Many thanks guys - looks like I'll just have to use WireShark to
"playback" the received RTP.
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: 03 November 2011 13:03
To: Greg Horton
Cc: Alexander, Andy (Andy) **CTR**; sipp-users@lists.sourceforge.net
Subject: Re: [Sipp-users] Is it possible to play received RTP packets?
Yep. What he said. Sipp as far as I know has no real idea this is RTP
- it is just streaming out the contents of a packet capture. The
amount of coding to pull off what you describe would be major,
especially cross platform.
-James
On Thu, Nov 3, 2011 at 7:46 AM, Greg Horton <greg.hor...@dialogic.com>
wrote:
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 <tel:508%20862%203591>
Email: greg.hor...@dialogic.com <mailto:briane.ritc...@dialogic.com>
Web: www.dialogic.com
This e-mail is intended only for the named recipient(s) and may contain
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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> 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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