[Cin] Awesome functions for Arch

[Andrew Randrianasulu]

пт, 2 июн. 2023 г., 23:22 Andrew Randrianasulu <randrianasulu at gmail.com>:

>
>
> ср, 31 мая 2023 г., 23:53 Andrew Randrianasulu <randrianasulu at gmail.com>:
>
>> https://aur.archlinux.org/packages/vapoursynth-plugin-awsmfunc-git
>>
>> literally ...
>>
>> For that? For x265 HDR param calculations, of course! :)
>>
>
Unfortunately, on just dualcore notebook cpu this script works extremely
slowly (0.13 fps?) but apparently it works!

https://www.linux.org.ru/forum/multimedia/17247063?lastmod=1685951506829






>
> There is another discussion on Magic Lantern forums, some users tried DVR
> as way to generate x265's parameters, either static or dynamic, but on
> their monitors dynamic hdr10+ was not really different ...
>
> https://www.magiclantern.fm/forum/index.php?topic=26428.0
>
> ====
> vastunghia
> <https://www.magiclantern.fm/forum/index.php?action=profile;u=87548>
>
>
> « *Reply #16 on:* April 27, 2022, 01:15:21 PM »
> Quote from: timbytheriver on April 21, 2022, 01:13:39 PM
> <https://www.magiclantern.fm/forum/index.php?topic=26428.msg238612#msg238612>
>
> Btw, did you ever get to actually see the effect of your HDR10+ metadata
> on your display?  [image: :D]
>
>
> I prepared 4 versions of the same clip, namely
>
>    - *PQ10*, i.e. PQ transfer characteristics and BT.2020 color space (no
>    metadata at all!)
>    - *HDR10*, namely (1) + static HDR10 metadata (mastering display color
>    primaries + min and max luminance + MaxCLL + MaxFALL)
>    - *HDR10+ Profile A*, namely (2) + dynamic metadata consisting of
>    luminance distribution parameters
>    - *HDR10+ Profile B*, namely (3) + dynamic metadata consisting of
>    Bezier curve parameters
>
> The clip included some very bright scenes, some more balanced scenes, as
> well as some very dark scenes with a few bright spots.
>
> To assess the four versions of the clip, I photographed the TV screen from
> a long distance in a dark room, of course taking Raw pictures and baking
> them with exactly the same (somewhat neutral) settings in ACR.
>
> The results:
>
>    - version 1 is slightly darker in all cases (this somewhat surprised
>    me as I expected on the contrary that no metadata could lead to
>    oversaturated / clipped highlights)
>    - versions 3 and 4 look apparently identical (no surprise), but they
>    seem to roll highlights (as well as shadows) slightly differently from 2,
>    in a non-trivial way (in most, but not all cases, increasing contrast
>    slightly)
>
> So yes, in the end I could find some differences with my TV -- but very
> subtle, in many cases visible more by comparing the sample pictures
> histogram rather than really perceivable with the naked eye.
>
> *Sergio*
>
> *==== end of quote ====*
>
>
> Still, I guess having those python functions cloned locally  might be good
> idea!
>
> Also, note they used hdr metadata output in DVR, this is reason why I
> looked into mpv's incomplete (in this regard) HDR support ...
>
> Also note they used hdr10+ capable TV so, even if you do not have monitor,
> may be going to friend with BIIIG TV will help in some ways!
>
>>
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