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
> Email: greg.hor...@dialogic.com <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 SouthwarkBridge
> 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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