I am impressed
I think in some of my older posts you can see me crying after avisynth.
When i was on Windows, using VirtualDub + Avisynth was the coolest thing ever, especially
Avisynth as the things you wrote in there were so quick to make changes that I wrote a standard avs file for my most common changes.
It was FUN to play around with it, and it was rather easy too.
Sadly I never became a real expert with Avisynth.
Nowadays I mostly rely on mencoder but it is GREAT to have alternatives, and I will try out Avisynth when i have more time.