frameList = MxpiDataType.MxpiFrameInfo()
        frameList.ParseFromString(camera_image.metadataVec[0].serializedMetadata)
        # Videodecoder information
        visionList = MxpiDataType.MxpiVisionList()
        visionList.ParseFromString(camera_image.metadataVec[1].serializedMetadata)

        vision_data = visionList.visionVec[0].visionData.dataStr
        visionInfo = visionList.visionVec[0].visionInfo

        # cv2 func YUV to BGR
        YUV_BYTES_NU = 3
        YUV_BYTES_DE = 2
        img_yuv = np.frombuffer(vision_data, np.uint8)
        print(f'type{type(img_yuv)}')

        # reshape
        img_bgr = img_yuv.reshape(visionInfo.heightAligned * YUV_BYTES_NU // YUV_BYTES_DE, visionInfo.widthAligned)
        # Color gamut conversion
        img = cv2.cvtColor(img_bgr, getattr(cv2, "COLOR_YUV2BGR_NV12"))