[Qgis-community-team] Image size in Visual Changelog

[João Gaspar]

Hi Richard,

Animated GIF are great but is necessary avoid big files. In some
situations, i have experiences that the same file in .mp4 is small than
animated gif.

For Windows i use this open source https://www.screentogif.com/
unfortunately the developer don't have others OS alternatives. The
advantage of this software is increase and decrease speed between frames
and remove duplicate frames (you can set the % of similar frames)  that
make heavy the animated gif.

For Linux Distributions you have peek  and i found a way to compress the
future gif files:
https://github.com/phw/peek#why-are-the-gif-files-so-big

For compression both softwares (screen2gif and peek) can use FFmpeg or
gifski to compress the gif files. The only thing that is needed is a
compression that have a commitment between quality/storage.

For others images i think the images can respect the guidelines of
documentation (
https://docs.qgis.org/2.18/en/docs/documentation_guidelines/writing.html#managing-screenshots)
is enough to solve the problem.

The only thing that i don't see is a way to convert the actual animated gif
to a optimized animated gif's.

I hope this can help.


Regards,
João aka James

Richard Duivenvoorde <rdmailings at duif.net> escreveu no dia quarta,
28/11/2018 à(s) 11:32:

> Hi,
>
> We currently pull the images for visual changelogs into qgis.org:
>
> https://qgis.org/en/site/forusers/visualchangelog34/index.html
>
> https://qgis.org/en/_images/750d7d9b7e9dbd498202c4b1288a0cbceb1cd65b.png
>
> Some images are actually too big (like the one above is 3.4Mb !) to be
> used in a web page.
> Also the gif's are great, but... some of them even 8.2Mb big...
>
> Have to think about this, I think?
> Or should we just do this...? It does put some pressure on our
> disks/webserver though.
>
> I've been thinking about having previews and users have to click on the
> thumbnail, but (besides not succeeded yet in rst), it also takes away
> the 'charm' of the little 'changelog movies' you see.
>
> What do others think?
>
> Regards,
>
> Richard Duivenvoorde
>
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