recording script using recordmydesktop command

#!/bin/bash
#
# Warning: this does not have robust error checking!

bad=67
if [ $# -lt 1 ]
then
echo "Usage: $0 [filename] [[optional time]]"
exit $bad
fi

if [ $# -eq 1 ] #check for arguments
then
time=3 #if one (only filename) exists, sleep for 3 seconds
filename=$1 #set filename
else
time=$2 #else, we'll sleep for $2 seconds
filename=$1 #set filename
fi

recordmydesktop -windowid `xwininfo |grep "Window id:"|sed -e "s/xwininfo\:\ Window id:\ //;s/\ .*//"` -o $filename.ogv -delay $time --no-sound

ffmpeg -i $filename.ogv -b 384000 -s 640x480 -pass 1 -passlogfile log-file $filename.flv