The utility called "capture" may be accessed by typing the following:

	capture <movie or image name>

A description from the man pages:

     "capture" is an interactive program to record digital media files from the
     camera, microphone and workstation screen.   It provides four basic
     modes: recording a movie (uses both camera and microphone), recording a
     single image (uses camera only), recording a sound (uses microphone
     only), and grabbing a snapshot of the workstation screen.  The current
     mode is set by selecting the video camera, still camera, microphone or
     snapshot icon from the menu in the lower-left corner of the capture
     window.

     In each mode, pressing on the Record button will begin recording a file
     of the given type.  Clicking on the Record button will terminate the
     recording.  (When recording an image, the recording terminates
     automatically.  Also, when making a screen snapshot, you can abort the
     procedure by pressing the middle mouse button.)  After recording your
     file, you may preview it by using the Preview command in the capture
     menu.

To access the man pages for "capture", type "man capture".  This will give you
a complete listing of options that can be used.

The image format for snapping images is an SGI file type.  The movie type
can be accessed by using "movieplayer".