title: How to mute mic while Recording using UIImagePickerController?
body: <p>I am using UIImagePickerController for recording video in one of my application. i have successfully Recorded video. But now i want to mute mic (video without audio) while recording video.
  i have searched Alot but not a single clue about it.
  please help me about this issue.
  is it possible or not. if possible than how.
  thanks in advance.</p>