root@ubuntu:~# source /opt/tros/local_setup.bash
root@ubuntu:~# ros2 launch hobot_usb_cam hobot_usb_cam.launch.py usb_video_device:=/dev/video8
[INFO] [launch]: All log files can be found below /root/.ros/log/2023-07-10-00-11-56-753188-ubuntu-10802
[INFO] [launch]: Default logging verbosity is set to INFO
[INFO] [hobot_usb_cam-1]: process started with pid [10804]
[hobot_usb_cam-1] [ERROR] [1688919117.122986096] [hobot_usb_cam]: Camera calibration file: /opt/tros/lib/hobot_usb_cam/config/usb_camera_calibration.yaml does not exist! Please make sure the calibration file path is correct and the calibration file exists!
[hobot_usb_cam-1] [ERROR] [1688919117.123709290] [hobot_usb_cam]: Cannot identify ‘/dev/video8’: 2, No such file or directory! Please make sure the video_device parameter is correct!\n
[hobot_usb_cam-1] [ERROR] [1688919117.123847163] [hobot_usb_cam]: Hobot USB Cam Init failed
[hobot_usb_cam-1]
[hobot_usb_cam-1]
^C[WARNING] [launch]: user interrupted with ctrl-c (SIGINT)
[INFO] [hobot_usb_cam-1]: process has finished cleanly [pid 10804]
