multiprocessing.Queue block process 异常阻塞子进程

实验代码

from multiprocessing import Process, Queue
import cv2
import numpy as np
import sys
import time

def putin(queue:Queue):
    # cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)
    # print(f'camera loaded.')
    # if cap.isOpened():
    #     _, frame = cap.read()