(In reply to Christian König from comment #4)
> (In reply to Andy Furniss from comment #3)
> > It seems that I can make it work reliably by setting my cpus to perf with
> > cpufreq.
> 
> Sounds like some kind of race condition to me, e.g. something isn't properly
> protected and multi thread save.
> 
> That's probably pretty hard to find.

Turns out I can also provoke this with kodi if I try enough, and cpufreq perf
doesn't always help mpv (but usually does).