I just went back to ffdshow version 20030103, as it was faster than 20030523 (the only two I know of that work with TheaterTek).
Anyawy - I only turned on resize (to 1920x1080) via fast bilinear mide and adjusted the luma/chroma sharpen to 1.2 and 1.5 respectively.
With only this, my P4 1.8GHz (the older Willy core - not very overclockable) and Asus P4S533, Radeon 9000np is barely able to achieve smooth playback. I get a few hiccups - normally on scene changes - but for the most part, it's smooth. With the newer version of ffdshow, I couldn't even get this combo to work...
I would have thought that I'd at least be able to run bicubic or lanzcos mode, with the gradual denoise filter first. Is this typical performance with my setup?
Anyway - I'm not seeing any difference in the luma/chroma sharpening. I can go and move the sliders all the way up and down while the movie is playing, hit apply on both the ffdshow and TT windows, and I see no change. Should there be an obnoxious setting that would show me if the filter is really doing anything?
Also - can you use the luma/chroma sharpen even if you don't resize via ffdshow? Or do you have to have that resize box checked?