MPMoviePlayerController doesn't play local Videos

I am trying to play a video by MPMoviePlayerController in iOS 6.0 by two methods.

Right after camera captures it and
From Camera Roll

Here is the snippet for it.

-(void) playMovie
{
  self.moviePlayer = [[MPMoviePlayerController alloc] init];
  [self.moviePlayer prepareToPlay];
  [self.moviePlayer setContentURL:self.movieURL];
  self.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
  [self.moviePlayer.view setFrame:CGRectMake ( 0, 0, 320, 476)];

  [self.view addSubview:self.moviePlayer.view];

  [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlayBackDidFinish:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:self.moviePlayer];

  [self.moviePlayer play];
}

I tried taking the property moviePlayer as both strong and retain but no use. My problem is very much similar to this Question, that the video stops within one second. However if you are playing a video which is over internet it works fine.

Here is the Git Source Code for What I have tried

Solution

I found the issue with this.

I am using this for iPad hence I use a UIPopoverController to select video from library and after selection is done I dismiss the popover in didFinishPickingMediaWithInfo and call the function playMovie (written above)

The problem here was if dismiss popover the moviePlayer is also removed.

Though I didn't get why this happened, I wrote a work around for this by saving the URL path globally and adding an additional play button to start the movie after dismissing the popover. The complete code is here