How to get Metadata in python ONVIF? - metadata

Question

Currently, I'm looking for metadata access functions using the in Python-onvif.
I want to get the coordinates of "BoundingBox" inside the red box.
How to i access data?
https://www.onvif.org/ver20/analytics/wsdl/analytics.wsdl#op.GetSupportedMetadata
This function was used, but an AttributeError occurred.
from onvif import ONVIFCamera
cam = ONVIFCamera('192.168.100.133', 80, 'ID', 'P/W')
cam.create_analytics_service()
meta = cam.analytics.GetSupportedMetadata()
print(meta)
result:
Traceback (most recent call last):
File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\zeep\proxy.py", line 97, in __getitem__
return self._operations[key]
KeyError: 'GetSupportedMetadata'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\User\AppData\Roaming\JetBrains\PyCharmCE2021.2\scratches\meta_data.py", line 24, in <module>
meta = cam.analytics.GetSupportedMetadata()
File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\onvif\client.py", line 167, in __getattr__
return self.service_wrapper(getattr(self.ws_client, name))
File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\zeep\proxy.py", line 88, in __getattr__
return self[key]
File "C:\Users\User\anaconda3\envs\py310\lib\site-packages\zeep\proxy.py", line 99, in __getitem__
raise AttributeError("Service has no operation %r" % key)
AttributeError: Service has no operation 'GetSupportedMetadata'
I need your help.

Answer 1

I'm not exactly using the same onvif package you are, and I'm not so sure myself how to achieve this, but this is what I've got so far:
Both the package python-onvif, that you are using, and the Valkka inspired implementation I'm using, rely on a folder WSDL which contains pretty old versions of Onvif operations. It seems we both were using version 2.2 while the current version is 20.12.
So what I did was to download the newer versions at their repository and replace the contents of the WSDL folder with the content of the new WSDL folder.
I also had to replace how the paths were built since now there is some folder hierarchy inplace to reach the WSDL files, but after that I was able to call GetSupportedMetadata successfully.