"R.L. Horn" <lists@eastcheap.org> wrote:
> Some popular (and sometimes mandated) frame dimensions just aren't
> divisible by 16
I haven't ever seen any. Pretty much every digital video expert knows
not to do such a stupid thing. I don't doubt there are websites and
perhaps products from small companies that might be so stupid.
> (perhaps most notably, 1080/16 = 67.5).
We call it "1080" for various reasons (eg. aspect ratio), but it's
actually encoded, broadcast, and decoded as 1088... precisely because
1080 isn't divisible by 32.
> Many more aren't divisible by 32 though, happily, both 480 and 576
> are.
Any standard designed for interlaced video should be (and all are,
AFAIK). You'll note that 480 and 576 don't exactly correspond to the
real dimentions of analog PAL/NTSC. They were specified as-is precisely
because they are mod32.
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