[Speex-dev] Speex RTP profile

[Alex Bakaev]

Well, the SDP is not used in the payload, only in the
signaling negotiation. In any case, if you control both
ends, just pick a payload number from the dynamic range
and use it.

.a 

-----Original Message-----
From: speex-dev-bounces at xiph.org
[mailto:speex-dev-bounces at xiph.org] On Behalf Of Juan
Zapatero
Sent: Monday, January 23, 2006 1:22 AM
To: Speex-dev at xiph.org; Duane Storey
Subject: RE: [Speex-dev] Speex RTP profile

If I use SDP, or SIP, or H.32x, I would have my total
headers length increased, making it harder to fit payload
and headers all together in the GPRS bandwidth (9.6Kbps).
So I would like, if possible, to avoid using nothing but
RTP/UDP/IP.

Juan.

El vie, 20-01-2006 a las 08:03 -0800, Duane Storey
escribió:
> You generally negotiate the RTP stream via a protocol
like SIP or H.323.
> For SIP, you specify SPEEX in the SDP (session
description protocol) 
> and assign it an arbitrary payload type within the
dynamic range (I 
> think it's
> 96 and above).  Lower numbers are predefined (or
reserved), so you 
> can't use them. Read RFC 2327 about SDP.
> 
> Duane
> 
> -----Original Message-----
> From: speex-dev-bounces at xiph.org
[mailto:speex-dev-bounces at xiph.org] 
> On Behalf Of Juan Zapatero
> Sent: Friday, January 20, 2006 3:26 AM
> To: Speex-dev at xiph.org
> Subject: [Speex-dev] Speex RTP profile
> 
> Hello,
> I am trying to write a simple application to test VoIP
capabilities 
> over a GPRS link. To do such a thing I've used Speex
1.1.11 to capture 
> voice and compress it as much as posible. And now, I am
taking care 
> about the communication process. Because it is supposed
to be a voice 
> application, I need at least the use of RTP to ensure
proper handling 
> of packets over the GPRS network.
> So far, I've been working on RTP client examples, and
I've read the 
> Speex draft too. But still, I don't know how Payload
Type must be 
> specified. In the Speex draft it says 'dynamically
allocated payload 
> type SHOULD be chosen', but I don't understand what
this means.
> 
> Thanks a lot for any tip.
> 
> 
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Gracias por su colaboracion.
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