Originally Posted by lomaidala View Post
Now I count 3-2-3-2. I have no idea how I was seeing 4-6-4-6 before.
My guess is you made the AVI file using the Bob Doubler filter in VirtualDub. Then opened the AVI using that same instance of VirtualDub. The program doesn't clear out all the filters when you open a new file -- meaning the Bob Doubler filter was still active. So you were bob doubling twice, hence the 4:6 repeat pattern.

Originally Posted by lomaidala View Post
After ripping the DVD to your hard drive, use DGIndex to open the VOB (or VOBs if there are more than one).

File > Preview

"Video Type" will either say "Film" (soft telecine), or "NTSC" (hard telecine).
If the percentage is lower than 99%, it's hard telecined.
If the percentage is 99% or higher, it's soft telecined.
No, if the percentage is anything less than 100 it's a mix of hard and soft telecine. For example, 99 percent soft telecine, 1 percent hard telecine. But when there is only a little hard telecine you can often get away with ignoring it, treating the whole video as soft telecine, without getting audio/video sync problems, or being left with a lot of interlace comb artifacts.