[Serusers] Re: Xten-RTPProxy choppy audio

Klaus Darilion darilion at ict.tuwien.ac.at
Wed Dec 10 16:00:22 CET 2003 

Ethereal also can do all the analysis: mark an UDP (RTP) packet,
right-click, decode as ... select RTP. Then mark the RTP packet,
->Tools->Statistics->RTP stream->Analyse. There you will see a list of
all RTP packets with jitter/packet loss analysis. Furthermore you can
save the payload to disc and listen to it.

What causes the choppy audio - packet loss or jitter? Is the problem
caused by using X-lite as sender or receiver?

Klaus

> -----Original Message-----
> From: Ricardo Villa [mailto:ricvil at epm.net.co] 
> Sent: Wednesday, December 10, 2003 3:48 PM
> To: Adrian Georgescu; Maxim Sobolev
> Cc: serusers at lists.iptel.org
> Subject: Re: [Serusers] Re: Xten-RTPProxy choppy audio
> 
> 
> Adrian,
> 
> Do you have an Etheral trace trace of such a call (using G711)?  I can
> decode it and produce an audio file for all to examine.  This 
> way we can get
> to the bottom of this.
> 
> Thanks,
> Ricardo
> 
> ----- Original Message ----- 
> From: "Adrian Georgescu" <ag at ag-projects.com>
> To: "Maxim Sobolev" <sobomax at portaone.com>
> Cc: <serusers at lists.iptel.org>
> Sent: Wednesday, December 10, 2003 9:15 AM
> Subject: [Serusers] Re: Xten-RTPProxy choppy audio
> 
> 
> > On Wednesday, Dec 10, 2003, at 14:16 Europe/Amsterdam, Maxim Sobolev
> > wrote:
> >
> > > Probably you need to replace "we have solved" with "we 
> don't observe",
> > > because to say that something is "solved" you probably 
> should be able
> > > to describe what the solution is.
> >
> > 20+ of my customers have experienced a problem in the interaction
> > between xten soft clients and the rtp media proxy. I have 
> reported this
> > to Maxim (3 november),  to xten (6 november) and ser user list  (6
> > november).  I have received no answer, hence the effort we put in
> > finding a solution ourselves.
> >
> > Maxim, I have all respect for all you work.  For the sake 
> of this, here
> > is my correction:
> >
> > "We don't observe this with our media proxy"
> >
> > > Personally I am not convinced that there is actually a 
> real problem
> > > with our RTP proxy (my own tests and Jan's information 
> confirms that),
> >
> > Personally, I am totally convinced that I had a problem and I am am
> > perfectly convinced that I solved my problem. I think this is the
> > single point of arguing here.
> >
> > > it could be just equially likely be the problem with your 
> setup (OS
> > > you are using, libraries, network etc).
> >
> > It is not isolated to my setup. Before I have notified 
> Maxim, Xten and
> > SER user list,  I have reproduced the problem on different 
> operations
> > systems (Windows and MacOSX), different Xten versions, different
> > firewalls (NET Gear, D-Link, Alcatel Speetouch and Linux 
> masquerading)
> > different IP networks and different sip server software.
> >
> > > Therefore, I strongly suggest you to stop asserting that 
> your version
> > > is better
> >
> > I wrote "alternative" version with different features. Nothing about
> > "better". Your software is better :-)
> >
> > > in this respect than original one unless you are able to 
> tell where
> > > the difference is or to provide instructions on how to reliably
> > > reproduce the problem.
> >
> > To reproduce this I start up Xten and make a call via the proxy.
> >
> > > Thanks!
> >
> > Welcome.
> >
> > >
> > > -Maxim
> > >
> > > Adrian Georgescu wrote:
> > >
> > >> The problem is that every few seconds there is a gap of 
> half second
> > >> in  the audio stream (quality-wise the conversation is 
> unacceptable)
> > >> when  using Xten softphone X-lite or X-PRO on either Win 
> or Mac via
> > >> RTPProxy.  I can consistently reproduce this problem 
> 100% on various
> > >> systems and  so do all my customers.
> > >> For the sceptics, there is a movie with the problem presented
> > >> (Quicktime is required to play the stream):
> > >> http://download.dns-hosting.info/SERMediaProxy/
> > >> XtenProblemWithRTPProxy.mov
> > >> and an audio extract:
> > >> http://download.dns-hosting.info/SERMediaProxy/
> > >> XtenProblemWithRTPProxy.wav
> > >> This is the problem solved in our media proxy.
> > >> Regards,
> > >> Adrian
> > >> On Wednesday, Dec 10, 2003, at 11:53 Europe/Amsterdam, Jan Janak
> > >> wrote:
> > >>> I am also wondering what is the problem with xten and rtp proxy,
> > >>> because
> > >>> I didn't have any problems.
> > >>>
> > >>>   Jan.
> > >>>
> > >>> On 10-12 12:29, Maxim Sobolev wrote:
> > >>>
> > >>>> Sorry for my sloppy English, actually I was asking you 
> to explain
> > >>>> the
> > >>>> cause of the problem. If you claim that something was 
> "solved" in
> > >>>> your
> > >>>> version you should probably know how behaviour of your version
> > >>>> differs
> > >>>> from the behaviour of the original one.
> > >>>>
> > >>>> -Maxim
> > >>>>
> > >>>> Adrian Georgescu wrote:
> > >>>>
> > >>>>> See
> > >>>>> 
> http://lists.iptel.org/pipermail/serusers/2003-November/003499.html
> > >>>>>
> > >>>>> On Wednesday, Dec 10, 2003, at 11:07 Europe/Amsterdam, Maxim
> > >>>>> Sobolev  wrote:
> > >>>>>
> > >>>>>> Adrian Georgescu wrote:
> > >>>>>>
> > >>>>>>> Hello, we have released an alternative RTPProxy 
> that works with
> > >>>>>>> SER
> > >>>>>>> nathelper module. Is a completely new program 
> written in Python
> > >>>>>>> and
> > >>>>>>> should be able to run without recompilation on any 
> system where
> > >>>>>>> Python is supported. We have tested Linux Debian  
> and Solaris 8.
> > >>>>>>> There are little differences against PortaOne's 
> rtpproxy, mainly
> > >>>>>>>  the
> > >>>>>>> problem with Xten choppy audio was solved.
> > >>>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>> Interesting. I wonder what was the problem with Xten that you
> > >>>>>> solved?
> > >>>>>>
> > >>>>>> -Maxim
> > >>>>>>
> > >>>>>>> Features
> > >>>>>>> - Compliant with SER nathelper module
> > >>>>>>> - Runs without recompilation on SUN Solaris
> > >>>>>>> - Xten audio quality is perfect  without gaps
> > >>>>>>> - Display active media sessions
> > >>>>>>> - Display traffic in minutes and kilobytes
> > >>>>>>> - Log to syslog the IP/port numbers and traffic 
> statistics per
> > >>>>>>> session
> > >>>>>>> - Flexible design for adding new features
> > >>>>>>> To do list
> > >>>>>>> - Run it on separate machine than SER
> > >>>>>>> - Log network traffic per domain
> > >>>>>>> - Integrate traffic logging with CDRtool
> > >>>>>>> The application is free to download and use without 
> limitations.
> > >>>>>>>  You
> > >>>>>>> can download it from:
> > >>>>>>> http://download.dns-hosting.info/RTPProxy/
> > >>>>>>> The application is developed and supported by AG 
> Projects. Any
> > >>>>>>> feedback is welcome at support at jobserver.org
> > >>>>>>> Regards,
> > >>>>>>> Adrian Georgescu
> > >
> >
> > _______________________________________________
> > Serusers mailing list
> > serusers at lists.iptel.org
> > http://lists.iptel.org/mailman/listinfo/serusers
> >
> >
> 
> 
> 
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