Just a little aside on those codecs linkedon 64bit systems but I believe that these systems require another set of codecs that can be downloaded here
There are only 3 .so's in the pack, all I believe related to real audio or video
There is an additional 6 .so's available but only in the mplayer-extras-codecs......x86_64.rpm
Again I believe they're all ra and rm related, as to their value I don't know.
If desired, with the package 'rpm' installed they can be dl'ed and extracted with archive manager
screen shows the add. .so's