Used to get and set the currently used input source for the device. Some devices can capture data from one of multiple input sources (different input jacks on the same audio device, for example). The value is an object returned by the QTCaptureDeviceInputSourceIdentifierKey key in one of the dictionaries returned by QTCaptureDeviceAvailableInputSourcesAttribute. This string value can be used in key paths for key value coding, key value observing, and bindings.
Available in Mac OS X v10.5 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)