Google脸部检测在转换为图像并尝试检测脸部时会崩溃

我正在创build一个带有滤镜的自定义相机。 当我添加下面的行时，它崩溃而不显示任何exception。

//设置video输出

func setupBuffer() { videoBuffer = AVCaptureVideoDataOutput() videoBuffer?.alwaysDiscardsLateVideoFrames = true videoBuffer?.videoSettings = [(kCVPixelBufferPixelFormatTypeKey as NSString): NSNumber(value: kCVPixelFormatType_32RGBA)] videoBuffer?.setSampleBufferDelegate(self, queue: DispatchQueue.main) captureSession?.addOutput(videoBuffer) } public func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, from connection: AVCaptureConnection!) { if connection.videoOrientation != .portrait { connection.videoOrientation = .portrait } guard let image = GMVUtility.sampleBufferTo32RGBA(sampleBuffer) else { print("No Image 😂") return } pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) ciImage = CIImage(cvImageBuffer: pixelBuffer!, options: CMCopyDictionaryOfAttachments(kCFAllocatorDefault, sampleBuffer, kCMAttachmentMode_ShouldPropagate)as! [String : Any]?) CameraView.filter = CIFilter(name: "CIPhotoEffectProcess") CameraView.filter?.setValue(ciImage, forKey: kCIInputImageKey) let cgimg = CameraView.context.createCGImage(CameraView.filter!.outputImage!, from: ciImage.extent) DispatchQueue.main.async { self.preview.image = UIImage(cgImage: cgimg!) } } 

但它正在崩溃 –

  guard let image = GMVUtility.sampleBufferTo32RGBA(sampleBuffer) else { print("No Image 😂") return } 

当我传递从CIImage创build的图像时，它不能识别图像中的人脸。 完整的代码文件是https://www.dropbox.com/s/y1ewd1sh18h3ezj/CameraView.swift.zip?dl=0

Answer 1

1）为缓冲区创build单独的队列。

  fileprivate var videoDataOutputQueue = DispatchQueue(label: "VideoDataOutputQueue") 

2）用此设置缓冲区

  let videoBuffer = AVCaptureVideoDataOutput() videoBuffer?.alwaysDiscardsLateVideoFrames = true videoBuffer?.videoSettings = [(kCVPixelBufferPixelFormatTypeKey as NSString): NSNumber(value: kCVPixelFormatType_32BGRA)] videoBuffer?.setSampleBufferDelegate(self, queue: videoDataOutputQueue ) // captureSession?.addOutput(videoBuffer)