How to limit the number of FPS from camera

asked 2012-07-23 09:45:26 -0600

irv4479
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updated 2012-07-24 02:25:13 -0600

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I´m doing an application that recognizes speed limit signs based on Face Detection Android sample. I´ve got application almost done, when I show to camera one photo with speed limit signal inside, app detects an identify signal, It takes less than 1 second. The problem starts when I started tests mounting device on a car dock because when I get moving detection step fails continually. I'm using native detection_based_tracker and seems that it get saturated so I want to pass less frames to it. Is there a way to fix native camera FPS? I would need only approximately 5-10 FPS.

Thanks in advance.

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answered 2012-07-23 09:59:57 -0600

sammy
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Set your camera FPS to a lower value

VideoCapture cap(0);
cap.set(CV_CAP_PROP_FPS, 10);

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Sorry Sammy, but it seems that solution that you propose doesn't works on android. Highgui.CV_CAP_ PROP_FPS doen't exists on android.

In sample there is VideoCapture mCamera.

When I Try mCamera.set there is no option to fix FPS.

Thanks.

irv4479 ( 2012-07-25 08:11:31 -0600 )edit

You should check this similar answer http://answers.opencv.org/question/16/how-to-decrease-the-number-of-processed-frames/?answer=30#post-id-30

sammy ( 2012-07-25 08:19:24 -0600 )edit

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answered 2017-09-22 08:59:38 -0600

Anmol Limje
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Do This Thing:::

import cv2 import numpy as np

cap = cv2.VideoCapture(0) fps=0 #for decreasing fps

while True: ret,frame=cap.read() if fps>=10: cv2.imshow('frame drop',frame) fps=0 fps+=1 if(cv2.waitKey(1) & 0xFF==ord('q')): break

cap.release() cv2.destroyAllWindows()

This code will help you to drop frames

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