ios - AVPlayerLayer的模糊内容

Question

有没有办法模糊 AVPlayerLayer 中显示的内容？
内容是流式资产（m3u8），因此没有 AVAssetReader 等选项。

Answer 1

尝试使用下一个解决方案来获取图像：

CIImage *snaphotImage = nil;
AVPlayerItem *item = ((AVPlayerLayer*)view.layer).player.currentItem;
if (item.status == AVPlayerItemStatusReadyToPlay)
{
    AVURLAsset *asset = (AVURLAsset *)item.asset;
    AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
    CGImageRef thumb = [imageGenerator copyCGImageAtTime:((AVPlayerLayer*)view.layer).player.currentTime
                                              actualTime:NULL
                                                   error:NULL];
    snapshotImage = [CIImage imageWithCGImage:thumb];
    CGImageRelease(thumb);
}

然后对其应用模糊：

CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur" 
                              keysAndValues:@"inputRadius", @9.0,
                                            @"inputImage", snapshotImage, nil];
CIImage *resultImage = [filter outputImage];
UIImage *resultUIImage = [UIImage imageWithCIImage:resultImage];