VideoDecoder: decode() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is available in Dedicated Web Workers.
The decode() method of the VideoDecoder interface enqueues a control message to decode a given chunk of video.
Syntax
decode(chunk)
Parameters
chunk-
An
EncodedVideoChunkobject representing a chunk of encoded video.
Return value
None (undefined).
Exceptions
InvalidStateErrorDOMException-
Thrown if the
stateis notconfigured. DataErrorDOMException-
Thrown if the
chunkis unable to be decoded due to relying on other frames for decoding.
Examples
The following example demonstrates how to use the decode() method to decode EncodedVideoChunk objects created from encoded video data.
const responses = await downloadVideoChunksFromServer(timestamp);
for (const response of responses) {
const chunk = new EncodedVideoChunk({
timestamp: response.timestamp,
type: response.key ? "key" : "delta",
data: new Uint8Array(response.body),
});
decoder.decode(chunk);
}
Specifications
| Specification |
|---|
| WebCodecs # dom-videodecoder-decode |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
decode
|
|
|
|
|
|
|
|
|
|
|
|
|
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- No support
- No support