Linux : convert avi for dreambox

I just created a script to convert every movie to a dreambox readable format (so i don't have to burn DVD's anymore ...

:
avi2db script using mencoder and backgrounded using screen:
screen -dmS "$1" mencoder -ofps 25 -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd -vf scale=720:576,harddup -srate 48000 -af lavcresample=48000 -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:keyint=15:acodec=ac3:abitrate=192:aspect=4/3 -o "/media/dreambox/avi/$(basename $1).mpg" "$1"