In particular I'm missing gst-plugins-x264, it's not pulled in no matter which USE flags I try.
Fixed, thanks for reporting. +*gst-plugins-meta-1.0-r1 (06 Jan 2013) +*gst-plugins-meta-0.10-r8 (06 Jan 2013) + + 06 Jan 2013; Alexandre Rostovtsev <tetromino@gentoo.org> + +gst-plugins-meta-0.10-r8.ebuild, +gst-plugins-meta-1.0-r1.ebuild, + metadata.xml: + Add cdda, jack, libass, opus, x264, xvid USE flags that users have been + requesting (bugs #412183, #422637, #442566, #450332). Drop alpha, arm, hppa, + ia64, ppc, ppc64, sparc, amd64-fbsd keywords due to new dependencies.