Thank you vmjl , I will figure out what's wrong in OpenMax. So for gst-openmax , it doesn't need to modify in gstomx_base_filter.c pad_chain (). Right? Bard -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/out-flush-in-gst-openmax-tp3066876p3067008.html Sent from the GStreamer-devel mailing list archive at Nabble.com.