Webcam doesn't work in Hydro
As i used the
$ roslaunch rbx1_vision uvc_cam.launch device:=/dev/video0
in the book ros-by-example for hydro , i find the output like this :
exbot@ubuntu:~/catkin_ws$ roslaunch rbx1_vision uvc_cam.launch device:=/dev/video0
... logging to /home/exbot/.ros/log/bda49708-6edb-11e4-b665-44334c160d17/roslaunch-ubuntu-4099.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.
started roslaunch server http://ubuntu:34919/
SUMMARY
========
PARAMETERS
* /rosdistro
* /rosversion
* /uvc_cam_node/device
* /uvc_cam_node/exposure
* /uvc_cam_node/frame_rate
* /uvc_cam_node/gain
* /uvc_cam_node/height
* /uvc_cam_node/width
NODES
/
uvc_cam_node (uvc_cam/uvc_cam_node)
ROS_MASTER_URI=http://localhost:11311
core service [/rosout] found
process[uvc_cam_node-1]: started with pid [4117]
[ INFO] [1416292448.855562602]: opening uvc_cam at 320x240, 20.000000 fps
opening /dev/video0
capabilities 84000001
pixfmt 0 = 'YUYV' desc = 'YUV 4:2:2 (YUYV)'
discrete: 640x480: 1/30 1/30
discrete: 320x240: 1/30 1/30
camera formats supported
format 0 = 'YUYV' desc = 'YUV 4:2:2 (YUYV)'
discrete: 640x480: 1/30 1/30
discrete: 320x240: 1/30 1/30
[ WARN] [1416292448.856026405]: Reconfigure callback failed with exception couldn't set format:
and when i used :
$ rosrun image_view image_view image:=/camera/rgb/image_color
it only show a blank window;
why ??
i can see the picture form my webcam from cheese, but cant use it in ROS hydro
thinks a lot !