Opencv multithreading with python

Python
1

I am planning to take every 5 seconds a frame from the web cam and run all the calculations in separate thread. Unfortunately, after 5 seconds the video transmission stops and nothing happens, although video must be continiued. All I see in the output - is the message “time is now”. But as i tried to debug it, I could never go into the functions in threads.py

So this is my main.py:

from threads import myThread
import cv2 
import time 

vid = cv2.VideoCapture(0)


if __name__ == "__main__": 
    print("starting the measurements")
    threads = {}
    i=0
    
    t_past = t_now = time.time()
    period = 5
    while True:
        _,frame = vid.read()
        t_now = time.time()
        if t_now - t_past >=5 :
            print("time is now")
            t_past=t_now
            threads[i] = myThread(i,frame)
            threads[i].start()
            i+=1
       
        cv2.namedWindow("frame",cv2.WINDOW_NORMAL)
        cv2.imshow("frame",frame)
        
        cv2.waitKey(1)

and this is the threads.py:

import threading 
import gauge

class myThread(threading.Thread,gauge.Gauge):

    def __init__(self,id,frame):
        self.id = id
        threading.Thread.__init__(self)
        
        self.gg = gauge.Gauge(frame)
        
    def run(self):
        self.gg.makeBlur()
        self.gg.makeGray()
        self.gg.drawCircle()
        self.gg.findAngle()
        self.gg.findPressure()
2

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