How to create animated GIF images of a screencast?

screen cast to gif.ssh

sudo apt-get install imagemagick mplayer gtk-recordmydesktop

#Then use Desktop Recorder to capture a portion of the screen/application to use as the screencast.
mplayer -ao null <video file name> -vo jpeg:outdir=output

#Use ImageMagick to convert the screenshots into an animated gifs.
convert output/* output.gif

#you can optimize the screenshots this way:
convert output.gif -fuzz 10% -layers Optimize optimised.gif


#Referencê
#http://askubuntu.com/questions/107726/how-to-create-animated-gif-images-of-a-screencast