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Update media sources docs

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Vanilagy
2025-04-05 16:58:51 +02:00
parent 97e2a9c1ba
commit 3f8a907c7f
2 changed files with 21 additions and 9 deletions
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docs/guide/media-sources.md
+16 -4
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@@ -53,22 +53,28 @@ type VideoEncodingConfig = {
bitrate: number | Quality;
latencyMode?: 'quality' | 'realtime';
keyFrameInterval?: number;
fullCodecString?: string;
onEncodedPacket?: (
packet: EncodedPacket,
meta: EncodedVideoChunkMetadata | undefined
) => unknown;
onEncodingError?: (
onEncoderError?: (
error: Error
) => unknown;
onEncoderConfig?: (
config: AudioEncoderConfig
) => unknown;
};
```
- `codec`: The [video codec](./supported-formats-and-codecs/#video-codecs) used for encoding.
- `bitrate`: The target number of bits per second. Alternatively, this can be a [subjective quality](#subjective-qualities).
- `latencyMode`: The latency mode as specified by the WebCodecs API. Media stream-driven video sources will automatically use the `realtime` setting.
- `keyFrameInterval`: The maximum interval in seconds between two adjacent key frames. Defaults to 5 seconds. More frequent key frames improve seeking behavior but increase file size. When using multiple video tracks, this value should be set to the same value for all tracks.
- `fullCodecString`: Allows you to optionally specify the full codec string used by the video encoder, as specified in the [WebCodecs API Codec Registry](https://www.w3.org/TR/webcodecs-codec-registry/). For example, you may set it to `'avc1.42001f'` when using AVC. Keep in mind that the codec string must still match the codec specified in `codec`. If you don't set this field, a codec string will be generated automatically.
- `onEncodedPacket`: Called for each successfully encoded packet. Useful for determining encoding progress.
- `onEncodingError`: Called when an error occurs during encoding.
- `onEncoderError`: Called when an error occurs within [VideoEncoder](https://developer.mozilla.org/en-US/docs/Web/API/VideoEncoder).
- `onEncoderConfig`: Called when the internal encoder config, as used by the WebCodecs API, is created. You can use this to introspect the full codec string.
### Audio encoding config
@@ -77,20 +83,26 @@ All audio sources that handle encoding internally require you to specify an `Aud
type AudioEncodingConfig = {
codec: AudioCodec;
bitrate?: number | Quality;
fullCodecString?: string;
onEncodedPacket?: (
packet: EncodedPacket,
meta: EncodedAudioChunkMetadata | undefined
) => unknown;
onEncodingError?: (
onEncoderError?: (
error: Error
) => unknown;
onEncoderConfig?: (
config: AudioEncoderConfig
) => unknown;
};
```
- `codec`: The [audio codec](./supported-formats-and-codecs/#audio-codecs) used for encoding. Can be omitted for uncompressed PCM codecs.
- `bitrate`: The target number of bits per second. Alternatively, this can be a [subjective quality](#subjective-qualities).
- `fullCodecString`: Allows you to optionally specify the full codec string used by the audio encoder, as specified in the [WebCodecs API Codec Registry](https://www.w3.org/TR/webcodecs-codec-registry/). For example, you may set it to `'mp4a.40.2'` when using AAC. Keep in mind that the codec string must still match the codec specified in `codec`. If you don't set this field, a codec string will be generated automatically.
- `onEncodedPacket`: Called for each successfully encoded packet. Useful for determining encoding progress.
- `onEncodingError`: Called when an error occurs during encoding.
- `onEncoderError`: Called when an error occurs within [AudioEncoder](https://developer.mozilla.org/en-US/docs/Web/API/AudioEncoder).
- `onEncoderConfig`: Called when the internal encoder config, as used by the WebCodecs API, is created. You can use this to introspect the full codec string.
### Subjective qualities
src/media-source.ts
+4 -4
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@@ -188,8 +188,8 @@ export type VideoEncodingConfig = {
*/
keyFrameInterval?: number;
/**
* The full codec string as specified in the WebCodecs API Codec Registry. When not specified, a fitting codec
* string will be constructed automatically by the library.
* The full codec string as specified in the WebCodecs API Codec Registry. This string must match the codec
* specified in `codec`. When not set, a fitting codec string will be constructed automatically by the library.
*/
fullCodecString?: string;
@@ -653,8 +653,8 @@ export type AudioEncodingConfig = {
*/
bitrate?: number | Quality;
/**
* The full codec string as specified in the WebCodecs API Codec Registry. When not specified, a fitting codec
* string will be constructed automatically by the library.
* The full codec string as specified in the WebCodecs API Codec Registry. This string must match the codec
* specified in `codec`. When not set, a fitting codec string will be constructed automatically by the library.
*/
fullCodecString?: string;