22 Apr
2022
22 Apr
'22
6:32 p.m.
Hello Henning,
thanks for the suggestions.
You are right, I was referring to the sdp_remove_media() function. In the
documentation
<https://kamailio.org/docs/modules/5.5.x/modules/sdpops.html#sdpops.f.sdp_remove_media>
of the sdpops modules it cites RFC 3264 and it says that the number of m=
lines must be the same for both the offer and the answer.
We have experienced issues ourselves with this solution so it's not viable.
Sadly we can't return 415 either because it would mean that the call would
be dropped.
We have some devices that will always offer the video and that won't strip
it in any occasion from their invites.
Our only solution is to find a way of doing it ourselves with either
Kamailio or rtpengine.
Regards
Simone
Il giorno ven 22 apr 2022 alle ore 16:46 Henning Westerholt <hw(a)gilawa.com>
ha scritto:
Hello,
I did not look in the RFC regarding the removing the video line in
questions. You are probably referring to the sdp_remove_media() function.
Do you expect problems when you are doing this? A quick web search found a
similar suggestion also e.g. for Cisco router and others.
Another option would be to just return a 415 on the proxy level, by also
adding the supported types to the Accept header, like this:
Accept: audio/*
Cheers,
Henning
--
Henning Westerholt – https://skalatan.de/blog/
Kamailio services – https://gilawa.com
*From:* sr-users <sr-users-bounces(a)lists.kamailio.org> *On Behalf Of *Simone
de Blasiis
*Sent:* Friday, April 22, 2022 4:32 PM
*To:* sr-users(a)lists.kamailio.org
*Subject:* [SR-Users] How to disable video in invite with both audio and
video
Hello to everyone,
we have a Kamailio 5.5 + RTPEngine deployment.
Some devices will send an invite with both audio and video in the offer
and we are trying to disable the video portion of the invite by either
setting the video port to 0 or by setting a=inactive in the video portion
of the SDP packet.
We know that sdpops has a function that would be able to remove the video
portion but it violates standards so we can't use it.
We need to disable the video in the SDP offers because one of the pstn
providers we are using doesn't accept invites that contain a video offer.
I've spent days searching but I can't find an obvious way of achieving
this.
We were originally doing it with textops but we've been having some issues
where the sdp wouldn't be modified correctly in reinvites after the
original call is in place so we're looking for alternatives.
Can someone please help us?
Thanks in advance
Simone de Blasiis