I really appreciate this.
So I ran into issues and kind of gave up the other night out of frustration. I got jriver setup to passthrough the capture card to the screen. I tried jriver default processor, and tried connecting it to SVP using the post processing filter avisynth. BUT... every single time I tried to click properties, jriver would crash. I assume I should be able to click on the properties button inside jriver and have something pop up with avisynth? And any video I tried to play via capture card to svp, svp always showed no video playing. I did get svp to register a video was playing out of MPC HC, but it never got ANY changes in the displayed video / processor load beyond SVP recognizing a video was playing, showing a 1.0 ... something in the performance graph.
I feel like I have a wonderfully working madvr setup, albeit, extremely high GPU usage and the typical low framerate. I'm really frustrated I've been unable to make SVP function. I've tried reinstalling, etc.