I've tried everything I can think off and my conclusion is JRiver MC sucks at playback of Bluray material.
All my bluray moves is played back in slowmo and audio is completely out of sync.
DVD and regular Audio (flac, MP3) plays perfectly, HD material at 720p or less, no problems.
I've tried several players like Windows MP, MPC, Arcsoft TT5, Powerdvd, XBMC and they all play the movies nicely with no problems.
Tried to download several codecs (packs) and do custom video mode, windows merit, different video renders, splitters, decoders with no luck. Different OS like Windows 7 Ultimate, Home Premium, 32-bit, 64-bit, with or without Windows MP installed.
Different hard disks regular mechanical or SSD.
Different versions of MC both 16 and 17 same result.
I'm NOT in a good mood right now as MC is my best tools for organizing my media