Compatibility with APNG (Animated PNG) files

[victorwestmann]

Hi there. First of all thank you for making such an awesome piece of software and for making it open source. This is much much appreciated! ~:-)

I was just wondering if it is possible, maybe in a future release, to make APNG files as output option as well.
Is it possible to donate to have certain feature requests implements for future releases? If so please let us know.

Thank you very much.

[mreinstein]

apng would be a great output target. Higher color support, better compression, open format, and reasonably ok cross browser support (excluding ie and edge at the moment.)

[Daijobou]

I would like this too. I found a comparsion page http://littlesvr.ca/apng/gif_apng_webp.html
GIF vs APNG vs WebP vs Lossy WebP.
Result: APNG is the winner.

Maybe WebP is a option too?

[mitrakov]

+1 for donate button 👍

[victorwestmann]

+1 for donate button too! Could not agree more.

…

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[walles]

Or maybe WEBP?

It's supported by more browsers than APNG, and creates 62% smaller files.

WEBM files are even smaller, but unlike WEBP files you can't put a loop flag inside of the WEBM file.

AVIF is cool (94% smaller file than the GIF), but lots of browsers don't have animation support for it.

	caniuse.com	Improvement
GIF	100%	0% = 2.0MB
APNG	96%	35% = 1.3MB
WEBP	97%	75% = 0.5MB
WEBM	97%	90% = 190kB
AVIF	83%	94% = 126kB

Size comparison from https://lukeroberts.tv/blog/gif-vs-animated-png/.

I got the AVIF by converting the original GIF at https://ezgif.com/gif-to-avif/, the WEBP image by converting the original GIF at https://ezgif.com/gif-to-webp/, and the WEBM image from https://ezgif.com/gif-to-webm/.

[silverwind]

webm would be awesome. Much smaller then gif and widely supported.