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

[Simon MORLAT]

John A. Sullivan III wrote:

> On Thu, 2004-09-16 at 08:18, Simon MORLAT wrote:
> <snip>
>  
>
> > 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?
>  
If  you are using the alsa driver, then i810 is full duplex. This card 
is a good one (I have 3 on different pcs, all work fine with linphone).
If you are using the old oss driver, there are problems.

> <snip>
>