使用GMImagePickerController播放视频时出现黑屏

Question

- (void)assetsPickerController:(GMImagePickerController *)picker didSelectAsset:(PHAsset *)asset{

self.videoURL = [NSURL URLWithString:asset.localIdentifier];

NSLog(@"The value of URL is %@:",self.videoURL);

[self playVideo];

[picker.presentingViewController dismissViewControllerAnimated:YES completion:nil];
}

- (void)playVideo{

self.playerVC = [[MPMoviePlayerViewController alloc] init];

self.playerVC.moviePlayer.contentURL = self.videoURL;
self.playerVC.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
[self.playerVC.moviePlayer.view setFrame:CGRectMake (0, 100, 320, 385)];
[self.view addSubview:self.playerVC.moviePlayer.view];

[self.playerVC.moviePlayer play];
}

从相机胶卷中选择视频后，我打算在应用上播放，但会出现黑屏，如下所示：

我的代码出了什么问题？谢谢！

Answer 1

此处MPMoviePlayerViewController无法获取您的视频网址。您应该检查视频网址是否可用。 在这里，您将获得后台线程中的视频网址

[asset requestContentEditingInputWithOptions:kNilOptions completionHandler: ^(PHContentEditingInput *contentEditingInput, NSDictionary *info) { self.videoURL = contentEditingInput.fullSizeImageURL; }];

直到获得视频网址，MPMoviePlayerViewController代码才会被执行。

要首先解决此问题，您应该获取视频网址，如果网址可用，请调用MPMoviePlayerViewController代码播放视频。