Currently I have the following command in a script I'm using:

/usr/bin/mencoder /home/mypetman/public_html/media/videos/vid/108.wmv -o /home/mypetman/public_html/media/videos/flv/108_temp.flv -passlogfile /home/mypetman/public_html/media/videos/flv/108.log -ovc lavc -lavcopts vcodec=flv:vbitrate=600:mbd=2:mv0:trell:v4mv:keyint=240:cbp:last_pred=3:predia=4:dia=4:preme=2:vmax_b_frames=0:vb_strategy=1:vpass=1 -of lavf -oac mp3lame -lameopts abr:br=128 -srate 44100 -ofps 30.000 -vf harddup

I would like to add an overlay such as:

-vf "movie=/home/mypetman/public_html/images/watermark.png [watermark]; [in][watermark] overlay=10:10 [out]"

The overlay works when adding it to the image after the first command as a separate command but I'd like to incorporate it into the first.  Any Idea how I could do so?