hi. i want to run ar_sys package . But i dont know that how i will define my laptop's camera to ROS . And i dont know how can i pass the proper launcher parameters (see launch files for details) to meet my camera device, calibration URI, pointing to the correct board configuration.

May u explain that with picture or video or explain it here ? Thanks.

when i try to run roslaunch ar_sys single_board.launch

There is this Error :

terminate called after throwing an instance of 'std::runtime_error'
  what():  pixel format unavailable
[ INFO] [1461717403.333087263]: ArSys node started with marker size of 0.050000 m and board configuration: /opt/ros/indigo/share/ar_sys/data/single/board.yml