Now that bug #489816 has been fixed for good and we have multilib ffmpeg in tree, the ebuild for emul-linux-x86-medialibs must be fixed, because media-video/ffmpeg already includes the libpostproc libreary, and it can't be installed alongside media-libs/libpostproc. If I get ebuild syntax correct it should be something like: || (>=media-libs/libpostproc-10.20140517-r1 >=media-video/ffmpeg-2.2.3-r1)
Thanks for the report. + 12 Jun 2014; Michał Górny <mgorny@gentoo.org> + emul-linux-x86-medialibs-20140508-r6.ebuild: + Support both ffmpeg & libpostproc as libpostproc provider, bug #513026. However, we may need to revisit this as I'm not sure if portage will get the virtual + || () correctly, and won't try to pull in both libav & ffmpeg at the same time.
Reopening. Either -r6 should be unmasked, or this should be fixed in -r5 too.
+ 13 Jun 2014; Michał Górny <mgorny@gentoo.org> + emul-linux-x86-medialibs-20140508-r5.ebuild: + Backport the ffmpeg/libav dependency fix from -r6.