iPhone Dev: MediaPlayer not playing video (only audio) on subsequent plays

Question

I am working on an iPhone application that uses a MediaPlayer to play a couple different videos. It works great for the first video but when I try to play another the screen stays black and only the audio plays. Does anyone have any idea why this might be happening?

Here is my code:

-(NSURL *)movieURL
{
    NSBundle *bundle = [NSBundle mainBundle];
    if (bundle) 
    {       
        NSString *moviePath = [bundle pathForResource:vidName ofType:@"mov"];
        if (moviePath)
            mMovieURL = [NSURL fileURLWithPath:moviePath];

        if (vidName == @"Vid01")
            vidName = @"Vid02";
        else if (vidName == @"Vid02")
            vidName = @"Vid03";
    }

    return mMovieURL;
}    

- (void)onHitButton1 {
        mMoviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[self movieURL]];
        mMoviePlayer.movieControlMode = MPMovieControlModeHidden;
        [mMoviePlayer play];
    }

Answer 1

I figured it out. I needed to release the MediaPlayer before calling the second video.

Code example:

- (void)onHitButton1 {
    [mMoviePlayer release];
    mMoviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[self movieURL]];
    mMoviePlayer.movieControlMode = MPMovieControlModeHidden;
    [mMoviePlayer play];
}