[OpenSIPS-Users] sipmsgops and codec_move_up

[Newlin, Ben]

The priority of the codecs is given by their ordering on the “m=audio” line. PCMU is “0” and you can see in the after SDP that “0” has been moved to the front of the list.

The ordering of the “a=rtpmap” lines is not important and does not indicate the preferred codec order.

Ben Newlin

From: <users-bounces at lists.opensips.org> on behalf of Jim DeVito <jim at devito.cc>
Reply-To: "jim at devito.cc" <jim at devito.cc>, OpenSIPS Users Mailling List <users at lists.opensips.org>
Date: Monday, September 19, 2016 at 10:57 AM
To: OpenSIPS Users Mailling List <users at lists.opensips.org>
Subject: [OpenSIPS-Users] sipmsgops and codec_move_up

Hi All.

Just wondering if I am missing something here. using codec_move_up() to
rearrange the offered codecs in the SDP. Here is what I have...

...
codec_move_up("PCMU");
...

However the offered codecs are never re-arranged.

Before...


m=audio 12002 RTP/AVP 18 0 101
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000

And After...

m=audio 12002 RTP/AVP 0 18 101
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000

If I use codec_delete("G729") it works fine.

--
Jim DeVito


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