Originally posted by: Zion
Calibrate your monitor. Buy a new one if yours sucks. Don't convert your footage into another lossy codec for editing. (Work in a lossless codec if you're going to alter your footage, then re-encode.)

Edit: Oh, and know how to properly encode your video back to MPEG2. Master your software. All the work you've done will be for nothing if your encode turns out looking like crap.

In my project I have used the beginning of this movie from the 2004 DVD with necessary colour-corrections done by AviSynth filter colourlike.
And guess what ? It looks great on my oldie monitor at home, but looks EXACTLY like the crap posted above. The same artefacts in the same scenes. It is actually a great example how BAD the 2004 DVDs are, because it's a problem in the source video stream, not a codec problem.
I always use uncompressed avis or usually do all my edits in avs, and then I encode it straight to m2v. It's not my first video I'm doing, don't be afraid

I was asking if there's a chance to "fix" these kind of errors without repainting it frame by frame. My brain has enough of it after spending a month on repainting every single frame in the "Luke meets Biggs" scene