Speex dev - Jun 2008 - Enabling Speex VBR for VoIP

I have two questions:

1. ?I would like to enable VBR with the Speex codec for VoIP 
communications. Is this setting made within VoIP clients themselves or 
is it a setting that must be changed on the specific version of Speex 
(for example, via command line)?

2. If not, is there any way to create RTP packets via the Speex command 
line? (The goal is to view the lengths of the packets created by VBR 
encoding.)

Thanks in advance!

-Rachel
rdl5u at cs.virginia.edu

Rachel Lathbury a ?crit :
> I have two questions:
> 
> 1. ?I would like to enable VBR with the Speex codec for VoIP 
> communications. Is this setting made within VoIP clients themselves or 
> is it a setting that must be changed on the specific version of Speex 
> (for example, via command line)?
See the SPEEX_SET_VBR and SPEEX_SET_VBR_QUALITY options. But be aware
that unless you're aggregating many VoIP calls on the same link, there's
little use for VBR in VoIP.
> 2. If not, is there any way to create RTP packets via the Speex command 
> line? (The goal is to view the lengths of the packets created by VBR 
> encoding.)
You cannot create RTP packets from speexenc. If you only want to see the
length, you can either use the -V option, or encode to Ogg and use
oggzdump to inspect packets.

Cheers,

	Jean-Marc