title: iOS AVCaptureSession - How to get/set the number of frames per second recorded?
body: <p>I'm new to AVCaptureSession and wish to better understand how to work with it.
  So I managed capturing the video stream as separated CIImages and convert them to UIImages.
  Now I wish to be able to get the number of Frames Per Second captured and preferably to be able to set it.</p>
  
  <p>Any idea how to do that?</p>