使用多处理在tkinter中显示OpenCV视频

Question

我目前正在尝试为 多处理OpenCV视频* 流开发 GUI
。下面的代码确实成功执行了此操作，因为它显示了视频供稿和一个“退出”按钮，但是运行方式很奇怪：
*

• 该程序 在退出时* （通过单击或通过单击关闭窗口）在（我正在使用Windows）中引发 运行时错误 ，表示程序“要求运行时以异常方式终止”pythonw.exe *quit button``'X'

关于如何解决该问题的任何想法将不胜感激！

我的代码：

#!/usr/bin/python

import numpy as np
from multiprocessing import Process, Queue
from Queue import Empty
import cv2
import cv2.cv as cv
from PIL import Image, ImageTk
import time
import Tkinter as tk

#tkinter GUI functions----------------------------------------------------------
def quit_(root, process):
   process.join()
   root.destroy()

def update_image(image_label, queue):
   frame = queue.get()
   im = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
   a = Image.fromarray(im)
   b = ImageTk.PhotoImage(image=a)
   image_label.configure(image=b)
   image_label._image_cache = b  # avoid garbage collection
   root.update()

def update_all(root, image_label, queue):
   update_image(image_label, queue)
   root.after(0, func=lambda: update_all(root, image_label, queue))

#multiprocessing image processing functions-------------------------------------
def image_capture(queue):
   vidFile = cv2.VideoCapture(0)
   while True:
      try:
         flag, frame=vidFile.read()
         if flag==0:
            break
         queue.put(frame)
         cv2.waitKey(20)
      except:
         continue

if __name__ == '__main__':
   queue = Queue()
   print 'queue initialized...'
   root = tk.Tk()
   print 'GUI initialized...'
   image_label = tk.Label(master=root)# label for the video frame
   image_label.pack()
   print 'GUI image label initialized...'
   p = Process(target=image_capture, args=(queue,))
   p.start()
   print 'image capture process has started...'
   # quit button
   quit_button = tk.Button(master=root, text='Quit',command=lambda: quit_(root,p))
   quit_button.pack()
   print 'quit button initialized...'
   # setup the update callback
   root.after(0, func=lambda: update_all(root, image_label, queue))
   print 'root.after was called...'
   root.mainloop()
   print 'mainloop exit'
   p.join()
   print 'image capture process exit'

• 配置：Windows 7 Home，Python 2.7.5，OpenCV 2.4

Answer 1

我通过在函数中使用process.terminate()代替来解决它。process.join()``quit_(root, process)