There is a big difference between having SIPp play a .pcap file where it does
not have to care about the voice data contents of the outgoing RTP packets vs.
having SIPp decode the possibly compressed voice data in incoming RTP packets
and play them out in an audio stream that you can listen to. Maybe someday for
Wireshark or SIPp somebody may develop a plugin that can immediately stream
decoded RTP data out through system audio drivers so you can listen in
real-time. Until then I'd agree that the best solution is to capture streams
in Wireshark then use that program's tools to either play directly from a
capture buffer or save to external .au or .raw format and play with another
program. G711 is best for that but there is also a G729 decoder available that
can be matched up with Wireshark traces. It's really not that laborious once
you do it a few times.
Greg Horton
Embedded Software Engineer
Dialogic Research Inc.
75 Perseverance Way
Hyannis, MA 02601 USA
Tel: 508 862 3591
Email: greg.hor...@dialogic.com<mailto:briane.ritc...@dialogic.com>
Web: www.dialogic.com<http://www.dialogic.com>
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From: Alexander, Andy (Andy) **CTR** [mailto:aa...@avaya.com]
Sent: Thursday, November 03, 2011 7:11 AM
To: James Van Vleet
Cc: sipp-users@lists.sourceforge.net
Subject: Re: [Sipp-users] Is it possible to play received RTP packets?
James,
Thanks for the suggestion however this is quite laborious, is not real time and
only works when the RTP stream is encoded using G.711.
I just wondered if there was any way to play the received RTP packets via a
SIPp function or if there was a Media application that I could run on the PC
and integrate with SIPp that would allow me to listen to the received RTP
packets in real time - as I can in the other direction with the SIPp
"Play_pcap_audio" function.
Andy Alexander | Engineering Field Support | Avaya | Wentworth Lodge | Suite 3
| Great North Road | Welwyn Garden City | Hertfordshire | AL8 7SR
Registered in England - 04965442 | Luxoft UK | 64 Southwark Bridge Road |
London | SE1 0AS
________________________________
From: James Van Vleet [mailto:ja...@bolderthinking.com]
Sent: 01 November 2011 19:49
To: Alexander, Andy (Andy) **CTR**
Cc: sipp-users@lists.sourceforge.net
Subject: Re: [Sipp-users] Is it possible to play received RTP packets?
Assuming the media is g.711 you might want to just run wireshark
(http://www.wireshark.org/) on the sipp box, capture the packets and play them
using wireshark's decoder.
-James
On Tue, Nov 1, 2011 at 2:18 PM, Alexander, Andy (Andy) **CTR**
<aa...@avaya.com<mailto:aa...@avaya.com>> wrote:
Hi,
Sorry if this is a silly question but I have just started to use SIPp to try to
simulate PBX problems from customer sites that use our equipment.
Is it possible to play the received RTP packets through the PC speakers when
simulating a SIP connection with a SIPp script?
I have managed to send RTP packets to the remote device (via "play_pcap_audio")
and can get the audio to come out of the phone that initiated the call to my PC
running my SIPp script.
But how do I get the audio (RTP packets) from the phone to come out of the PC
speaker?
I found references to "RTSP/RTP DirectShow Filters" which seems to imply that
you need to build the application for the desired platform from the supplied
code.
Is there a "Media" Application that I can run on my Windows PC that will play
the received RTP packets but still allow my SIPp script to run?
Sorry I am a technical support engineer and not a software engineer.
I use Windows not Linux.
Andy Alexander | Engineering Field Support | Avaya | Wentworth Lodge | Suite 3
| Great North Road | Welwyn Garden City | Hertfordshire | AL8 7SR
Registered in England - 04965442 | Luxoft UK | 64 Southwark Bridge Road |
London | SE1 0AS
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