plusangel

<launch>
  <arg name="foo"/>

  <node name="usb_cam" pkg="usb_cam" type="usb_cam_node"
    output="screen" >
    <param name="video_device" value="/dev/video0" />
    <param name="image_width" value="640" />
    <param name="image_height" value="480" />
    <param name="pixel_format" value="mjpeg" />
    <param name="camera_frame_id" value="usb_cam" />