I resolve this issue with g_signal_connect (id3demux_srcpad, "notify::caps", ...) Thanks! -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/How-can-I-connect-pad-added-signal-to-id3demux-tp4667573p4667593.html Sent from the GStreamer-devel mailing list archive at Nabble.com.