Hi!
I want to share a humble mocap project that we (me and my friend) were working on about year ago.

http://youtu.be/nMQN1ouv_ds?hd=1

Main goal was to create simple face mocap with minimum amount of markers. It's only proof-of-concept, so there is only basic functionality. Source is written in C (openCV functions and Maya mocap server) + mel scripts. At the moment project is discontinued, waiting for spare time, but now when we have more knowledge i think it need to be fully rewritten.

Check out sources (if you want ), but it's messy:
https://github.com/XantusStudio/FaceCap