The MiX GStreamer elements in emgd-driver-bin aren't as "good" as the open source elements in gstreamer-vaapi. All EMGD-using BSPs should test gstreamer-vaapi and move to that if it works.
The plan is for the EMGD-based machines to disappear in the 1.7 cycle so if this happens, this bug is obsolete.
EMGD machines have been removed from meta-intel.