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Currently i am getting depth data from delegate and even i converted to CIImage to check it's out put and it's gray scale but i cannot append that pixel buffer to AVAssetWriterInputPixelBufferAdaptor becuase once i tried to save in photo gallery i get error mentioned below. Error: The operation couldn’t be completed. (PHPhotosErrorDomain error 3302. Setup: private let videoDeviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInWideAngleCamera, .builtInDualCamera, .builtInTrueDepthCamera, .builtInDualWideCamera],mediaType: .video, position: .back) I tried both video pixel formats: videoDataOutput!.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String: kCVPixelFormatType_DepthFloat16] videoDataOutput!.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String: kCMPixelFormat_422YpCbCr8]