我有两个摄像头（使用OpenNI，每个摄像头有两个流，由驱动程序API的相同实例处理），并希望有两个线程，每个线程独立地从每个摄像头捕获数据，即驱动程序API的一个实例，比方说cam_handler，我有两个流depth和rgb每个摄像机，说cam_handler.RGB1_stream和cam_handler.DEPTH1_stream

这是相同的代码：

import threading

def capture_and_save(cam_handle, cam_id, dir_to_write, log_writer, rgb_stream,
                     depth_stream, io):
    t = threading.currentThread()
    shot_idx = 0
    rgb_window = 'RGB' + str(cam_id)
    depth_window = 'DEPTH' + str(cam_id)
    while getattr(t, "do_run", True):
        if rgb_stream is not None:

            rgb_array = cam_handle.get_rgb(rgb_stream)
            rgb_array_disp = cv2.cvtColor(rgb_array, cv2.COLOR_BGR2RGB)
            cv2.imshow(rgb_window, rgb_array_disp)
            cam_handle.save_frame('rgb', rgb_array, shot_idx, dir_to_write + str(cam_id + 1))
            io.write_log(log_writer[cam_id], shot_idx, None)

        if depth_stream is not None:
            depth_array = cam_handle.get_depth(depth_stream)
            depth_array_disp = ((depth_array / 10000.) * 255).astype(np.uint8)
            cv2.imshow(depth_window, np.uint8(depth_array_disp))
            cam_handle.save_frame('depth', depth_array, shot_idx, dir_to_write + str(cam_id + 1))
        shot_idx = shot_idx + 1

        key = cv2.waitKey(1)
        if key == 27:  # exit on ESC
            break
    print "Stopping camera %d thread..." % (cam_id + 1)
    return

def main():
    ''' Setup camera threads '''
    cam_threads = []
    dir_to_write = "some/save/path"
    for cam in range(cam_count):
        cam = (cam + 1) % cam_count
        cv2.namedWindow('RGB' + str(cam))
        cv2.namedWindow('DEPTH' + str(cam))
        one_thread = threading.Thread(target=capture_and_save,
                                      name="CamThread" + str(cam + 1),
                                      args=(cam_cap, cam, dir_to_write,
                                            log_writer,
                                            rgb_stream[cam], depth_stream[cam], io,))
        cam_threads.append(one_thread)
        one_thread.daemon = True
        one_thread.start()

        try:
            while True:
                pass
                # cv2.waitKey(1)
        except KeyboardInterrupt:
            ''' Stop everything '''
            for each_thread in cam_threads:
                each_thread.do_run = False
                each_thread.join(1)
            cam_cap.stop_rgb(rgb_stream)
            cam_cap.stop_depth(depth_stream)

            ''' Stop and quit '''
            openni2.unload()
            cv2.destroyAllWindows()

if __name__ == '__main__':
    main()

因此，我的问题是，如果我cv2.imshow()从代码中删除这些行，那么一切都会按预期运行，并且我会将两个相机输出都保存到文件中。但是，在这些cv2.imshow()行中，仅创建了“空白”窗口，线程似乎被“卡住”，根本没有输出。
我尝试了一些建议，包括将namedWindow创建内容移动到主线程以及capture_and_save线程中。我还尝试过绕过，waitKey()因为据说OpenCV仅允许waitKey()在主线程中使用。没什么区别。