在 Raspberry Pi Zero W 上運行涉及 RPi Camera 的程序時，我遇到了一個問題。這是基于 AIY 套件中的 Joy Detector Demo。通常情況下，它會根據(jù)相機面部輸入（情緒）改變 LED 顏色并發(fā)出噪音，但我還添加了一個部分，可以將快樂程度傳輸?shù)?ThingSpeak。預期的輸出是程序運行，使用 camera ，而不是出現(xiàn)以下消息：mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPCmmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0xdd2800 (ENOSPC)mmal: mmal_connection_enable: output port couldn't be enabledERROR:__main__:Exception while running joy demo.Traceback (most recent call last):  File "/home/pi/AIY-projects-python/src/examples/vision/joy/joy_detection_demo.py", line 383, in main    args.enable_streaming, args.streaming_bitrate, args.mdns_name)  File "/home/pi/AIY-projects-python/src/examples/vision/joy/joy_detection_demo.py", line 307, in joy_detector    camera = stack.enter_context(PiCamera(sensor_mode=4, resolution=(820, 616)))  File "/usr/lib/python3/dist-packages/picamera/camera.py", line 433, in __init__    self._init_preview()  File "/usr/lib/python3/dist-packages/picamera/camera.py", line 513, in _init_preview    self, self._camera.outputs[self.CAMERA_PREVIEW_PORT])  File "/usr/lib/python3/dist-packages/picamera/renderers.py", line 558, in __init__    self.renderer.inputs[0].connect(source).enable()  File "/usr/lib/python3/dist-packages/picamera/mmalobj.py", line 2212, in enable    prefix="Failed to enable connection")  File "/usr/lib/python3/dist-packages/picamera/exc.py", line 184, in mmal_check    raise PiCameraMMALError(status, prefix)picamera.exc.PiCameraMMALError: Failed to enable connection: Out of resources 如果我需要從這些 python 文件中添加代碼，請告訴我，但我最好的選擇是它太密集了。使用蟒蛇3.7。