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> "automatic" conversion from HDR to SDR inevitably looks bad, so production studios manually redo the color correction for SDR Perhaps that's it. What happens
by MaxBarraclough 5y ago
> "automatic" conversion from HDR to SDR inevitably looks bad, so production studios manually redo the color correction for SDR
Perhaps that's it. What happens if you point a camera at an HDR TV and view the image/video on an SDR TV? Would the colours look flat?
- gruez 5y agoProbably a combination of washed out colors, blown out highlights, and weird color grading. Keep in mind that cameras basically have their own tonemapping algorithms (see: https://lux.camera/understanding-proraw/ https://lux.camera/understanding-proraw/) that presumably isn't magic, so you'd have the same problems that HDR -> SDR tonemapping has. Also if you search around there are also HDR -> SDR releases that purports to use some sort per-scene analysis to do better HDR -> SDR conversions. Based on the screenshots they definitely look better, but they're still different than the real SDR release.
- MaxBarraclough 5y agoOn the plus side, I've found that HDR-enabled UHD streaming services cope fine with 4K/SDR. I imagine they send an entirely different (SDR) stream in that case.
- CarVac 5y agoApparently not the HBO Max stream in the post that started all of this, which has ugly clipped highlights from an HDR stream served to an SDR display.
- gruez 5y agoYeah, if you search around there aren't any 4K SDR releases for matrix 4. For a release this popular and this late after release, I'm guessing the reason is because it doesn't exist. The same applies to another HBO max exclusive, Dune. However, there are streaming services that have 4K SDR content (eg. Foundation from Apple TV), but it definitely seems to be the exception rather than the rule.