[BUG] QTGMC Deinterlace with MFDIN = crash

[Selur]

Invalid magic number for yuv4mpeg.

Vapoursynth error => need DebugOutput of Vapoursynth Preview

Sidenote: Why are you overwriting the scanorder to BFF ? Looking at the clip it seems to be TFF encoded progressively.

Seems like the crash happens due to the output of:

[07/11/2026-08:02:04] [TRT] [W] Functionality provided through tensorrt.plugin module is experimental.

which isn't send to std:cerr, but std:out which then ends up inside the pipe and breaks the encoding.
Hybrid does try to fix this by using:

# Force logging to std:err logging.StreamHandler(sys.stderr)

but, seems like this capturing the output anymore.

seems like the issue was fixed once, see: https://forum.selur.net/thread-4089.html and https://github.com/vapoursynth/vapoursyn...2791015549, but seemingly was removed in newer Vapoursynth versions.
Seems like one would need to use named pipes instead of normal pipe to workaround this.
=> this will take a while to look into, since I'm ill atm. this won't happen this weekend.

Cu Selur