Deinterlacing outputs small file only

[jokris]

It doesn't seem to help any of the alternatives :/

[Selur]

Please, create debug output when calling the Avisynth Preview.
Also, does disabling Interframe change anything - in your config aside from eating cpu ccircles it doesn't to anything?
(Interframe sometimes has issues with the gpu drivers on some systems)

Cu Selur

Ps.: I tested your script here and had no problem.