MediaTrackConstraints: autoGainControl property

The MediaTrackConstraints dictionary's autoGainControl property is a ConstrainBoolean describing the requested or mandatory constraints placed upon the value of the autoGainControl constrainable property.

If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.autoGainControl as returned by a call to MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will ignore any constraints they're unfamiliar with.

Automatic gain control is typically a feature provided by microphones, although it can be provided by other input sources as well.

Value

If this value is a simple true or false, the user agent will attempt to obtain media with automatic gain control enabled or disabled as specified, if possible, but will not fail if this can't be done. If, instead, the value is given as an object with an exact field, that field's Boolean value indicates a required setting for the automatic gain control feature; if it can't be met, then the request will result in an error.

Examples

See the Constraint exerciser example.

Specifications

Specification
Media Capture and Streams
# dom-mediatrackconstraintset-autogaincontrol

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
autoGainControl constraint

Legend

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Full support
Full support
No support
No support
Requires a vendor prefix or different name for use.
Has more compatibility info.

See also