Getting my head around mind mangling motion tracking program
Icarus.
Now, as you surely know, Icarus obtains and calibrates camera information from a 2d source and exports it for full integration with a 3d program and or compositing program. Or some such spoddy nonsense.
If that means nothing to you, congratulations: you have a life.
Basically it stops the computery 3d bit (the Lord Tunley logo) from drunkenly wandering around the footage and so makes it look more a part of the scene.
Nice.