http://stackoverflow.com/questions/13437244/mjpg-streaming-with-a-raspberry-pi-and-a-webcam
-iのなかで-yとかの指定が必要っぽい
mjpg_streamer -i "/usr/lib/input_uvc.so -d /dev/video0 -y -r 320x240 -f 15" -o "/usr/lib/output_http.so -p 8080 -w ./www"
てかstart.shでいける?
./start.sh