[Freeswitch-users] a=fmtp missing on FS answer

Camila Troncoso ctroncoso at redvoiss.net
Thu Nov 17 21:52:27 MSK 2011


Hello,



I´m having some problems with códec negotiation and one way audio .

I take some Sip captures and  I notice that Freeswitch is not inserting *
fmtp* parameters in SDP in his 200OK response. I notice that this is a
common behavior.

I really need that FS generates the complete SDP (with fmtp) because some
devices only  accept  for example G729 annexb=no.



I tried with the function sip_append_audio_sdp but it only accepts one
a=fmtp line.



“ <tr valign=top>

    <th align="left">

        @RFC3264: SDP Offer/Answer Negotiation

    </th>

    <td>

        Generating and processing offers or answers.

    </td>

    <td>

        - "a=fmtp" parameters are not taken into account

          when generating or processing answer

    </td>

</tr>   ”



Regards,



*Camila Troncoso **|* Ingeniero de Desarrollo

RedVoiss *|*ctroncoso at redvoiss.net

Santiago - Chile *|* +56 2 2408535

www.redvoiss.net
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