title: How to record mp4 file using AVCaptureSession?
body: <p>I am  recording <code>.mov</code> using <code>AVCaptureMovieFileOutput</code> with <code>AVCaptureSession</code>. I want to record <code>.mp4</code> file, i guess it is not possible with <code>AVCaptureMovieFileOutput</code>, Any idea how to record <code>.mp4</code> file?</p>
  
  <p>Edit:
  I have googled and found, there is a way <code>AVAssetWriter</code>, however it is not simple as <code>AVCaptureMovieFileOutput</code>?</p>
  
  <p>thanks</p>