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Formula for determining png animation size?

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Nick Zorn
Formula for determining png animation size?
on Mar 27, 2013 at 7:27:23 am

I'm trying to figure out a formula for determining how big an animation's file size would be, either with or without alpha channels. I'm working with pretty small png sequences (like 16x16 and 8x8 pixels). I need to determine what the file size would be so that I can figure out how many frames of animation that I can use.

Any help with this would be pretty great.

Thanks!


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Jonathan Ziegler
Re: Formula for determining png animation size?
on Mar 27, 2013 at 5:41:12 pm

Not sure how technical you want to get here, but here's the APNG specs:

http://en.wikipedia.org/wiki/APNG#Application_support

https://wiki.mozilla.org/APNG_Specification

http://littlesvr.ca/apng/

I think the basics are: your intro chunks, plus outtro chunks, plus frame size times color depth times number of frames divided by relevant compression equals bits. Divide by 8 for bytes, then 1024 for kB, etc.

Save early. Save often.

Jonathan Ziegler

http://www.electrictiger.com
520-360-8293


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