使用MSS截取许多屏幕截图时，内存会迅速填满并导致python崩溃

Question

Here's my code:

import time
import cv2
import mss
import numpy as np

Frame = [0, 0, 1920, 1080]

def GetFrame():
    monitor = {"top": Frame[0], "left": Frame[1], "width": Frame[2], "height": Frame[3]}
    sct_img = mss.mss().grab(monitor)
    return np.asarray(sct_img)



while (True):
    inimg = GetFrame()
    cv2.imshow("WHY IS MEMORY SO HIGH???????", inimg)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cv2.destroyAllWindows() 

When this runs, it doesn't throw any errors, but looking in task manager, my memory fills quickly (after 200 iterations or so), eventually crashing my desktop, then python. I have looked into garbage collection , with no luck.

Python version 3.7.0
MSS version 4.0.1

Answer 1

Hmm, i fixed it myself, i have no idea why it works, but it does . Here's my high IQ solution:

import time
import cv2
import mss
import numpy as np

Frame = [0, 0, 1920, 1080]

def GetFrame():
    #########solution here
    with mss.mss() as sct: #<-- thats the solution.... yep
        monitor = {"top": Frame[0], "left": Frame[1], "width": Frame[2], "height": Frame[3]}
        sct_img = sct.grab(monitor)
        return np.asarray(sct_img)



while (True):
    inimg = GetFrame()
    cv2.imshow("Normal memory!!", inimg)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cv2.destroyAllWindows()

if someone wants to comment and explain why this works to me, then i'd be thankful :)