Kryptonit and Videocodec

Hi

When i play MP4 Videos, i have Freezes and Lipsync Probleme.
Small Files – maximum 1 GB.

On the same PC with VLC and TV App von Win 10 no Problems.
I tested 23 Files. This Files works fine on tho other 2 PCs.

Has somebody a Solution for that?

Thanks and Greetings
RAL9004