RE: [Iaxclient-devel] codec support

[Mark S. <mar...@di...>]

> 2.  How to negotiate codecs over IAX2

This part I can actually comment on.  Whereas SDP based systems list
codecs in the order desired, IAX2 has a simpler (but arguably less
flexible) system for doing the codec negotiation, which is that the caller
specifies two things -- a preferred format and a mask of its capability.
Then the server being called responds back with a specific format it
wishes to use.  In principle, you can switch codecs to anything that is
within the end device's capability.

> I wonder if there is a way to create a commercial G.729 plug-in that can be
> sold via Digium?  If we have a common codec interface that is common across
> all clients, couldn't we create a standard binary dynamic link format for
> each platform (x-nix, Windows, Mac) and ask Digium to sell the plug-ins?

We could look at this as a possibility, but I need to find a new G.729
provider first, as Voiceage's code is basically crap (in particular their
brain-dead copy protection), and they are absolutely most miserable,
untrustworthy, and irresponsible company i've ever had to deal with, so
the last thing I want to do is create another product involving them.

Mark