iOS获取视频的第一帧图片thumbnailImage

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iOS获取视频的第一帧图片thumbnailImage

获取视频的第一帧图片
有时候我们拍摄完视频后，希望获取一张图片当作这个视频的介绍，这个图片thumbnailImage可以从视频的第一帧获取到。

我们的思路是先获取视频的URL，然后初始化一个MPMoviePlayerController做工具，利用MPMoviePlayerController来拿图片，看具体代码如下：

- (void)imagePickerController:(UIImagePickerController *)picker   didFinishPickingMediaWithInfo:(NSDictionary *)info
{NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];if (CFStringCompare ((__bridge CFStringRef) mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo) {NSURL *videoUrl=(NSURL*)[info objectForKey:UIImagePickerControllerMediaURL];NSString *moviePath = [videoUrl path];这里利用MPMoviePlayerController来获取MPMoviePlayerController *player = [[MPMoviePlayerController alloc]initWithContentURL:videoUrl] ;UIImage  *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame];imageV.image = thumbnail;player = nil;//释放playerNSString *videoCacheDir = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches/UploadPhoto/"];if (![[NSFileManager defaultManager] fileExistsAtPath:videoCacheDir]) {[[NSFileManager defaultManager] createDirectoryAtPath:videoCacheDir withIntermediateDirectories:YES attributes:nil error:nil];}
}
[self dismissViewControllerAnimated:YES completion:nil];}

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