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VideoEncoder

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The VideoEncoder interface of the WebCodecs API encodes VideoFrame objects into EncodedVideoChunks.

Constructor

VideoEncoder(): Creates a new VideoEncoder object.

Instance properties

Inherits properties from its parent, EventTarget.

VideoEncoder.encodeQueueSize Read only: An integer representing the number of encode queue requests.
VideoEncoder.state Read only: Represents the state of the underlying codec and whether it is configured for encoding.

Static methods

VideoEncoder.isConfigSupported(): Returns a promise indicating whether the provided VideoEncoderConfig is supported.

Instance methods

Inherits methods from its parent, EventTarget.

VideoEncoder.configure(): Asynchronously prepares the encoder to accept video frames for encoding with the specified parameters.
VideoEncoder.encode(): Asynchronously encodes a VideoFrame.
VideoEncoder.flush(): Returns a promise that resolves once all pending encodes have been completed.
VideoEncoder.reset(): Cancels all pending encodes and callbacks.
VideoEncoder.close(): Ends all pending work and releases system resources.

Events

dequeue: Fires to signal a decrease in VideoEncoder.encodeQueueSize.

Specifications

Specification
WebCodecs # videoencoder-interface

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This page was last modified on Nov 10, 2026 by MDN contributors.

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