I'm playing around with exporting. When I select my custom preset (1920 x 1080, 23.976 fps) the NTSC button in the same window is also selected. Never seemed right to me to see NTSC turned on when my export has nothing to do with NTSC.
Is this a layout or a design error in Premiere, or is the NTSC button highlighted for a good reason?
The 23.976 frame rate is defined by NTSC standards.
24p is a progressive format now widely adopted by those
planning on transferring a video signal to film. Film and video
makers use 24p even if their productions are not going to be
transferred to film, simply because of the on-screen "look" of
the (low) frame rate which matches native film.
When transferred to NTSC television, the rate is effectively slowed
to 23.976 FPS (24×1000÷1001 to be exact), and when transferred
to PAL or SECAM it is sped up to 25 FPS.