Abstract: A computer implemented method, computer system and computer executable program product are disclosed. The method includes running an application with a graphical output by a processor unit of a computer apparatus, analyzing the graphical output to detect and locate pixel changes in consecutive frames of the graphical output; and encoding video data of the graphical output, to a sequence of full frame and partial frame pictures, each of the full frame pictures including image data of an entire frame of the graphical display and each of the partial frame pictures including image data relating only to zones in a frame in which pixel changes where located.