[FFmpeg-user] Aspect Ratios: DAR, SAR and Frame Size

[Adi Shavit]

Boy! you guys are quick!
Thanks James, see my reply to Rio above.

 > As can be seen:
> >
> >    - The reported frame size is 352x240. This is an aspect ratio (AR) of
> >    22:15
> >    - SAR = 10:11
> >    - DAR = 4:3
> >
> > I have a few questions about these AR values:
> >
> >
> >    1. Obviously, the frame size is the decoded size of the frame.
> >    However, what do DAR and SAR mean in this context when they are both
> not
> >    1:1?
>
> Display Aspect Ratio and Sample Aspect Ratio.  The latter is also known
> as Pixel Aspect Ratio in some places.  This refers at the shape of the
> pixels.
>

I figured this out now:

Frame_AR x SAR == DAR   => (352/240)*(10/11) = 4/3 = 1.33333


Thanks,
Adi