load Video Using OpenCV in python

Question

Here is my code which is running...but I didnt understood why we used:

if cv2.waitKey(1000) & 0xFF == ord('q'): break

in the code......under display the resulting frame comment:

import numpy as np import cv2 cap = cv2.VideoCapture('C:\\Users\\KRK\\Desktop\\Dec17thVideo.mp4') while(True): # Capture frame-by-frame ret, frame = cap.read() # Our operations on the frame come here gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) # Display the resulting frame cv2.imshow('frame',gray) if cv2.waitKey(1000) & 0xFF == ord('q'): break # When everything done, release the capture cap.release() cv2.destroyAllWindows()

eshirima · Accepted Answer · 2017-12-16 15:50:52Z

waitkey displays the image for the specified number of milliseconds. Without it, you actually wouldn't be able to see anything. Then 0xFF == ord('q') detects when the keystroke q is pressed on the keyboard.

Think of waitkey as a pause function. After the code has been executed; at lightning speed :), waitkey says, pause for 1000 milliseconds to display the frame. Within this, detect if the user pressed q. If q is pressed, then get outside of my infinite while loop. When this happens, then the window won't be shown anymore.

Their documentation is a good resource as well.

Collectives™ on Stack Overflow

load Video Using OpenCV in python

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related