[Jackaudio] Properties

[Bruno Vernay]

Hi,
I am trying to use properties, but I might be missing something:
I tried multiple variations:

jack_property -l
Jack: JackClient::SetupDriverSync driver sem in flush mode
Jack: JackLinuxFutex::Connect name = jack_sem.1002_default_jack-property
Jack: Clock source : system clock via clock_gettime
Jack: JackLibClient::Open name = jack-property refnum = 7
could not retrieve all properties

jack_property -ps system:capture_1
http://jackaudio.org/metadata/pretty-name "Toto"
Jack: JackClient::SetupDriverSync driver sem in flush mode
Jack: JackLinuxFutex::Connect name = jack_sem.1002_default_jack-property
Jack: Clock source : system clock via clock_gettime
Jack: JackLibClient::Open name = jack-property refnum = 7
Jack: jack_set_property ext_client 246af040 client 246af040
cannot set value for key Toto of system:capture_1

 jack_property -p -s system:capture_1 "Toto"
http://jackaudio.org/metadata/pretty-name
Jack: JackClient::SetupDriverSync driver sem in flush mode
Jack: JackLinuxFutex::Connect name = jack_sem.1002_default_jack-property
Jack: Clock source : system clock via clock_gettime
Jack: JackLibClient::Open name = jack-property refnum = 7
Jack: jack_set_property ext_client 51646040 client 51646040
cannot set value for key http://jackaudio.org/metadata/pretty-name of
system:capture_1

I am using  jack-audio-connection-kit-1.9.14-2

Bruno