for PC

nice -n 19 mencoder input.avi -oac mp3lame -lameopts abr:br=128 -ovc lavc -lavcopts vcodec=mpeg4:vhq:v4mv:vqmin=2:vbitrate=1422 -ffourcc XVID -o out.avi

for DC

nice -n 19 mencoder -oac mp3lame -lameopts abr:br=128 -srate 22050 -ovc lavc -lavcopts vcodec=mpeg4:vhq:v4mv:vqmin=2:vbitrate=1500 -ffourcc XVID input.avi -o output.avi

for wmv convert to avi

mencoder infile.wmv -ofps 23.976 -ovc lavc -oac copy -o outfile.avi

for palm

mencoder -vf scale=320:240 -oac mp3lame -lameopts mode=0:cbr:br=96  -af volnorm -srate 32000 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=250  input.avi -o output.avi