Question

我正在创建一个视频，其中添加了效果，但视频效果不佳。过滤后的视频卡住，播放不顺畅。

我选择了一个来自图书馆的视频并获取它的网址和资产，然后将其传递给下面描述的不同功能。

func createVideoComposition(filterEffect:String) -> AVVideoComposition {

let playerItem = AVPlayerItem(asset: self.videoAsset!)

let composition = AVVideoComposition(asset: playerItem.asset) { (request) in

    let sourceImage = request.sourceImage.clampedToExtent()

    guard let filter = CIFilter(name: filterEffect) else{
        return request.finish(with: NSError())
    }

    filter.setValue(sourceImage, forKey: kCIInputImageKey)

    return request.finish(with: filter.outputImage!, context: nil)
}

return composition }

以下是创建合成的功能。

func playVideo(url:URL,filter:Bool,composition:AVVideoComposition?){

let playerItem : AVPlayerItem!

if filter == true {
    playerItem = AVPlayerItem(asset: self.videoAsset!)
    playerItem.videoComposition = composition!
    self.player = AVPlayer(playerItem: playerItem)
}else{
    self.player = AVPlayer(url: url)
}

self.player.addObserver(self, forKeyPath: "player.currentItem.status", options: .new, context: nil)
avPlayerController = AVPlayerViewController()
self.avPlayerController.view.backgroundColor = .clear
avPlayerController.player = self.player
avPlayerController.view.frame = CGRect(x: self.viewVideoPlayer.frame.origin.x, y: self.viewVideoPlayer.frame.origin.y, width: self.viewVideoPlayer.frame.size.width, height: self.viewVideoPlayer.frame.size.height)
avPlayerController.showsPlaybackControls = false
self.viewVideoPlayer.addSubview(avPlayerController.view) }

我在这里播放视频
```
{{1}}
```
以下是输出
普通视频：String.prototype.indexOf()
已过滤的视频：https://www.dropbox.com/s/gehhks2z9pjbmpc/Normal%20Video.mov?dl=0

使用AVVideoComposition为视频添加cifilter效果但未获得预期输出

0 个答案: