[Freeswitch-users] Set disable-transcoding in dialplan

Thu Sep 3 23:46:14 PDT 2009

rod,

it looks more complicated now when PEER C comes to the picture. i think
we'll have to wait for the availability of g729 on FS, as per Anthony's
post.

/nandy

On Fri, Sep 4, 2009 at 1:54 PM, rod <kawarod at laposte.net> wrote:

> 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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