[Cin] About ffmpeg's geq filter

Right now it disabled, but may be you can dupply simplest default formula from http://underpop.online.fr/f/ffmpeg/help/geq.htm.gz to it, like in ffmpeg/plugins.opts geq p(W-X\,Y) right now this line is commented out... For some weird reason my intel machine fails to use any ffmpeg video filter, but they work on android/termux...