Wireshark-users: Re: [Wireshark-users] I can not see any significant data with RTP Player
From: Jaap Keuter <[email protected]>
Date: Tue, 10 Jun 2008 09:32:24 +0200

Your email provider still does that, and I don't like it.

If you look carefully at your trace you'll see several things.
1. The codec used for voice is G723. Wireshark doesn't natively support that.
The RTP player doesn't handle that gracefully though.
2. There are RTP events in there, which represent inband signaling of call control. These confuse the RTP analyses somewhat as well.
You better have a look at Statistics|RTP streams if you want accurate details 
on the media. The RTP player can only give you an *impression* of what it 
sounds like, and then only if the applicable codec is available.

Luca Tomasi wrote:
	  	Hi Jaap,
you are right. It wasn't my intention to send the picture which has been included automatically by the server.
I dont' know which is the VoIP client:
I have an hardware application with two equipment communicating through a WAN port. Both are connected to a hub. I sniff the data with wireshark with the PC connected to the hub
I captured the data in this way:
- I started the capture -> I set up the VoIP call -> I talked something --> I closed the call
the data captured is in the attached file


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Jaap Keuter
Sent: lunedì 9 giugno 2008 21.27
To: Community support list for Wireshark
Subject: Re: [Wireshark-users] I can not see any significant data with RTP Player

Can you send plain text emails? I hate it when this list is used as a
commercial distribution channel.

Back to the question. What kind of VoIP client are you using? How do you
capture, and what other party are you connected to? It looks like the RTP is
different than what we expect. Maybe a small capture is possible?


Luca Tomasi wrote:
 > Hi,
 > I am a novice Wireshark user.
 > I captuerd a VoIP data session (I talked on the phone), but when I
 > select Statistics- VoIP calls and then Player on a selected Completed
 > session and then decode, I get Out of seq 3647 (100% ) Drop by Jtter
 > buff : 0% in one direction and
 > 3372 (100%) Drop by Jtter buff : 801 (23,8%) in the other one.
 > So I can not play anything
 > Why? What have I to do to see something?
 > Thanks uin advance
 > Luca