我有两个摄像头（使用OpenNI，每个摄像头有两个流，由相同的驱动程序API实例处理），并且想要两个线程，每个线程捕获数据从每个摄像机独立，即驱动程序API的一个实例，说cam_handler，我有两个流depth和rgb每台摄像机，说cam_handler.RGB1_stream和cam_handler.DEPTH1_streamPython中的多线程cv2.imshow（）不起作用

下面是相同的代码：

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()

所以，我的问题是，如果我删除cv2.imshow()代码中的所有行都按预期运行，我将两个摄像头输出保存到文件。但是，使用cv2.imshow()行时，只会创建“空白”窗口，并且线程似乎“卡住”，根本没有输出。

我尝试了几个建议，包括将namedWindow创建移动到主线程以及capture_and_save线程。我也尝试在waitKey()之间移动，因为据说OpenCV只允许在主线程中使用waitKey()。然而，没有区别。