Playing upconvert_from_screen_me2.avs. AVS file format detected. Invalid seek to negative position ffffffffffffffff!
I "think" meant that it wasn't sending any frames at all through. Using ffplay on it might help too. (DirectShowSource("push2.GRF")
What it really meant for me was that I had set my "x" parameter to be too high for my screen capture device so it wasn't capturing anything maybe [?] or was dying?