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Date: Mon, 21 Feb 2022 14:48:30 +0100
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From: Niklas Haas <ffmpeg@haasn.xyz>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
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Subject: Re: [FFmpeg-devel] [PATCH] lavfi/vf_libplacebo: support custom
 .cube LUTs
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On Mon, 21 Feb 2022 12:38:54 +0100 Anton Khirnov <anton@khirnov.net> wrote:
> Quoting Niklas Haas (2022-02-21 12:36:23)
> > On Mon, 21 Feb 2022 12:33:19 +0100 Anton Khirnov <anton@khirnov.net> wrote:
> > > Non-overridable IO in random places is evil.
> > 
> > Can you recommend a better way of accomplishing this?
> 
> How large are these? Can they be set directly as binary AVOptions?
> We could invent syntax for ffmpeg.c to provide the contents of a file as
> an option value.

Yes, I think that's a good idea in general. That would also apply
retroactively to the custom_shader_path / custom_shader_bin options.

Typically, these LUTs are around 1MB in size, but I also have LUTs as
large as 100 MB.

Syntax-wise, my proposal would be `option=@filename.cube`, matching e.g.
`curl -F src=@filename`.
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