jerk while paying a video - MPMoviePlayerController - iphone

Question

I have used a MPMoviePlayerController object to play a movie in my app but as soon as I call [moviePlayer play] in a function there is a small jerk and then the movie starts playing.
Edit:
This is the code that I am using.
NSString *urlStr = [[NSBundle mainBundle] pathForResource:sVideoName ofType:nil];
NSURL *movieURL = [NSURL fileURLWithPath:urlStr];
moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
moviePlayer.view.frame = CGRectMake(lowerScroll.frame.size.width *(((AppDelegate *)[UIApplication sharedApplication].delegate).currentPage-1), 0.0,1024.0,lowerScroll.frame.size.height);
moviePlayer.controlStyle = MPMovieControlStyleNone;
moviePlayer.scalingMode = MPMovieScalingModeFill;
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];
moviePlayer.view.backgroundColor = [UIColor clearColor];
moviePlayer.view.alpha = 0;
[lowerScroll addSubview:moviePlayer.view];
[moviePlayer prepareToPlay];
[self performSelector:#selector(showMovie) withObject:nil afterDelay:0.3];
- (void)showMovie {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.2];
[moviePlayer play];
moviePlayer.view.alpha = 1;
[UIView commitAnimations];
}
- (void)movieFinishedCallback:(NSNotification*)notification {
[[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];
if (moviePlayer) {
[moviePlayer stop];
[moviePlayer.view removeFromSuperview];
[moviePlayer release];
moviePlayer = nil;
}
}
Could anybody please tell what could be the reason for the same and how to remove that jerk.
Thanx in advance.