小编ner*_*erk的帖子

我正在尝试在 ARKit 中对视频进行色度键控，并且我所做的与 @Felix 在这里所做的非常相似：GPUImageView inside SKScene as SKNode Material - Playing透明视频 on ARKit

但是，当视频应该显示时（在本例中，当检测到 AR 参考图像时）我收到错误[SceneKit] Error: Cannot get pixel buffer (CVPixelBufferRef)，视频不再播放。在我实现chromaKeyMaterial. 这是我的代码，从检测到 AR 参考图像后开始：

DispatchQueue.main.async {
let filePath = Bundle.main.path(forResource: "wigz", ofType: "mp4")
let videoURL = NSURL(fileURLWithPath: filePath!)
let player = AVPlayer(url: videoURL as URL)

let spriteKitScene = SKScene(size: CGSize(width: 640, height: 480))
let videoSpriteKitNode = SKVideoNode(avPlayer: player)
let videoNode = SCNNode()
videoNode.geometry = SCNPlane(width: imageAnchor.referenceImage.physicalSize.width,
              height: imageAnchor.referenceImage.physicalSize.height)
videoNode.eulerAngles = SCNVector3(-Float.pi/2, 0, 0) …