Reading Image frame by frame from Saved videoes or Camera Using opencv Python

One of my friend was asking about reading image frames from videoes, so I thought a quick block may be very helpful for beginners. It is actually very easy, just follow the bellow steps:

Step 1. Installations

a. Install python

If you still do not have python in your system , please install python

For linux: sudo apt-get update $ sudo apt-get install python3.6

For windows: download the installation file from python website and follow the instructions

b. Install Opencv

For linux:

sudo pip3 install opencv-python

For Windows:

pip3 install opencv-python

Step2: Reading saved or camera video

- At first need to import the opencv

- Read the video either from camera or saved video

- While frame is available show the frame and save it. Finally release the camera and window which we used to show.

Hope you liked this post. I am posting the script below so that you can just copy paste. leave your feedback below.

import cv2

#if reading from saved video, need to specify where the file is saved
#cap = cv2.VideoCapture('D:\project\spoof\classification\test_video\test.avi')

#if reading from camera, camera id is 0 here
cap = cv2.VideoCapture(0)

while True:
    ret, frame = cap.read()

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    cv2.imshow('frame',gray)
    cv2.imwrite('savedImage.jpg', img)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()