Unfortunately many of the programs required to provide full codec capabilities is too dependent on the x86 architecture (like some parts of ffdshow I believe).
I tried to get it all to work on PS3 (64-bit PPC) but never got it working properly.
That would be libffmpeg and not ffdshow - been doing too much video work on Windows lately
I’m not quite sure how the win32codecs handle themselves on PPC, most likely they don’t at all - I have to take another round at PPC64 on my PS3 and see if any of the issues have been cleared. It’s a shame the PS3 is so horrible crippled (Only 2 cores, 256MB of memory out of 512 etc.)