Declaration
init(device: AVCaptureDevice!) throws
Parameters
device
The device from which to capture input.
outError
If an error occurs during initialization, upon return contains an NSError object describing the problem.

Declaration
- (instancetype)initWithDevice:(AVCaptureDevice *)device
                     error:(NSError **)outError;
Parameters
device
The device from which to capture input.
outError
If an error occurs during initialization, upon return contains an NSError object     describing the problem.
Return Value
An input initialized to use device.