[App_rpt-users] Codecs

[Tim Sawyer]

I believe the receive side of the connection determines the codec. You
can't force it on the other end.

Do you have a [radio] stanza in one of your node? Maybe that's where iLBC
is.

On Mon, Mar 6, 2017 at 4:52 PM, Benjamin L. Naber <benjamin at project23d.com>
wrote:

> While reading an email from another VoIP email reflector, I got to
> thinking about some of the codecs we use.
>
> Perusing through the iax.conf through a few allstar network linking
> distros, each seem to have their own preferred set of codecs.
>
> I'm rather disturbed that iLBC and speex remains in any of them, while I'm
> sure for compatibility of older installations. However, low quality
> bandwidth codes sounds no better than echo-stink. This is one of the reason
> why we use Allstarlink, for better audio quality, is it not?
>
> As I connect to different allstar nodes throughout the world, more-so in
> the US, some are using iLBC or gsm... and a majority are hub nodes. This to
> me, is unacceptable, and appears the codec being used are whatever the
> allstar box has been packaged with.
>
> So, given than I'm not a Steve Henke or Steve Zingman, but I want to
> ensure that I'm doing my part to achieve high fidelity through g711 codec
> and proper URI <-> radio hardware interfacing techniques.
>
> Which stanza in the iax.conf is for out-going connections?
>
> I was under the impression [radio-proxy] was, however, when a node with:
> disallow=all
> allow=ulaw
> allow=g726aal2
> allow=gsm
>
> connects to my node which has the *same* key=value pairs under [radio]
> stanza, I got the message something along the lines of:
>
> connected: IP
> codes available: g726aal2/gsm
> host codecs available: ulaw|g726aal2|gsm|ilbc
> actual codec: g726aal
> ...
>
> bost sides do not have ilbc *anywhere*. The codec has been
> removed/deleted. Why does it still show up?
>
> What is the ultimate deciding factor of which codec is used if both side
> have codecpriority=mine?
>
> ~Benjamin, KB9LFZ
>
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-- 
--
Tim
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