Yes, the invalid projection matrix in the camera info is the problem. Have
you calibrated your cameras?

On Thu, Jun 3, 2010 at 9:53 AM, Ivan Dryanovski
<ivan.dryanovski@gmail.com>wrote:

> Hi,
>
> I am sending some markers to be visualized in rviz. They come out
> fine. I also have a Camera display showing a video from an image
> topic. The video is also coming out fine in the Camera window. I was
> expecting to be able to see the markers also appear in the "Camera"
> window, similar to this ROS video
> http://www.youtube.com/watch?v=i--Sd4xH9ZE at around 0:20. However, I
> don't see anything in the Camera window other than the images.
>
> I have set the alpha of the camera to 0.2, and all the tf between the
> world frame and camera frame is fine.
>
> I'm getting the following error in the camera: "CameraInfo/P resulted
> in an invalid position calculation (nans or infs)". I checked the
> camera_info topic, and all the calibration values are set to 0. Is
> that the source of the problem?
>
> Thanks,
>
> Ivan Dryanovski
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