Mine

$ cat 1.mpg.con

 font=/home/robert/.fonts/bardn.ttf
 ffactor=0 #black outline
# sub-bg-alpha=0 #background color ala closed captions
# sub-bg-color=0 #black to white
# subfont-text-scale=4.7 #truetype font scaling
# subfont-blur=1 #Slight blur
 subpos=100