无法在MPMoviePlayer中播放视频

Question

我需要使用"MPMoviePlayerViewController“播放视频当我从库中挑选一个视频并将其URL传递给播放器时，它播放了大约2秒并停止响应(根本没有交互)，并在控制台中找到了这些行

[MPAVController] Autoplay: Enabling autoplay
[MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 0, on player: 1)
[MPAVController] Autoplay: Enabling autoplay
[MPCloudAssetDownloadController] Prioritization requested for media item ID: 0
[MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 0, on player: 1)
[MPAVController] Autoplay: _streamLikelyToKeepUp: 0 -> 1
[MPAVController] Autoplay: Disabling autoplay for pause
[MPAVController] Autoplay: Disabling autoplay
[MPAVController] Autoplay: Disabling autoplay for pause
[MPAVController] Autoplay: Disabling autoplay
[MPAVController] Autoplay: Disabling autoplay for pause
[MPAVController] Autoplay: Disabling autoplay
[MPAVController] Autoplay: Disabling autoplay
[MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)
[MPAVController] Autoplay: Enabling autoplay
[MPAVController] Autoplay: Likely to keep up or full buffer: 0
[MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up.
[MPCloudAssetDownloadController] Prioritization requested for media item ID: 0
[MPAVController] Autoplay: Likely to keep up or full buffer: 1
[MPAVController] Autoplay: Enabling autoplay
[MPAVController] Autoplay: _streamLikelyToKeepUp: 0 -> 1
[MPAVController] Autoplay: Enabling autoplay
[MPAVController] Autoplay: Likely to keep up or full buffer: 0
[MPAVController] Autoplay: Skipping autoplay, not enough buffered to keep up.
[MPAVController] Autoplay: Enabling autoplay
[MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 0, on player: 1)
[MPAVController] Autoplay: Enabling autoplay
[MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 0, on player: 1)

我已经尝试了在"stackoverflow“中找到的所有东西，但都没有用，能不能请任何人给我建议解决方案。

设备: iPad-3，版本: 6.1

请给出建议

下面是我在播放视频时使用的代码

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSString* mediaType = [info objectForKey:UIImagePickerControllerMediaType];

    if([mediaType isEqualToString:(NSString*)kUTTypeMovie])
    {
        [self playVideoWithURL:[info objectForKey:UIImagePickerControllerMediaURL]];
    }
}


- (void)playVideoWithURL:(NSURL*)fileURL
{
    if(!self.playerViewController)
    {
        self.playerViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:fileURL];
        [self.moviePlayerContainer addSubview:self.playerViewController.view];
        self.playerViewController.moviePlayer.scalingMode = MPMovieScalingModeNone;
        self.playerViewController.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
        [self.playerViewController.moviePlayer stop];
    }
    else
    {
        self.playerViewController.moviePlayer.contentURL = fileURL;
    }

    CGRect movieFrame = self.moviePlayerContainer.frame;
    movieFrame.origin = CGPointZero;
    self.playerViewController.view.frame = movieFrame;
}

Answer 1

发生这种情况的原因很简单，因为该电影不是本地存储的，而是试图通过iCloud逐步下载的。

您的网络带宽(通向iCloud)无法处理该视频，因为它的要求太高。

在没有日志的情况下，您会看到如下所示的行：

可能保持或已满缓冲区的：0

这就像是来自播放器的早期警告，告诉你它很可能加载数据的速度不足以进行流畅的回放。

另一个重要的部分是这一行

为媒体项目ID请求的 MPCloudAssetDownloadController优先级:0

这一条告诉你系统正在远程下载电影。它正在努力确保其他可能的并行下载应该等待这个下载，但显然这并没有释放足够的带宽(因为没有更多的可用带宽)。

恐怕你对此无能为力。

您需要先从iCloud下载该视频，否则您需要降低其质量(重新编码)。