No audio on iPad with MPMoviePlayerViewController and iOS5, works in the simulator

Question

Ever since I updated to iOS 5, I can't get MPMoviePlayerViewController to play audio on the iPad. Video is perfect, but no audio is heard. It doesn't matter what format I use. It does not work. It works in the simulator, but not on the iPad.

- (IBAction)playVideo {

    NSString *filepath   =   [[NSBundle mainBundle] pathForResource:@"test" ofType:@"m4v"];
    NSURL    *fileURL    =   [NSURL fileURLWithPath:filepath];
    moviePlayer = [[MPMoviePlayerViewController alloc] initWithContentURL:fileURL];

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

    [self presentMoviePlayerViewControllerAnimated:moviePlayer];

}

Anyone else have this problem? Or found a fix?

Answer 1

It sounds silly, but we came across an issue on my team where the volume control for general iPad sounds was muted and this meant that there was no sound for video played in our app, even though music played through the music player or video on websites worked fine.

To check this volume control you can bring up the task manager (double-tap the home button) and then swipe across to the far left and there are some music controls; check that the mute button on this screen is not on.

Answer 2

try this:

...
moviePlayer.useApplicationAudioSession = NO;
[self presentMoviePlayerViewControllerAnimated:moviePlayer];