[Freeswitch-users] Set disable-transcoding in dialplan

[rod]

Hi Nandy,

yes already tried this, but if I use proxy_media=true, FS makes no 
control on the content of the RTP stream. But the pbm is that I need to 
use this:
http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_start_dtmf_generate
This function enables transcoding of SIP_INFO or RFC2833 to Inband DTMF 
in G711

But this feature doesn't work if I'm using proxy_media=true.

In fact my setup is the following:

CPE using G711A, G729 and SIP INFO for DTMF
PEER_A using G729 only and RFC_2833
PEER_B using G711 and SIP INFO

I have been able to make this works, with proxy_media=true for PEER_B 
cause I don't need transcoding of DTMF (SIP INFO to SIP INFO).
For PEER_A, proxy_media is set to false (default) cause  I need 
transcoding SIP INFO to RFC2833. I'm able to use G729 using 
codec_negotiation=greedy and setting G729 with highest priority on my 
internal profile.

But the pbm is that I need to add PEER_C.
PEER_C needs G711 with transcoding DTMF from SIP_INFO to Inband.

And this is where I'm stuck, cause using "greedy settings and G729 with 
priority 1 in my codec list and proxy_media=false" force FS to negotiate 
G729 on leg A. But Leg B is willing to use G711 and FS is unable to 
transcode G729 <---> G711.

I was wondering if there is a way for FS to force the codec order on Leg 
A with some knowledge of the preferred codec on Leg B, ie I know that 
Leg B will always use G711 so that I want to biase the SDP answer on Leg 
A based on this fact.

regards,
rod

Nandy Dagondon a écrit :
> rod,
>
> have you tried this? 
> http://lists.freeswitch.org/pipermail/freeswitch-users/2008-March/002199.html
>
> /nandy
>
>
> On Thu, Sep 3, 2009 at 2:50 PM, rod <kawarod at laposte.net 
> <mailto:kawarod at laposte.net>> wrote:
>
>     Hi Michael,
>
>     I did some tests but I haven't been successful, so there is what I'm
>     trying to achieve:
>
>     On A leg, my phone is using: PCMA and G729 (in this priority order)
>
>     With PEER A, I want to use only G729 (thats is the only codec that
>     this
>     PEER support), so that the RTP flow will be:
>        Phone-----G729----FS-----G729-----PEER_A
>
>     With PEER B, I want to use only G711, so:
>        Phone-----G711----FS-----G711-----PEER_B
>
>     In fact, I'd like to force FS announcing the codec list priority based
>     on the priority of the codec announced by the PEER, cause FS is unable
>     to transcode G729 <--> G711.
>
>     Tried a lot of things (greedy for codec-negociation, late_codec,
>     disable_transcoding, codec-prefs) without success.
>
>     If you have some clue.
>
>     regards,
>     rod
>
>     Michael Collins a écrit :
>     > Check out this page:
>     > http://wiki.freeswitch.org/wiki/Codec_negotiation
>     >
>     > Late negotiation will probably let you handle all the cases you
>     need.
>     > -MC
>     >
>     > On Mon, Aug 31, 2009 at 8:00 AM, rod <kawarod at laposte.net
>     <mailto:kawarod at laposte.net>
>     > <mailto:kawarod at laposte.net <mailto:kawarod at laposte.net>>> wrote:
>     >
>     >     Hi all,
>     >
>     >     I'm wondering if I can do something like this:
>     >        - in my internal profile, I have this because of some PEER
>     >     using G729:
>     >              - <param name="disable-transcoding" value="true"/>
>     >
>     >     But for a specific PEER, I'd like to activate transcoding:
>     >              - for this PEER, only G711 is used
>     >              - I'd like to transcode DTMF SIP INFO or RFC2833 to
>     INBAND
>     >
>     >     So in my dialplan, I tried before bridging:
>     >
>     >        - <action application="set"
>     data="disable-transcoding=false"/>
>     >        - <action application="start_dtmf_generate" data="true"/>
>     >
>     >     But I still see RFC2833 events between my FS and PEER and
>     the DTMF are
>     >     not working.
>     >
>     >     So 2 questions:
>     >        - does application "start_dtmf_generate" requires transcoding
>     >        - if yes, can I set the variable disable-transcoding in
>     my dialplan
>     >
>     >     regards,
>     >     rod
>     >
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