[Freeswitch-users] Codec problem, Freeswitch does not regard absolute_codec_string?

[Dragos Oancea]

maybe the comments on this issue will help:
https://github.com/signalwire/freeswitch/issues/1340 .

On Wed, Oct 27, 2021 at 8:13 PM Rahman Duran <rahman.duran at erzurum.edu.tr>
wrote:

> Hi,
>
> I am struggling tuning Freeswitch for late codec negotiation. Here is
> local profile settings:
>
> <param name="inbound-late-negotiation" value="true"/>
> <param name="inbound-codec-prefs" value="G722,PCMA"/>
> <param name="outbound-codec-prefs" value="G722,PCMA"/>
> <param name="inbound-codec-negotiation" value="greedy"/>
>
> As you see I enabled late-negotiation and set codecs prefs to allow G722
> and PCMA. My goal is to use G722 if both sides support it and fall back to
> PCMA if G722 is not an option for A leg or B leg.
>
> Here is the local dial plan config where I bridge calls:
>
>     <extension name="local_accounts_freeswitch">
>       <condition regex="all">
>         <regex field="destination_number" expression="^[0-9]{4}$"/>
>         <regex field="${local_user_exists}"
> expression="^true$|^TRUE$|^True$"/>
>         <regex field="${santral_kontrol}" expression="^freeswitch$"/>
>         <action application="set" inline="true"
> data="call_pickup_group=${user_data(${destination_number}@${domain_name}
> var call_pickup_group)}"/>
>         <action application="hash"
> data="insert/${domain_name}-last_dial/${caller_id_number}/${destination_number}"/>
>         <action application="hash"
> data="insert/${domain_name}-group_pickup_last_uuid/${call_pickup_group}/${uuid}"/>
>         <action application="hash"
> data="insert/${domain_name}-pickup_last_uuid/${destination_number}/${uuid}"/>
>         <action application="log" data="ep_codec_string --
> ${ep_codec_string}" />
>         <action application="set" data="inherit_codec=true"/>
>         <action application="export"
> data="nolocal:absolute_codec_string='${ep_codec_string}'"/>
>         <action application="set_profile_var"
> data="callee_id_name=${user_data(${destination_number}@${domain_name} var
> effective_caller_id_name)}"/>
>         <action application="set" data="hangup_after_bridge=true"/>
>         <action application="set" data="continue_on_fail=true"/>
>         <action application="set" data="call_timeout=30"/>
>         <action application="set" data="execute_on_answer=sched_hangup
> +21600 alloted_timeout" />
>         <action application="bridge"
> data="{origination_callee_id_name=${user_data(${destination_number}@${domain_name}
> var effective_caller_id_name)}}user/${destination_number}@
> ${domain_name}"/>
>         <action application="execute_extension"
> data="hata-${originate_disposition} XML hata_anonslari"/>
>       </condition>
>     </extension>
>
> So I export absolute_codec_string to B leg using ep_codec_string. When I
> test a call from 2730->2110, the call fails with
> "incompetible_destination".  Call logs here:
> https://pastebin.freeswitch.org/view/b2978e79 The 2730 is a Cisco phone
> with "G722,PCMU,PCMA,G729,L16,iLBC" codec support. The 2110 is a Samsung
> phone that only supports "PCMA,PCMU,G729" codecs. As you see cisco invites
> with all codecs it supports and freeswitch sets absolute_codec_string with
> "G722,PCMA" as expected from the config. But as you see in the call logs
> Freeswitch only sends "G722" in SDP to Samsung phone so Samsung rejects the
> call.
>
> Why does Freeswitch only send G722? How can I fix this? What am I doing
> wrong?
>
> P.S. using debian packages: FreeSWITCH Version
> 1.10.6-release-18-1ff9d0a60e~64bit (-release-18-1ff9d0a60e 64bit)
>
> Regards,
>
> Rahman Duran
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