cvpixelbuffer

I need to create a copy of a CVPixelBufferRef in order to be able to manipulate the original pixel buffer in a bit-wise fashion using the values from the copy. I cannot seem to achieve this with CVPixelBufferCreate , or with CVPixelBufferCreateWithBytes . According to this question , it could possibly also be done with memcpy(). However, there is no explanation on how this would be achieved, and which Core Video library calls would be needed regardless. This seems to work: - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer

I try to add a B&W filter to the camera images of an ARSCNView, then render colored AR objects over it. I'am almost there with the following code added to the beginning of - (void)renderer:(id<SCNSceneRenderer>)aRenderer updateAtTime:(NSTimeInterval)time CVPixelBufferRef bg=self.sceneView.session.currentFrame.capturedImage; if(bg){ char* k1 = CVPixelBufferGetBaseAddressOfPlane(bg, 1); if(k1){ size_t x1 = CVPixelBufferGetWidthOfPlane(bg, 1); size_t y1 = CVPixelBufferGetHeightOfPlane(bg, 1); memset(k1, 128, x1*y1*2); } } This works really fast on mobile, but here's the thing: sometimes a colored

How can I get the RGB (or any other format) pixel value from a CVPixelBufferRef? Ive tried many approaches but no success yet. func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!) { let pixelBuffer: CVPixelBufferRef = CMSampleBufferGetImageBuffer(sampleBuffer)! CVPixelBufferLockBaseAddress(pixelBuffer, 0) let baseAddress = CVPixelBufferGetBaseAddress(pixelBuffer) //Get individual pixel values here CVPixelBufferUnlockBaseAddress(pixelBuffer, 0) } baseAddress is an unsafe mutable pointer or more