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The input to the decoding capabilities is represented by a MediaDecodingConfiguration dictionary.
https://w3c.github.io/media-capabilities/#dictdef-mediadecodingconfiguration

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Extends

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Properties

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audio

audio: AudioConfiguration The audio configuration to be used. https://w3c.github.io/media-capabilities/#dom-mediaconfiguration-audio

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Inherited from

MediaConfiguration.audio

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keySystemConfiguration?

optional keySystemConfiguration: MediaCapabilitiesKeySystemConfiguration For a MediaDecodingConfiguration to describe ENCRYPTED-MEDIA, a keySystemConfiguration MUST exist. https://www.w3.org/TR/media-capabilities/#dom-mediadecodingconfiguration-keysystemconfiguration
Last modified on February 25, 2026