Interface MediaTrackConstraints

interface MediaTrackConstraints {
    advanced?: MediaTrackConstraintSet[];
    aspectRatio?: ConstrainDouble;
    autoGainControl?: ConstrainBoolean;
    backgroundBlur?: ConstrainBoolean;
    channelCount?: ConstrainULong;
    deviceId?: ConstrainDOMString;
    displaySurface?: ConstrainDOMString;
    echoCancellation?: ConstrainBoolean;
    facingMode?: ConstrainDOMString;
    frameRate?: ConstrainDouble;
    groupId?: ConstrainDOMString;
    height?: ConstrainULong;
    noiseSuppression?: ConstrainBoolean;
    sampleRate?: ConstrainULong;
    sampleSize?: ConstrainULong;
    width?: ConstrainULong;
}