The short answer: a little bit. But it’s hard to tell the difference without enlarging the footage. Here’s some examples (click images below to get a closer look):
Below: Enlarged to 200 percent, can you tell which one is the Prores 4-2-2 and which is H.264 4-2-0?
The one on left is 4-2-2. You can see the compression artifacts if you look closely at the image on right.
A note on methodology: I shot the above clip about 1.5 stops underexposed, at 24p, with Hyperdeck Shuttle II. I had to boost the gain to get it to look normal. So what you’re looking at are images that are being pushed around a bit to see how well they hold up respectively.
Is this amount of improvement worth the extra hassle of lugging a portable recorder, and living with 3:2 pulldown judder in your 24p footage?
But wait, there’s one more thing…
My last test was to try pulling a key. Check this out.
So. There you have it. For greenscreen work, it’s the way to go.