I have recently switched my external player from MPC to MPC-HC version. When clicking on file from computer folder everything plays fine. however when I select movie or tv show from moving pictures or my TVSeries within mediaportal I either get one of two issues...1 sound only no picute or 2 file loads ans shows time but nothing actually plays. THis only happens for H264 MKV files it appears as my SD DVD's I have as MKV play fine. Not sure why it plays fine using same player from outside Mediaportal if anyone has any suggestions please let me know.