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Re: [Linphone-users] Sync problem with Asterisk??

From: John A. Sullivan III
Subject: Re: [Linphone-users] Sync problem with Asterisk??
Date: Thu, 16 Sep 2004 11:19:39 -0400

On Thu, 2004-09-16 at 08:18, Simon MORLAT wrote:
> I think there is a problem with speex in 0.12.2. The version embedded in 
> linphone tarball is not compatible with the way linphone use it (hum). 
> So may want to recompile and install the lastest version of speex, then 
> recompile linphone so that it use the installed version instead of the 
> embedded one.
Thanks.  I'll give it a try.
> <snip>

> All those messages are normal; but I can see something interesting with 
> the RTP stats at the end:
> packet_sent=10328
> packet_recv=6564
> Linphone has received less packets than he has sent. In a full duplex voip 
> session with same codecs in both direction (like it is usually the case), 
> this is not normal. It means that packet output rate from asterisk is too 
> low. Normally, asterisk should output 8000 samples/second, so 8000 
> bytes/second, for example 50 packets/s with 20ms (160bytes) of audio in each 
> packet.
> This gives you some ideas to dig...
> Simon
Thank you very much for pointing that out. I will start digging.  I
believe my sound card is only half duplex (Intel i810).  Would that
produce this kind of result?
John A. Sullivan III
Open Source Development Corporation
Financially sustainable open source development

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