[SIPForum-discussion] Extract Audio from a Trace

[Kaushal Mehta]

Keyur,

 

The following works for g711 but you can give it a try for g729. 

 

Steps to Create Audio File

1.          Open capture file in Ethereal

2.         Left click on udp packets and convert a stream to RTP.  Look
for packet into msw from ingress and then out of msw to egress.  Also
locate packets in the opposite direction and convert them to RTP.

3.         Identify all RTP streams in trace:  Analyze ---> Statistics
---> RTP Streams ---> Show All and hit enter

4.         Follow instructions on screen by selecting forward stream
(left click) and reverse stream (hold shift key down and left click
stream).  Notice how it selected the streams.

5.         Click Analyse button on screen.  Make sure the streams are
selected or nothing will happen.  Now click Save Payload button and it
will give you a screen to create the audio file.  Give the file a name
and with the extension .au.

6.         Bring up the file with file manager and double click the
file.  It will start your media player and play the file.

 

Kaushal 

 

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Keyur Amin
Sent: Thursday, August 24, 2006 1:05 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] Extract Audio from a Trace

 

Hello All,

 

Does any one know how to extract audio from an Ethereal trace file with
G729?

 

Thanks,

Keyur

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