[SR-Users] reinvite with 2 video lines in SDP

[Filippo Graziola]

Hello,

thanks for replay. I will check how to make the script as per your
suggestion, many thanks for it.

Filippo

Il giorno lun 21 feb 2022 alle ore 16:15 Daniel-Constantin Mierla <
miconda at gmail.com> ha scritto:

> Hello,
>
> if you want to run kamailio development branch, then you should be able
> to do it with the body line iterator:
>
>   *
>
> https://www.kamailio.org/docs/modules/devel/modules/textopsx.html#textopsx.f.bl_iterator_start
>
> For stable branches at this moment I would run some inline
> Lua/Python/JavaScript/... script that builds the new body as wanted and
> then use KSR.textops.set_body(...) function.
>
> If you use rtpengine/rtpproxy, then you should also do msg_apply_changes().
>
> Cheers,
> Daniel
>
> On 21.02.22 15:55, Filippo Graziola wrote:
> > Hi all, I'm facing a strange behaviour from a client (iOS application
> > based on pjsip library) which is doing as follow when receiving a call
> > (on phone locked):
> > - accept the call rejecting video (m=video 0...) in SDP
> > - reinvite to negotiate again video media
> >
> > Specifically the reinvite passing through kamailio (+rtpengine) has
> > this SDP body after rtpengine offer (the client use TLS so I can't see
> > the original message):
> >
> > v=0
> > o=- 3854443139 3854443142 IN IP4 PUBLIC_RTP_ENGINE_IP
> > s=pjmedia
> > b=AS:386
> > t=0 0
> > a=X-nat:0
> > m=audio 46734 RTP/AVP 8 101
> > c=IN IP4 PUBLIC_RTP_ENGINE_IP
> > b=TIAS:96000
> > a=ssrc:1456418416 cname:441b90ac6db72f22
> > a=rtpmap:8 PCMA/8000
> > a=rtpmap:101 telephone-event/8000
> > a=fmtp:101 0-16
> > a=sendrecv
> > a=rtcp:46735
> > m=video 0 RTP/AVP 96
> > c=IN IP4 PUBLIC_RTP_ENGINE_IP
> > b=TIAS:256000
> > m=video 46776 RTP/AVP 98
> > c=IN IP4 PUBLIC_RTP_ENGINE_IP
> > b=TIAS:256000
> > a=rtpmap:98 H264/90000
> > a=fmtp:98 profile-level-id=42e01e; packetization-mode=1
> > a=sendrecv
> > a=rtcp:46777
> >
> > from this I can understand that the client is doing something strange,
> > because there is still the rejection line (I know that this question
> > should go to the pjsip guys) but I would also like to know if it is
> > possible to "clean" this sdp by kamailio.
> > A few clients receiving this sdp are answering with only audio.
> > Reading the docs, sdpops/textops modules allow modifying lines by
> > prefix or media, but till now I have no luck to exclude only the line
> > "m=video 0 RTP/AVP 96" and his attributes without touching the correct
> > video request. Could someone please give me some hints on it?
> >
> > __________________________________________________________
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> --
> Daniel-Constantin Mierla -- www.asipto.com
> www.twitter.com/miconda -- www.linkedin.com/in/miconda
> Kamailio Advanced Training - Online
>   Feb 21-24, 2022 (America Timezone)
>   * https://www.asipto.com/sw/kamailio-advanced-training-online/
>
>
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