[Cin] New libdav1d, ICC profile support in ffm[eg git

[Phyllis Smith]

Dav1d 0.6.0 has been upgraded in Cinelerra and checked into GIT.  Thanks
for the notify.

On Thu, Mar 12, 2020 at 6:22 AM Andrew Randrianasulu <
randrianasulu at gmail.com> wrote:

> Fresh news!
>
>
> https://www.phoronix.com/scan.php?page=news_item&px=Dav1d-0.6-AV1-Benchmarks
>
> ---quote---
> But where things really got interesting for the Intel/AMD processors was
> the much faster 10-bit decoding of AV1 content with dav1d 0.6.0 for both
> Intel and AMD.
> Very significant gains in this case.
>
> ---quote end---
>
> In ffmpeg we can see
>
>
> https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/05d27f342be28cf92f3c9470e701834c416cad89
>
> API: add AV_PKT_DATA_ICC_PROFILE to AVPacketSideDataType
>
> and next few patches ....
>
> comment in avcodec.h says:
>
> ---quote--
> +     * ICC profile data consisting of an opaque octet buffer following the
> +     * format described by ISO 15076-1.
> +     */
> +    AV_PKT_DATA_ICC_PROFILE,
> --end of quote----
>
> pdf itself is huge, but hopefully other libs already have something?
>
> http://www.color.org/icc_specs2.xalter
> v4 ICC Specification
>  This version is technically identical to ISO 15076-1:2010, which is
> available from ISO.
> This is the most widely used version, first published in 2001.
> Specification ICC.1:2010-12 (Profile version 4.3.0.0)
> Image technology colour management - Architecture, profile format, and
> data structure
>
> http://www.color.org/specification/ICC1v43_2010-12.pdf
>
> Strange enough, but website littlecms.com doesn't work for me ....
>
> Anyway, hopefully no-one need to *print* films right now, so it all
> will be about monitors and files..
>
> I may misunderstand something, but whole point of color management
> is to get same color on slightly different devices?
>
> So, if you work with Monitor A and you have color profile for your monitor,
> you can store  this profile somewhere in image and now video file, and
> then
> on load supported player/editor will auto-correct things, relative to
> another (monitor B)
> output device, so you can work on colors across few monitors in different
> locations, say.
>
> I may misunderstand this, never feel special need for such fine-tuning of
> colors.
> --
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> Cin at lists.cinelerra-gg.org
> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>
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