"avwait-status" is posted when avwait starts or stops passing through data (e.g. because target-timecode and end-timecode respectively have been reached). The attached structure includes a "dropping" boolean (set to TRUE if we are currently dropping data, FALSE otherwise), and a "running-time" GST_CLOCK_TIME which contains the running time of the change. https://bugzilla.gnome.org/show_bug.cgi?id=790170