NTSC film or video - how do you know?

[tonypro2]

I tried a DVD backup assuming it was NTSC film, using 3:2 pulldown. The results were horrible - jerkiness during motion scenes. I bet a strait 29.9 fps encode interlaced would look better... Most DVD ripping guides mention the 3:2 pulldown however. How do you know when the source is NTSC film or NTSC video? Can DVD2AVI help here? IFOedit?

[asifanwar]

If you view the VOB file in DVD2AVI, the statistics window will tell you at the top.
"FILM"
"NTSC"
"Interlaced"
"Progressive"

If it says FILM for more than about 90-95% of the time, then do a 3:2 pulldown.