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

Benoit Larochelle Benoit.Larochelle at dfki.de
Tue Jul 6 09:27:32 UTC 2010


Hi,

Unfortunately, RVIZ eats up memory even in cturtle. I tried 3 different usb_cam drivers, including the one from Bill Morris, and it does not change anything for RVIZ.

Benoit


From: Benoit Larochelle 
Sent: Monday, July 05, 2010 10:09 AM
To: ros-users at code.ros.org 
Subject: Re: [ros-users] Problems with viewing a USB camera feed in RVIZ


Hi Josh,

It seems highly probable that RVIZ was killed due to memory usage. I ran a long test this morning, after having rebooted my computer and the robot, and RVIZ did not crash but it's memory usage was every increasing. It started at 25 MB and after 15 minutes was at 100 MB. It seems like the more movement there is in the image, the faster the memory increases.

I'm going to upgrade to c-turtle and see what happens.

Benoit


From: Josh Faust 
Sent: Friday, July 02, 2010 7:54 PM
To: ros-users at code.ros.org 
Subject: Re: [ros-users] Problems with viewing a USB camera feed in RVIZ


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.


Josh


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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