import cv2

cap = cv2.VideoCapture(0)


while True:
    ret, frame = cap.read()
    cv2.imshow('Live Video', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

Traceback (most recent call last):

File "C:/Users/Admin/PycharmProjects/industrialcamera/ICvideocapture.py", line 11, in <module>

cv2.imshow('Live Video', frame)

cv2.error: OpenCV(4.1.0) C:projectsopencv-pythonopencvmoduleshighguisrcwindow.cpp:352: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'