[MPlayer-users] 23.976 or 24fps on NTSC DVD's?

[Duane Evenson]

Do NTSC DVD's store movies at 23.976 or 24fps?
I've read and seen that mplayer will print "demux_mpg:  24fps 
progressive NTSC content detected...",
but then when encoding, I'm supposed to use "-ofps 23.976". I realize 
we're talking about 1/10%, but what is correct?
I assume that mplayer can play almost any video's frame rate <= my 
monitor's refresh rate, so the final frame rate isn't important. I want 
to use the same frame rate as the DVD to reduce file size and 
unnecessary (and lossy) processing of frames.