linuxProblems

[quick@localhost ~]$ ffmpeg -y -f alsa -ac 2 -i pulse -f x11grab -r 30 -s `xdpyinfo | grep 'dimensions:'|awk '{print $2}'` -i :0.0 -acodec pcm_s16le output.wav -an -vcodec libx264 -vpre lossless_ultrafast -threads 0 output.mp4

Function: creates a video of your desktop

Reference: http://www.commandlinefu.com/commands/view/148/capture-video-of-a-linux-desktop