This is a proof of concept of how to build a QML Qt component that renders h264 1080p video and audio using Raspberry Pi hardware decoder. Also contains code to hardware-decode images to QML components. Notes on the project and on how to build it can be found here: http://thebugfreeblog.blogspot.it/2013/02/qml-components-for-video-decoding-and.html.
In the omxplayeril_backend there is a QtMultimedia backend sample using PiOmxTextures as a shared library. For more information on this refer to: http://thebugfreeblog.blogspot.it/2013/04/hardware-accelerated-qtmultimedia.html.
In tools/POCPlayer there is a sample player used to test the backend.