Metadata example not working

[lucianoiam]

I get an error when running the metadata example, JACK-Client 0.5.0, Python 3.7.3, Ubuntu 19.04:

Traceback (most recent call last):
  File "metadata.py", line 12, in <module>
    client.set_property(client, jack.METADATA_PRETTY_NAME, 'Best Client Ever')
  File "/home/user/.local/lib/python3.7/site-packages/jack.py", line 1520, in set_property
    .format(key, subject))
ValueError: Unable to set property 'http://jackaudio.org/metadata/pretty-name' for subject 0

[mgeier]

I'm not sure, but this might only work in the latest version of JACK2.

If you are already using the latest JACK2, you could try JACK1 instead, which had metadata support earlier.

[lucianoiam]

Thanks, I tried JACK1 0.125.0rc1 and works as expected:

Client "pretty" name: (b'Best Client Ever', '')
Port "pretty" name: (b'a good port', 'text/plain')
All client properties:
{'http://jackaudio.org/metadata/pretty-name': (b'Best Client Ever', '')}
All port properties:
{'http://jackaudio.org/metadata/pretty-name': (b'a good port', 'text/plain')}
All properties:
{4294967309: {'http://jackaudio.org/metadata/pretty-name': (b'a good port',
                                                            'text/plain')},
 8589934596: {'http://jackaudio.org/metadata/pretty-name': (b'Best Client Ever',
                                                            '')}}

[lucianoiam]

I also confirm that metadata works when running JACK2 1.9.13, but fails for 1.9.12 (ie, the public binaries at http://jackaudio.org/downloads/). You were completely right, thanks.