MPMoviePlayerViewController產生很多錯誤

Question

我在讓MPMoviePlayerViewController工作時遇到問題。 我有一個新項目，在viewDidLoad之后，我嘗試如下在moviePlayerViewController中播放電影。 我把電影放了放，得到了很多錯誤消息，如下所示。 有人可以解釋我做錯了什么以獲得這些錯誤嗎

- (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];
}

錯誤訊息

Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] <Error>: CGContextSaveGState: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] <Error>: CGContextClipToRect: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] <Error>: CGContextTranslateCTM: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] <Error>: CGContextDrawShading: invalid context 0x0
Jan  8 21:19:28 rezas-macbook.home MoviePlayer[30320] <Error>: 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 <MPMoviePlayerViewController: 0x916ec10> on <ViewController: 0x916c9c0> 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

Answer 1

我也在使用MPMoviePlayerViewController在我的App之一中播放實時視頻，我也

遇到這些錯誤，但除了這些錯誤外，我的視頻在此播放器上的播放效果還不錯。

我認為沒有解決方案。 如果您的視頻運行正常，請忽略這些警告

或錯誤。

Answer 2

（1）要解決CGContextSaveGState ，請將您的alloc-init包裝在偽造的圖形上下文中，如我在此處解釋的那樣：

iphone MPMoviePlayerViewController CGContext錯誤

（2）其他消息無害，現在可以在iOS 6.1上解決。 它們不再出現。

Answer 3

我還使用MPMoviePlayerViewController在我的應用程序上直播視頻並出現上面列出的錯誤。我發現MPMoviePlayer不支持較大的數據來顯示視頻，但是如果您使用較小的視頻數據可以正常工作，則不會出現任何錯誤。 實際上不是准備播放和播放電影播放器​​屬性的問題。

如果您需要顯示更大的數據，請在應用程序上使用webview。