&gt; Videos with non-square pixels are pretty rare...<p>Before HD, almost all video was non-square pixels. DVD is 720x480. SD channels on cable TV systems are 528x480.

I’m no expert but this sounds like a digital version of the anamorphic lens&#x2F;system, doesn’t it?

Am I missing the obvious, but it seems like the author is messing with the aspect ratio.

This reminded me of retina screenshots on mac — selecting a 100×100 area can produce a 200×200 file. Different cause but same idea - the stored pixels don’t always match what you see on screen.

Proving that everything is more complicated than you first think it is when you lift up a corner of the rug.

Obligatory &quot;A Pixel Is Not A Little Square&quot;<p><a href="https:&#x2F;&#x2F;alvyray.com&#x2F;Memos&#x2F;CG&#x2F;Microsoft&#x2F;6_pixel.pdf" rel="nofollow">https:&#x2F;&#x2F;alvyray.com&#x2F;Memos&#x2F;CG&#x2F;Microsoft&#x2F;6_pixel.pdf</a>

HN

When square pixels aren't square

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