Cleaning old 640x480 AVI clips

[Al74]

probably since qtgmc adds some sharpening, so more smoothing and sharping,...

Probably you are right. In my clips I also see some aliasing/jumping lines, I must see if any other filters could help. Or maybe NNEDI3 while upscaling could do a job...
Do you use any other AI upscale than the NNEDI3 one?