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VideoDecoder

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 VideoDecoder interface of the WebCodecs API decodes chunks of video.

EventTarget VideoDecoder

In this article

Constructor

VideoDecoder()

Creates a new VideoDecoder object.

Instance properties

Inherits properties from its parent, EventTarget.

VideoDecoder.decodeQueueSize Read only

An integer representing the number of queued decode requests.

VideoDecoder.state Read only

Indicates the current state of decoder. Possible values are:

  • "unconfigured"
  • "configured"
  • "closed"

Events

dequeue

Fires to signal a decrease in VideoDecoder.decodeQueueSize.

Static methods

VideoDecoder.isConfigSupported()

Returns a promise indicating whether the provided VideoDecoderConfig is supported.

Instance methods

Inherits methods from its parent, EventTarget.

VideoDecoder.configure()

Enqueues a control message to configure the video decoder for decoding chunks.

VideoDecoder.decode()

Enqueues a control message to decode a given chunk of video.

VideoDecoder.flush()

Returns a promise that resolves once all pending messages in the queue have been completed.

VideoDecoder.reset()

Resets all states including configuration, control messages in the control message queue, and all pending callbacks.

VideoDecoder.close()

Ends all pending work and releases system resources.

Specifications

Specification
WebCodecs
# videodecoder-interface

Browser compatibility

Enable JavaScript to view this browser compatibility table.

See also

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This page was last modified on May 8, 2024 by MDN contributors.

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  1. WebCodecs API
  2. VideoDecoder
  3. Constructor
    1. VideoDecoder()
  4. Instance properties
    1. decodeQueueSize
    2. state
  5. Static methods
    1. isConfigSupported()
  6. Instance methods
    1. close()
    2. configure()
    3. decode()
    4. flush()
    5. reset()
  7. Events
    1. dequeue
  8. Inheritance
    1. EventTarget
  9. Related pages for WebCodecs API
    1. AudioData
    2. AudioDecoder
    3. AudioEncoder
    4. EncodedAudioChunk
    5. EncodedVideoChunk
    6. ImageDecoder
    7. ImageTrack
    8. ImageTrackList
    9. VideoColorSpace
    10. VideoEncoder
    11. VideoFrame
  10. Guides
    1. Video processing concepts
    2. Using the WebCodecs API
    3. Codec selection

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