Everything seems to have worked. Wayne's point that deleting cvs via the administrative tools did not erase the actual data turned out to be the key. There were a couple other issues, but I seem to have worked thru them. Under other circumstances I'd recommend changes to the conversion docs. But given the timing, it seems a little pointless now.
DirectShow is primarily about showing video. It doesn't really have any 'drawing' tools. I'd be thinking along the lines of a transparent window on top of the video window, and use regular c# methods to do the drawing.
Update lib reference
Another deprecated method
Update version #
Add descriptions for new samples
Clarify the readme.