10 Dec
2003
10 Dec
'03
5 p.m.
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@epm.net.co]
Sent: Wednesday, December 10, 2003 3:48 PM
To: Adrian Georgescu; Maxim Sobolev
Cc: serusers(a)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(a)ag-projects.com>
To: "Maxim Sobolev" <sobomax(a)portaone.com>
Cc: <serusers(a)lists.iptel.org>
Sent: Wednesday, December 10, 2003 9:15 AM
Subject: [Serusers] Re: Xten-RTPProxy choppy audio
reported this
Maxim, Xten and
tell where
half second
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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 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 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 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 >> 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(a)jobserver.org
>>>>> Regards,
>>>>> Adrian Georgescu