haasn
commented
1 year ago In the absence of metadata it infers a default spline of {0, X, 1, 1, 1, ... 1} where both X and the order of the spline is picked to make the function pass through a knee point as determined by the same logic used for st2094-10 and spline.
This should give mostly reasonable results, though obviously not as good as having HDR10+ metadata (the whole point of the function).
is it capable of tonemapping Dolby Vision
DV is converted to normal HDR10 PQ before it passes into the tone mapper, so DV vs non-DV doesn't matter here.
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Log file
Hi there I just have a quick question on st2094-40 and that is what happens when this tonemapping method is used on content which doesn’t have any dynamic metadata and is it capable of tonemapping Dolby vision Even if you think it's not necessary at first, it might help us later to find possible issues. Make a log file made with -v -v or --log-file=output.txt, paste it to https://0x0.st/ or attach it to the github issue, and replace this text with a link to it.