Comment # 4 on bug 1186930 from Stakanov Schufter

The program was working, but as long as you did not use kaffeine in the very
same moment. 
The whole video issue is getting very shaky recently. So when e.g. Kaffeine
began to flicker (which was now and then, before the recent upgrade, now it
substantially broken), during the flicker vidcutter would experience problems
as well. Which then stopped when kaffeine was shot down.

But now it is simply not possible to open any file and to see even one frame.
It is just all a tetris like image.
So I doubt that this is directly vidcutter, but something vidcutter and
kaffeine and vlc do rely on. Handbrake (from Packman) was fixed instead. It was
broken before but as they do not have any offical bugzilla I do not know what
they did.