Perfect answer :) gst_base_src_set_format (GST_BASE_SRC(self), GST_FORMAT_TIME); in shmsrc.c does the trick :) Thx -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/Segment-problem-with-shmsrc-videomixer-tp4663133p4663167.html Sent from the GStreamer-devel mailing list archive at Nabble.com.