问题描述
我正在尝试使用python从defualt carmera拍摄一张照片,为此,我正在使用openCV(从python shell中导入 )。但是,当我尝试禁用相机时,它会关闭,但出现错误 [WARN:0]终止异步回调。
I am trying to take a picture from the defualt carmera with python, to do this I am using openCV (import cv2 from python shell). However, when I attempt to disable the camera it closes but with the error [ WARN:0] terminating async callback.
这是我要运行的代码:
import cv2 camera_port = 0 camera = cv2.VideoCapture(camera_port) return_value, image = camera.read() cv2.imwrite("image.png", image) camera.release() # Error is here
代码输出所需的结果-需要保存图像,但我不明白为什么会出现错误消息或如何将其删除
The code outputs the desired result- it takes a saves an image but I do not understand why the error message occures or how to remove it
推荐答案
我有同样的警告。
只需将 camera = cv2.VideoCapture(camera_port)行修改为 camera = cv2.VideoCapture(camera_port,cv2.CAP_DSHOW)并添加 cv2.destroyAllWindows()作为代码的最后一行。
I had the same warning. Just modify the line camera = cv2.VideoCapture(camera_port) to camera = cv2.VideoCapture(camera_port, cv2.CAP_DSHOW) and add cv2.destroyAllWindows() as the last line of your code.
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