Oh dear... Oh dear...
The following process that I'm about to suggest could render your Sonic whatever that is useless. However if you prefer it rather than installing CCCP (if you decide to chose this option, then uninstall everything beforehand that you installed with the guide that you used before), then here you go;
1) Reinstall ffdshow just to be sure (make sure you check AAC, Vorbis, AC3, MP1/2/3, DTS, DivX, XviD, H.264/AVC1 decoding when installing)
2) Get the DirectShowFilter Manager from
here
3) Open this program
4) Find the following items:
*) ffdshow Video Decoder
*) ffdshow Audio Decoder
5) Select each one of them separately and click on
Show filter properties
6) Move the slider in the
Filter usage box to
Preferred or above and confirm by clicking on
Set new merit
7) Now find:
Sonic Cinemaster® MCE Audio Decoder 4.11
Sonic AVC Decoder DMO
8) Do the same for them as described previously, but move the slider to
Do not use instead.
Restart your system, test out the new behaviour by playing some videos. And also post another test render, just so that I can be sure that it all worked as it should have.
P.S. Use a player like MPC (make sure to disable its own internal filters like the Subtitle Renderer, AAC, AC3, DTS and others) or ZoomPlayer.