How can I programmatically create APNG files?

Question

Generally I use PHP, and ImageMagick, but as far as I can tell it seems the ImageMagick group refuse to implement the ability to create/understand animated PNG files?

What tooling can I implement to take a dozen JPEG files and create an animated PNG out of them? I'd prefer to have a PHP api, but I can branch out into another language if required!

Thanks

Juliannejuliano

Maybe this? github.com/eight04/pyAPNG – Geophyte

Why do you use APNG? It has never been widely supported. WebP has got a lot more traction. – Aker

AFAIK you're wrong, APNG actually has better support than WebP. caniuse.com/#feat=apng caniuse.com/#feat=webp Crucially WebP is missing MacOS/iOS Safari support, which is HUGE, where in contrast APNG misses IE11/Edge, which is a tiny percentage (and declining) of my users. – Juliannejuliano

Edge now supports APNG. – Polarimeter

@orionelenzil But sadly not Powerpoint – Distinctly

Answer 1

As of ImageMagick 7.0.10-31, Animated PNG is supported.

magick -delay 100 -loop 0 frame1.png frame2.png APNG:myanimation.png

parameters:
-delay 100 specifies a duration of 100 centiseconds (aka one second) per frame before moving on to the next frame.
-loop 0 tells the animation to repeat forever.
APNG:___.png specifies the output should be animated png.

(thanks to @fmw42 for improvements)

note: on MacOS Ventura, this seems to require ffmpeg as well.

Polarimeter

Your syntax is not actually correct. You specify it properly as magick -delay 100 -loop 0 frame1.png frame2.png APNG:myanimatedpng.png Note the APNG: preface and that it is actually a sub function of png. Also in Imagemagick 7, use magick, not magick convert. The changelog lists it as added 7.0.10.31 – Seizing

thank you for these. updated. in my own work I realized "apng:foo.png" was better, but forgot to come back and edit my answer. – Polarimeter

I did give you an up vote for your answer anyway already as you properly noted that Imagemagick can do that. – Seizing

lol, i keep searching "imagemagick animated png" and coming back to this page and upvoting this answer and then wondering why my upvote isn't working. – Polarimeter

You can only upvote once on any given topic. Also you cannot upvote your own answer. – Seizing

:) yes, i know. i keep forgetting it's my answer. – Polarimeter