10-bit H.264 support?

[Undefined]

I tried to play an .mkv with a 10-bit encode, but it only plays a second of audio with no video before crashing.
Right now, I'm using mplayer2 (which has 10-bit H.264 suppport).
When I try to play the file using the terminal the video comes out perfectly, but I get no audio (terminal mplayer2 does not recognize ALSA, so it tries to play using OSS, which doesn't work. The other audio outputs available in the driver list in mplayer2 also do not work).
I am using Fedora 15.