Inexpensive MoCap solution

This is an interesting approach to an inexpensive mocap workflow.
Basically they had shoot the scene using four cameras and reconstruct the pointcloud for every frame with VisualSFM.
This custom software CloudDigitiser2014 computed median points in a user defined range from the pointcloud and output x/y/z curves for any point
Abstract: Markerless 3D motion capture for animal locomotion studies