pftrack solution problems please help

hi all. ive been trying for a few days now to track a bit of hand held video i shot walking round a parking space in a supermarket carpark (see attached). tha footage was shot in 1080 hd 25 fps.

i have :

1. corrected lens distortion ( see lens dist grid attached )
2. ive tracked using both user tracks and auto tracks together and seperatly
3 i seem to be able to track the first section of tha last section but not a complete sequence..
4. i have put down alot of tracking markers.. there are 4 yellow ones where the wheels of my cg car will go.. and there are plenty of good tracking points to be had with the surrounding area with lampposts, signs, floor markings etc…

is there any reasons you can think of that would stop me from tracking this shot? what should i have done different when shooting the footage? is there a technique i could try in PFTrack that could provide a solution?

any help or advice would be really useful….if any one is up for the challange i could up load higher res footage or an image sequence…

thanks – jim

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