Hasta La Motion!

Hi,
I’m having huge problems tracking what I think to be a pretty straight forward scene. My fears are that it may be down to lack of camera info on my behalf. I’m not sure of the focal length or the film back parameters. Although I’ve tracked successfully without them before, I’m aware that this is my first attempt in an enclose space.
I’ve provided a link to the clean plate as below:
http://www.youtube.com/watch?v=UGeZqHWeD34

I’ve tried tracking it in PFTrack 2011 and in Nuke with the CameraTracker node. I’ve tried it after fixing rolling shutter and lens distortion, and also (just to see), without fixing either. In Nuke I basically tweaked an auto track several times, whereas in PFTrack I tried 6-7 times with an array of different user tracks, auto tracks, target tracks.

No matter what I try in either program, the track is always solid, but once solved the ground plane is anything but solid. Also, the closest I came to a half decent solve one time in PFTrack 2011, the focal distance was bizarre. The ground plane would be stretch way off into the ‘distance’ when in actual fact it was barely more than 15 feet away!!

If anyone could shed any light on this or offer any advice, I’d be eternally grateful.

By the way, my cam is a very modest Sony Handycam – HDR-CX106e.

Huge thanks in advance.
Chaz