I don't really maintain this thread anymore, but, I was reminded of it and thought to update a few links. Most importantly, ffdshow is just completely dead. Ffdshow-tryouts has completely replaced it and is now so far ahead that it would be a mistake to use ffdshow instead anymore. I also removed the XviD and DivX links because, interestingly enough, the latest ffdshow-tryouts actually supports encoding! Among other things, you can select XviD for MPEG4, HuffYUV, and numerous others, so there's no need for added redundancy IMO. Of course, XviD didn't post binaries on their site anyway, so if one wanted it they still had to look elsewhere and I don't have much use for DivX since it went commercial.
I've also pointed to the newer Media Player Classic modifications known as Home Cinema. It adds a bunch of fixes since MPC appears to also be a dead project now. It supports newer renderers for Vista/7 users and it is supposed to stop the video tearing that some people were able to get with some setups.
Does anyone know of anything else that could be considered fundamental so should be in the first post rather than an update post?
Are any of these codecs really better or offer more support than the built-in ones in Windows 7? I mean I know there's some obscure stuff it can't play (.rm, but Real can go to hell), but I have a hard time finding a good reason to even use MPC-HC anymore. Not trying to start a flame-war, honest concern.