Kivy相机内存错误

时间:2016-12-20 16:00:14

标签: python kivy kivy-language

我在带有Logitech网络摄像头的Raspberry Pi 3上运行的kivy中有以下摄像头代码:

class KivyCamera(Image):

    def __init__(self, **kwargs):
        super(KivyCamera, self).__init__(**kwargs)
        self.capture = None

    def start(self, capture, fps=30):
        self.capture = capture
        Clock.schedule_interval(self.update, 1.0 / fps)

    def stop(self):
        Clock.unschedule_interval(self.update)
        self.capture = None

    def update(self, dt):
        ret, frame = self.capture.read()
        if ret:
            # convert it to texture
            cv2.putText(frame, "Testing!", (0, 50), cv2.FONT_HERSHEY_COMPLEX, 2, (100, 0, 255))
            buf1 = cv2.flip(frame, 0)

            if (recON == 1):
                out.write(frame)
            #
            buf = buf1.tostring()
            image_texture = Texture.create(
                #size=(frame.shape[1], frame.shape[0]), colorfmt='bgr')
                size=(frame.shape[1], frame.shape[0]), colorfmt='rgb')
            image_texture.blit_buffer(buf, colorfmt='bgr', bufferfmt='ubyte')
            #self.canvas.ask_update()
            self.texture = image_texture

从Logitech C920(在液晶显示屏上)显示帧约3分钟后,我得到下面的memory exception。如果我使用Logitech C170,它将运行更长时间约5分钟:

enter image description here 对我来说,似乎缓冲区溢出。具有更高分辨率的C920填充速度更快,但我在代码中看不到缓冲区正在填满?

1 个答案:

答案 0 :(得分:1)

运行代码时,我注意到了这个警告:

enter image description here

当我改变python线时:

image_texture.blit_buffer(buf, colorfmt='bgr', bufferfmt='ubyte')

为:

image_texture.blit_buffer(buf, colorfmt='rgb', bufferfmt='ubyte')

我不再收到warning或内存泄漏。我使用cvtColor

opencv功能替换了颜色空间