<html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <div class="moz-cite-prefix">On 2013-11-29 21:18, Frédéric Sallé wrote: </div> <blockquote cite="mid:5298F6AF.5080106@gmail.com" type="cite">gst-launch-1.0 -vvv udpsrc port=11010 caps="application/x-rtp" ! rtpmp4vdepay ! avdec_mpeg4 ! avenc_mpeg4 ! matroskamux ! filesink location=test.mkv </blockquote> Using an mpeg4 parser helps. Here is the sender pipeline: gst-launch-1.0 videotestsrc ! avenc_mpeg4 ! rtpmp4vpay config-interval=1 ! udpsink host=localhost port=11010 And the receiver: gst-launch-1.0 -vvv udpsrc port=11010 caps="application/x-rtp" ! rtpmp4vdepay ! mpeg4videoparse ! matroskamux ! filesink location=misc/test.mkv Note three things: One, you might have to use your machine's IP address instead of localhost. Second, the config-interval property of rtpmp4vpay must be set to a nonzero value (or you need some other way to communicate MPEG4 headers to the receiver). Third, I added the mpeg4videoparse element between the depayloader and matroskamux. cheers </body> </html>