Hi.
Try to play your MKV in MPC-HC player (is only one exe file).
If your probmem will be the same, you need to report such issue directly to MPC-HC team, becouse SAF is based on MPC-HC.
Here is MPC-HC forum: Media Player Classic Home Cinema - DXVA! - Doom9's Forum
I'll sure give this a try when I'm back home. Thanks for your quick reply!
Netherlands