How do I get the CineMaster decoder to connect to FFDShow?

Firstly, make sure you're using ffdshow's "raw" mode. Next, if it doesn't already exists, create a DWORD registry value under [HKEY_LOCAL_MACHINE\SOFTWARE\Sonic\CineMaster DS DVD\2.5\VideoDecoder] called "AllowAllRenderers" and set it to 1.

This only applies to older versions of the cinemaster decoder, newer versions may not require this tweak.