[ros-users] Problems with viewing a USB camera feed in RVIZ

Josh Faust jfaust at willowgarage.com
Fri Jul 2 17:54:45 UTC 2010

rviz's Camera display is meant for a camera running on a robot that's set up
properly (with TF, calibrated cameras, etc.).  It lets you see the 3D data
with the camera image overlaid.  If you just want to view an image,
image_view is the correct option.

As for #3, does rviz's memory usage start going up during that time?  If it
was killed, either it (or something else) was consuming a lot of memory, or
someone else killed it.


On Fri, Jul 2, 2010 at 4:27 AM, Benoit Larochelle <Benoit.Larochelle at dfki.de
> wrote:

>  Hello,
> I'm trying to set-up RVIZ so that I can view the feed from my USB camera. I
> am using the usb_cam package to produce the feed, but RVIZ seems to have a
> few problems reading it. I set-up the Fixed Frame to /head_camera, and
> Image Topic to /usb_cam/image_raw.
> 1) I get a global warning: No tf data. Actual error: Fixed Frame
> [/head_camera does not exist]. I don't know exactly what transforms and
> frames are, I just want to see my camera image (in RVIZ).
> 2) In the Camera section, I get a Status Error, under CameraInfo:
> CameraInfo/P resulted in an invalid position calculation (nans or infs)
> 3) After 15 minutes or so, RVIZ crashes with the error message:
> /opt/ros/boxturtle/ros/bin/rosrun: line 35: 304 Killed $exepath "$@" (before
> lunch, I started RVIZ and image_view and when I came back RVIZ had crashed
> and image_view was still going)
> 4) The image is much darker than with the package image_view
> Benoit
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