very low rate in android fpsmeter

edit

hi. I am using my computers webcam on genymotion emulator. and when I run my app it shows 1-1.5 fps. I am trying to do track laser light. But when i give short pulse it does not detect it. I think its due to fps rate. any way to increase it? Because i couldn't find any good solution. On the other hand I didn't test my app with real device. if I test it will the rate increase?