Thanks for contributing, Erik. On 18/05/2025 18.18, Erik Dobberkau wrote:
Is it all right to 'talk' about the picture stream? For the various permutations of OETF (in camera), what comes out the decoder? I assume that for BT2020 SMPTE2084 it's HDR10 PQ, and for BT2100 it's either HDR10 PQ or HDR10 HLG. In other words, the decoder just makes pictures but doesn't do color transforms. To the best of your knowledge, is that correct?
In other available LUTs (e.g. from NHK/BBC or NBCU), the name follows the schema indicated by Andrew, i.e. primaries and transfer function for input first, output second. For the "standard use case", i.e. a ready-to-play file, you would therefore chose a LUT which has no "linear" in the second token. Also, they are configured to be applied without further "tweaks", however that may depend on how the source image was processed. Often, you may find an accompanying document explaining the intended use for the supplied LUTs.
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