video plays but no picture - just sound? - iphone

Question

Edit: if you come across this and want to know how I eventually solved it I gave up on that code below eventually and did this:
-(void)playMovieAtURL:(NSURL*)theURL{
mediaPlayer = [[MPMoviePlayerViewController alloc] initWithContentURL:theURL];
[self presentMoviePlayerViewControllerAnimated:mediaPlayer];
mediaPlayer.view.backgroundColor = [UIColor blackColor];
}
Original post:
This is my code - I took it off the apple site so shouldn't be a problem.
It runs in a UITableViewController on the didSelectRowAtIndexPath method.
When you select the row the video starts playing - the sound outputs at least - but there's no picture. Any idea why this is? I have included the framework.
The video is one off the apple website (a facetime video) that I used for testing.
-(void)playMovieAtURL:(NSURL*)theURL{
MPMoviePlayerController* theMovie =
[[MPMoviePlayerController alloc] initWithContentURL: theURL];
theMovie.scalingMode = MPMovieScalingModeAspectFill;
theMovie.controlStyle = MPMovieControlStyleNone;
// Register for the playback finished notification
[[NSNotificationCenter defaultCenter]
addObserver: self
selector: #selector(myMovieFinishedCallback:)
name: MPMoviePlayerPlaybackDidFinishNotification
object: theMovie];
// Movie playback is asynchronous, so this method returns immediately.
[theMovie play];
}

Answer 1

The behaviour of MPMoviePlayerController changed in OS 3.2 - you need to explicitly add the movie player's view to your view hierarchy now - using something like:
[aView addSubview:moviePlayerController.view];
moviePlayerController.view.frame = aView.frame;
Alternatively you can use an MPMoviePlayerViewController (new in 3.2) to manage the view.
If you're targetting both pre- and post-3.2 devices (e.g. iOS 3.1 and 4.0) then you'll need some conditional code to determine the OS the code is running on and handle accordingly. I've used this in previous projects:
if ([moviePlayerController respondsToSelector:#selector(setFullscreen:animated:)]) {
// Running on OS 3.2 or above
// Code to add to a view here...
}