onpencv VideoWriter程序不能储存

import numpy as np

import cv2

cap = cv2.VideoCapture(0)

fourcc = cv2.VideoWriter_fourcc(*'XVID')

out = cv2.VideoWriter('testwrite.avi',fourcc, 20.0, (1920,1080),True)

while(cap.isOpened()):

    ret, frame = cap.read()

    if ret==True:

        cv2.imshow('frame',frame)

        out.write(frame)

        if cv2.waitKey(10) & 0xFF == ord('q'):

            break

    else:

        break

cap.release()

out.release()

cv2.destroyAllWindows()

报错：[ WARN:1] global C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-6uw63ony\opencv\modules\videoio\src\cap_msmf.cpp (434) `anonymous-namespace'::SourceReaderCB::~SourceReaderCB terminating async callback