It would be nice if we had a way to detect if a handler for StreamedMedia and/or Call.DRAFT channels is installed and show/hide them depending on that.

[18:18] <oggis_> d_ed: enumerate the (running and activatable) service names from the dbus daemon
[18:18] <oggis_> we possibly should have high-level convenience API for this
[18:18] <oggis_> then introspect them
[18:19] <oggis_> essentially, that'd be doing the same as the CD does
[18:19] <oggis_> actually this should perhaps be a MC feature
[18:19] <oggis_> it should export a dbus property of all channel classes it thinks it can handle

I think we could do the first part. How hard can it be?

Edit:

[18:23] <oggis_> d_ed: I wonder if you can check your own capabilities
[18:23] <oggis_> on the self contact
[18:24] <oggis_> though that'd only give you one connection's advertised caps at a time

Worth a test.

start audio/start video toolbuttons are activated only if both self and contact have the possibility to initiate one. 
see bug (https://bugs.kde.org/show_bug.cgi?id=275244).

So i think this bug can be closed.
Can anyone confirm?

I think you're right. We did it in the text-ui, and it apparently works there.

I'd like to see this done in the CL code before we close the bug.