Just wondering does anyone have a small example for a Qt based Vapoursynth viewer?

Goal is just decode a Vapoursynth script, show it inside a QWidget and navigate.
https://github.com/dubhater/vapoursynth-viewer also has more that I need + doesn't compile at all and notes 'Abandoned. Use VapourSynth Editor instead. '
https://bitbucket.org/mystery_keeper/vapoursynth-editor has way to many stuff, cutting code validation, code highlighting,... I only want a simple viewer.
-> so does someone have some simple viewer code for Vapoursynth Scripts?

(Background: wanted to see whether I could port MKV Cutter to Vapoursynth so that it could be used on Linux and Mac, but atm. it seems like to much hassle.)

Cu Selur