mipsel mplayer

Hi,

I'm planning to acquire some mipsel mini-pc's (mips 64 bits), and for
sure there's no w32codecs or w64codecs support for sure. Given that
mplayer decodes using ffmpeg, would I miss something by using the
mipsel mini-pc's? Would it be just some wmas or wmvs? How about real
media like *.rm and *.rmvb (real media variable bit rate)? I have old
media in that format, that I would like to be able to watch...
Perhaps old wmas and wmvs are also a posibility? Any ways, I like I
can still watch regular avis, ogms, mpegs, and mp4s, and perhaps
that's for sure, right?

Is there anything that I'll miss for sure from mplayer point of view, on mipsel?

Thanks,

--
Javier.