Watching MKV files on a Sony NX 710

[coldwilson2011]

I have a Sony NX 710.But when I tried to watch videos which are MKV format,I even can not find these videos over DLNA. WHAT is the problem?

[ikea2000]

Sony doesn't support .mkv containers/file extension. I'm searching for why since I really want to use my 2 screens for my PC but still play movies on the TV. (NX720).