Hello! I'm kind of a newbie at posting animations here, and I have this weird issue: I render my animations in Cinema 4D as still images (png) and make an avi video of them in virtualdub. I think only mp4s are allowed here, so I convert the avis to mp4s with ffmpeg. They look fine and smooth when I play them in several video players on my PC, but if I upload them here to the gallery, they are displayed as jittery or laggy. Does anyone know why is that and what can I do to fix this? Be advised, some entries of my gallery contain nudity.