[Freeswitch-users] Sending announcements to all callers

[Support from NetworkedAudio LLC]

Asking again because the loopback method leaves lots of stale sessions over time and I’m using four gigabytes of memory for two hundred calls.

Problem – most (but not all) incoming SIP calls need to hear live announcements (currently coming in via PortAudio) once.

What I’d like to do is have these calls eavesdrop on the incoming audio but with eavesdrop() this stops working as soon as I am bridged into a conference.

What I have tried:

Conference auto-outcall to a loopback dialplan to an Announce conference with deaf flags set – these loopbacks keep increasing in number and over weeks lots of orphaned channels persist.
Eavesdrop a channel – doesn’t last once the incoming call is in a conference
Making portaudio_stream work on Windows. It crashes on access.
Making local_stream work on Windows. It needs core Unix-type support.

What I have not tried:

Eavesdrop whisper – I don’t think this persists after going into a conference.
Mod_spy – don’t think it persists after the spy (not the spyee) joins a conference, not sure I can spy on something non-Sofia.
Conference relate – keeping track of which members of a conference do and do not get this announcement is tricky long term and I’d still need the loopback.
Converting the incoming audio to an MP3 stream and then streaming to all conferences.

What I want is either a non-session paging, or a uuid_broadcast of a live channel, or the opposite of record – something that persists through changing conferences – so that the outgoing (from FS’s perspective) leg of certain calls always receives the incoming leg of another, named, fixed call.

Can anyone help?



From: FreeSWITCH-users <freeswitch-users-bounces at lists.freeswitch.org> on behalf of Support from NetworkedAudio LLC <support at naud.io>
Date: Friday, October 29, 2021 at 2:19 PM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] Sending announcements to all callers
Spoke too soon. Seems to be a memory leak doing it this way - will simplify and add a JIRA.

Switched to an Announce conference - portaudio is deaf, every autocall is mute. Still had to use loopback - @conference(Announce) doesn’t work.

Emailing for the sake of future searches.
________________________________
From: FreeSWITCH-users <freeswitch-users-bounces at lists.freeswitch.org> on behalf of Support from NetworkedAudio LLC <support at naud.io>
Sent: Friday, October 22, 2021 8:46 PM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] Sending announcements to all callers

Can't seem to do this at the call level, so have set up an autocall to the eavesdrop when the conference is made.

Then when the local resources access the conference, they put the eavesdrop call on hold and then store the UUID of that call in a lookup with the conference name.
The hangup hook on those local resources checks the conference xml_list and sees how many local members are left, and if none takes the eavesdrop off hold.

No loopback, resources seem OK. I'd prefer to do it pre-conference, but will see how this goes.

Any advice still welcome.

________________________________
From: Support from NetworkedAudio LLC
Sent: Thursday, October 21, 2021 12:02 PM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Subject: Sending announcements to all callers

I have a system where a user dials in, get authenticated and placed into a standard conference. Other local resources get added to the conferences as needed, and that is working well.

For safety reasons, we need to play a single incoming PortAudio channel to all dialed in users.

If I do an auto call or originate I can add a deaf member to each conference which is a loopback to an eavesdrop. This is messy but works.

However, it uses a lot of resources and now my local people have the announcements twice, with delay.

What I want is just to send audio out to those dialing in.

I have tried sending eavesdropping just to the incoming call but it won’t let me then join a conference through the dialplan - processing stops at the eavesdrop.

I see broadcast but can only send tones or saved files.

Ideally the incoming external callers would hear the announcements and not the conferences themselves. I’d like to avoid loopback, too.

Does anyone have ideas, please?
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