also, i am trying to get my USB camera to work and i also have a inbuilt laptop camera. Currently it is activating my laptop camera. How do i switch over to the usb camera?

I am finally able to build the package. I was wondering why rosbuild doesn't work but build actually allows me to compile the codes. Also, after running the launch file, i do not see the video on my screen. My webcam is activated though. Here is errors from i get after using the launch file.

started roslaunch server http://ubuntu:51743/

SUMMARY

PARAMETERS * /uvc_camera/device * /rosdistro * /uvc_camera/fps * /uvc_camera/height * /uvc_camera/camera_info_url * /uvc_camera/frame * /rosversion * /uvc_camera/width

NODES / uvc_camera (uvc_camera/camera_node)

auto-starting new master process[master]: started with pid [3224] ROS_MASTER_URI=http://localhost:11311

setting /run_id to e3b85c52-7962-11e1-b7f2-00269e97ef00 process[rosout-1]: started with pid [3237] started core service [/rosout] process[uvc_camera-2]: started with pid [3245] [rospack] opendir error [No such file or directory] while crawling /home/sinjon/ros_workspace

[rospack] opendir error [No such file or directory] while crawling /home/sinjonros_workspace

opening /dev/video0 pixfmt 0 = 'YUYV' desc = 'YUV 4:2:2 (YUYV)' discrete: 640x480: 1/24 discrete: 352x288: 1/24 discrete: 320x240: 1/24 discrete: 176x144: 1/24 discrete: 160x120: 1/24 int (Brightness, 0, id = 980900): 0 to 127 (1) int (Contrast, 0, id = 980901): 0 to 127 (1) int (Saturation, 0, id = 980902): 0 to 127 (1) int (Hue, 0, id = 980903): -180 to 180 (1) bool (White Balance Temperature, Auto, 0, id = 98090c): 0 to 1 (1) int (Gamma, 0, id = 980910): 1 to 500 (1) menu (Power Line Frequency, 0, id = 980918): 0 to 2 (1) 0: Disabled 1: 50 Hz 2: 60 Hz int (White Balance Temperature, 0, id = 98091a): 2800 to 6500 (1) int (Sharpness, 0, id = 98091b): 0 to 127 (1) int (Backlight Compensation, 0, id = 98091c): 0 to 2 (1) bool (Exposure, Auto Priority, 0, id = 9a0903): 0 to 1 (1) current value of 10094851 is 1 unable to set control: Invalid argument ERROR: could not set some settings.
unable to set control

I've managed to figure out how to install the dependancies but have been trying to run the package. After typing in the following:

roslaunch ~/ros/stacks/camera_umd/uvc_camera/launch/camera_node.launch

i get this error:

Cannot locate installation of package uvc_camera: [rospack] opendir error [No such file or directory] while crawling /home/sinjon/ros_workspace [rospack] opendir error [No such file or directory] while crawling home/sinjon/ros/stacks [rospack] couldn't find package [uvc_camera]. ROS_ROOT[/opt/ros/electric/ros] ROS_PACKAGE_PATH[/home/sinjon/ros_workspace:/opt/ros/electric/stacks:home/sinjon/ros/stacks]

The package is in home/sinjon/ros/stacks/camera_umd/uvc_camera

did i do something wrong?

Hi,

I'm new to ROS as well as to linux and has been trying to get the usb camera to work.

I've followed the tutorials from: http://www.ros.org/wiki/ROS/Tutorials/InstallingandConfiguringROSEnvironment and http://www.ros.org/wiki/ROS/Tutorials/StackInstallation and http://www.iheartrobotics.com/2010/05/vision-for-robots-1-of-n-setup.html

but I'm still unable to install it properly. When i try to enter the command $rosmake --rosdep-install I get the error "No package or stack specified. And current directory 'usb_cam' is not a package name or stack name."

Can someone help me? thanks in advance!