Getting a screenshot with AVAssetImageGenerator

AVAssetImageGenScreenShot.m

- (UIImage *)screenshotFromFileURL:(NSURL *)url {
    AVPlayerItem *item = [AVPlayerItem playerItemWithURL:url];

    AVURLAsset *asset = (AVURLAsset *)item.asset;
    AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] 
                                                      initWithAsset:asset];
    CGImageRef thumb = [imageGenerator 
                         copyCGImageAtTime:CMTimeMakeWithSeconds(10.0, 1.0)
                                actualTime:NULL
                                     error:NULL];
    UIImage *image = [UIImage imageWithCGImage:thumb];

    return image;
}