I found out the problem, but I still don't know the solution. I used Virtual Dub with a plug-in that allows working with flv files. I took one of the HD (not 1080p but standard HD) downloads from CBS (see prior message for links) and opened it in Virtual Dub. Upon examination, at irregular intervals, there appears to be duplicate video frames created, one right after another. When these duplicates occur, they seem to replace the next progressive frame that should have been there originally, so we end up with not only a doubling up of frames, but a missing frame as well because the duplicate replaces the actual frame. Since this happens irregularly and only involves two frames, we end up with the stuttering effect. Now the question is, what's causing it and what's the solution? Either all of the HD videos from CBS for this particular program have this fault upon download, or there is a glitch in
GetFLV causing it. Like I said before, it only happens on CBS HD and not HD 1080p.
Just to see what would happen, I took a one minute section and removed all duplicate frames and saved it as a new AVI with Virtual Dub. The stuttering wasn't as great, but still there because now a frame is missing, the one the duplicate replaces.
Is there another program I can try with CBS to see if I get the same results?