[FFmpeg-user] xyz to rgb conversion

[Andreas Gumm]

May I'm wrong with the idea, but is it not good enough to simply unwrap the
JPEG2000 stream to image sequence?

Andreas

Andreas Gumm
______________________________________
metakraft ® - DVD CD und Web-Produktion Berlin
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2013/10/4 SK Cinema <senthil at real-image.com>

>
> (The tiff encoder currently does not accept xyz.)
> Please provide a tiff sample containing xyz.
>
> Here's a sample of a tiff containing X'Y'Z'. Google Viewer seems unable to
> display this tiff correctly so please download and view locally.
>
> https://docs.google.com/file/d/0B1U1rZVj1f7pbXdlZkFucjhTQk0/edit?usp=sharing
>
> Ironically, I made this tiff with an older ffmpeg build (2013-04-18) which
> did not yet have the XYZ-RGB conversion! In my understanding, any output
> that supports RGB 4:4:4 will be perfectly capable of supporting XYZ because
> XYZ is really just a much wider gamut version of RGB where the color
> primaries are the absolute values based on which RGB primaries for color
> spaces such as Rec.709 are defined.
>
> I also tried to use a custom 3D LUT using the following option:
> -vf lut3d=XYZ-sRGB.3dl
>
> But again, this is defeated by the XYZ-RGB conversion happening prior to
> the
> 3D LUT being applied, which is not the desired result.
>
> Thanks for looking into this!
>
>
>
>
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