Originally committed as revision 23879 to svn://svn.ffmpeg.org/ffmpeg/trunk
Patch by Lou Logan. Originally committed as revision 22695 to svn://svn.ffmpeg.org/ffmpeg/trunk
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