AVPlayer无法播放大尺寸的高清视频

Question

我有一个Kiosk应用程序，它接收来自Dropbox SDK的视频，将数据保存到临时目录中，并使用AVPlayerLayer在循环中播放。

播放中小型视频（1334x750）时绝对没有问题，但尺寸较大（3888x2592）根本没有出现。有人可以指导我一个可能的解决方案或调试可能出错的方法吗？

这是我的代码：

func playVideo(data: Data) {
    playerLayer.removeFromSuperlayer()

    let path = URL.init(fileURLWithPath: NSTemporaryDirectory(), isDirectory: true)
    let url = path.appendingPathComponent("temp.mov")

    do {
        try data.write(to: url, options: .atomic)
    } catch let error {
        print("WRITING: \(error)")
    }

    player = AVPlayer(url: url)
    playerLayer = AVPlayerLayer(player: player)
    playerLayer.frame = videoView.bounds
    videoView.layer.addSublayer(playerLayer)
    player.play()

    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(self.loopVideo), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: nil)
    NotificationCenter.default.post(name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: nil)

}

func loopVideo() {

        player.seek(to: kCMTimeZero)
        player.play()

}