The MediaTrackConstraints
dictionary's channelCount
property is a ConstrainULong
describing the requested or mandatory constraints placed upon the value of the channelCount
constrainable property.
If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.channelCount
as returned by a call to MediaDevices.getSupportedConstraints()
. However, typically this is unnecessary since browsers will ignore any constraints they're unfamiliar with.