[OpenSIPS-Users] missing direction attribute using RTPProxy

[Răzvan Crainea]

Hi, John!

There's no way to automatically add the "direction" attribute. If you 
want to add it, you have to "manually" change the SDP using a regular 
expression[1,2,3].

[1] http://www.opensips.org/html/docs/modules/1.10.x/textops.html#id293689
[2] http://www.opensips.org/html/docs/modules/1.10.x/textops.html#id249164
[3] http://www.opensips.org/html/docs/modules/1.10.x/textops.html#id250047

Best regards,

Razvan Crainea
OpenSIPS Core Developer
http://www.opensips-solutions.com

On 01/15/2014 07:36 PM, John Quick wrote:
> I have a case where we have to use RTPProxy rather than Mediaproxy because
> bridging mode is required as well as far-end NAT traversal.
>
> However, calls from some mobile SIP clients are getting 1-way audio and I
> think this is because the client requires the "direction:active" attribute
> to be present in the SDP to make it use symmetric RTP. (I have some SIP
> packet captures for other sites where Mediaproxy was used and they show this
> directive is present, but with RTPProxy it is not).
>
> I think it may need the s/w flag to be used in rtpproxy_offer, but the
> documentation does not explain these flags properly. Does anyone have
> experience of these flags or know how else it is possible to get the
> "direction" attribute added?
>
> Thanks.
>
> John Quick
> Smartvox Limited
> Web: www.smartvox.co.uk
>
>
>
>
>
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