OptionalaudioURL of an audio file played when a keyframe is extracted. Keyframes are extracted silently while not set
OptionalcallbackInvoked with the keyframe extracted at the playhead. The capability is inactive while not set. The keyframe's src is
an object URL that the callback function owns, and can release with URL.revokeObjectURL once it's no longer needed.
OptionalkeyframeOptions of the extracted keyframes, e.g. their image format
Configuration of the keyframe capability