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Date: Wed, 21 Jun 2023 00:12:06 +0200 (CEST)
From: Lynne <dev@lynne.ee>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
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Subject: Re: [FFmpeg-devel] [PATCH 1/2] lavfi: remove scale_vulkan filter
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Jun 20, 2023, 23:58 by ffmpeg@haasn.xyz:

> On Tue, 20 Jun 2023 19:32:28 +0200 Lynne <dev@lynne.ee> wrote:
>
>> libplacebo is better in every way for anything involving scaling or format conversions
>>
>
> Hi,
>
> vf_libplacebo always goes through internal RGB conversion, even for no-op.
> scale_vulkan (ditto overlay_vulkan) can be more efficient for simple YCbCr
> frames.
>
> I would rather replace scale_vulkan's implementation by pl_scale_* calls if you
> want to go this route.
>

I suppose I'll fix them up a little and leave them in, with
a note in the docs.
overlay_vulkan does work, but scale_vulkan is currently
broken for yuv420p (444 works oddly).
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