VideoDecoder: isConfigSupported() static 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 isConfigSupported() static method of the VideoDecoder interface checks if the given config is supported (that is, if VideoDecoder objects can be successfully configured with the given config).

Syntax

VideoDecoder.isConfigSupported(config)

Parameters

config

The dictionary object accepted by VideoDecoder.configure

Return value

A Promise that resolves with an object containing the following members:

supported

A boolean value which is true if the given config is supported by the decoder.

config

A copy of the given config with all the fields recognized by the decoder.

Exceptions

TypeError

Thrown if the provided config is invalid; that is, if doesn't have required values (such as an empty codec field) or has invalid values (such as a negative codedWidth).

Examples

The following example tests if the browser supports accelerated and un-accelerated versions of several video codecs.

js
const codecs = [
  "avc1.42001E",
  "hvc1.1.6.L123.00",
  "vp8",
  "vp09.00.10.08",
  "av01.0.04M.08",
];
const accelerations = ["prefer-hardware", "prefer-software"];

const configs = [];
for (const codec of codecs) {
  for (const acceleration of accelerations) {
    configs.push({
      codec,
      hardwareAcceleration: acceleration,
      codedWidth: 1280,
      codedHeight: 720,
      not_supported_field: 123,
    });
  }
}

for (const config of configs) {
  const support = await VideoDecoder.isConfigSupported(config);
  console.log(
    `VideoDecoder's config ${JSON.stringify(support.config)} support: ${
      support.supported
    }`,
  );
}