Hangs on generating thumbnails / slider not working

[zyll71]

When I open a .ts with VidCutter it hangs in "generating thumbnails" and nothing happens.
I can click play and start click, but i can't step through the video, go back, or set the position with the slider.
I'm using vidcutter 5.0.5.1 on OpenSuSE Tumbleweed.
libmpv: 0.2
FFmpeg: 4.4.3
PyQt: 5.15.7
Python 3.10.8

The log file is full of repeating instances of the following errors:

2022-10-28 19:15 - root - CRITICAL - <class 'TypeError'>: arguments did not match any overloaded call:
  QSize(): too many arguments
  QSize(int, int): argument 1 has unexpected type 'float'
  QSize(QSize): argument 1 has unexpected type 'float'
2022-10-28 19:15 - root - CRITICAL -   File "/usr/lib64/python3.10/site-packages/vidcutter/__main__.py", line 309, in timerEvent
    self.cutter.seekSlider.reloadThumbs()
  File "/usr/lib64/python3.10/site-packages/vidcutter/videoslider.py", line 343, in reloadThumbs
    self.initThumbs()
  File "/usr/lib64/python3.10/site-packages/vidcutter/videoslider.py", line 247, in initThumbs
    thumbsize = QSize(