picamera.py 文件源码

def update(self):
        # keep looping infinitely until the thread is stopped
        for frameBuf in self.stream:
            # grab the frame from the stream and clear the stream in
            # preparation for the next frame
            self.frame = np.rot90(frameBuf.array)
            self.rawCapture.truncate(0)
            # if the thread indicator variable is set, stop the thread
            # and resource camera resources
            if self.stopped:
                self.camera.led = False
                self.stream.close()
                self.rawCapture.close()
                self.camera.close()
                return