While our screens display Red Green and Blue pixels, video codecs don't encode data this way. Instead they encode data in Luma, Blue projection, and Red projection (YUV) Why do they do this?pic.twitter.com/sIaO9HbyPJ
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While our screens display Red Green and Blue pixels, video codecs don't encode data this way. Instead they encode data in Luma, Blue projection, and Red projection (YUV) Why do they do this?pic.twitter.com/sIaO9HbyPJ
Well first, Because it has a more natural colour spectrum, you can mess the values up more and still have a (human) acceptable image. Bonus points, you can rearrange YUV to pack a lot of the values together, say YYYYYYUUVV for 6 pixels and have far better compression
But what has this got to do with the green screen? Well. YUV = (0,0,0) is green: http://www.mikekohn.net/file_formats/yuv_rgb_converter.php … The data you are seeing, is the codec presenting a bunch of zero's to the image display code. You can read more about YUV colour encoding here: https://en.wikipedia.org/wiki/YUV pic.twitter.com/NFixNVm2of
Legit don’t even know what this truly means, however I can fully appreciate the explanation and now I will understand better when I see this. Question, does this apply in any way to why green screens are used for image overlay in video?
IIRC, green and blue screens are used because they usually have very few, if any hues on human skin, so during post-production it's much simpler to remove "all pure green or blue" then tone down the regions where it may bleed into the skin parts of image...
Green is the new black
Ben!!!!!!!!!!!!!! 
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