Any Ideas ?
Looks like latest Intel's drivers are quite buggy o_O
There's not enough information now what is the reason - Windows 10, Broadwell/Skylake core or just some latest drivers update.
Or it's something like "NVidia + Win 10 + CUVID decoder" issue.
All I can suggest now is to try more options to narrow the issue down:
- turn off QuickSync decoder in LAV
- try some earlier driver versions
- try Windows 7/8