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Add support for remaining audio codecs to Matroska muxer

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This commit is contained in:
Vanilagy
2025-01-06 21:09:12 +01:00
parent 7c65c2e7e9
commit 00408c86ff
6 changed files with 95 additions and 39 deletions
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src/matroska/matroska-muxer.ts
+29 -10
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@@ -32,8 +32,11 @@ import {
} from '../subtitles';
import {
AudioCodec,
PCM_CODECS,
PcmAudioCodec,
SubtitleCodec,
VideoCodec,
parsePcmCodec,
validateAudioChunkMetadata,
validateSubtitleMetadata,
validateVideoChunkMetadata,
@@ -103,15 +106,27 @@ type MatroskaAudioTrackData = MatroskaTrackData & { type: 'audio' };
type MatroskaSubtitleTrackData = MatroskaTrackData & { type: 'subtitle' };
const CODEC_STRING_MAP: Partial<Record<VideoCodec | AudioCodec | SubtitleCodec, string>> = {
avc: 'V_MPEG4/ISO/AVC',
hevc: 'V_MPEGH/ISO/HEVC',
vp8: 'V_VP8',
vp9: 'V_VP9',
av1: 'V_AV1',
aac: 'A_AAC', // TODO is this even correct
opus: 'A_OPUS',
vorbis: 'A_VORBIS',
webvtt: 'S_TEXT/WEBVTT',
'avc': 'V_MPEG4/ISO/AVC',
'hevc': 'V_MPEGH/ISO/HEVC',
'vp8': 'V_VP8',
'vp9': 'V_VP9',
'av1': 'V_AV1',
'aac': 'A_AAC',
'mp3': 'A_MPEG/L3',
'opus': 'A_OPUS',
'vorbis': 'A_VORBIS',
'flac': 'A_FLAC',
'pcm-u8': 'A_PCM/INT/LIT',
'pcm-s16': 'A_PCM/INT/LIT',
'pcm-s16be': 'A_PCM/INT/BIG',
'pcm-s24': 'A_PCM/INT/LIT',
'pcm-s24be': 'A_PCM/INT/BIG',
'pcm-s32': 'A_PCM/INT/LIT',
'pcm-s32be': 'A_PCM/INT/BIG',
'pcm-f32': 'A_PCM/FLOAT/IEEE',
'webvtt': 'S_TEXT/WEBVTT',
};
const TRACK_TYPE_MAP: Record<OutputTrack['type'], number> = {
@@ -470,6 +485,10 @@ export class MatroskaMuxer extends Muxer {
}
private audioSpecificTrackInfo(trackData: MatroskaAudioTrackData) {
const pcmInfo = (PCM_CODECS as readonly string[]).includes(trackData.track.source._codec)
? parsePcmCodec(trackData.track.source._codec as PcmAudioCodec)
: null;
return [
(trackData.info.decoderConfig.description
? {
@@ -480,7 +499,7 @@ export class MatroskaMuxer extends Muxer {
{ id: EBMLId.Audio, data: [
{ id: EBMLId.SamplingFrequency, data: new EBMLFloat32(trackData.info.sampleRate) },
{ id: EBMLId.Channels, data: trackData.info.numberOfChannels },
// TODO Bit depth for when PCM is a thing
pcmInfo ? { id: EBMLId.BitDepth, data: 8 * pcmInfo.sampleSize } : null,
] },
];
}