EncodedVideoChunk: EncodedVideoChunk() constructor

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Note: This feature is available in Dedicated Web Workers.

The EncodedVideoChunk() constructor creates a new EncodedVideoChunk object representing a chunk of encoded video.

Syntax

js
new EncodedVideoChunk(options)

Parameters

options

An object containing the following members:

type

Indicates if the chunk is a key chunk that does not rely on other frames for encoding. One of:

"key"

The data is a key chunk.

"delta"

The data is not a key chunk.

timestamp

An integer representing the timestamp of the video in microseconds.

duration

An integer representing the length of the video in microseconds.

data

An ArrayBuffer, a TypedArray, or a DataView containing the video data.

transfer

An array of ArrayBuffers that EncodedVideoChunk will detach and take ownership of. If the array contains the ArrayBuffer backing data, EncodedVideoChunk will use that buffer directly instead of copying from it.

Examples

In the following example a new EncodedVideoChunk is created.

js
const init = {
  type: "key",
  data: videoBuffer,
  timestamp: 23000000,
  duration: 2000000,
  transfer: [videoBuffer],
};
chunk = new EncodedVideoChunk(init);

Specifications

Specification
WebCodecs
# dom-encodedvideochunk-encodedvideochunk

Browser compatibility

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