DV50 mov files crash

[Selur]

The Vapoursynth Preview is under Filtering in the right lower corner.
I know where it crashes from the debut output. I crashes when calling:

"C:\Program Files\Hybrid\64bit\Vapoursynth\vspipe.exe" "C:\Users\USER\AppData\Local\Temp\encodingTempSynthSkript_2022-08-29@11_14_23_5910.vpy" - -c y4m | "C:\Program Files\Hybrid\64bit\x264.exe" --preset veryfast --pass 1 --bitrate 10000 --profile high --level 4.1 --direct auto --b-adapt 0 --sync-lookahead 15 --qcomp 0.50 --rc-lookahead 40 --qpmax 51 --aq-mode 0 --sar 8:9 --non-deterministic --range tv --stats "C:\Users\USER\AppData\Local\Temp\TestFile_2022-08-29@11_14_23_5910_09.stats" --demuxer y4m --input-range tv --fps 30000/1001 --output-depth 8 --output NUL -

x264 returns:

x264 [error]: could not open input file `-'
y4m [error]: bad sequence header magic

as error message which happens if:
a. there is a problem with the Vapoursynth script
b. the decoder can't access the Vapoursynth script properly (which usually only happens if some over reating virus scanner or similar is actively interfering)
-> I suspect there is an issue with the source filter. Try whether it helps to disable 'Filtering->Vapoursynth->Misc->Source->Prefer LSMASHSource voer LWLibAVSourcec for mp4/mov'.
(jobs&co naturally have to be recreated)

Cu Selur
Ps.: disabling 'Filtering->Vapoursynth->Misc->Source->Prefer LWLibAVSource over FFMpegSource2' might also help.