Hi John It sounds likely that there s a failure in caps negotiation with your element. Please run the pipeline like this first: gst-launch-0.10 -v filersc location=file.mp3 ! flump3dec ! alsasink Then copy paste the output in a mail. We should see the caps of the output pad from mp3 decoder. Then do a gst-inspect on your element and copy paste the output. Thanks Best regards <div class="gmail_quote">Le 19 févr. 2013 00:09, "johnwesting" <<a href="mailto:john.blank.westing@gmail.com">john.blank.westing@gmail.com</a>> a écrit : <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Still having this problem. How can flump3dec negotiate the capabilities of the corrupted MP3, but not share the negotiated capabilities with my element? -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Custom-Codec-Having-Trouble-Negotiating-Caps-with-Corrupted-MP3-tp4658403p4658613.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Custom-Codec-Having-Trouble-Negotiating-Caps-with-Corrupted-MP3-tp4658403p4658613.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div>