python mss ScreenShotError

Asked Feb 24 '19 at 19:11

Active Feb 24 '19 at 19:11

Viewed 273 times

So basically I'm just messing around with mss (python2.7 and 3.6), and I have the following code:

import mss
import cv2
import numpy as np

with mss.mss() as sct:
    mon = {'top':40,'left':0, 'width': 800, 'height': 750}
    try:
        img = np.array(sct.grab(mon))
        cv2.imshow('Screen',img)
        cv2.waitKey(0)
        cv2.destroyAllWindows()
    except mss.ScreenShotError:
        print(sct.get_error_details())

It should just take a screenshot and display it, but it just dies with the following information:

{'xerror_details': {'type': 0, 'serial': 405, 'error_code': 7, 'request_code': 0, 'minor_code': 0}, 'xerror': 'BadFont (invalid Font parameter)'}

What am I doing wrong?

I have read something about resources not being freed, but before that I messed around with code without the with statement, and without calling free or close, or whatever. It crashed, I did a reboot, to no avail.

asked Feb 24 '19 at 19:11

Ervin

What MSS version? And what is the content of the `DISPLAY` envar? I just tired with the 4.0.2 on Python 3.6 and your code works just fine. – Tiger-222 Feb 27 '19 at 12:35
@Tiger-222 I have Mss 4.0.2, and echo $DISPLAY shows :0. It used to work, but it no longer does, after I have ran it a few times – Ervin Feb 27 '19 at 16:41
Is it the exact code you gave that is raising such error? – Tiger-222 Feb 28 '19 at 21:21
Yes, it is the code – Ervin Mar 01 '19 at 14:56
Does it works with 4.0.1 or 4.0.0? – Tiger-222 Mar 02 '19 at 17:46

python mss ScreenShotError

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