Find frame rate (frames per second-fps) in OpenCV (Python/C++)

#!/usr/bin/env python
import cv2
import time
if __name__ == '__main__' :
 # Start default camera
 video = cv2.VideoCapture(0);
 # Find OpenCV version
 (major_ver, minor_ver, subminor_ver) = (cv2.__version__).split('.')
 # With webcam get(CV_CAP_PROP_FPS) does not work.
 # Let's see for ourselves.
 if int(major_ver) < 3 :
 fps = video.get(cv2.cv.CV_CAP_PROP_FPS)
 print("Frames per second using video.get(cv2.cv.CV_CAP_PROP_FPS): {0}".format(fps))
 else :
 fps = video.get(cv2.CAP_PROP_FPS)
 print("Frames per second using video.get(cv2.CAP_PROP_FPS) : {0}".format(fps))
 # Number of frames to capture
 num_frames = 120;
 print("Capturing {0} frames".format(num_frames))
 # Start time
 start = time.time()
 # Grab a few frames
 for i in range(0, num_frames) :
 ret, frame = video.read()
 # End time
 end = time.time()
 # Time elapsed
 seconds = end - start
 print ("Time taken : {0} seconds".format(seconds))
 # Calculate frames per second
 fps = num_frames / seconds
 print("Estimated frames per second : {0}".format(fps))
 # Release video
 video.release()

#include "opencv2/opencv.hpp"
#include <time.h>
using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
 // Start default camera
 VideoCapture video(0);
 // With webcam get(CV_CAP_PROP_FPS) does not work.
 // Let's see for ourselves.
 // double fps = video.get(CV_CAP_PROP_FPS);
 // If you do not care about backward compatibility
 // You can use the following instead for OpenCV 3
 double fps = video.get(CAP_PROP_FPS);
 cout << "Frames per second using video.get(CAP_PROP_FPS) : " << fps << endl;
 // Number of frames to capture
 int num_frames = 120;
 // Start and end times
 time_t start, end;
 // Variable for storing video frames
 Mat frame;
 cout << "Capturing " << num_frames << " frames" << endl ;
 // Start time
 time(&start);
 // Grab a few frames
 for(int i = 0; i < num_frames; i++)
 {
 video >> frame;
 }
 // End Time
 time(&end);
 // Time elapsed
 double seconds = difftime (end, start);
 cout << "Time taken : " << seconds << " seconds" << endl;
 // Calculate frames per second
 fps = num_frames / seconds;
 cout << "Estimated frames per second : " << fps << endl;
 // Release video
 video.release();
 return 0;
}

import cv2
if __name__ == '__main__' :
 video = cv2.VideoCapture("video.mp4");
 # Find OpenCV version
 (major_ver, minor_ver, subminor_ver) = (cv2.__version__).split('.')
 if int(major_ver) < 3 :
 fps = video.get(cv2.cv.CV_CAP_PROP_FPS)
 print ("Frames per second using video.get(cv2.cv.CV_CAP_PROP_FPS): {0}".format(fps))
 else :
 fps = video.get(cv2.CAP_PROP_FPS)
 print ("Frames per second using video.get(cv2.CAP_PROP_FPS) : {0}".format(fps))
 video.release()

#include "opencv2/opencv.hpp"
using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
 // Open video file
 VideoCapture video("video.mp4");
 // double fps = video.get(CV_CAP_PROP_FPS);
 // For OpenCV 3, you can also use the following
 double fps = video.get(CAP_PROP_FPS);
 cout << "Frames per second using video.get(CAP_PROP_FPS) : " << fps << endl;
 video.release();
 return 0; 
}

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