i'll use this option when i'll have the SL-5500:

mencoder "$INFILE" -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=300:vpass=1 -lameopts cbr:br=64 -vf scale -zoom -xy 320 -oac mp3lame -o $OUTFILE
mencoder "$INFILE" -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=300:vpass=2 -lameopts cbr:br=64 -vf scale -zoom -xy 320 -oac mp3lame -o $OUTFILE

Now for the C1000, wich option ?

mencoder "$INFILE" -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=300:vpass=1 -lameopts cbr:br=64 -vf scale -zoom -xy 640 -oac mp3lame -o $OUTFILE
mencoder "$INFILE" -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=300:vpass=2 -lameopts cbr:br=64 -vf scale -zoom -xy 640 -oac mp3lame -o $OUTFILE

In you experience, how i can speedup the process and reduce the final space of the .avi maintaining a good graphic and sound ?

THANKS

Bye