Re: Replacing the animal photos in the ‘erase’ activities

[Timothée Giet]

Using webp images would surely help :)
Even using it with some level of lossy compression would probably be
acceptable.

But first thing before moving to it, is to make sure we can package it
and make it work fine for all our supported platforms.

@Johnny: when you have some time, can you setup a test branch with
what's needed in cmake to get webp support packaged, along with a few
images converted to it ?
Then I'll try to make test packages for all platforms. And if all works
good, I'll do further encoding tests to decide which options to use.

@Karl: once we get positive test results with webp, I'll let you know
and you'll be welcome to update those photos :)

Side note: it's a bit late for next week's 2.2 release, but if all works
good it could be a nice feature to include later in 2.3.

Cheers,
Timothée

Le 20/02/2022 à 16:48, Johnny Jazeix a écrit :
> Hi,
>
> Regarding these images (and the other ones in paintings that also take
> some place), could it be worth to look at webp format?
> The Qt image plugin is ~500ko.
> For paintings, we go from 9.1Mo to 6.6Mo using `magick $f -quality 100
> -define webp:lossless=true $f.webp` which should be lossless so just
> with it, the size should be better.
> We can even go to 1.9Mo if we use a quality of 90 (but a bit lossless,
> I can't tell if it is visible or not).
>
> For jpg ones in erase, if I do ` magick $f -quality 50 $f.webp`, I
> manage to go from 5.3Mo to 2.3Mo.
> If I keep quality to 100 or do a lossless=true, size goes up to 20Mo,
> so not interesting.
>
> Maybe some options from https://imagemagick.org/script/webp.php
> <https://imagemagick.org/script/webp.php> could be interesting too.
>
> Cheers,
>
> Johnny