Ok, so some more 770 work done today. We solved the issue keeping Real video from working with some nice fixes both to the realvideo plugin and to sdlvideosink. Both sdlvideosink and ximagesink works on the 770 I have now discovered using gstreamer 0.9 CVS.
Edgard did some great work adding fullscreen support to the sdlvideosink so that we hopefully at some point can do fullscreen videoplayback on the 770 using sdl.
Some issues did pop up though, like our need to get the quality of service framework implemented for 0.9/0.10 so we can properly start dropping frames when the CPU limit is hit. Luckily getting that in place is planned for the next few months.