Using Wink you can capture screenshots, add explanations boxes, buttons,

titles etc and generate a highly effective tutorial for your users.

  http://www.debugmode.com/wink/

                home page

In order to rrecord require VNC server running on host.

  http://www.unixuser.org/~euske/python/vnc2flv/index.html

                home page

  $ ffmpeg -f x11grab -s cif -i :0.0 capture.mpg

  #!/bin/bash

  let iter=1

  while [ "$iter" -le "$stop" ]; do

    import $iter.png

    sleep 1

    let x+=1

  done

If you interesting in capturing specific window - by 'xwininfo' find,

intereesting your window id (hex value) and use command:

  import -window $windowid $iter.png

To quick view result run:

  $ cd $img_dir

  $ animate -delay 20 *.png

  ^C

To compound image together:

  $ convert -delay 20 *.png capture.mng  # license free, multi-image file format

  $ convert -delay 20 *.png capture.gif

You can add text to pictures before compound theirs:

  $ mogrify -fill yellow -draw 'Rectangle 10,10 150,30' -fill black -pointsize 14 \

     -draw 'text 15,25 "by http://example.com"' $iter.png

If screen capturing slow for you use MIFF file format.

Use root flag to capture all screen:

  $ import -window root $iter.png

  http://linuxdevcenter.com/pub/a/linux/2004/03/04/screen_capture_movies.html

                Making Screen-Capture Movies by Robert Bernier