opencv-python，在线程里imshow图片QObject::killTimer: Timers cannot be stopped from another thread QObject::

硬件与环境

相机：realsense
系统：ubuntu 22.04
opencv版本：4.9.0.80

最小化代码示例：

class opencv_imshow_test(Node):
    def __init__(self):
        self.viz_thread = Thread(target=self.visulize)
        self.viz_thread.start()
        self.connect_camera()  
        self.camera_rgb = img # 这里是一张图片
        self.head_camera = Realsense_camera()
 	def visulize(self): 
        while True:
            self.camera_rgb,d,K = self.head_camera.get_one_frame()
            if self.camera_rgb is not None:
                cv2.imshow('rgb',self.camera_rgb)          
            cv2.waitKey(100)

报错

QObject::killTimer: Timers cannot be stopped from another thread
QObject::startTimer: Timers cannot be started from another thread

原因，目前查不到

解决办法

调整显示图片线程start的调用位置，如下，

class opencv_imshow_test(Node):
    def __init__(self):
        self.viz_thread = Thread(target=self.visulize)
        self.connect_camera()  
        self.camera_rgb = img # 这里是一张图片
        self.head_camera = Realsense_camera()             
# 把线程启动放在最后，就好了
        self.viz_thread.start()

奇怪的点

有的时候把线程启动放在最开始反而好使，有的时候是最后