3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "avio_internal.h"
29 #include "avlanguage.h"
35 #include "subtitles.h"
36 #include "vorbiscomment.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/channel_layout.h"
41 #include "libavutil/crc.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/intfloat.h"
44 #include "libavutil/intreadwrite.h"
45 #include "libavutil/lfg.h"
46 #include "libavutil/mastering_display_metadata.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/opt.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/random_seed.h"
51 #include "libavutil/rational.h"
52 #include "libavutil/samplefmt.h"
53 #include "libavutil/sha.h"
54 #include "libavutil/stereo3d.h"
56 #include "libavcodec/xiph.h"
57 #include "libavcodec/mpeg4audio.h"
58 #include "libavcodec/internal.h"
60 typedef struct ebml_master {
61 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
62 int sizebytes; ///< how many bytes were reserved for the size
65 typedef struct mkv_seekhead_entry {
70 typedef struct mkv_seekhead {
72 int64_t segment_offset; ///< the file offset to the beginning of the segment
73 int reserved_size; ///< -1 if appending to file
75 mkv_seekhead_entry *entries;
79 typedef struct mkv_cuepoint {
83 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
84 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
85 int64_t duration; ///< duration of the block according to time base
88 typedef struct mkv_cues {
89 int64_t segment_offset;
90 mkv_cuepoint *entries;
94 typedef struct mkv_track {
98 int64_t sample_rate_offset;
99 int64_t last_timestamp;
101 int64_t duration_offset;
102 int64_t codecpriv_offset;
106 typedef struct mkv_attachment {
111 typedef struct mkv_attachments {
112 mkv_attachment *entries;
116 #define MODE_MATROSKAv2 0x01
117 #define MODE_WEBM 0x02
119 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
120 * range 1 to 126 (inclusive) */
121 #define MAX_TRACKS 126
123 typedef struct MatroskaMuxContext {
124 const AVClass *class;
126 AVIOContext *tags_bc;
128 AVIOContext *info_bc;
130 AVIOContext *tracks_bc;
133 int64_t segment_offset;
134 AVIOContext *cluster_bc;
135 int64_t cluster_pos; ///< file offset of the current cluster
137 int64_t duration_offset;
139 mkv_seekhead *seekhead;
142 mkv_attachments *attachments;
144 AVPacket cur_audio_pkt;
146 int have_attachments;
149 int reserve_cues_space;
150 int cluster_size_limit;
152 int64_t cluster_time_limit;
154 int dash_track_number;
158 uint32_t chapter_id_offset;
162 } MatroskaMuxContext;
164 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
165 * 8 byte for "matroska" doctype string */
166 #define MAX_EBML_HEADER_SIZE 35
168 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
169 * offset, 4 bytes for target EBML ID */
170 #define MAX_SEEKENTRY_SIZE 21
172 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 3 8-byte uint max
173 * and one 1-byte uint for the track number (this assumes MAX_TRACKS to be <= 255) */
174 #define MAX_CUETRACKPOS_SIZE 35
176 /** per-cuepoint - 1 1-byte EBML ID, 1 1-byte EBML size, 8-byte uint max */
177 #define MAX_CUEPOINT_CONTENT_SIZE(num_tracks) 10 + MAX_CUETRACKPOS_SIZE * num_tracks
179 /** Seek preroll value for opus */
180 #define OPUS_SEEK_PREROLL 80000000
182 static int ebml_id_size(uint32_t id)
184 return (av_log2(id + 1) - 1) / 7 + 1;
187 static void put_ebml_id(AVIOContext *pb, uint32_t id)
189 int i = ebml_id_size(id);
191 avio_w8(pb, (uint8_t)(id >> (i * 8)));
195 * Write an EBML size meaning "unknown size".
197 * @param bytes The number of bytes the size should occupy (maximum: 8).
199 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
201 av_assert0(bytes <= 8);
202 avio_w8(pb, 0x1ff >> bytes);
203 ffio_fill(pb, 0xff, bytes - 1);
207 * Calculate how many bytes are needed to represent a given number in EBML.
209 static int ebml_num_size(uint64_t num)
212 while ((num + 1) >> bytes * 7)
218 * Write a number in EBML variable length format.
220 * @param bytes The number of bytes that need to be used to write the number.
221 * If zero, the minimal number of bytes will be used.
223 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
225 int i, needed_bytes = ebml_num_size(num);
227 // sizes larger than this are currently undefined in EBML
228 av_assert0(num < (1ULL << 56) - 1);
231 bytes = needed_bytes;
232 // The bytes needed to write the given size must not exceed
233 // the bytes that we ought to use.
234 av_assert0(bytes >= needed_bytes);
236 num |= 1ULL << bytes * 7;
237 for (i = bytes - 1; i >= 0; i--)
238 avio_w8(pb, (uint8_t)(num >> i * 8));
241 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
248 put_ebml_id(pb, elementid);
249 put_ebml_num(pb, bytes, 0);
250 for (i = bytes - 1; i >= 0; i--)
251 avio_w8(pb, (uint8_t)(val >> i * 8));
254 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
257 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
259 while (tmp>>=8) bytes++;
261 put_ebml_id(pb, elementid);
262 put_ebml_num(pb, bytes, 0);
263 for (i = bytes - 1; i >= 0; i--)
264 avio_w8(pb, (uint8_t)(val >> i * 8));
267 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
269 put_ebml_id(pb, elementid);
270 put_ebml_num(pb, 8, 0);
271 avio_wb64(pb, av_double2int(val));
274 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
275 const void *buf, int size)
277 put_ebml_id(pb, elementid);
278 put_ebml_num(pb, size, 0);
279 avio_write(pb, buf, size);
282 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
285 put_ebml_binary(pb, elementid, str, strlen(str));
289 * Write a void element of a given size. Useful for reserving space in
290 * the file to be written to later.
292 * @param size The number of bytes to reserve, which must be at least 2.
294 static void put_ebml_void(AVIOContext *pb, uint64_t size)
296 int64_t currentpos = avio_tell(pb);
298 av_assert0(size >= 2);
300 put_ebml_id(pb, EBML_ID_VOID);
301 // we need to subtract the length needed to store the size from the
302 // size we need to reserve so 2 cases, we use 8 bytes to store the
303 // size if possible, 1 byte otherwise
305 put_ebml_num(pb, size - 2, 0);
307 put_ebml_num(pb, size - 9, 8);
308 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
311 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
312 uint64_t expectedsize)
314 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
316 put_ebml_id(pb, elementid);
317 put_ebml_size_unknown(pb, bytes);
318 return (ebml_master) { avio_tell(pb), bytes };
321 static void end_ebml_master(AVIOContext *pb, ebml_master master)
323 int64_t pos = avio_tell(pb);
325 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
327 put_ebml_num(pb, pos - master.pos, master.sizebytes);
328 avio_seek(pb, pos, SEEK_SET);
331 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
336 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
339 put_ebml_id(pb, elementid);
341 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
346 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
348 uint8_t *buf, crc[4];
351 size = avio_close_dyn_buf(*dyn_cp, &buf);
352 put_ebml_num(pb, size, 0);
353 if (mkv->write_crc) {
354 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
355 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
356 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
358 avio_write(pb, buf + skip, size - skip);
365 * Complete ebml master without destroying the buffer, allowing for later updates
367 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
371 int size = avio_get_dyn_buf(*dyn_cp, &buf);
373 *pos = avio_tell(pb);
375 put_ebml_num(pb, size, 0);
376 avio_write(pb, buf, size);
379 static void put_xiph_size(AVIOContext *pb, int size)
381 ffio_fill(pb, 255, size / 255);
382 avio_w8(pb, size % 255);
386 * Free the members allocated in the mux context.
388 static void mkv_deinit(AVFormatContext *s)
390 MatroskaMuxContext *mkv = s->priv_data;
392 av_packet_unref(&mkv->cur_audio_pkt);
394 ffio_free_dyn_buf(&mkv->cluster_bc);
395 ffio_free_dyn_buf(&mkv->info_bc);
396 ffio_free_dyn_buf(&mkv->tracks_bc);
397 ffio_free_dyn_buf(&mkv->tags_bc);
400 av_freep(&mkv->seekhead->entries);
401 av_freep(&mkv->seekhead);
404 av_freep(&mkv->cues->entries);
405 av_freep(&mkv->cues);
407 if (mkv->attachments) {
408 av_freep(&mkv->attachments->entries);
409 av_freep(&mkv->attachments);
411 av_freep(&mkv->tracks);
415 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
416 * elements. If a maximum number of elements is specified, enough space
417 * will be reserved at the current file location to write a seek head of
420 * @param segment_offset The absolute offset to the position in the file
421 * where the segment begins.
422 * @param numelements The maximum number of elements that will be indexed
423 * by this seek head, 0 if unlimited.
425 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
428 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
432 new_seekhead->segment_offset = segment_offset;
434 if (numelements > 0) {
435 new_seekhead->filepos = avio_tell(pb);
436 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
437 // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee
438 // that an EBML void element will fit afterwards
439 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19;
440 new_seekhead->max_entries = numelements;
441 put_ebml_void(pb, new_seekhead->reserved_size);
446 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, uint32_t elementid, uint64_t filepos)
448 mkv_seekhead_entry *entries = seekhead->entries;
450 // don't store more elements than we reserved space for
451 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
454 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
456 return AVERROR(ENOMEM);
457 seekhead->entries = entries;
459 seekhead->entries[seekhead->num_entries].elementid = elementid;
460 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
466 * Write the seek head to the file and free it. If a maximum number of
467 * elements was specified to mkv_start_seekhead(), the seek head will
468 * be written at the location reserved for it. Otherwise, it is written
469 * at the current location in the file.
471 * @return The file offset where the seekhead was written,
472 * -1 if an error occurred.
474 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
477 mkv_seekhead *seekhead = mkv->seekhead;
478 ebml_master seekentry;
482 currentpos = avio_tell(pb);
484 if (seekhead->reserved_size > 0) {
485 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
491 if (start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD) < 0) {
496 for (i = 0; i < seekhead->num_entries; i++) {
497 mkv_seekhead_entry *entry = &seekhead->entries[i];
499 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
501 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
502 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
503 put_ebml_id(dyn_cp, entry->elementid);
505 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
506 end_ebml_master(dyn_cp, seekentry);
508 end_ebml_master_crc32(pb, &dyn_cp, mkv);
510 if (seekhead->reserved_size > 0) {
511 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
512 put_ebml_void(pb, remaining);
513 avio_seek(pb, currentpos, SEEK_SET);
515 currentpos = seekhead->filepos;
518 av_freep(&mkv->seekhead->entries);
519 av_freep(&mkv->seekhead);
524 static mkv_cues *mkv_start_cues(int64_t segment_offset)
526 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
530 cues->segment_offset = segment_offset;
534 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
535 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
537 mkv_cuepoint *entries = cues->entries;
542 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
544 return AVERROR(ENOMEM);
545 cues->entries = entries;
547 cues->entries[cues->num_entries].pts = ts;
548 cues->entries[cues->num_entries].stream_idx = stream;
549 cues->entries[cues->num_entries].tracknum = tracknum;
550 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
551 cues->entries[cues->num_entries].relative_pos = relative_pos;
552 cues->entries[cues->num_entries++].duration = duration;
557 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
559 MatroskaMuxContext *mkv = s->priv_data;
560 AVIOContext *dyn_cp, *pb = s->pb;
564 currentpos = avio_tell(pb);
565 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
569 for (i = 0; i < cues->num_entries; i++) {
570 ebml_master cuepoint, track_positions;
571 mkv_cuepoint *entry = &cues->entries[i];
572 uint64_t pts = entry->pts;
575 // Calculate the number of entries, so we know the element size
576 for (j = 0; j < num_tracks; j++)
577 tracks[j].has_cue = 0;
578 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
579 int idx = entry[j].stream_idx;
581 av_assert0(idx >= 0 && idx < num_tracks);
582 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
584 tracks[idx].has_cue = 1;
588 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_CONTENT_SIZE(ctp_nb));
589 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
591 // put all the entries from different tracks that have the exact same
592 // timestamp into the same CuePoint
593 for (j = 0; j < num_tracks; j++)
594 tracks[j].has_cue = 0;
595 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
596 int idx = entry[j].stream_idx;
598 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
600 tracks[idx].has_cue = 1;
601 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
602 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
603 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
604 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
605 if (entry[j].duration != -1)
606 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
607 end_ebml_master(dyn_cp, track_positions);
610 end_ebml_master(dyn_cp, cuepoint);
612 end_ebml_master_crc32(pb, &dyn_cp, mkv);
617 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
619 const uint8_t *header_start[3];
621 int first_header_size;
624 if (par->codec_id == AV_CODEC_ID_VORBIS)
625 first_header_size = 30;
627 first_header_size = 42;
629 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
630 first_header_size, header_start, header_len) < 0) {
631 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
635 avio_w8(pb, 2); // number packets - 1
636 for (j = 0; j < 2; j++) {
637 put_xiph_size(pb, header_len[j]);
639 for (j = 0; j < 3; j++)
640 avio_write(pb, header_start[j], header_len[j]);
645 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
647 if (par->extradata && par->extradata_size == 2)
648 avio_write(pb, par->extradata, 2);
650 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
654 static int put_flac_codecpriv(AVFormatContext *s,
655 AVIOContext *pb, AVCodecParameters *par)
657 int write_comment = (par->channel_layout &&
658 !(par->channel_layout & ~0x3ffffULL) &&
659 !ff_flac_is_native_layout(par->channel_layout));
660 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
667 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
668 "Lavf" : LIBAVFORMAT_IDENT;
669 AVDictionary *dict = NULL;
670 uint8_t buf[32], *data, *p;
673 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
674 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
676 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
677 if (len >= ((1<<24) - 4)) {
679 return AVERROR(EINVAL);
682 data = av_malloc(len + 4);
685 return AVERROR(ENOMEM);
689 AV_WB24(data + 1, len);
692 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
694 avio_write(pb, data, len + 4);
703 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
704 int *sample_rate, int *output_sample_rate)
706 MPEG4AudioConfig mp4ac;
709 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
710 /* Don't abort if the failure is because of missing extradata. Assume in that
711 * case a bitstream filter will provide the muxer with the extradata in the
713 * Abort however if s->pb is not seekable, as we would not be able to seek back
714 * to write the sample rate elements once the extradata shows up, anyway. */
715 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
716 av_log(s, AV_LOG_ERROR,
717 "Error parsing AAC extradata, unable to determine samplerate.\n");
718 return AVERROR(EINVAL);
722 /* This will only happen when this function is called while writing the
723 * header and no extradata is available. The space for this element has
724 * to be reserved for when this function is called again after the
725 * extradata shows up in the first packet, as there's no way to know if
726 * output_sample_rate will be different than sample_rate or not. */
727 *output_sample_rate = *sample_rate;
729 *sample_rate = mp4ac.sample_rate;
730 *output_sample_rate = mp4ac.ext_sample_rate;
735 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
736 AVCodecParameters *par,
739 switch (par->codec_id) {
740 case AV_CODEC_ID_VORBIS:
741 case AV_CODEC_ID_THEORA:
742 return put_xiph_codecpriv(s, dyn_cp, par);
743 case AV_CODEC_ID_FLAC:
744 return put_flac_codecpriv(s, dyn_cp, par);
745 case AV_CODEC_ID_WAVPACK:
746 return put_wv_codecpriv(dyn_cp, par);
747 case AV_CODEC_ID_H264:
748 return ff_isom_write_avcc(dyn_cp, par->extradata,
749 par->extradata_size);
750 case AV_CODEC_ID_HEVC:
751 return ff_isom_write_hvcc(dyn_cp, par->extradata,
752 par->extradata_size, 0);
753 case AV_CODEC_ID_AV1:
754 if (par->extradata_size)
755 return ff_isom_write_av1c(dyn_cp, par->extradata,
756 par->extradata_size);
758 put_ebml_void(pb, 4 + 3);
760 case AV_CODEC_ID_ALAC:
761 if (par->extradata_size < 36) {
762 av_log(s, AV_LOG_ERROR,
763 "Invalid extradata found, ALAC expects a 36-byte "
765 return AVERROR_INVALIDDATA;
767 avio_write(dyn_cp, par->extradata + 12,
768 par->extradata_size - 12);
770 case AV_CODEC_ID_AAC:
771 if (par->extradata_size)
772 avio_write(dyn_cp, par->extradata, par->extradata_size);
774 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
777 if (par->codec_id == AV_CODEC_ID_PRORES &&
778 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
779 avio_wl32(dyn_cp, par->codec_tag);
780 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
781 avio_write(dyn_cp, par->extradata, par->extradata_size);
787 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
788 AVCodecParameters *par,
789 int native_id, int qt_id)
793 int ret, codecpriv_size;
795 ret = avio_open_dyn_buf(&dyn_cp);
800 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
801 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
804 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
806 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
807 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
810 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
811 avio_wl32(dyn_cp, par->codec_tag);
812 for(i = 0; i < 0x5a - 8; i++)
815 avio_write(dyn_cp, par->extradata, par->extradata_size);
817 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
818 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
819 avcodec_get_name(par->codec_id));
822 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
824 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
825 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
826 avcodec_get_name(par->codec_id));
827 ret = AVERROR(EINVAL);
830 ff_put_bmp_header(dyn_cp, par, 0, 0);
832 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
834 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
836 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
837 avcodec_get_name(par->codec_id));
838 ret = AVERROR(EINVAL);
841 par->codec_tag = tag;
843 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
846 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
848 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
850 ffio_free_dyn_buf(&dyn_cp);
854 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
856 uint8_t *colorinfo_ptr;
857 int side_data_size = 0;
858 int ret, colorinfo_size;
859 const uint8_t *side_data;
861 ret = avio_open_dyn_buf(&dyn_cp);
865 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
866 par->color_trc < AVCOL_TRC_NB) {
867 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
870 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
871 par->color_space < AVCOL_SPC_NB) {
872 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
874 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
875 par->color_primaries < AVCOL_PRI_NB) {
876 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
878 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
879 par->color_range < AVCOL_RANGE_NB) {
880 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
882 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
883 par->chroma_location <= AVCHROMA_LOC_TOP) {
886 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
887 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
888 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
891 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
893 if (side_data_size) {
894 const AVContentLightMetadata *metadata =
895 (const AVContentLightMetadata*)side_data;
896 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
897 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
900 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
902 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
903 ebml_master meta_element = start_ebml_master(
904 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
905 const AVMasteringDisplayMetadata *metadata =
906 (const AVMasteringDisplayMetadata*)side_data;
907 if (metadata->has_primaries) {
908 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
909 av_q2d(metadata->display_primaries[0][0]));
910 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
911 av_q2d(metadata->display_primaries[0][1]));
912 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
913 av_q2d(metadata->display_primaries[1][0]));
914 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
915 av_q2d(metadata->display_primaries[1][1]));
916 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
917 av_q2d(metadata->display_primaries[2][0]));
918 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
919 av_q2d(metadata->display_primaries[2][1]));
920 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
921 av_q2d(metadata->white_point[0]));
922 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
923 av_q2d(metadata->white_point[1]));
925 if (metadata->has_luminance) {
926 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
927 av_q2d(metadata->max_luminance));
928 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
929 av_q2d(metadata->min_luminance));
931 end_ebml_master(dyn_cp, meta_element);
934 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
935 if (colorinfo_size) {
936 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
937 avio_write(pb, colorinfo_ptr, colorinfo_size);
938 end_ebml_master(pb, colorinfo);
940 ffio_free_dyn_buf(&dyn_cp);
944 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
947 ebml_master projection;
948 int side_data_size = 0;
951 const AVSphericalMapping *spherical =
952 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
958 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
959 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
960 spherical->projection != AV_SPHERICAL_CUBEMAP) {
961 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
965 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
966 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
967 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
968 4 * (2 + 1 + 8) + (2 + 1 + 20));
970 switch (spherical->projection) {
971 case AV_SPHERICAL_EQUIRECTANGULAR:
972 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
973 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
975 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
976 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
977 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
978 AV_WB32(private, 0); // version + flags
979 AV_WB32(private + 4, spherical->bound_top);
980 AV_WB32(private + 8, spherical->bound_bottom);
981 AV_WB32(private + 12, spherical->bound_left);
982 AV_WB32(private + 16, spherical->bound_right);
983 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
986 case AV_SPHERICAL_CUBEMAP:
987 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
988 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
989 AV_WB32(private, 0); // version + flags
990 AV_WB32(private + 4, 0); // layout
991 AV_WB32(private + 8, spherical->padding);
992 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
1000 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
1001 (double) spherical->yaw / (1 << 16));
1002 if (spherical->pitch)
1003 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
1004 (double) spherical->pitch / (1 << 16));
1005 if (spherical->roll)
1006 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
1007 (double) spherical->roll / (1 << 16));
1009 end_ebml_master(pb, projection);
1014 static void mkv_write_field_order(AVIOContext *pb, int mode,
1015 enum AVFieldOrder field_order)
1017 switch (field_order) {
1018 case AV_FIELD_UNKNOWN:
1020 case AV_FIELD_PROGRESSIVE:
1021 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1022 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
1028 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1029 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
1030 if (mode != MODE_WEBM) {
1031 switch (field_order) {
1033 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1034 MATROSKA_VIDEO_FIELDORDER_TT);
1037 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1038 MATROSKA_VIDEO_FIELDORDER_BB);
1041 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1042 MATROSKA_VIDEO_FIELDORDER_TB);
1045 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1046 MATROSKA_VIDEO_FIELDORDER_BT);
1053 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1054 AVStream *st, int mode, int *h_width, int *h_height)
1058 AVDictionaryEntry *tag;
1059 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1063 // convert metadata into proper side data and add it to the stream
1064 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1065 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1066 int stereo_mode = atoi(tag->value);
1068 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1069 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1074 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1075 stereo_mode != 10 && stereo_mode != 12) {
1076 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1082 // iterate to find the stereo3d side data
1083 for (i = 0; i < st->nb_side_data; i++) {
1084 AVPacketSideData sd = st->side_data[i];
1085 if (sd.type == AV_PKT_DATA_STEREO3D) {
1086 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1088 switch (stereo->type) {
1089 case AV_STEREO3D_2D:
1090 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1092 case AV_STEREO3D_SIDEBYSIDE:
1093 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1094 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1095 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1098 case AV_STEREO3D_TOPBOTTOM:
1099 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1100 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1104 case AV_STEREO3D_CHECKERBOARD:
1105 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1106 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1109 case AV_STEREO3D_LINES:
1110 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1111 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1115 case AV_STEREO3D_COLUMNS:
1116 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1117 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1121 case AV_STEREO3D_FRAMESEQUENCE:
1122 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1123 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1131 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1134 // if webm, do not write unsupported modes
1135 if ((mode == MODE_WEBM &&
1136 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1137 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1138 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1139 av_log(s, AV_LOG_ERROR,
1140 "The specified stereo mode is not valid.\n");
1141 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1142 return AVERROR(EINVAL);
1145 // write StereoMode if format is valid
1146 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1151 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1152 int i, AVIOContext *pb, int default_stream_exists)
1154 AVStream *st = s->streams[i];
1155 AVCodecParameters *par = st->codecpar;
1156 ebml_master subinfo, track;
1159 int bit_depth = av_get_bits_per_sample(par->codec_id);
1160 int sample_rate = par->sample_rate;
1161 int output_sample_rate = 0;
1162 int display_width_div = 1;
1163 int display_height_div = 1;
1165 AVDictionaryEntry *tag;
1167 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1168 mkv->have_attachments = 1;
1172 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1173 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1174 if (par->bits_per_raw_sample)
1175 bit_depth = par->bits_per_raw_sample;
1177 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1180 bit_depth = par->bits_per_coded_sample;
1183 if (par->codec_id == AV_CODEC_ID_AAC) {
1184 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1185 &output_sample_rate);
1190 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1191 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1192 mkv->is_dash ? mkv->dash_track_number : i + 1);
1193 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1194 mkv->is_dash ? mkv->dash_track_number : i + 1);
1195 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1197 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1198 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1199 tag = av_dict_get(st->metadata, "language", NULL, 0);
1200 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1201 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1202 } else if (tag && tag->value) {
1203 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1206 // The default value for TRACKFLAGDEFAULT is 1, so add element
1207 // if we need to clear it.
1208 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1209 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1211 if (st->disposition & AV_DISPOSITION_FORCED)
1212 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1214 if (mkv->mode == MODE_WEBM) {
1215 const char *codec_id;
1216 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1217 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1218 if (ff_webm_codec_tags[j].id == par->codec_id) {
1219 codec_id = ff_webm_codec_tags[j].str;
1224 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1225 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1226 codec_id = "D_WEBVTT/CAPTIONS";
1227 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1228 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1229 codec_id = "D_WEBVTT/DESCRIPTIONS";
1230 native_id = MATROSKA_TRACK_TYPE_METADATA;
1231 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1232 codec_id = "D_WEBVTT/METADATA";
1233 native_id = MATROSKA_TRACK_TYPE_METADATA;
1235 codec_id = "D_WEBVTT/SUBTITLES";
1236 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1241 av_log(s, AV_LOG_ERROR,
1242 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1243 return AVERROR(EINVAL);
1246 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1248 // look for a codec ID string specific to mkv to use,
1249 // if none are found, use AVI codes
1250 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1251 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1252 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1253 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1259 if (mkv->allow_raw_vfw) {
1262 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1263 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1264 return AVERROR(EINVAL);
1269 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1270 int64_t codecdelay = av_rescale_q(par->initial_padding,
1271 (AVRational){ 1, 48000 },
1272 (AVRational){ 1, 1000000000 });
1273 if (codecdelay < 0) {
1274 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1275 return AVERROR(EINVAL);
1277 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1278 // (AVRational){ 1, par->sample_rate },
1281 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1283 if (par->codec_id == AV_CODEC_ID_OPUS) {
1284 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1287 switch (par->codec_type) {
1288 case AVMEDIA_TYPE_VIDEO:
1289 mkv->have_video = 1;
1290 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1292 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1293 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1294 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1295 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1296 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1297 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1300 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1301 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1302 par->codec_id == AV_CODEC_ID_SVQ1 ||
1303 par->codec_id == AV_CODEC_ID_SVQ3 ||
1304 par->codec_id == AV_CODEC_ID_CINEPAK))
1308 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1309 else if (!native_id) {
1310 // if there is no mkv-specific codec ID, use VFW mode
1311 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1312 mkv->tracks[i].write_dts = 1;
1313 s->internal->avoid_negative_ts_use_pts = 0;
1316 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1318 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1319 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1321 mkv_write_field_order(pb, mkv->mode, par->field_order);
1323 // check both side data and metadata for stereo information,
1324 // write the result to the bitstream if any is found
1325 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1327 &display_height_div);
1331 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1332 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1333 (par->format == AV_PIX_FMT_YUVA420P)) {
1334 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1337 // write DisplayWidth and DisplayHeight, they contain the size of
1338 // a single source view and/or the display aspect ratio
1339 if (st->sample_aspect_ratio.num) {
1340 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1341 if (d_width > INT_MAX) {
1342 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1343 return AVERROR(EINVAL);
1345 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1346 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1347 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1348 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1350 AVRational display_aspect_ratio;
1351 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1352 par->width * (int64_t)st->sample_aspect_ratio.num,
1353 par->height * (int64_t)st->sample_aspect_ratio.den,
1355 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1356 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1357 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1360 } else if (display_width_div != 1 || display_height_div != 1) {
1361 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1362 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1363 } else if (mkv->mode != MODE_WEBM)
1364 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1366 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1367 uint32_t color_space = av_le2ne32(par->codec_tag);
1368 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1370 ret = mkv_write_video_color(pb, par, st);
1373 ret = mkv_write_video_projection(s, pb, st);
1376 end_ebml_master(pb, subinfo);
1379 case AVMEDIA_TYPE_AUDIO:
1380 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1383 // no mkv-specific ID, use ACM mode
1384 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1386 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1387 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1389 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1390 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1391 if (output_sample_rate)
1392 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1394 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1395 end_ebml_master(pb, subinfo);
1398 case AVMEDIA_TYPE_SUBTITLE:
1400 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1401 return AVERROR(ENOSYS);
1404 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1405 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1407 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1410 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1411 return AVERROR(EINVAL);
1414 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1415 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1416 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1421 end_ebml_master(pb, track);
1426 static int mkv_write_tracks(AVFormatContext *s)
1428 MatroskaMuxContext *mkv = s->priv_data;
1429 AVIOContext *pb = s->pb;
1430 int i, ret, default_stream_exists = 0;
1432 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1436 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1440 for (i = 0; i < s->nb_streams; i++) {
1441 AVStream *st = s->streams[i];
1442 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1444 for (i = 0; i < s->nb_streams; i++) {
1445 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1450 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1451 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, &mkv->tracks_pos);
1453 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
1458 static int mkv_write_chapters(AVFormatContext *s)
1460 MatroskaMuxContext *mkv = s->priv_data;
1461 AVIOContext *dyn_cp, *pb = s->pb;
1462 ebml_master editionentry;
1463 AVRational scale = {1, 1E9};
1466 if (!s->nb_chapters || mkv->wrote_chapters)
1469 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1470 if (ret < 0) return ret;
1472 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1473 if (ret < 0) return ret;
1475 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1476 if (mkv->mode != MODE_WEBM) {
1477 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1478 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1480 for (i = 0; i < s->nb_chapters; i++) {
1481 ebml_master chapteratom, chapterdisplay;
1482 AVChapter *c = s->chapters[i];
1483 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1484 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1485 AVDictionaryEntry *t = NULL;
1486 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1487 av_log(s, AV_LOG_ERROR,
1488 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1489 chapterstart, chapterend);
1490 return AVERROR_INVALIDDATA;
1493 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1494 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1495 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1496 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1497 if (mkv->mode != MODE_WEBM) {
1498 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1499 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1501 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1502 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1503 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1504 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1505 end_ebml_master(dyn_cp, chapterdisplay);
1507 end_ebml_master(dyn_cp, chapteratom);
1509 end_ebml_master(dyn_cp, editionentry);
1510 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1512 mkv->wrote_chapters = 1;
1516 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1518 uint8_t *key = av_strdup(t->key);
1520 const uint8_t *lang = NULL;
1524 return AVERROR(ENOMEM);
1526 if ((p = strrchr(p, '-')) &&
1527 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1534 else if (*p >= 'a' && *p <= 'z')
1539 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1540 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1542 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1543 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1544 end_ebml_master(pb, tag);
1550 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1551 unsigned int uid, ebml_master *tag)
1554 MatroskaMuxContext *mkv = s->priv_data;
1555 ebml_master targets;
1558 if (!mkv->tags_bc) {
1559 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1560 if (ret < 0) return ret;
1562 start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1566 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1567 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1569 put_ebml_uint(pb, elementid, uid);
1570 end_ebml_master(pb, targets);
1574 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1576 return av_strcasecmp(name, "title") &&
1577 av_strcasecmp(name, "stereo_mode") &&
1578 av_strcasecmp(name, "creation_time") &&
1579 av_strcasecmp(name, "encoding_tool") &&
1580 av_strcasecmp(name, "duration") &&
1581 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1582 av_strcasecmp(name, "language")) &&
1583 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1584 (av_strcasecmp(name, "filename") &&
1585 av_strcasecmp(name, "mimetype")));
1588 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1591 MatroskaMuxContext *mkv = s->priv_data;
1594 AVDictionaryEntry *t = NULL;
1596 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1600 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1601 if (mkv_check_tag_name(t->key, elementid)) {
1602 ret = mkv_write_simpletag(mkv->tags_bc, t);
1608 end_ebml_master(mkv->tags_bc, tag);
1612 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1614 AVDictionaryEntry *t = NULL;
1616 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1617 if (mkv_check_tag_name(t->key, elementid))
1623 static int mkv_write_tags(AVFormatContext *s)
1625 MatroskaMuxContext *mkv = s->priv_data;
1628 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1630 if (mkv_check_tag(s->metadata, 0)) {
1631 ret = mkv_write_tag(s, s->metadata, 0, 0);
1632 if (ret < 0) return ret;
1635 for (i = 0; i < s->nb_streams; i++) {
1636 AVStream *st = s->streams[i];
1638 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1641 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1644 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1645 if (ret < 0) return ret;
1648 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1649 for (i = 0; i < s->nb_streams; i++) {
1651 AVStream *st = s->streams[i];
1652 ebml_master tag_target;
1655 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1658 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tag_target);
1661 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1662 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1663 mkv->tracks[i].duration_offset = avio_tell(pb);
1665 // Reserve space to write duration as a 20-byte string.
1666 // 2 (ebml id) + 1 (data size) + 20 (data)
1667 put_ebml_void(pb, 23);
1668 end_ebml_master(pb, tag);
1669 end_ebml_master(pb, tag_target);
1673 if (mkv->mode != MODE_WEBM) {
1674 for (i = 0; i < s->nb_chapters; i++) {
1675 AVChapter *ch = s->chapters[i];
1677 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1680 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1686 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1687 for (i = 0; i < mkv->attachments->num_entries; i++) {
1688 mkv_attachment *attachment = &mkv->attachments->entries[i];
1689 AVStream *st = s->streams[attachment->stream_idx];
1691 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1694 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1701 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1702 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, &mkv->tags_pos);
1704 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv);
1709 static int mkv_write_attachments(AVFormatContext *s)
1711 MatroskaMuxContext *mkv = s->priv_data;
1712 AVIOContext *dyn_cp, *pb = s->pb;
1716 if (!mkv->have_attachments)
1719 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1720 if (!mkv->attachments)
1721 return AVERROR(ENOMEM);
1723 av_lfg_init(&c, av_get_random_seed());
1725 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1726 if (ret < 0) return ret;
1728 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1729 if (ret < 0) return ret;
1731 for (i = 0; i < s->nb_streams; i++) {
1732 AVStream *st = s->streams[i];
1733 ebml_master attached_file;
1734 mkv_attachment *attachment = mkv->attachments->entries;
1735 AVDictionaryEntry *t;
1736 const char *mimetype = NULL;
1739 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1742 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1744 return AVERROR(ENOMEM);
1745 mkv->attachments->entries = attachment;
1747 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1749 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1750 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1751 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1752 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1753 return AVERROR(EINVAL);
1755 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1756 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1757 mimetype = t->value;
1758 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1760 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1761 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1762 mimetype = ff_mkv_mime_tags[i].str;
1765 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1766 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1767 mimetype = ff_mkv_image_mime_tags[i].str;
1772 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1773 "it cannot be deduced from the codec id.\n", i);
1774 return AVERROR(EINVAL);
1777 if (s->flags & AVFMT_FLAG_BITEXACT) {
1778 struct AVSHA *sha = av_sha_alloc();
1781 return AVERROR(ENOMEM);
1782 av_sha_init(sha, 160);
1783 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1784 av_sha_final(sha, digest);
1786 fileuid = AV_RL32(digest);
1788 fileuid = av_lfg_get(&c);
1790 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1791 fileuid, mkv->attachments->num_entries);
1793 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1794 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1795 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1796 end_ebml_master(dyn_cp, attached_file);
1798 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1799 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1801 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1806 static int64_t get_metadata_duration(AVFormatContext *s)
1812 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1813 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1814 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1818 for (i = 0; i < s->nb_streams; i++) {
1820 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1822 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1823 max = FFMAX(max, us);
1826 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1830 static int mkv_write_header(AVFormatContext *s)
1832 MatroskaMuxContext *mkv = s->priv_data;
1833 AVIOContext *pb = s->pb;
1834 ebml_master ebml_header;
1835 AVDictionaryEntry *tag;
1836 int ret, i, version = 2;
1837 int64_t creation_time;
1839 if (!strcmp(s->oformat->name, "webm")) {
1840 mkv->mode = MODE_WEBM;
1843 mkv->mode = MODE_MATROSKAv2;
1845 if (mkv->mode != MODE_WEBM ||
1846 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1847 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1850 for (i = 0; i < s->nb_streams; i++) {
1851 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1852 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1853 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1857 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1859 return AVERROR(ENOMEM);
1861 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1862 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1863 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1864 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1865 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1866 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1867 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1868 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1869 end_ebml_master(pb, ebml_header);
1871 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1872 mkv->segment_offset = avio_tell(pb);
1874 // we write a seek head at the beginning to point to all other level
1875 // one elements, which aren't more than 10 elements as we write only one
1876 // of every other currently defined level 1 element
1877 mkv->seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1878 if (!mkv->seekhead) {
1879 return AVERROR(ENOMEM);
1882 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1886 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1891 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1892 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1893 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1894 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1895 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1896 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1897 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1899 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1901 if (mkv->mode != MODE_WEBM) {
1902 uint32_t segment_uid[4];
1905 av_lfg_init(&lfg, av_get_random_seed());
1907 for (i = 0; i < 4; i++)
1908 segment_uid[i] = av_lfg_get(&lfg);
1910 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1913 const char *ident = "Lavf";
1914 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1915 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1918 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1919 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1920 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1921 uint8_t date_utc_buf[8];
1922 AV_WB64(date_utc_buf, date_utc);
1923 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1926 // reserve space for the duration
1928 mkv->duration_offset = avio_tell(pb);
1929 if (!mkv->is_live) {
1930 int64_t metadata_duration = get_metadata_duration(s);
1932 if (s->duration > 0) {
1933 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1934 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1935 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1936 } else if (metadata_duration > 0) {
1937 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1938 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1939 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1941 put_ebml_void(pb, 11); // assumes double-precision float to be written
1944 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1945 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, &mkv->info_pos);
1947 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv);
1950 ret = mkv_write_tracks(s);
1954 for (i = 0; i < s->nb_chapters; i++)
1955 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1957 ret = mkv_write_chapters(s);
1961 if (mkv->mode != MODE_WEBM) {
1962 ret = mkv_write_attachments(s);
1967 ret = mkv_write_tags(s);
1971 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1972 mkv_write_seekhead(pb, mkv);
1974 mkv->cues = mkv_start_cues(mkv->segment_offset);
1976 return AVERROR(ENOMEM);
1979 if (s->metadata_header_padding > 0) {
1980 if (s->metadata_header_padding == 1)
1981 s->metadata_header_padding++;
1982 put_ebml_void(pb, s->metadata_header_padding);
1985 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1986 mkv->cues_pos = avio_tell(pb);
1987 if (mkv->reserve_cues_space == 1)
1988 mkv->reserve_cues_space++;
1989 put_ebml_void(pb, mkv->reserve_cues_space);
1992 av_init_packet(&mkv->cur_audio_pkt);
1993 mkv->cur_audio_pkt.size = 0;
1994 mkv->cluster_pos = -1;
1996 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1997 // after 4k and on a keyframe
1998 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1999 if (mkv->cluster_time_limit < 0)
2000 mkv->cluster_time_limit = 5000;
2001 if (mkv->cluster_size_limit < 0)
2002 mkv->cluster_size_limit = 5 * 1024 * 1024;
2004 if (mkv->cluster_time_limit < 0)
2005 mkv->cluster_time_limit = 1000;
2006 if (mkv->cluster_size_limit < 0)
2007 mkv->cluster_size_limit = 32 * 1024;
2013 static int mkv_blockgroup_size(int pkt_size)
2015 int size = pkt_size + 4;
2016 size += ebml_num_size(size);
2017 size += 2; // EBML ID for block and block duration
2018 size += 9; // max size of block duration incl. length field
2022 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
2029 dst = av_malloc(srclen);
2031 return AVERROR(ENOMEM);
2033 while (srclen >= WV_HEADER_SIZE) {
2036 ret = ff_wv_parse_header(&header, src);
2039 src += WV_HEADER_SIZE;
2040 srclen -= WV_HEADER_SIZE;
2042 if (srclen < header.blocksize) {
2043 ret = AVERROR_INVALIDDATA;
2047 if (header.initial) {
2048 AV_WL32(dst + offset, header.samples);
2051 AV_WL32(dst + offset, header.flags);
2052 AV_WL32(dst + offset + 4, header.crc);
2055 if (!(header.initial && header.final)) {
2056 AV_WL32(dst + offset, header.blocksize);
2060 memcpy(dst + offset, src, header.blocksize);
2061 src += header.blocksize;
2062 srclen -= header.blocksize;
2063 offset += header.blocksize;
2075 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2076 uint32_t blockid, AVPacket *pkt, int keyframe)
2078 MatroskaMuxContext *mkv = s->priv_data;
2079 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2080 mkv_track *track = &mkv->tracks[pkt->stream_index];
2081 uint8_t *data = NULL, *side_data = NULL;
2082 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2083 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2084 uint64_t additional_id = 0;
2085 int64_t discard_padding = 0;
2086 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2087 ebml_master block_group, block_additions, block_more;
2089 ts += track->ts_offset;
2091 /* The following string is identical to the one in mkv_write_vtt_blocks
2092 * so that only one copy needs to exist in binaries. */
2093 av_log(s, AV_LOG_DEBUG,
2094 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2095 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2096 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2097 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2098 mkv->cluster_pos, track_number, keyframe != 0);
2100 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2101 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2102 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2103 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2104 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2105 /* extradata is Annex B, assume the bitstream is too and convert it */
2106 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2107 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2108 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2109 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2110 err = mkv_strip_wavpack(pkt->data, &data, &size);
2115 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2116 "a packet from stream %d.\n", pkt->stream_index);
2120 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2121 /* Matroska specification requires to remove the first QuickTime atom
2127 side_data = av_packet_get_side_data(pkt,
2128 AV_PKT_DATA_SKIP_SAMPLES,
2130 if (side_data && side_data_size >= 10) {
2131 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2132 (AVRational){1, par->sample_rate},
2133 (AVRational){1, 1000000000});
2136 side_data = av_packet_get_side_data(pkt,
2137 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2140 additional_id = AV_RB64(side_data);
2142 side_data_size -= 8;
2145 if ((side_data_size && additional_id == 1) || discard_padding) {
2146 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2147 blockid = MATROSKA_ID_BLOCK;
2150 put_ebml_id(pb, blockid);
2151 put_ebml_num(pb, size + 4, 0);
2152 // this assumes stream_index is less than 126
2153 avio_w8(pb, 0x80 | track_number);
2154 avio_wb16(pb, ts - mkv->cluster_pts);
2155 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2156 avio_write(pb, data + offset, size);
2157 if (data != pkt->data)
2160 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2161 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2163 track->last_timestamp = ts;
2165 if (discard_padding) {
2166 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2169 if (side_data_size && additional_id == 1) {
2170 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2171 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2172 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2173 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2174 put_ebml_num(pb, side_data_size, 0);
2175 avio_write(pb, side_data, side_data_size);
2176 end_ebml_master(pb, block_more);
2177 end_ebml_master(pb, block_additions);
2179 if ((side_data_size && additional_id == 1) || discard_padding) {
2180 end_ebml_master(pb, block_group);
2186 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2188 MatroskaMuxContext *mkv = s->priv_data;
2189 ebml_master blockgroup;
2190 int id_size, settings_size, size;
2191 uint8_t *id, *settings;
2192 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2193 const int flags = 0;
2196 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2200 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2203 size = id_size + 1 + settings_size + 1 + pkt->size;
2205 /* The following string is identical to the one in mkv_write_block so that
2206 * only one copy needs to exist in binaries. */
2207 av_log(s, AV_LOG_DEBUG,
2208 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2209 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2210 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2211 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2212 mkv->cluster_pos, pkt->stream_index + 1, 1);
2214 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2216 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2217 put_ebml_num(pb, size + 4, 0);
2218 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2219 avio_wb16(pb, ts - mkv->cluster_pts);
2221 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2223 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2224 end_ebml_master(pb, blockgroup);
2226 return pkt->duration;
2229 static void mkv_end_cluster(AVFormatContext *s)
2231 MatroskaMuxContext *mkv = s->priv_data;
2233 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2234 mkv->cluster_pos = -1;
2235 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2238 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2240 MatroskaMuxContext *mkv = s->priv_data;
2241 mkv_track *track = &mkv->tracks[pkt->stream_index];
2242 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2244 int side_data_size = 0, ret;
2246 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2249 switch (par->codec_id) {
2250 case AV_CODEC_ID_AAC:
2251 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2252 int filler, output_sample_rate = 0;
2254 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2255 &output_sample_rate);
2258 if (!output_sample_rate)
2259 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2260 ret = ff_alloc_extradata(par, side_data_size);
2263 memcpy(par->extradata, side_data, side_data_size);
2264 curpos = avio_tell(mkv->tracks_bc);
2265 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2266 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2267 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2269 put_ebml_void(mkv->tracks_bc, filler);
2270 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2271 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2272 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2273 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2274 } else if (!par->extradata_size && !track->sample_rate) {
2275 // No extradata (codecpar or packet side data).
2276 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2277 return AVERROR(EINVAL);
2280 case AV_CODEC_ID_FLAC:
2281 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2282 AVCodecParameters *codecpriv_par;
2284 if (side_data_size != par->extradata_size) {
2285 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2287 return AVERROR(EINVAL);
2289 codecpriv_par = avcodec_parameters_alloc();
2291 return AVERROR(ENOMEM);
2292 ret = avcodec_parameters_copy(codecpriv_par, par);
2294 avcodec_parameters_free(&codecpriv_par);
2297 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2298 curpos = avio_tell(mkv->tracks_bc);
2299 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2300 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2301 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2302 avcodec_parameters_free(&codecpriv_par);
2305 // FIXME: Remove the following once libaom starts propagating extradata during init()
2306 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2307 case AV_CODEC_ID_AV1:
2308 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2309 !par->extradata_size) {
2310 AVIOContext *dyn_cp;
2314 ret = avio_open_dyn_buf(&dyn_cp);
2317 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2318 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2319 if (!codecpriv_size) {
2321 return AVERROR_INVALIDDATA;
2323 curpos = avio_tell(mkv->tracks_bc);
2324 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2325 // Do not write the OBUs as we don't have space saved for them
2326 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2328 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2329 ret = ff_alloc_extradata(par, side_data_size);
2332 memcpy(par->extradata, side_data, side_data_size);
2333 } else if (!par->extradata_size)
2334 return AVERROR_INVALIDDATA;
2338 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2345 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2347 MatroskaMuxContext *mkv = s->priv_data;
2349 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2350 mkv_track *track = &mkv->tracks[pkt->stream_index];
2351 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2352 int duration = pkt->duration;
2354 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2355 int64_t relative_packet_pos;
2356 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2358 if (ts == AV_NOPTS_VALUE) {
2359 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2360 return AVERROR(EINVAL);
2362 ts += track->ts_offset;
2364 if (mkv->cluster_pos != -1) {
2365 int64_t cluster_time = ts - mkv->cluster_pts;
2366 if ((int16_t)cluster_time != cluster_time) {
2368 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2372 if (mkv->cluster_pos == -1) {
2373 mkv->cluster_pos = avio_tell(s->pb);
2374 ret = start_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2377 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2378 mkv->cluster_pts = FFMAX(0, ts);
2379 av_log(s, AV_LOG_DEBUG,
2380 "Starting new cluster with timestamp "
2381 "%" PRId64 " at offset %" PRId64 " bytes\n",
2382 mkv->cluster_pts, mkv->cluster_pos);
2384 pb = mkv->cluster_bc;
2386 relative_packet_pos = avio_tell(pb);
2388 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2389 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2392 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2393 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2394 if (ret < 0) return ret;
2397 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2398 duration = mkv_write_vtt_blocks(s, pb, pkt);
2400 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2401 mkv_blockgroup_size(pkt->size));
2403 #if FF_API_CONVERGENCE_DURATION
2404 FF_DISABLE_DEPRECATION_WARNINGS
2405 /* For backward compatibility, prefer convergence_duration. */
2406 if (pkt->convergence_duration > 0) {
2407 duration = pkt->convergence_duration;
2409 FF_ENABLE_DEPRECATION_WARNINGS
2411 /* All subtitle blocks are considered to be keyframes. */
2412 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2413 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2414 end_ebml_master(pb, blockgroup);
2417 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2418 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts,
2419 mkv->cluster_pos, relative_packet_pos, duration);
2425 mkv->duration = FFMAX(mkv->duration, ts + duration);
2426 track->duration = FFMAX(track->duration, ts + duration);
2431 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2433 MatroskaMuxContext *mkv = s->priv_data;
2434 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2435 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2437 int64_t cluster_time;
2439 int start_new_cluster;
2441 ret = mkv_check_new_extra_data(s, pkt);
2445 if (mkv->tracks[pkt->stream_index].write_dts)
2446 cluster_time = pkt->dts - mkv->cluster_pts;
2448 cluster_time = pkt->pts - mkv->cluster_pts;
2449 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2451 cluster_size = avio_tell(mkv->cluster_bc);
2453 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2454 // WebM DASH specification states that the first block of every cluster
2455 // has to be a key frame. So for DASH video, we only create a cluster
2456 // on seeing key frames.
2457 start_new_cluster = keyframe;
2458 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2459 (mkv->cluster_pos == -1 ||
2460 cluster_time > mkv->cluster_time_limit)) {
2461 // For DASH audio, we create a Cluster based on cluster_time_limit
2462 start_new_cluster = 1;
2463 } else if (!mkv->is_dash &&
2464 (cluster_size > mkv->cluster_size_limit ||
2465 cluster_time > mkv->cluster_time_limit ||
2466 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2467 cluster_size > 4 * 1024))) {
2468 start_new_cluster = 1;
2470 start_new_cluster = 0;
2473 if (mkv->cluster_pos != -1 && start_new_cluster) {
2477 if (!mkv->cluster_pos)
2478 avio_write_marker(s->pb,
2479 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2480 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2482 // check if we have an audio packet cached
2483 if (mkv->cur_audio_pkt.size > 0) {
2484 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2485 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2486 mkv->is_dash ? start_new_cluster : 0);
2487 av_packet_unref(&mkv->cur_audio_pkt);
2489 av_log(s, AV_LOG_ERROR,
2490 "Could not write cached audio packet ret:%d\n", ret);
2495 // buffer an audio packet to ensure the packet containing the video
2496 // keyframe's timecode is contained in the same cluster for WebM
2497 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2499 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2501 ret = mkv_write_packet_internal(s, pkt, 0);
2505 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2507 MatroskaMuxContext *mkv = s->priv_data;
2510 if (mkv->cluster_pos != -1) {
2512 av_log(s, AV_LOG_DEBUG,
2513 "Flushing cluster at offset %" PRIu64 " bytes\n",
2518 return mkv_write_packet(s, pkt);
2521 static int mkv_write_trailer(AVFormatContext *s)
2523 MatroskaMuxContext *mkv = s->priv_data;
2524 AVIOContext *pb = s->pb;
2525 int64_t currentpos, cuespos;
2528 // check if we have an audio packet cached
2529 if (mkv->cur_audio_pkt.size > 0) {
2530 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2532 av_log(s, AV_LOG_ERROR,
2533 "Could not write cached audio packet ret:%d\n", ret);
2538 if (mkv->cluster_bc) {
2539 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv);
2542 ret = mkv_write_chapters(s);
2547 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2548 if (mkv->cues->num_entries) {
2549 if (mkv->reserve_cues_space) {
2552 currentpos = avio_tell(pb);
2553 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2555 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2556 cues_end = avio_tell(pb);
2557 if (cues_end > cuespos + mkv->reserve_cues_space) {
2558 av_log(s, AV_LOG_ERROR,
2559 "Insufficient space reserved for cues: %d "
2560 "(needed: %" PRId64 ").\n",
2561 mkv->reserve_cues_space, cues_end - cuespos);
2562 return AVERROR(EINVAL);
2565 if (cues_end < cuespos + mkv->reserve_cues_space)
2566 put_ebml_void(pb, mkv->reserve_cues_space -
2567 (cues_end - cuespos));
2569 avio_seek(pb, currentpos, SEEK_SET);
2571 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2574 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CUES,
2580 mkv_write_seekhead(pb, mkv);
2582 // update the duration
2583 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2584 currentpos = avio_tell(pb);
2585 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2586 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2587 avio_seek(pb, mkv->info_pos, SEEK_SET);
2588 end_ebml_master_crc32(pb, &mkv->info_bc, mkv);
2590 // write tracks master
2591 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2592 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
2594 // update stream durations
2595 if (!mkv->is_live) {
2597 int64_t curr = avio_tell(mkv->tags_bc);
2598 for (i = 0; i < s->nb_streams; ++i) {
2599 AVStream *st = s->streams[i];
2600 mkv_track *track = &mkv->tracks[i];
2602 if (track->duration_offset > 0) {
2603 double duration_sec = track->duration * av_q2d(st->time_base);
2604 char duration_string[20] = "";
2606 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2609 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2611 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2612 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2613 fmod(duration_sec, 60));
2615 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2618 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2620 if (mkv->tags_bc && !mkv->is_live) {
2621 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2622 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv);
2625 avio_seek(pb, currentpos, SEEK_SET);
2628 if (!mkv->is_live) {
2629 end_ebml_master(pb, mkv->segment);
2635 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2638 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2639 if (ff_mkv_codec_tags[i].id == codec_id)
2642 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2643 enum AVMediaType type = avcodec_get_type(codec_id);
2644 // mkv theoretically supports any video/audio through VFW/ACM
2645 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2652 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2655 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2656 if (ff_webm_codec_tags[i].id == codec_id)
2662 static int mkv_init(struct AVFormatContext *s)
2666 if (s->nb_streams > MAX_TRACKS) {
2667 av_log(s, AV_LOG_ERROR,
2668 "At most %d streams are supported for muxing in Matroska\n",
2670 return AVERROR(EINVAL);
2673 for (i = 0; i < s->nb_streams; i++) {
2674 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2675 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2676 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2677 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2678 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2679 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2680 av_log(s, AV_LOG_ERROR,
2681 "The Matroska muxer does not yet support muxing %s\n",
2682 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2683 return AVERROR_PATCHWELCOME;
2687 if (s->avoid_negative_ts < 0) {
2688 s->avoid_negative_ts = 1;
2689 s->internal->avoid_negative_ts_use_pts = 1;
2692 for (i = 0; i < s->nb_streams; i++) {
2693 // ms precision is the de-facto standard timescale for mkv files
2694 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2700 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2703 AVStream *st = s->streams[pkt->stream_index];
2705 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2706 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2707 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2708 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2709 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2715 static const AVCodecTag additional_audio_tags[] = {
2716 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2717 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2718 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2719 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2720 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2721 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2722 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2723 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2724 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2725 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2726 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2727 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2728 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2731 static const AVCodecTag additional_video_tags[] = {
2732 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2733 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2734 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2735 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2738 static const AVCodecTag additional_subtitle_tags[] = {
2739 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2740 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2741 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2742 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2745 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2746 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2747 static const AVOption options[] = {
2748 { "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 },
2749 { "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 },
2750 { "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 },
2751 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2752 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2753 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2754 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2755 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2759 #if CONFIG_MATROSKA_MUXER
2760 static const AVClass matroska_class = {
2761 .class_name = "matroska muxer",
2762 .item_name = av_default_item_name,
2764 .version = LIBAVUTIL_VERSION_INT,
2767 AVOutputFormat ff_matroska_muxer = {
2769 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2770 .mime_type = "video/x-matroska",
2771 .extensions = "mkv",
2772 .priv_data_size = sizeof(MatroskaMuxContext),
2773 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2774 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2775 .video_codec = CONFIG_LIBX264_ENCODER ?
2776 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2778 .deinit = mkv_deinit,
2779 .write_header = mkv_write_header,
2780 .write_packet = mkv_write_flush_packet,
2781 .write_trailer = mkv_write_trailer,
2782 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2783 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2784 .codec_tag = (const AVCodecTag* const []){
2785 ff_codec_bmp_tags, ff_codec_wav_tags,
2786 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2788 .subtitle_codec = AV_CODEC_ID_ASS,
2789 .query_codec = mkv_query_codec,
2790 .check_bitstream = mkv_check_bitstream,
2791 .priv_class = &matroska_class,
2795 #if CONFIG_WEBM_MUXER
2796 static const AVClass webm_class = {
2797 .class_name = "webm muxer",
2798 .item_name = av_default_item_name,
2800 .version = LIBAVUTIL_VERSION_INT,
2803 AVOutputFormat ff_webm_muxer = {
2805 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2806 .mime_type = "video/webm",
2807 .extensions = "webm",
2808 .priv_data_size = sizeof(MatroskaMuxContext),
2809 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2810 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2811 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2813 .deinit = mkv_deinit,
2814 .write_header = mkv_write_header,
2815 .write_packet = mkv_write_flush_packet,
2816 .write_trailer = mkv_write_trailer,
2817 .query_codec = webm_query_codec,
2818 .check_bitstream = mkv_check_bitstream,
2819 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2820 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2821 .priv_class = &webm_class,
2825 #if CONFIG_MATROSKA_AUDIO_MUXER
2826 static const AVClass mka_class = {
2827 .class_name = "matroska audio muxer",
2828 .item_name = av_default_item_name,
2830 .version = LIBAVUTIL_VERSION_INT,
2832 AVOutputFormat ff_matroska_audio_muxer = {
2834 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2835 .mime_type = "audio/x-matroska",
2836 .extensions = "mka",
2837 .priv_data_size = sizeof(MatroskaMuxContext),
2838 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2839 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2840 .video_codec = AV_CODEC_ID_NONE,
2842 .deinit = mkv_deinit,
2843 .write_header = mkv_write_header,
2844 .write_packet = mkv_write_flush_packet,
2845 .write_trailer = mkv_write_trailer,
2846 .check_bitstream = mkv_check_bitstream,
2847 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2849 .codec_tag = (const AVCodecTag* const []){
2850 ff_codec_wav_tags, additional_audio_tags, 0
2852 .priv_class = &mka_class,