Hello,
Ok, understood – have a look to the reply from Richard in this e-mail thread, he also
provided a standard compliant suggestion.
Cheers,
Henning
--
Henning Westerholt –
https://skalatan.de/blog/
Kamailio services –
https://gilawa.com<https://gilawa.com/>
From: Simone de Blasiis <simone.deblasiis(a)teameis.it>
Sent: Friday, April 22, 2022 5:33 PM
To: Henning Westerholt <hw(a)gilawa.com>
Cc: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Subject: Re: [SR-Users] How to disable video in invite with both audio and video
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.htm…
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@gilawa.com<mailto:hw@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<https://gilawa.com/>
From: sr-users
<sr-users-bounces@lists.kamailio.org<mailto:sr-users-bounces@lists.kamailio.org>>
On Behalf Of Simone de Blasiis
Sent: Friday, April 22, 2022 4:32 PM
To: sr-users@lists.kamailio.org<mailto:sr-users@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