我正在尝试从Swift中的视频中提取UIImages帧。我找到了几个Objective C的解决方案,但是我很难在Swift中找到任何东西。如果以下做法正确,是否有人可以帮助我将其转换为Swift或者提供他们自己的方法?
来源:从UIImagePickerController中抓取视频的第一帧?
- (UIImage *)imageFromVideo:(NSURL *)videoURL atTime:(NSTimeInterval)time {
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoURL options:nil];
NSParameterAssert(asset);
AVAssetImageGenerator *assetIG =
[[AVAssetImageGenerator alloc] initWithAsset:asset];
assetIG.appliesPreferredTrackTransform = YES;
assetIG.apertureMode = AVAssetImageGeneratorApertureModeEncodedPixels;
CGImageRef thumbnailImageRef = NULL;
CFTimeInterval thumbnailImageTime = time;
NSError *igError = nil;
thumbnailImageRef =
[assetIG copyCGImageAtTime:CMTimeMake(thumbnailImageTime, 60)
actualTime:NULL
error:&igError];
if (!thumbnailImageRef)
NSLog(@"thumbnailImageGenerationError %@", igError );
UIImage *image = thumbnailImageRef
? [[UIImage alloc] initWithCGImage:thumbnailImageRef]
: nil;
return image;
}