There are only 1080p, 720p, 480p in video size. I mean x2, 3x, 4x... multiplier downscale add to video size select. For example, playing at 1920x1080 and record at 960x510 (downscale x2). Or, i think it will be better, add ability to enter custom multiplier like 2.5, 4.8 etc.