Active Silicon Harrier 40x IP摄像机Python脚本运行报错求助

问题原因 #

报错[Errno 2] No such file or directory: '/wsdl\\devicemgmt-10.wsdl'是因为Valkka的DeviceManagement类默认尝试从本地路径加载WSDL文件，但路径格式错误（混合了正斜杠与反斜杠）或本地缺少该文件。C#示例能正常运行，说明摄像机的Onvif服务本身无问题，问题出在Python脚本的WSDL加载逻辑上。

解决方案 #

和你自定义MyDeviceIO类的思路一致，让DeviceManagement也使用Onvif官方的远程WSDL文件，避免本地路径依赖。具体修改如下：

1. 自定义MyDeviceManagement类，指定远程设备管理WSDL地址
2. 替换原代码中DeviceManagement的实例化，改用自定义类

修改后的完整代码 #

# Simple example showing how to send and receive VISCA commands 
# to the HArrier IP.
# To install Valkka: https://valkka.readthedocs.io/en/latest/requirements.html

from valkka.onvif import OnVif, DeviceManagement
import time   

IP = "10.10.10.102"
PORT=8000

# 自定义DeviceManagement，使用官方远程WSDL解决本地文件缺失问题
class MyDeviceManagement(OnVif):
    wsdl_file = "https://www.onvif.org/ver10/device/wsdl/devicemgmt.wsdl"
    namespace = "http://www.onvif.org/ver10/device/wsdl"
    sub_xaddr = "Device"
    port = "DeviceBinding"

# The deviceio.wsdl included in Valkka is missing the 'Token' element 
# for SendReceiveSerialCommand(). 
# The class below uses https://www.onvif.org/ver10/deviceio.wsdl,
# which is correct.
class MyDeviceIO(OnVif):
    wsdl_file = "https://www.onvif.org/ver10/deviceio.wsdl"
    namespace = "http://www.onvif.org/ver10/deviceIO/wsdl"
    sub_xaddr = "DeviceIO"
    port      = "DeviceIOBinding"

if __name__ == '__main__':
   try:
      # 使用自定义的MyDeviceManagement替代原DeviceManagement
      device_service = MyDeviceManagement(
      ip=IP,
      port=PORT,
      user="",
      password=""
      )

      deviceIO_service = MyDeviceIO(
        ip=IP,
        port=PORT,
        user="",
        password=""
      )

      deviceio_type_factory = deviceIO_service.zeep_client.type_factory("http://www.onvif.org/ver10/deviceIO/wsdl")

      ports = deviceIO_service.ws_client.GetSerialPorts()
      serial_token = ports[0].token

      zoom_tele = bytes.fromhex('81 01 04 07 02 FF')
      zoom_wide = bytes.fromhex('81 01 04 07 03 FF')

      print("Send zoom tele command")
      serial_data = deviceio_type_factory.SerialData(Binary=zoom_tele)
      resp = deviceIO_service.ws_client.SendReceiveSerialCommand(Token=serial_token, SerialData=serial_data, TimeOut='PT0M6S', DataLength='100', Delimiter='')
      print("Camera response: " + resp['Binary'].hex())

      time.sleep(3)

      print("Send zoom wide command")
      serial_data = deviceio_type_factory.SerialData(Binary=zoom_wide)
      resp = deviceIO_service.ws_client.SendReceiveSerialCommand(Token=serial_token, SerialData=serial_data, TimeOut='PT0M6S', DataLength='100', Delimiter='')
      print("Camera response: " + resp['Binary'].hex())

   except Exception as e:
      print(e)

额外检查 #

• 确保网络正常，脚本能访问Onvif官方WSDL地址；
• 确认摄像机Onvif服务端口（此处为8000）和权限配置正确；
• 验证zeep库安装完整，可通过pip install zeep重新安装。

内容的提问来源于stack exchange，提问作者Abdullah Nasir