screencast.sh

#!/bin/sh
# set -x
HEIGHT=1024
WIDTH=768
FPS=15
OUT=$1 
VLC=vlc
# for os x use:
# VLC=/Applications/VLC.app/Contents/MacOS/VLC 

$VLC screen:// -vvv \
       --screen-width=$WIDTH \
       --screen-height=$HEIGHT \
       --screen-fps=$FPS \
       --sout-transcode-fps=$FPS \
       --sout="#transcode{vcodec=h264,vb=800,scale=0.5,acodec=mp3,ab=128,channels=2}:duplicate{dst=std{access=file,mux=mp4,dst="$OUT"}}"