A setting for decomb that works perfectly for the Futurama PAL DVDs is: telecide(firstlast=true,post=false) (don't ask me what firstlast=true does, I only used this setting because Donald Graft said it was perfect for those DVDs - and I thought he should know :D ) Don't add a deinterlacer, you don't need it anymore (and btw. when you're using telecide without "post=false" then it uses Fielddeinterlace for postprocessing automatically). Be sure to use the newest version of Decomb, though. I don't think you need a smoothing filter for Simpsons (or Futurama) from DVD source. I'm using temporalsmoother(4,1).spatialsoften(2,5,7).temporalsmoother(4) for Simpsons tv captures (in avisynth 2.06), but these are quite noisy with my cable tv. btw. I just finished encoding the Futurama season 1 DVD set to 640x480 Realvideo 9. I used the above telecide settings, and no other filters except bicubicresize(640,480,0,0.5). Using a bitrate of 907kbit including 132kbit audio (Atrac) it is as near to DVD quality as it can get. Try this with Divx...