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

[Michael Koch]

Am 27.06.2024 um 08:57 schrieb 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.
>>
> Be aware that this book spreads countless statements that are either:
>
>   - misinformation
>   - malinformation
>   - disinformation
>   - untrue
>   - invalid
>   - unconfirmed
>   - typo
>   - broken
>   - never worked

Anybody who finds something wrong can just let me know.
My contact information is on the first page.

>   - was correct >X months ago

Yes, unfortunately there are several things that worked fine months or 
years ago, but now don't work any more.

Michael