Thank you for your reply! I have no specific reason to use the Core Image pipeline besides ease of use with the API. I tried switching to a Metal pipeline, but am still seeing the image artifacts and this corresponding error:
metal Execution of the command buffer was aborted due to an error during execution. Internal Error (0000000e:Internal Error)
Another error mentioned the GPU was timing out, but I'm having trouble reproducing that one. Is there any way to make the command buffer wait longer?
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You can visualize some form of the result by reading the pixelBuffer from each VNPixelBufferObservation returned by the VNGenerateOpticalFlowRequest. For me, those results aren't super helpful, so I would also love to see the custom kernel that shows the magnitude and direction of the motion.
Has anyone been able to track it down?