image capture of usb webcam on e-puck

Problem:

unsolved:

1.VIDIOC_QUERYMENU: Invalid argument

refer: 

http://www.andol.info/hci/1961.htm

"opencv image capture example" 

http://stackoverflow.com/questions/9035537/unable-to-build-open-cv-2-3-1-source-code

2.rosversion ros param

refer:

http://answers.ros.org/question/34471/roscore-runns-only-as-root-ubuntu-1204-fuerte/

http://answers.ros.org/question/44996/cannot-run-roscore-due-to-error-in-rosversion/

Solution:

$ source /opt/ros/fuerte/setup.bash

$ roscore