Open a terminal window and type gstreamer-properties. Click the Video tab and click the Test button under the Default Input heading. A video window should appear showing what the webcam sees. If you receive an error, try selecting the Video for Linux (v4l) option from the Plugin dropdown list. If you still receive an error, the webcam is probably incompatible with Ubuntu. Note that once the selection is made in the Plugin dropdown list so that the webcam works, all applications that use webcams (such as Ekiga or Cheese, as described in Tip 15, on page 74) will be able to utilize it.
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