03_read_vid.py

#To read a video
import cv2

cap = cv2.VideoCapture(0) #capture from main cam is"0"

while(True):
    ret,frame = cap.read() #ret will store true or false

    #grey = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    cv2.imshow('frame', frame) #if you want grey press "grey" insted of "frame"



    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()