No, its not a copy paste error, its showing wrong format in the mailing list. I have the pipe line working in Linux, and same simulation does not work in Windows. The only culprit in Windows for this is as following part example: udpsrc port=4446 caps="application/x-rtp, more=...., more=....," <div class="gmail_quote">On Fri, Apr 15, 2011 at 11:38 PM, Mailing List SVR <<a href="mailto:lists@svrinformatica.it">lists@svrinformatica.it</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Il giorno ven, 15/04/2011 alle 21.42 +0200, gOOGle md ha scritto: > (st ring)SPEEX seems you have some spurious white space is this a copy/paste error? </blockquote></div>