At this point it is time to tell you, dear reader, how I even came to contribute to Phonon – I wanted to write a good looking video player for KDE (using QML for some parts), and came to realize that Phonon does not support QML, so I went on to improve phonon-vlc and eventually ended up as co-maintainer of Phonon itself. So, obvious enough making Phonon work with QML/QtGraphicsScenes is one of the major todos for me right now, I also have a working prototype for the GStreamer backend already

Videos:

• QGraphicsItem powered by Phonon-VLC
• QML player powered by Phonon-GStreamer

http://apachelog.wordpress.com/2010/11/24/phonon-4-4-3-a-magic-glow/