cv2.error: C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:331: error: (-215) size.width>0 && size.height>0 in function cv::imshow

Question

from cv2 import cv2

cap = cv2.VideoCapture(0)

while (1): _, frame = cap.read()

cv2.imshow("", frame)

if cv2.waitKey