Read images videos and webcam

🧙 Getting an image:

img = cv2.imread("Resources/Wally.jpg")
#img = cv2.resize(img, (960,540))
cv2.imshow("Output", img)
cv2.waitKey(0)

🎥 Playing video from a file

import numpy as np
import cv2

cap = cv2.VideoCapture('vtest.avi')

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

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

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

cap.release()
cv2.destroyAllWindows()

📷 Capturing a video:

cap = cv2.VideoCapture(0)
cap.set(3, 640)     #width
cap.set(4, 480)     #height
cap.set(10, 150)    #brightness

while True:
    success, img = cap.read()
    cv2.imshow("Video", img)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break