采用AVPlayer- Swift的无缝循环视频

Question

我使用AVPlayer在后台播放本地视频，使用循环，视频播放很好，但在完成视频后，需要暂停播放循环视频。我尝试过很多方法，也见过很多关于堆栈溢出的帖子，但是我没有找到合适的解决方案。我正在使用Swift3。

代码在这里：

var videoplayer :AVPlayer = AVPlayer()

override func viewDidLoad() {
super.viewDidLoad()

let path = Bundle.main.path(forResource: "background4", ofType: "mp4")
        videoplayer = AVPlayer(url: URL(fileURLWithPath: path!))
        videoplayer.volume = 0     
        videoplayer.actionAtItemEnd = AVPlayerActionAtItemEnd.none;

        let playerLayer = AVPlayerLayer(player: videoplayer)
        playerLayer.frame = self.view.frame
        playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill

        if (videoplayer.rate != 0) {
            print("playing videoplayer")
            self.blurBgImage.isHidden = true
        }

        playerLayer.zPosition = -1
        videoplayer.rate = 0
        videoplayer.play()
        self.blurBgImage.layer.addSublayer(playerLayer)

 NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: videoplayer.currentItem, queue: nil, using: { (_) in
        DispatchQueue.main.async {

             let t1 = CMTimeMake(5, 100)
            self.videoplayer.seek(to: t1)
            self.videoplayer.play()
        }
    })
}

我也尝试过AVPlayerLooper。守则是：

 var playerLooper: NSObject?
var playerLayer:AVPlayerLayer!
var queuePlayer: AVQueuePlayer?

 func playVideo(_ filmName: String){
       if let path = Bundle.main.path(forResource: filmName, ofType: "mp4")        let url =  URL(fileURLWithPath: path)
         if #available(tvOS 10.0, *) {
          let playerItem = AVPlayerItem(url: url as URL)
            self.videoplayer = AVQueuePlayer(items: [playerItem])
            self.playerLayer = AVPlayerLayer(player: self.videoplayer)
            self.playerLooper = AVPlayerLooper(player: self.videoplayer as! AVQueuePlayer, templateItem: playerItem)
            self.blurBgImage.layer.addSublayer(playerLayer!)
            self.playerLayer?.frame = self.view.frame
            self.videoplayer.volume = 10
            self.videoplayer.play()
        } else {
            videoplayer = AVPlayer(url: url)
            videoplayer.play()
            loopVideo(videoplayer)
        }
}
}

我该怎么做才能实现无缝循环？提前谢谢。

Answer 1

这里有示例代码：https://developer.apple.com/library/content/samplecode/avloopplayer/Introduction/Intro.html

@matt删除的答案对我(在设备/模拟器上)对于iOS 10+设备来说很好：

使用AVPlayerLooper。这正是它的目的。 https://developer.apple.com/reference/avfoundation/avplayerlooper 基本上，它为您实现AVQueuePlayer，不断更新队列，使其永不结束。

它无缝地循环，没有任何白色/黑色的斑点。

例如。

private var looper: AVPlayerLooper?

...

let queuePlayer = AVQueuePlayer(playerItem: item)
looper = AVPlayerLooper(player: queuePlayer, templateItem: item)
videoPlayerLayer.player = queuePlayer

如果在可重用单元(例如UICollectionView)中这样做，那么确保在单元重复使用之前禁用循环，否则会出现一些模糊的崩溃：

looper?.disableLooping()