On one of my projects I was required to supply a character with Facial Mocap to a low cost. The solution was to utilize Mayas buit-in tracking feature, Live, to track the markers on the actors face and the transfer their motion to a face rig. The result really exceeded my expectations as you can see in the example clip. The only problem I have now is that Autodesk has discontinued the Live feature in Maya 2011 shifting focus to Autodesk Matchmover.
– Update –
I’ve posted a tutorial which explains how to set up this using Adobe After Effects, Autodesk MatchMover and Autodesk Maya.