I have gstreamer-0.10.3/gst-plugins-bad-0.10.0 installed. Testing totem-1.3.91 with gstreamer 0.10, I ran into an error indicating it couldn't find gst-plugins-faad. Looking into the gst-plugins-bad eclass, it looks like none of the 0.10 plugins listed there are available in Gentoo. I haven't checked the rest of the gst-plugins-* eclasses to see if there are other missing plugins. I'm not asking for support with a testing version of totem, but if Gentoo is making this framework available for testing it would be useful to have the whole framework.
the ones that we deem stable are in