On Wed, 2010-11-10 at 13:33 +0100, Steven Bellens wrote: 
> Hey,
> 
> I had this set-up working before, but can't remember what I did
> different. Either I'm missing something or one of the packages has
> changed.
> >From the ar_pose wiki:
> 
> "Currently the ar_pose package requires calibration information from a
> camera_info topic. If there is no camera_info topic the marker pose
> estimation will not start."
> 
> Further on the option is given to try the package with the usb_cam
> driver: http://www.ros.org/wiki/usb_cam
> 
> Which however, does not publish a camera_info topic.
> 
> How can I make this work?
> 
> best regards,
> 
> Steven
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Have you tried using our version of usb_cam?
http://robotics.ccny.cuny.edu/git/usb_cam.git

Maybe we should unify all of the usb camera drivers at some point in the
future.