Hi, Does anyone have any experience with viewing a image stream from a usb webcam? I have the usb_cam node (part of the bosch_drivers package) running, but I can't seem to view the video in rviz. It gives me an error saying 'fixed frame does not exist'. I get the same error when I run the camera using the uvc_camera node as well. With both nodes, I can see that the camera is turned on (the led next to the lens lights up), and I can display the raw image dump i a terminal, but what is the best way to actually view the video? Thanks.