It's a bit difficult to tell (easily) what's baked into the VideoLAN build of x264 and what the changelog is.
For example, an old post on their forum confirmed it outputs raw .h264 rather than .mp4.
Any helpful hint as to where to find info about what those builds contain (eg support for avisynth input) and what it doesn't, would be most appreciated.
edit: I guess changelog is http://git.videolan.org/gitweb.cgi?p...git;a=shortlog