> On Oct 26, 2015, at 9:15 AM, Carl Eugen Hoyos <[email protected]> wrote:
> 
> I believe (strongly) that what you like as output 
> framerate is not 29.97 but 30000/1001


Hi Carl,

I guess I'm looking for the "why",  rather than the "what", as far as this 
syntax is concerned. 

In NTSC broadcast land, 29.97 frame rate is *always* defined and referred to as 
just that: 29.97. No professional video tool that I'm aware of requires the 
user to define that frame rate with the level of precision that dividing 30000 
by 1001 gives you.

And I suppose this begs the question, where do the numbers 30000 and 1001 come 
from to begin with? 

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