Thank you for the many changes. - By now I am used to "s" and "z" and I think I will continue to use these, but it is a good thing to meet the needs of new users. - Excellent "drag speed highlights", really useful. The bug reported by Igor seems fixed. - F_minterpolate works but it is very heavy, also because it only works single-thread. Strange because normally ffmpeg plugins can use multi-threads. As for native "Interpolate Video" plugin; it seems to me that it works well in fast motion while it doesn't work well in slow motion, giving me these 2 errors to the terminal: MotionHVScan::pixel_search 535 range fail range1=0.000000 MotionHVScan::pixel_search 548 range fail range2=0.000000 I think, if possible, it would be better to fix this native plugin than to use the ffmpeg plugin.