MPMoviePlayerController不播放从UIImagePickerController拾取的电影 [英] MPMoviePlayerController do not play movie picked from UIImagePickerController

问题描述

我有奇怪的MPMoviePlayerController行为.它不想播放仅从UIImagePickerController的相机胶卷"中选择的电影.但是，当我使用UIImagePickerController捕获电影时-有时可以在MPMoviePlayerController中正常播放.

I have strange MPMoviePlayerController behavior. It don't want to play movies just chosen from UIImagePickerController's Camera Roll. But when I capture movie with UIImagePickerController - sometimes it plays in MPMoviePlayerController fine.

这是UIImagePickerController初始化:

This is UIImagePickerController initialization:

mediaPickerController = [[[UIImagePickerController alloc] init] autorelease];
NSArray *types = [UIImagePickerController availableMediaTypesForSourceType:sourceType];
mediaPickerController.sourceType = sourceType;
mediaPickerController.mediaTypes = types;
mediaPickerController.videoQuality = qualityType;
mediaPickerController.delegate = self;
[self presentModalViewController:mediaPickerController animated:YES];   

这是-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 委托方法:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSURL *fileURL = [info objectForKey:UIImagePickerControllerMediaURL];
    playerView = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];
    [playerView.view setFrame:mediaPreview.bounds];
    [playerView setScalingMode:MPMovieScalingModeAspectFit];
    [playerView setControlStyle:MPMovieControlStyleEmbedded];
    [playerView setShouldAutoplay:NO];
    [playerView prepareToPlay];
    [mediaPreview addSubview:playerView.view];
}

另一个奇怪的问题-当我使用UIImagePickerController的sourceType = Camera时，委托返回下一个路径并正常播放:

Another strange issue - when I use UIImagePickerController's sourceType = Camera, then delegate return next path and plays fine:

UIImagePickerControllerMediaURL = "file://localhost/private/var/mobile/Applications/XXXXX-XXXXX/tmp/capture-T0x127bb0.tmp.5gFkOo/capturedvideo.MOV"

但是当sourceType = Library时，路径看起来不正确，电影会在半秒钟后出现并消失:

but when sourceType = Library, path looks incorrect and movie appears at half second and disappears:

UIImagePickerControllerMediaURL = "file://localhost/private/var/mobile/Applications/XXXXX-XXXXX/tmp//trim.ZPeyTU.MOV"

有什么想法吗?

推荐答案

问题非常明显.释放媒体选择器后，较旧的iPhone设备也会尝试删除保存的文件.因此，为了正确使用它，我之前将其复制到了Documents文件夹(例如)，然后将视频设置为电影播放器​​. 4.3之后的设备没有这个问题.

The issue is pretty non obvious. The older iPhone devices after releasing of media picker tries to delete saved file also. So to use it properly I copy it to Documents folder (for example) before and then set video to movie player. Devices after 4.3 hasn't this problem.

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