使用从AVRURLAsset从相机胶卷保存的视频 - initWithURL - iPhone

Question

我有以下代码，它保存从相机胶卷中选择的UIImage或视频。

NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType]; 

[self dismissModalViewControllerAnimated:YES]; 

if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) { 
    introImage = [info objectForKey:UIImagePickerControllerOriginalImage]; 

    //Unhide our UIImage Preview and insert our chosen Video or Intro. 
    selectIntroButton.hidden = YES; 
    selectedIntro.hidden = NO; 
    cancelIntroChoiceButton.hidden = NO; 
    selectedIntro.image = introImage; 
} 
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) 
{ 

    //Create variable for video. 

    AVURLAsset *asset=[[AVURLAsset alloc] initWithURL:??? options:nil]; 
    AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset]; 
    generator.appliesPreferredTrackTransform=TRUE; 
    [asset release]; 
    CMTime thumbTime = CMTimeMakeWithSeconds(0,30); 

我的问题是如何将所选视频提供给AVURLAssset initWithURL？什么类型的对象是[info objectForKey：UIImagePickerControllerOriginalImage]返回？

谢谢。

Answer 1

您可以通过UIImagePickerControllerReferenceURL键获取资产的URL。

[[AVURLAsset alloc] initWithURL:[info objectForKey:UIImagePickerControllerReferenceURL]]