ios - 在 SceneKit 中使用 MPMoviePlayerController 作为纹理

Question

我在 scenekit 中创建了一个立方体，并尝试使用 MPMoviePlayerController 的实例作为其 Material 。它有点好用但不是很好:视频似乎非常跳跃，就像它会在视频帧之间跳跃(基本上是从开始播放帧到播放的最后一个点)。声音还可以。

我对正在发生的事情进行了简短的截屏，我想从视频中可以明显看出:Youtube vid

这是处理立方体映射和玩家创建的代码:

var moviePlayer: MPMoviePlayerController?

func startPlayingVideo(){
    let mainBundle = NSBundle.mainBundle()
    let url = mainBundle.URLForResource("Sample", withExtension: "m4v")
    moviePlayer = MPMoviePlayerController(contentURL: url)

    if let player = moviePlayer{
        /* Listen for the notification that the movie player sends us whenever it finishes playing */
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "videoHasFinishedPlaying:", name: MPMoviePlayerPlaybackDidFinishNotification, object: nil)
        println("Successfully instantiated the movie player")
        player.scalingMode = .AspectFit

        var materials = [SCNMaterial]()
        for i in 1...6 {
            let material = SCNMaterial()
            material.diffuse.contents = player.view.layer
            player.view.frame = CGRectMake(0, 0, 200, 200)
            materials.append(material)
        }
        boxGeometry.materials = materials

        player.controlStyle = MPMovieControlStyle.None
        player.play()
    }
    else {
        println("Failed to instantiate the movie player")
    }
}

关于如何解决此帧跳转及其发生原因的任何想法？非常感谢

Answer 1

我打开了一个radar关于 AVPlayerLayer 不作为 SceneKit 纹理工作(在设备上......在模拟器上工作!)。 Apple 很友善地回复说这是按预期工作的，并提供了一个替代方案:

AVPlayerLayer are rendered out of process on the device and can’t be used as a texture. Please use a SKVideoNode for this instead.