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 <[email protected]> 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 <[email protected]> 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
> > _______________________________________________
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> > [email protected]
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>
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