rebecca@rebecca-N220:~$ luvcview
luvcview 0.2.6

SDL information:
  Video driver: x11
  A window manager is available
Device information:
  Device path:  /dev/video0
Stream settings:
  Frame format: YUYV (MJPG is not supported by device)
libv4l2: error setting pixformat: Device or resource busy
Unable to set format: Device or resource busy
 Init v4L2 failed !! exit fatal