Small update:
DrDre’s color matching tool works like a charm! Too bad one cannot use it with AviSynth (or can one?) and thus I’ll need to render a color-corrected intermediate.
The following piece of code doesn’t work, unfortunately:
fields=last.AssumeBFF.SeparateFields()#.DFMDeRainbow()#remove # to turn on, beware of unwanted desaturation
backward_vec2 = fields.MVAnalyse(isb = true, delta = 2, pel = 2, overlap=4, idx = 1)
forward_vec2 = fields.MVAnalyse(isb = false, delta = 2, pel = 2, overlap=4, idx = 1)
fields.MVDegrain1(backward_vec2,forward_vec2,thSAD=400,idx=1,plane=3)#reduces color noise with no negative effect
AviSynth reports an error that MVAnalyse cannot be found (although it works fine if called standalone, but not as a fields method). Strange.