:crop-geometry and also :video-filter=croppadd / :croppadd-croptop don't seem to work. You can set crop geometry by adding desired crops into a list via ":custom-crop-ratios" and then calling libvlc_video_set_crop_geometry. e.g. :custom-crop-ratios=1:1,4:3,14:9,5:3,1850:1000,2350:1000,312x...