-y -r 20 -b 150000 -s 320x240 -vcodec libx264 -vpre medium -vpre baseline -acodec aac -f mp4
/usr/local/bin/ffmpeg -strict experimental -i 9.mpg -y -r 20 -b 150000 -s 320x240 -vcodec libx264 -vpre medium -vpre baseline -acodec aac -f mp4 /tmp/aa10.mp4