ROS websocket and nipplejs

tutorial

Run:

roslaunch ros_gui_bridge websocket.launch

Using UVC camera with "libuvc_camera" package

tutorial

1. Find vendor id and product id using udevadm info --name=/dev/video1 --attribute-walk
   For Thinkpad X1 Extreme Gen1, for cameras are listed using ls /dev/video*. They are "video[0:4]" where "video0" and "video1" are dedicated to integrated video camera and "video2" and "video3" are dedicated to integrated IR camera. "video1" is the one you want to use and "video0" provides metadata about the video data (source)
2. Use v4l2-ctl --list-formats-ext -d /dev/video0 to check the metadata including width, length, frame rate, and pixel format.
3. By default, $USER has to privilege to access the integrated camera. So adding privilege is needed (source) by sudo chmod a+w /dev/bus/usb/001/003.

Run:

roslaunch ros_gui_bridge camera.launch

Running video server using "web_video_server" package

tutorial

Run:

1. run server:

rosrun web_video_server web_video_server

2. visit http://0.0.0.0:8080
3. set parameters: http://0.0.0.0:8080/stream?topic=/image_raw&type=mjpeg&quality=10&invert&width=640&height=400&default_transport=compressed