<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/4.6.6"> </HEAD> <BODY> Le jeudi 17 octobre 2013 à 17:18 -0700, yoyosuper8 a écrit : <BLOCKQUOTE TYPE=CITE> "( videotestsrc is-live=true do-timestamp=true ! video/x-h264, width=480,height=640,framerate=30/1 </BLOCKQUOTE> With this line you are asking videotestsrc to produce H264 encoded stream, which is not possible. I think you meant video/x-raw instead. cheers, Nicolas </BODY> </HTML>