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import numpy as np import cv2

cap = cv2.VideoCapture(0)

while(True): ret, frame = cap.read() #frame = np.asarray(frame, dtype=np.uint8) frame = frame.astype('uint8') gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

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

cap.release() cv2.destroyAllWindows()

Error as below : File "<ipython-input-18-f3066c3e32f2>", line 9, in <module> frame = frame.astype('uint8')

AttributeError: 'NoneType' object has no attribute 'astype'

.

import numpy as np
import cv2
cv2
  
cap = cv2.VideoCapture(0)cv2.VideoCapture(0)
  
while(True):
    ret, frame = cap.read()
    #frame = np.asarray(frame, dtype=np.uint8)
    frame = frame.astype('uint8')
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)cv2.COLOR_BGR2GRAY)
  
 cv2.imshow('frame',gray)
 if cv2.waitKey(1) & 0xFF == ord('q'):
     break

cap.release()
cv2.destroyAllWindows()
 
cap.release()
cv2.destroyAllWindows() 
Error as below :
:
 
  File "<ipython-input-18-f3066c3e32f2>", line 9, in <module>
    frame = frame.astype('uint8')
frame.astype('uint8')
 
AttributeError: 'NoneType' object has no attribute 'astype'