У меня есть проблемы, чтобы заставить MPMoviePlayerViewController работать. У меня есть новый проект, который после viewDidLoad я пытаюсь воспроизвести фильм в moviePlayerViewController, как показано ниже. Я получаю фильм для воспроизведения, я получаю множество сообщений об ошибках, как показано ниже. Может кто-нибудь объяснить, что я делаю неправильно, чтобы получить эти ошибки

- (void)viewDidLoad
{
    [super viewDidLoad];
    [ self play ];
}

- (void) play {
    NSURL *filmURL = [ NSURL URLWithString:@"http://www.ud-ltd.com/ipmt/Film16.mp4" ];
    self.mvc = [[MPMoviePlayerViewController alloc] initWithContentURL:filmURL ];
    [ self presentMoviePlayerViewControllerAnimated:self.mvc ];
    [ self.view addSubview:self.mvc.view ];
    [ self.mvc.moviePlayer play];
}

Сообщения об ошибках

Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] : CGContextSaveGState: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] : CGContextClipToRect: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] : CGContextTranslateCTM: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] : CGContextDrawShading: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] : CGContextRestoreGState: invalid context 0x0
2013-01-08 21:19:28.526 MoviePlayer[30320:c07] [MPAVController] Autoplay: Disabling autoplay for pause
2013-01-08 21:19:28.527 MoviePlayer[30320:c07] [MPAVController] Autoplay: Disabling autoplay
2013-01-08 21:19:28.528 MoviePlayer[30320:c07] Warning: Attempt to present  on  whose view is not in the window hierarchy!
2013-01-08 21:19:28.536 MoviePlayer[30320:c07] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)
2013-01-08 21:19:29.864 MoviePlayer[30320:c07] [MPAVController] Autoplay: Enabling autoplay
2013-01-08 21:19:29.868 MoviePlayer[30320:c07] [MPAVController] Autoplay: Likely to keep up or full buffer: 0
2013-01-08 21:19:29.868 MoviePlayer[30320:c07] [MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up.
2013-01-08 21:19:29.870 MoviePlayer[30320:c07] [MPAVController] Autoplay: Enabling autoplay
2013-01-08 21:19:29.871 MoviePlayer[30320:c07] [MPCloudAssetDownloadController] Prioritization requested for media item ID: 0
2013-01-08 21:19:30.964 MoviePlayer[30320:c07] [MPAVController] Autoplay: Likely to keep up or full buffer: 0
2013-01-08 21:19:30.964 MoviePlayer[30320:c07] [MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up.
2013-01-08 21:19:31.494 MoviePlayer[30320:c07] [MPAVController] Autoplay: _streamLikelyToKeepUp: 0 -> 1
2013-01-08 21:19:31.495 MoviePlayer[30320:c07] [MPAVController] Autoplay: Likely to keep up or full buffer: 1
2013-01-08 21:19:31.495 MoviePlayer[30320:c07] [MPAVController] Autoplay: Enabling autoplay