[seco]

Originally Posted by Inker

Maybe because coreAVC is payware while ffdshow is free and open source? Besides, it can handle most audiocodecs too whereas with you're combination as far as I can tell you also need a seperate ac3 decoder and so on (assuming the mkv comes with an ac3 track).

Well the first post has a statement about CoreAVC:

Requirements

* CoreAVC Codec (yes I know its not free, but it's worth the few bucks) (CoreAVC.com: World's Fastest High Definition H.264 Video Software Decoder

which is indeed true and the reason for recommending it again.

Basically CoreAVC + CCCP + AC3Filter would be my choice.