iphone – 带摄像头源的UIImagePickerController允许编辑是：视频修剪不起作用

我已将allowEdiTing设置为true.

在捕获视频后,我使用修剪界面编辑视频并按“使用”,我只返回原始记录而不是修剪版本.我究竟做错了什么？

我正在使用iOS 5.

-(void)shootvideo {
    imagePicker = [[UIImagePickerController alloc] init];
    [imagePicker.view addSubview:test];
    [imagePicker.view addSubview:test2];

    imagePicker.delegate = self;
    imagePicker.sourCEType =  UIImagePickerControllersourceTypeCamera;

    imagePicker.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie,nil];
    imagePicker.showsCameraControls = YES;
    imagePicker.navigationBarHidden = NO;
    imagePicker.toolbarHidden = NO;
    imagePicker.wantsFullScreenLayout = YES;
    imagePicker.allowsEdiTing=YES;

    [self presentModalViewController:imagePicker animated:YES];
}


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


    if (CFStringCompare ((__bridge CFStringRef) mediaType,kUTTypeMovie,0)
        == kcfCompareEqualTo) 
    {

        NSString *moviePath = [[info objectForKey:UIImagePickerControllerMediaURL] path];

        //NSLog(@"%@",moviePath);

        if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum (moviePath)) {
            UISaveVideoAtPathToSavedPhotosAlbum (moviePath,nil,nil);
        }
    }

    [self dismissModalViewControllerAnimated:YES];  
}

我想根据我的应用程序使用修剪过的视频进行进一步处理.

我哪里错了？

有没有其他方法可以完成这项任务？