[Cin] DAR, PAR and SAR, again

[Terje J. Hanssen]

Den 19.01.2024 22:58, skrev Andrea paz:
> Well, I would say that I just don't understand how CinGG works!
> I was wrong in thinking that since Info-->Detail provided the same
> information as ffmpeg, then CinGG and ffmpeg worked the same way with
> non-square pixels. Instead we return to Raffaella Traniello's guide:
> the definitions of PAR=pixel aspecrt ratio; SAR=Storage aspect ratio;
> and DAR=display aspect ratio apply. And consequently the PAR=DAR/SAR
> formula applies, and so does the wikipedia table.
> However without knowing how to read the code of CinGG I am not able to
> understand anything. I think I will sleep on it now...
> My apologize.

Maybe a reason is that FFmpeg became implementet (heavily) in Cinelerra 
by GG version 4.6mod or was it 5.0?

But I want to ask Andrew here: How do the Set Format Presets take care 
of SAR, because selecting one I can't see it, or is it behind the scene 
somewhere?