The present invention relates to a method for generating real-time motion video. The method comprises receiving, at a video processing device, calibration data from a memory in an image sensor unit, the calibration data relating to properties of the image sensor unit. The video processing device receiving real-time raw image data from the image sensor unit via a communication cable and a communication protocol. The video processing device processing the real-time raw image data received from the image sensor unit, where the processing includes adjusting received image data based on at least part of the received calibration data and encoding the image data to a predetermined video format, and outputting the processed image data in real time.