Hi, I would like to test to suggest test pipelines from the gstreamer online documentation : <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-udpsrc.html">http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-udpsrc.html</a> There is no error or crash but nothing happens: On the same computer, in a first console: gst-launch-0.10 -v udpsrc ! fakesink dump=1 Setting pipeline to PAUSED ... (a popup said me that I can open the port used by the udpsrc, so I did it) in a second console: C:\Documents and Settings\Administrateur>gst-launch-0.10 -v audiotestsrc ! udpsink Setting pipeline to PAUSED ... /pipeline0/audiotestsrc0.src: caps = audio/x-raw-int, endianness=(int)1234, signed=(boolean)true, width=(int)16, depth=(int)16, rate=(int)44100, channels=(int)1 Pipeline is PREROLLING ... /pipeline0/udpsink0.sink: caps = audio/x-raw-int, endianness=(int)1234, signed=(boolean)true, width=(int)16, depth=(int)16, rate=(int)44100, channels=(int)1 Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstSystemClock I am using windows packages : gst-plugins-good-0.10.7.win32 from 09-mars-2008 Sincerely Julien