For the sdp cleanup purpose ( if possibilities of rrpengine are not enough) I use the next technic:
- Set up write_avp param for the rtpengine module
- call rtpengine manage: handled sdp will be then posted to write_avp pvar.
- use lua/python/etc to call via lua_run(...) (this is for lua )
- handle value of write_avp there 
- apply the value to body of the message.

On Mon, 16 Oct 2023, 18:11 Yuriy G, <ovoshlook@gmail.com> wrote:
 They actually aren't for the udp leg

On Mon, 16 Oct 2023, 18:09 Mirko Brankovic via sr-users, <sr-users@lists.kamailio.org> wrote:
I'm maybe out of context here but i don't think you can remove ssrc headers from sdp since they are crucial in identification of the rtp streams

On Mon, Oct 16, 2023, 14:41 Social Boh via sr-users <sr-users@lists.kamailio.org> wrote:

Hello,

in the rtpengine LOG i can see:

Oct 16 06:32:53 sip1 rtpengine[146001]: DEBUG: [28vs0pbtdtu7udefti8m]: ... ": [ "sdp-attr-remove-audio-ssrc::" ], "replace": [ "origin", "session-connection" ], "transport-protocol": "RTP/AVP", "rtcp-mux": [ "demux" ], "SDES": [ "off" ], "call-id": "28vs0pbtdtu7udefti8m", "via-branch": "z9hG4bK4978560", "received-from": [ "IP4", "186.98.231.105" ], "from-tag": "h8l2da68sp", "command": "offer" }

but the ssrc lines still presents in the INVITE sent to sip device.

Regards

---
I'm SoCIaL, MayBe
El 14/10/2023 a las 12:39 p. m., Social Boh via sr-users escribió:
Hello,

I'm trying to using sdp-attr without luck:

sdp-attr-remove-audio-ssrc:

in this sentence:

$xavp(r=>$T_branch_idx) = $xavp(r=>$T_branch_idx) + " rtcp-mux-demux DTLS=off SDES-off ICE=remove RTP/AVP sdp-attr-remove-audio-ssrc:";

this to remove two ssrc lines

Regards

---
I'm SoCIaL, MayBe

El 14/10/2023 a las 11:12 a. m., Richard Fuchs via sr-users escribió:
On 14/10/2023 02.46, [EXT] Karsten Horsmann via sr-users wrote:
Hi,

did you pass over the ice stuff from webrtc to the udp side? You could strip that of with rtpengine options.

With recent versions we even have explicit SDP manipulations options, so you can use rtpengine to strip attributes that it itself doesn't understand or process.

Cheers

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