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how to show webcam in opencv

import cv2

cap = cv2.VideoCapture(0)

while True:
    success, img = cap.read()
    cv2.imshow("Webcam", img)
    if cv2.waitKey(1) == ord('q'):
        break
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Opencv Webcam

import cv2
frameWidth = 640
frameHeight = 480
cap = cv2.VideoCapture(0)
cap.set(3, frameWidth)
cap.set(4, frameHeight)
cap.set(10,150)
while True:
    success, img = cap.read()
    cv2.imshow("Result", img)
    if cv2.waitKey(1) and 0xFF == ord('q'):
        break
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