Crash DVD encoding and Vapoursynth

[Selur]

but it did the same also with the previous encode that went fine and so I was not paying attention to it.

Normally, if the Vapoursynth Preview does not work, neither does the encoding if Vapoursynth is used.
=> looking at the debug output at this point is uninteresting until the Vapoursynth Preview works, since it uses the same environment the encode uses. (Assuming Vapoursynth actively gets used.)

Failed to initialize VapourSynth environment!

Usually happens if something is wrong with the Vapoursynth setup.
A few common things that could cause this:

• You modified/exchanged/added files in Hybrid.
  
• You got a systemwide Vapoursynth install. (This can issue due to autoloading plugins or when the versions Vapoursynth differ. Vapoursynth has no option to disable autoloading.)
  
• Some anti-virus software is interfering.
  

Cu Selur