[Ekiga-list] [OpenH323]Re: Receiving SIP RTP before media description [was ekiga answers with delay ...?]

[Damien Sandras]

Le dimanche 26 novembre 2006 à 23:26 +1100, Craig Southeren a écrit :
> On Sun, 26 Nov 2006 12:14:29 +0100
> Julien Puydt <jpuydt at free.fr> wrote:
> 
> ..deleted
> 
> > Here is how gstreamer does, as far as I know : they get the data and 
> > feed it to their codecs, which return something which measures their 
> > confidente it is "correct data" for them.
> > 
> > So by elimination, they get the right codec, which can then be confirmed 
> > and better tuned afterwards.
> 
> This sounds like it could require a lot of resources. 
> 
> Imagine a mobile device that has only limited CPU and supports a wide
> variety of audio and video codecs. Pushing every received RTP packet
> through every offered codec in order to find one that seems to works
> would require a lot of extra code to be written, and would require a lot
> of extra CPU. And it still doesn't address the other issues I described.
> 
> I think there some other issue at work here.
> 
> Can someone provide me with a trace log of a call that has the "three
> second delay"? I'm thinking that perhaps the remote end is sending a 183
> with media session information, but for some reason OPAL is not
> processing the media until the 200 OK is received.
> 

That's not the case. Asterisk just sends audio immediately after it
received the initial INVITE. Just call any echo machine on the net and
you will see the behavior.

> But until I get a level 4 trace, I won't know for sure...
> 
>    Craig
> 
> 
> -----------------------------------------------------------------------
>  Craig Southeren          Post Increment – VoIP Consulting and Software
>  craigs at postincrement.com.au                   www.postincrement.com.au
> 
>  Phone:  +61 243654666      ICQ: #86852844
>  Fax:    +61 243656905      MSN: craig_southeren at hotmail.com
>  Mobile: +61 417231046      Jabber: craigs at jabber.org
> 
>  "It takes a man to suffer ignorance and smile.
>   Be yourself, no matter what they say."   Sting
> 
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-- 
 _      Damien Sandras
(o-     
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