[Freeswitch-users] Detecting silence in recorded file

Hi there, Is there way to do any the following when using the record dial plan tool? - prevent the record tool from writing any samples to the destination file if the audio is not above the given silence threshold - detect whether a recorded file contains any audio above the given silence threshold I would like to treat recordings that are purely "silence" differently from those that contain audio above the silence threshold (such as speech). I would be interested in knowing if anyone has ever done this, and what your approach was. Thanks, Adam