This is a quick proof of concept. Using IPI Soft's trackerless motion capture software, a simple test movement captured utilising a Kinect Camera. The motioncapture then was mapped onto a custom rig from Maya(FBX) and then re-exported. The file was then tested in the Unity Game Engine.
Motion capture, tracking and transfer to character was done in about 20 mins.
Video showing depth capture using Kinect - and re-targetting to character