mencoder -subfont-text-scale 2.4 -passlogfile pass1.log -ovc x264 -x264encopts pass=1:bitrate=2000:threads=2:turbo=1 \
-nosound -sub subtitlefile.srt -o /dev/null inputfile.avi
mencoder -subfont-text-scale 2.4 -passlogfile pass1.log -ovc x264 -x264encopts pass=2:bitrate=2000:threads=2 \
-oac mp3lame -lameopts q=0:aq=0 -sub subtitlefile.srt -o outputfile.avi inputfile.avi