Open wyup opened 3 days ago
It's not just about tone mapping, it's its own colorspace when we're talking about profile 5. Because it requires reshaping to become PQ/Rec.2020.
So then should I use DOVI colourspace instead of HDR10 with profile 5 upwards for increased precision? What is exactly DV colorspace: BT.2020 with IPTPQc2/ICTCP representation? I guess 4k/HDR10 content is mostly mastered in PQ colorspace, hence DV might be in broader Rec.2020. Does it have to do with FEL 12-bit layer or is independent?
So then should I use DOVI colourspace instead of HDR10 with profile 5 upwards for increased precision?
You have to use it for profile 5 or anything you want reshaping processed.
What is exactly DV colorspace: BT.2020 with IPTPQc2/ICTCP representation?
Yes.
Does it have to do with FEL 12-bit layer or is independent?
Profile 7 may have reshaping as well, but the EL part is done after reshaping.
But in reality, it is not another colorspace. It is BT.2020 with full range, ICtCp representation and a cross talk matrix. But for that to be consistent, the movie should be graded in BT.2020 and normally mastering monitor is P3, as reported by the HDR10 colorspace metadata. I haven't seen any content with BT.2020 mastering monitor metadata, even if some actual content is outside P3.
In tonemapping options:
How is Dolby Vision a colorspace? I thought it is mostly a propietary tonemapping algorithm for tvs and media players. AFAIK, movies with Dolby Vision are mostly in Rec.2020 colorspace and PQ, that's to say: HDR10.