automaticallyEnablesLowLightVideoNoiseReduction

Declaration

var automaticallyEnablesLowLightVideoNoiseReduction: Bool { get set }

Discussion

On a connection where isLowLightVideoNoiseReductionSupported is true, the system can enable low light video noise reduction to improve video quality at the cost of additional power. This property defaults to true for movie file output connections. When automaticallyEnablesLowLightVideoNoiseReduction is true, the connection sets isLowLightVideoNoiseReductionEnabled to true automatically when the session configuration is committed and the connection supports the feature. For AVCaptureMultiCamSession configurations with multiple movie file outputs, automatic enablement is suppressed because the feature can only be active on one output at a time; in that case, set this property to false and control isLowLightVideoNoiseReductionEnabled directly on the desired connection. Enabling the feature on more than one movie file output connection increases the session’s hardwareCost and may result in an AVCaptureSessionRuntimeErrorNotification. Setting this property on a connection that does not support low light video noise reduction is permitted but has no effect. Clients can key-value observe isLowLightVideoNoiseReductionEnabled to know when the connection has automatically changed the value.