[FFmpeg-user] [Cin] FranceBB's LUT collection

[Paul B Mahol]

On Tue, May 20, 2025 at 6:25 PM Mark Filipak <markfilipak.imdb at gmail.com>
wrote:

> On 16/05/2025 19.01, Andrew Randrianasulu wrote:
> > пт, 16 июл. 2021 г., 09:36 Andrea paz via Cin <
> cin at lists.cinelerra-gg.org>:
> >
> >> I made a forum post to keep track of the repository. So if a request
> >> is made we can direct to that post.
> >>
> >>
> >>
> https://www.cinelerra-gg.org/forum/help-video/francebb-luts-for-space-color-conversions/
>
> This looked promising, but it has to be put to bed.
>
> BT2020_HDR_PQ_to_BT709.cube - this CLUT doesn't exist. That's Ultra
> Blu-ray HDR input to Blu-ray SDR
> output -- two colorspaces that are as common as dirt -- but such a CLUT
> doesn't exist!
>
> BT2020_HDR_PQ_to_<something>.cube followed by <something>_to_BT709.cube --
> <something> being an
> intermediate colorspace in common -- but such a <something> doesn't exist.
> I tried every combination
> that makes any sense and a few that make no sense.
>

IIRC you need tonemap related filter for HDR to SDR conversion.

Simple LUT can not do it.


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