[Cin] The best strategy to render yuv (mpeg, limited range) from yuvj (jpeg, full range)?

[Andrew Randrianasulu]

On Tue, Aug 27, 2024 at 11:17 PM Tarantas via Cin
<cin at lists.cinelerra-gg.org> wrote:
>
> So, my sources are in yuvj, and my target (youtube) is yuv.
> I want to find the best strategy to minimize color banding and maximize
> dynamic range available.
> My current settings for this are:
>  - JPEG in "preferences";

Unfortunately, this setting controls both input and output color range
(swscaler, part of ffmpeg).

So I think you need to put some kind of filter either doing full-range
-> limited range on input media,
or full range-> limited range for whole file on output ....


>  - RGBA-float in "format" (color correction in YUV leads to a lot of
>    color banding).
> The problem is: I couldn't render this RGBA-float into YUV. No matter
> what render settings I use, it renders in full range. Putting
> color_range=mpeg doesn't help, because it just flags the file to be in
> limited range, leading to increased contrast of image.
> So, I'm a little confused. What I am really supposed to do? Using
> ColorSpace filter is not convenient with filter like histogram, for
> example.
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