Play a video full screen in objective c

- (void) playVideo:(NSString *)fileName
{
    NSString *url = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:fileName];
 
    playerViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL fileURLWithPath:url]];
 
    [[NSNotificationCenter defaultCenter] 
	 addObserver:self
	 selector:@selector(movieFinishedCallback:)
	 name:MPMoviePlayerPlaybackDidFinishNotification
	 object:[playerViewController moviePlayer]];
 
    [self.view addSubview:playerViewController.view];
 
    //play movie
 
    MPMoviePlayerController *player = [playerViewController moviePlayer];
    [player play];	    
}
 
// The call back
- (void) movieFinishedCallback:(NSNotification*) aNotification {
    MPMoviePlayerController *player = [aNotification object];
    [[NSNotificationCenter defaultCenter] 
	 removeObserver:self
	 name:MPMoviePlayerPlaybackDidFinishNotification
	 object:player];
 
    //player.initialPlaybackTime = -1;
    //[player pause];
    [player stop];
 
	[player.view removeFromSuperview];    
 
    [player release];    
    // call autorelease the analyzer says call too many times
    // call release the analyzer says incorrect decrement
}