2:2 pulldown.

On DVDs the "Progressive frame flag" is next to useless, for historic 
reasons.
So, does anyone know of an automated way to discover if a PAL DVD 
contains film content (frames) or TV content (interlaced fields)

I am not asking about 3:2 pulldown in NTSC because that it easy to 
detect using repeat first field flags.
I am only concerned about PAL.

James


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