Not 100% accurate, since not all x264 options have ffmpeg equivalents yet.
Patch by Lou Logan.
Originally committed as revision 22144 to svn://svn.ffmpeg.org/ffmpeg/trunk
in ffpreset files.
Patch by Francesco Cosoleto cosoleto -- gmail --dot-- com
Originally committed as revision 15447 to svn://svn.ffmpeg.org/ffmpeg/trunk
* default - x264 CLI default values
* fastfirstpass - disables options unnecessary for first pass
* normal - Dark Shikari’s Q55 preset
* hq - Dark Shikari’s Q75 preset
* max - all options maxed out (at time of writing)
Originally committed as revision 15348 to svn://svn.ffmpeg.org/ffmpeg/trunk