[Freeswitch-users] mod_com_g729 licences used even without transcoding
Anthony Minessale
anthony.minessale at gmail.com
Mon Oct 4 10:34:26 PDT 2010
because it's based on G.711 the original codec used.
It's a balance of latency to packet len.
G.729 is poorly packetized at 20ms with only 10 bytes per payload.
We can do something to make it work the way you want, but then I
refuse to care if you get jittery calls because you are sending the
wrong ptime in both directions.
On Mon, Oct 4, 2010 at 12:18 PM, Jan Riedinger <riedinger at sns.eu> wrote:
> I'm trying to do wholesale business with some dozen of interconnects. It's
> hopeless to force all customers/clients to use the same ptime - and I think
> there is no real reason to force them. I'm already happy, if they all offer
> the usage of g729 ;-). Often they pass through the calls themselves.
>
> BTW - I never understood, why 20 ms is the default frame size. In this way
> you have about 20 bytes payload and 40 bytes overhead for the TCP/IP header,
> which is a pretty bad ratio.
>
> BR
> Jan
>
> Am 04.10.2010 18:56, schrieb David Ponzone:
>
> You could also check with your carrier why they dont accept the custom ptime
> you need, or normalize your customers' config.
> I have a nice extension I made that denies calls if ptime is not 20ms, with
> early-neg or late-neg:
> <extension name="check-ptime" continue="true">
> <condition field="${sip_use_codec_ptime}" expression="20"
> break="on-true"/>
> <condition field="${ep_codec_string}" expression="@20i">
> <anti-action application="respond" data="488"/>
> <anti-action application="hangup" data="88"/>
> </condition>
> </extension>
> David Ponzone Direction Technique
> email: david.ponzone at ipeva.fr
> tel: 01 74 03 18 97
> gsm: 06 66 98 76 34
> Service Client IP eva
> tel: 0811 46 26 26
> www.ipeva.fr - www.ipeva-studio.com
> Ce message et toutes les pièces jointes sont confidentiels et établis à
> l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
> non autorisée est interdite. Tout message électronique est susceptible
> d'altération. IPeva décline toute responsabilité au titre de ce message s'il
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> message, merci de le détruire immédiatement et d'avertir l'expéditeur.
>
>
>
> Le 04/10/2010 à 18:11, Jan Riedinger a écrit :
>
> I think, it would be a could idea to make it configurable, if mod_com_g729
> shall decode/encode the stream to re-packetize. With the current behaviour
> its usage is too expensive for me in respect of money needed for licences
> and CPU power. Most of my calls are calls are g729 to g729, transcodeding is
> needed only very rare.
>
>
>
> Am 04.10.2010 17:46, schrieb David Ponzone:
>
> I just discovered a situation like that.
> If the ptime of leg A and leg B does not match, FS will decode/encode the
> stream in order to re-packetize (despite the fact that mod_com_g729 is
> capable to re-packetize even without any license installed).
> I was thinking that it was not optimal, but Anthony explained some minutes
> ago on #freeswitch why this was the preferred behaviour, despite the quality
> loss it causes.
> David Ponzone Direction Technique
> email: david.ponzone at ipeva.fr
> tel: 01 74 03 18 97
> gsm: 06 66 98 76 34
> Service Client IP eva
> tel: 0811 46 26 26
> www.ipeva.fr - www.ipeva-studio.com
> Ce message et toutes les pièces jointes sont confidentiels et établis à
> l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
> non autorisée est interdite. Tout message électronique est susceptible
> d'altération. IPeva décline toute responsabilité au titre de ce message s'il
> a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce
> message, merci de le détruire immédiatement et d'avertir l'expéditeur.
>
>
>
> Le 04/10/2010 à 17:20, Jan Riedinger a écrit :
>
> Using http://files.freeswitch.org/g729/fsg729-158-installer really did
> fix the issue described below.
>
> However, it seems that the licence is used (up), even if there is no
> transcoding needed. In my CDR I find for all calls, for which G729 is
> involed at all,
>
> read_codec="G729", read_rate="8000", write_codec="G729", write_rate="8000"
>
> Nevertheless, all of these calls use a G729 licence. Is there any way to
> find out, why mod_com_g729 wants to do any kind of transcoding?
>
> BR
> Jan
>
> now the cod
>
> Am 04.10.2010 15:15, schrieb Brian West:
>
> http://files.freeswitch.org/g729/fsg729-158-installer
>
> Just the CDN doesn't have the index updated yet. That will fix your issue.
>
> /b
>
> On Oct 4, 2010, at 8:09 AM, David Ponzone wrote:
>
> Nope, you have to install them manually.
>
> Current is v158.
>
> You can download it from the same place than 153, but via direct URL only.
>
> It's still Beta I think.
>
> David Ponzone Direction Technique
>
> email: david.ponzone at ipeva.fr
>
> tel: 01 74 03 18 97
>
> gsm: 06 66 98 76 34
>
> Service Client IPeva
>
> tel: 0811 46 26 26
>
> www.ipeva.fr - www.ipeva-studio.com
>
> Ce message et toutes les pièces jointes sont confidentiels et établis à
> l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
> non autorisée est interdite. Tout message électronique est susceptible
> d'altération. IPeva décline toute responsabilité au titre de ce message s'il
> a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce
> message, merci de le détruire immédiatement et d'avertir l'expéditeur.
>
>
>
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> --
> Jan Riedinger Phone : +49-30-39 73 19 66
> Dipl.-Inf. | Managing Director Fax : +49-30-39 73 19 64
> E-Mail: riedinger at sns.eu
> SNS Consult GmbH ICQ : 163-237-041
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> 14197 Berlin GERMANY Skype : Jan Riedinger
>
> AG Charlottenburg - HRB 71973
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> --
> Jan Riedinger Phone : +49-30-39 73 19 66
> Dipl.-Inf. | Managing Director Fax : +49-30-39 73 19 64
> E-Mail: riedinger at sns.eu
> SNS Consult GmbH ICQ : 163-237-041
> Südwestkorso 49a MSN : jan at sns-consult.de
> 14197 Berlin GERMANY Skype : Jan Riedinger
>
> AG Charlottenburg - HRB 71973
>
>
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> --
> Jan Riedinger Phone : +49-30-39 73 19 66
> Dipl.-Inf. | Managing Director Fax : +49-30-39 73 19 64
> E-Mail: riedinger at sns.eu
> SNS Consult GmbH ICQ : 163-237-041
> Südwestkorso 49a MSN : jan at sns-consult.de
> 14197 Berlin GERMANY Skype : Jan Riedinger
>
> AG Charlottenburg - HRB 71973
>
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--
Anthony Minessale II
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