Function inferCodecFromCodecString

src/misc.ts:97–144

(codecString: string)

}

export const inferCodecFromCodecString = (codecString: string) => {
	// Video codecs
	if (codecString.startsWith('avc1') || codecString.startsWith('avc3')) {
		return AV_CODEC_ID_H264;
	} else if (codecString.startsWith('hev1') || codecString.startsWith('hvc1')) {
		return AV_CODEC_ID_HEVC;
	} else if (codecString === 'vp8') {
		return AV_CODEC_ID_VP8;
	} else if (codecString.startsWith('vp09')) {
		return AV_CODEC_ID_VP9;
	} else if (codecString.startsWith('av01')) {
		return AV_CODEC_ID_AV1;
	}

	// Audio codecs
	if (codecString.startsWith('mp4a.40') || codecString === 'mp4a.67') {
		return AV_CODEC_ID_AAC;
	} else if (
		codecString === 'mp3'
		|| codecString === 'mp4a.69'
		|| codecString === 'mp4a.6B'
		|| codecString === 'mp4a.6b'
	) {
		return AV_CODEC_ID_MP3;
	} else if (codecString === 'opus') {
		return AV_CODEC_ID_OPUS;
	} else if (codecString === 'vorbis') {
		return AV_CODEC_ID_VORBIS;
	} else if (codecString === 'flac') {
		return AV_CODEC_ID_FLAC;
	} else if (codecString === 'ulaw') {
		return AV_CODEC_ID_PCM_MULAW;
	} else if (codecString === 'alaw') {
		return AV_CODEC_ID_PCM_ALAW;
	} else if (codecString === 'pcm-u8') {
		return AV_CODEC_ID_PCM_U8;
	} else if (codecString === 'pcm-s16') {
		return AV_CODEC_ID_PCM_S16LE;
	} else if (codecString === 'pcm-s24') {
		return AV_CODEC_ID_PCM_S24LE;
	} else if (codecString === 'pcm-s32') {
		return AV_CODEC_ID_PCM_S32LE;
	} else if (codecString === 'pcm-f32') {
		return AV_CODEC_ID_PCM_F32LE;
	}

	return null;
};

export const getChannelLayout = (numChannels: number) => {
	switch (numChannels) {