Opencv does not works (Python 3) [closed]

asked 2020-09-13 09:19:24 -0500

Hi everybody! I`m trying to use opencv(opencv-contrib-python) + Python3.8 and my webcamera. And I have a warning:

"[ WARN:0] global C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-j8nxabm_\opencv\modules\videoio\src\cap_msmf.cpp (677) CvCapture_MSMF::initStream Failed to set mediaType (stream 0, (640x480 @ 30) MFVideoFormat_RGB24(codec not found)" My code is:

import cv2

cap = cv2.VideoCapture(0)

while True:
    ret, img =
    cv2.imshow("camera", img)
    if cv2.waitKey(10) == 27:

Tell me, please, what is the problem?

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Closed for the following reason the question is answered, right answer was accepted by sturkmen
close date 2020-09-14 12:05:38.379540


you can try cv2.VideoCapture(0, cv2.CAP_DSHOW)

sturkmen gravatar imagesturkmen ( 2020-09-13 09:32:09 -0500 )edit

Thank you very much! Now it works!

x-nikolas gravatar imagex-nikolas ( 2020-09-14 11:44:36 -0500 )edit