I am trying to make sense of each of the…

I am trying to make sense of each of the ffmpeg settings, and make sure they are sensible for the mobile clients. Hailin, were these chosen based on a particular set of recommendations? Were these based on trial and error?

Here is a set of references and forum posts I have been collecting during this process. Hope it helps others save a few minutes.
http://randomsilicon.blogspot.com/2009/10/x264-encoding-options.html