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Wireshark-dev: Re: [Wireshark-dev] no sound during playback of amr call

From: Anders Broman <anders.broman@xxxxxxxxxxxx>
Date: Thu, 24 Apr 2014 10:57:54 +0000

Hi,

I’m not sure what you are after.

 

To playback an (audio) RTP stream the player must support the codec used. Currently Wireshark does only support playback of G711A/U

(see http://wiki.wireshark.org/RTP_statistics and http://wiki.wireshark.org/VoIP_calls ) you can add codecs to C:\wireshark\plugins\easy_codec or C:\wireshark\codecs

Unfortunately I don’t know the details of doing it. Note that many codecs come with licenses an patents that make it difficult to use them in OpenSource.

 

From “RTP dynamic payload stream(PT_UNDF_96)” I guess that you don’t have the setup information of the RTP stream in your trace and have done decode as RTP. As far as I know currently there is no way to “tell” Wireshark which codec is used for payload type > 96. Perhaps something like that should be added. An UAT table to specify src/dst IP/port and PT = xxx in the RTP dissector perhaps.

Note that in theory Payload type mapping might differ per call. Device A might propose AMR as PT = 96 and device B might use 101.

 

Some payload dissectors allow you to specify which PT they are tied to, check the preferences of the AMR dissector.

Regards

Anders

 

From: wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of Rahul Rohit
Sent: den 24 april 2014 11:31
To: Developer support list for Wireshark
Subject: Re: [Wireshark-dev] no sound during playback of amr call

 

Hi,

Is there any way by which Wireshark be made to support play back for the RTP dynamic payload stream(PT_UNDF_96)by performing any change in the code or Wireshark.

 

Regards

Rahul Rohit

 

 

 

From: wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of Rahul Rohit
Sent: Wednesday, April 23, 2014 1:08 PM
To: Developer support list for Wireshark
Subject: [Wireshark-dev] no sound during playback of amr call

 

Hi,

We are playing back an AMR voice call in Wireshark using telephony option but unfortunately no sound is audible. Could somebody please help us as to what might be the probable reason for this.

 

 

Regards

Rahul Rohit

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