Qt 5.5 GStreamer integration

Is there any documentation/example on the newly integrated GStreamer multimedia plugin in Qt 5.5? How one would go about building a pipeline? The ultimate goal is to use in QtQuick but the question is in general. I've looked everywhere and there is nothing I could find other than ancient references to the old QtGStreamer/QtGStreamerQuick bindings. The examples in the multimedia module haven't really changed from 5.4.x and there is no reference to gst.

Thanks!

Apparently the feature is so obscure no one knows about it. It's out in Beta but there is no documentation on how to use it. I just need to know how to build an input pipeline and have it fed to QtQuick view.