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Define DTS codec, add muxing and demuxing support across ISOBMFF, Matroska, and MPEG-TS, add DTS encode/decode support to @mediabunny/server

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Vanilagy
2026-08-15 16:19:12 +02:00
parent ae66f01566
commit 914907b5db
27 changed files with 1182 additions and 56 deletions
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docs/.vitepress/config.mts
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@@ -162,6 +162,7 @@ export default withMermaid({
{ text: 'FLAC', link: '/codec-registry/flac' },
{ text: 'AC-3', link: '/codec-registry/ac3' },
{ text: 'E-AC-3', link: '/codec-registry/eac3' },
{ text: 'DTS', link: '/codec-registry/dts' },
{ text: 'Linear PCM', link: '/codec-registry/pcm' },
{ text: 'μ-law PCM', link: '/codec-registry/ulaw' },
{ text: 'A-law PCM', link: '/codec-registry/alaw' },
docs/codec-registry/dts.md
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@@ -0,0 +1,44 @@
---
description: DTS (DTS Coherent Acoustics) audio codec definition, defining legal codec strings, decoder configs, and packet data formats.
---
<script setup>
import { VPBadge } from 'vitepress/theme'
</script>
<VPBadge type="info" text="Audio codec" />
# DTS codec registration
## Description
The DTS audio codec (DTS Coherent Acoustics), specified in [ETSI TS 102 114](https://www.etsi.org/deliver/etsi_ts/102100_102199/102114/01.06.01_60/ts_102114v010601p.pdf).
## Codec ID
```ts
'dts'
```
## `EncodedPacket` data
The packet's data must be a core substream frame as defined in Section 5 of [ETSI TS 102 114](https://www.etsi.org/deliver/etsi_ts/102100_102199/102114/01.06.01_60/ts_102114v010601p.pdf), beginning with the sync word `0x7FFE8001`, followed by any number of extension substreams as defined in Section 7.4.1 of [ETSI TS 102 114](https://www.etsi.org/deliver/etsi_ts/102100_102199/102114/01.06.01_60/ts_102114v010601p.pdf), each beginning with the sync word `0x64582025`. The core substream frame may be omitted.
The bitstream must use 16-bit big-endian packing.
## `EncodedPacket` type
The packet's type is always `'key'`.
## `AudioDecoderConfig` codec string
The codec string must be one of the four four-character codes identifying which substreams the bitstream is built from:
- `'dtsc'` - a core substream only
- `'dtsh'` - a core substream with extension substreams
- `'dtsl'` - extension substreams carrying lossless audio, with no core substream
- `'dtse'` - DTS Express
## `AudioDecoderConfig` description
`description` is not used for this codec.
docs/codec-registry/overview.md
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@@ -26,6 +26,7 @@ The registry is an extension of the [WebCodecs Codec Registry](https://www.w3.or
- [FLAC](./flac)
- [AC-3](./ac3)
- [E-AC-3](./eac3)
- [DTS](./dts)
- [Linear PCM](./pcm)
- [μ-law PCM](./ulaw)
- [A-law PCM](./alaw)
docs/guide/extensions/server.md
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@@ -8,7 +8,7 @@ By default, Mediabunny requires a browser environment for full access to decoder
Features added by this package include:
- Video decoders and encoders for AVC (H.264), HEVC (H.265), VP8, VP9, AV1, and ProRes. Supports both length-prefixed and Annex B AVC/HEVC as well as transparent video via VP9 and ProRes.
- Audio decoders and encoders for AAC, MP3, Vorbis, Opus, FLAC, AC-3 and E-AC-3. Supports AAC in both AAC and ADTS formats.
- Audio decoders and encoders for AAC, MP3, Vorbis, Opus, FLAC, AC-3, E-AC-3 and DTS. Supports AAC in both AAC and ADTS formats.
- Video frame transformation support (resize, rotate, crop)
- Automatic hardware acceleration on all platforms (macOS, Linux, Windows)
- Built-in multithreading
docs/guide/introduction.md
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@@ -64,7 +64,7 @@ Mediabunny's simple yet flexible API provides a modern alternative to traditiona
The extension enables:
- Video decoders and encoders for AVC (H.264), HEVC (H.265), VP8, VP9, and AV1. Supports both length-prefixed and Annex B AVC/HEVC as well as transparent video via VP9.
- Audio decoders and encoders for AAC, MP3, Vorbis, Opus, FLAC, AC-3 and E-AC-3. Supports AAC in both AAC and ADTS formats.
- Audio decoders and encoders for AAC, MP3, Vorbis, Opus, FLAC, AC-3, E-AC-3 and DTS. Supports AAC in both AAC and ADTS formats.
- Video frame transformation support (resize, rotate, crop)
- Automatic hardware acceleration on all platforms (macOS, Linux, Windows)
- Built-in multithreading
docs/guide/supported-formats-and-codecs.md
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@@ -51,6 +51,7 @@ Mediabunny ships with built-in decoders and encoders for all audio PCM codecs, m
- `'flac'` - Free Lossless Audio Codec (FLAC) [^flac]
- `'ac3'` - Dolby Digital (AC-3) [^ac3]
- `'eac3'` - Dolby Digital Plus (E-AC-3) [^ac3]
- `'dts'` - DTS Coherent Acoustics [^dts]
- `'pcm-u8'` - 8-bit unsigned PCM
- `'pcm-s8'` - 8-bit signed PCM
- `'pcm-s16'` - 16-bit little-endian signed PCM
@@ -89,6 +90,7 @@ Not all codecs can be used with all containers. The following table specifies th
| `'flac'` | ✓ | ✓ | ✓ | | | | | | ✓ | |
| `'ac3'` | ✓ | ✓ | ✓ | | | | | | | ✓ |
| `'eac3'` | ✓ | ✓ | ✓ | | | | | | | ✓ |
| `'dts'` | ✓ | ✓ | ✓ | | | | | | | ✓ |
| `'pcm-u8'` | | ✓ | ✓ | | | | ✓ | | | |
| `'pcm-s8'` | | ✓ | | | | | | | | |
| `'pcm-s16'` | ✓ | ✓ | ✓ | | | | ✓ | | | |
@@ -112,6 +114,7 @@ For HLS, the supported codecs depend on the segment format chosen.
[^mp3]: MP3 encoding is not supported by WebCodecs. You can polyfill it with the [`@mediabunny/mp3-encoder`](./extensions/mp3-encoder) extension package.
[^flac]: FLAC encoding is not supported by WebCodecs. You can polyfill it with the [`@mediabunny/flac-encoder`](./extensions/flac-encoder) extension package.
[^ac3]: AC-3 and E-AC-3 are not natively supported by WebCodecs. To encode or decode these codecs, you can use the [`@mediabunny/ac3`](./extensions/ac3) extension package.
[^dts]: DTS is not supported by WebCodecs. The [`@mediabunny/server`](./extensions/server) extension package provides both decoding and encoding support for server-side environments.
[^webm]: WebM only supports a small subset of the codecs supported by Matroska. However, this library can technically read all codecs from a WebM that are supported by Matroska.
[^webvtt]: WebVTT can only be written, not read.
@@ -127,7 +130,7 @@ import { canEncode } from 'mediabunny';
canEncode('avc'); // => Promise<boolean>
canEncode('opus'); // => Promise<boolean>
```
Video codecs are checked using 1280x720 @1Mbps, while audio codecs are checked using 2 channels, 48 kHz @128kbps.
Video codecs are checked using 1280x720, while audio codecs are checked using 2 channels at 48 kHz.
You can also check encodability using specific configurations:
```ts