13.09.2025, 14:29
Uploaded a new dev which should fix the popups.
I doubt that helps with the encoding and preview not working, since I can't reproduce the issue here.
Does this also happen if you use different source material? (different container, stream formats?)
Since the older version work for you: Does the Vapoursynth script look different in those versions?
Does it change anything if you move the temp folder outside of Windows? (so not under C:\Users\... or similar)
You don't have to test encoding, if Vapoursynth Preview does not work.
Cu Selur
I doubt that helps with the encoding and preview not working, since I can't reproduce the issue here.

Does this also happen if you use different source material? (different container, stream formats?)
Since the older version work for you: Does the Vapoursynth script look different in those versions?
Does it change anything if you move the temp folder outside of Windows? (so not under C:\Users\... or similar)
You don't have to test encoding, if Vapoursynth Preview does not work.
Cu Selur