Do you want to change/update the SDP once the call is established ? shouldn't it just work like this:

if(has_totag() && is_method("INVITE")) { if(search_body("video") { set_rtpproxy_set("1"); unforce_rtpproxy(); set_rtpproxy_set("2"); offer_rtpproxy("$avp(myflags)"); } }

Since it is already a ReINVITE any modification in the SDP c= part should be happily accepted !?

Regards, Sammy

On Thu, Jan 14, 2016 at 10:18 AM, Koray Vatansever < koray.vatansever@gmail.com> wrote:

Hi Sammy,

I'm not sure it will work. Assume the following scenario: Kamailio receives INVITE with audio only SDP and selects rtpproxy-1. After a while video is enabled with REINVITE. Now SDP has video and kamailio selects rtpproxy-2 according to your solution. In this case, most probably video and audio rtp packages will flow through rtpproxy-2. However what I want to do is to keep rtpproxy-1 for audio packages and add rtpproxy-2 for video packages and release audio ports from rtpproxy-1 and video ports from rtpproxy-2 when BYE received.

Is there any easy way to do that in Kamailio?

On Thu, Jan 14, 2016 at 3:30 PM, SamyGo govoiper@gmail.com wrote:

...

Hi, Yes thats possible as I think you can do a search in SDP body for "video" if found then select the rtpproxy instance else select other one.

Regards, Sammy On Jan 14, 2016 06:39, "Koray Vatansever" koray.vatansever@gmail.com wrote:

...

Hi everybody,

Is there a way to use different rtpproxies for different media types? I want to use one rtpproxy set for audio, and use another one for video. Is this possible in kamailio?

Regards, Koray

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Got it.

That is something that I dont think is possible with RTPproxy. Just read the functions for nathelper as well as rtpproxy twice and it just says it will modify the seasion level c= or media connection but nowhere it says we can tell which specific c attrib to modify. Im only assuming that even if multiple media types have different connection strings rtpproxy would just go and modify all at once or just the first one.

Its an interesting thing and I will be reading mediproxy and rtpengine and anyother available compatible media proxy to see if they allow that.

Worst case scenario source codes would need modification on kamailio as well as rtpproxy side to accomodate this.

Regards, Sammy On Jan 15, 2016 01:33, "Koray Vatansever" koray.vatansever@gmail.com wrote:

I think I couldn't explain myself clearly. I want to see the following media lines in resulting SDP:

m=audio 10076 RTP/AVP 97 98 c=IN IP4 rtpproxy1.example.com a=rtpmap:97 speex/8000 a=fmtp:97 vbr=on a=rtpmap:98 telephone-event/8000 m=video 20007 RTP/AVP 96 c=IN IP4 rtpproxy2.example.com a=rtpmap:96 VP8/90000

On Thu, Jan 14, 2016 at 8:31 PM, SamyGo govoiper@gmail.com wrote:

...

Do you want to change/update the SDP once the call is established ? shouldn't it just work like this:

if(has_totag() && is_method("INVITE")) { if(search_body("video") { set_rtpproxy_set("1"); unforce_rtpproxy(); set_rtpproxy_set("2"); offer_rtpproxy("$avp(myflags)"); } }

Since it is already a ReINVITE any modification in the SDP c= part should be happily accepted !?

Regards, Sammy

On Thu, Jan 14, 2016 at 10:18 AM, Koray Vatansever < koray.vatansever@gmail.com> wrote:

...

Hi Sammy,

I'm not sure it will work. Assume the following scenario: Kamailio receives INVITE with audio only SDP and selects rtpproxy-1. After a while video is enabled with REINVITE. Now SDP has video and kamailio selects rtpproxy-2 according to your solution. In this case, most probably video and audio rtp packages will flow through rtpproxy-2. However what I want to do is to keep rtpproxy-1 for audio packages and add rtpproxy-2 for video packages and release audio ports from rtpproxy-1 and video ports from rtpproxy-2 when BYE received.

Is there any easy way to do that in Kamailio?

On Thu, Jan 14, 2016 at 3:30 PM, SamyGo govoiper@gmail.com wrote:

...

Hi, Yes thats possible as I think you can do a search in SDP body for "video" if found then select the rtpproxy instance else select other one.

Regards, Sammy On Jan 14, 2016 06:39, "Koray Vatansever" koray.vatansever@gmail.com wrote:

...

Hi everybody,

Is there a way to use different rtpproxies for different media types? I want to use one rtpproxy set for audio, and use another one for video. Is this possible in kamailio?

Regards, Koray

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