[OpenSIPS-Users] siprec/rtpengine in 3.4.x with odd tag behaviour

[Federico Alves]

I had no idea. Care to share them?


On Fri, Mar 6, 2026, 2:40 AM Andrew Yager <andrew at rwts.com.au> wrote:

> Not wanting to hijack my own thread, but have you compiled the g729 codec
> support into RTPEngine? There are build options you need to use.
>
> Andrew
>
>
> On Fri, 6 Mar 2026 at 00:40, Federico Alves <venefax at gmail.com> wrote:
>
>> Also, the RTP engine does not record any calls using the g729 codec.
>> Is there something I am missing?
>> Philip
>>
>> On Thu, Mar 5, 2026 at 5:55 AM Andrew Yager <andrew at rwts.com.au> wrote:
>> >
>> > Hi,
>> >
>> > I will put money on this being a "you're doing this all the wrong way"
>> and you're an idiot type issue.
>> >
>> > We're running OpenSIPS 3.4.16 with rtpengine 14.0.1.1 and trying to use
>> the siprec module with rtp_relay for call recording to a VoIPMonitor SRS.
>> >
>> > Setup:
>> >   - rtp_relay_engage("rtpengine") called before siprec_start_recording()
>> >   - rtp_relay handles the main call's media successfully (offer/answer
>> work, RTP flows)
>> >   - SIPREC INVITE is sent to SRS, SRS responds with 200 OK
>> >   - BYE sent to SRS immediately (~1ms after ACK)
>> >
>> > What we see in rtpengine debug logs:
>> >
>> > The subscribe request sent by rtp_relay uses from-tag: "1" rather than
>> the actual call participant's tag:
>> >
>> >   subscribe request: {"call-id": "...", "flags": ["all", "siprec"],
>> >     "from-tag": "1", "command": "subscribe request"}
>> >
>> > This succeeds. But the subsequent subscribe answer uses the real callee
>> tag:
>> >
>> >   subscribe answer: {"call-id": "...", "from-tag": "ffc01bf7-...",
>> >     "to-tag": "00e36c57...", "command": "subscribe answer"}
>> >
>> >   rtpengine returns: Failed to process subscription answer
>> >
>> > It appears the from-tag "1" in the subscribe request is wrong, because
>> it should be the actual SIP dialog tag (b2af6068 for caller, ffc01bf7-...
>> for callee), and so rtpengine can't correlate the subscribe answer back to
>> the subscription because the from-tag changed between request and answer.
>> >
>> > We're using rtp_relay_engage("rtpengine") followed by
>> siprec_start_recording("sip:x.x.x.x:5099") in ROUTE_INVITE after
>> create_dialog("B"). Do we need to call siprec_start_recording later, like
>> in the reply route on the 200 OK?
>> >
>> > Is what I'm doing wrong obviously wrong?
>> >
>> > Thanks,
>> > Andrew
>> > _______________________________________________
>> > Users mailing list
>> > Users at lists.opensips.org
>> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opensips.org
>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20260306/31b0af9b/attachment-0001.html>