[FFmpeg-user] Does atadenoise work with 10bit HDR video?

[Paul B Mahol]

On Thu, Jun 27, 2024 at 8:45 AM Michael Koch <astroelectronic at t-online.de>
wrote:

> Am 26.06.2024 um 23:43 schrieb Oliver Fromme:
> > Hi,
> >
> > I'm using ffmpeg for a long time, but I've just recently started to
> > use it with 10bit HDR (HDR10) video.
> >
> > So far I found out how to re-encode HDR10 video with libx265 and
> > retain the HDR metadata.  It's a bit complicated, but it seems to
> > work fine.  However, I'm unsure about video filters.
> >
> > In particular, I often use the atadenoise filter.  It works really
> > well for 8bit SDR video.  But can it be used with HDR10 video, too?
> > Can I simply add ''-vf atadenoise`` to the command and it'll work,
> > or will it clip the data down to 8bit?
>
> You can make a test to check if a filter chain is 10-bit compatible.
> Make a test image (or video) with 1024 levels of gray in a 32x32 grid.
> Then apply the filterchain to this test image.
> Then apply strong contrast enhancement to the output video. If there was
> a hidden truncation to 8-bit, then there will be only 8 levels of gray
> in X direction.
> Described in chapter 2.201 in my book:
> http://www.astro-electronic.de/FFmpeg_Book.pdf
>
> According to my test, atadenoise is 10-bit compatible.
>

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>
> Michael
>
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