Everything worked fine, as long as I encode without this line: "source.FlimsYLevels(10)"
When I do the encodings with this line in the avisynth-script, I get always this error: there is no function named "FilmsYLevels".
I searched in the doom9 forum and found this link here: Link
I installed the MaskTools-v1.5.5.dll but maybe I need another avisynth-plugin???
Any ideas?