trouble installing FFMPEG and the codecs

Hello,

I would like to ask some question, currently i am running RHEL 6.4 and i have trouble installing FFMPEG and it’s codecs library (or dependencies). So far Red Hat doesn't natively support these library right ?(CMIIW) ...

I have followed instructions here and there from google, Razuna and FFMPEG trac, but still have no luck.
Mostly fail (or maybe not perfect) on installing x264 or FFMPEG.

Fail information while installing ffmpeg and/or x264 including :
- yasm must be at least 1.2.0 (when yasm 1.1 was installed using yum)
- yasm not found (when yasm 1.2.0 was installed from source)
- libx264 not found (when x264 installed from source, because git link is down)

Is there any chance that exist a 99% fail-proof guide for installing FFMPEG, x264, Aacenc, libvpx, libtheora, libvorbis, libogg, yasm 1.2.0, aaand other dependencies? Or maybe can i request this to Red Hat subscription as part of the Red Hat Enhancement Advisories (RHEA) ?

Thank you.