blue screen circular tracking

Hi,
I’m curently working on a circular tracking shot and i have some difficulties to have a good solution. I have a better solution at the end of the shot than in the beginning.
I have trying different appraoch like user, automatic, tracking. mixed of both. I have extract some clean (without motion blur) frame fome differents takes to use as references.
The only info i have is the film back.
I think my bigest isue is the size of motion blur and the lake of marker at the font of the shot. But it’s like that :cool:.

I ‘m coming to know if maybe someone have adifferent approach. and to have some answere for those questions:

– In this case is it better to set the auto track as a free move or maybe something else (none).

– in this case where do you put your initial frame?

– is it an obligation to undistord the picture before tracking (and how can i undistord this picture (where are the straightline for y))?

– in Pftrack, when you use a user track and it failed, is it a good idea to use the hide function and later replace the tracker and continue. Or simply create a new tracker

– In pfT solver do you change the camera Translation and/or Rotation?

Thank you for all ideas

B

or http://vimeo.com/27285752

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