Shark, is there a page you can link to that shows the "proper" configuration of your codecs for Win7 x64 installations?
There is no such thing as a proper configuration that will meet everyone's needs.
What works for this person, doesnt for that person. My codec releases
EMPOWER you to find your own playback niche setup that works for you and also allows you to save that configuration once you figure it out. (Save/Restore settings on the MISC TAB)
You should NOT be having grainy/poor playback.
Often this is the result of a default installation and no exploration of the available settings on the part of the user. I have gone to great lengths to assist users along thier journey of self discovery. A feature you should get familiar with is called Reset All. Explore the possibilities the configuration TABS offer and when you get in to deep, use Reset All. This feature sets all configuration settings back to installation defaults. Keep track of what worked and what didnt.
My releases will solve your issue(s) but on that note, there is no one configuration that will work for everyone. Also, I have not implemented known 'good' settings purposely because research told me that I should NOT touch the system settings by default.
I can suggest to you, open the x64 Settings Application, select FFDshow on the righthand side of the H264 TAB and also go to the SWAP TAB and select FFDshow for everything there except WVC1 and MPEG2. These suggestions will probably correct any poor playback you are currently experiencing.
A couple of handy suggestions:
M2TS files that play without audio, on the SWAP TAB, choose to disable Windows Media Foundation.
And one more for x64 users. Playback of Standalone FLAC audio files in x64 MC. On the Config TAB of the x64 Application, choose to toggle the WMP to x64 and back to 32bit will permanenly enable x64 MC to play standalone FLAC audio.