利用ROS的usb-camera节点来打开usb-cam
https://blog.csdn.net/wilylcyu/article/details/51732710
rosrun uvc_camera uvc_camera_node
rosrun image_view image_view image:=/image_raw
roslaunch usb_cam usb_cam-test.launch
Linux录屏软件可参考博客：
https://blog.csdn.net/weixin_45592315/article/details/108038588
安装完成后，运行代码打开
simplescreenrecorder
