There are now two x264-svn ebuilds in ~arch :
media-libs/x264-svn : this one installs the library, headers and pkgconfig files needed by the other packages (for ex. ffmpeg)
media-video/x264-svn-encoder : x264 encoder that was previously installed with x264-svn and a gtk use flag with which you can install a gtk frontend to this encoder.
Why that ? Eh, let’s have a look at it :
– x264 encoder can use gpac for mp4 output
– gpac can use ffmpeg
– ffmpeg can use x264 libs
If you want all of these features, then you hit a circular dependency problem.
Moreover, previously if you wanted to install x264 gtk frontend then libx264.so would have been linked to x11… why ? I don’t know, it’s not needed. Now this is no longer a problem since they are different packages.