codec packs are indeed a instant fail. they are bloated and contain lots of codecs you never need.
they are done by amateurs, not professionals. they have flaws and most of them cannot be perfectly uninstalled.
you don't need a codec pack. "GOOD LUCK INSTALLING THE 200 DIFERENTS CODECS OUT THERE" is just stupid. you don't need 200 codecs. what you need is to install divx, matroska, realmedia alternative and VCL mediaplayer. that is all you need, and is far more superior to any codec pack.