| Not sure how you're going to solve the WebM hosting issues, but I would be really curious to see a list of issues large sites like 4chan have. I think me and other people would surely like to solve such «sysadmin/developer puzzles» for fun. WebP is larger than APNG [1] and is supported more widely according to the following table [2]. There is a way to add compatibility to older browser too [3].
Other than that, there are also Opera [4] and Chrome [5] extensions for APNG. Update: Found a successful APNG kickstarter campaign, which lists some interesting APNG tools and libraries. [6] Also just tested myself how the filesize compares for different file formats able to host animated content for this source image [7]. gif – 679,6 Kb
apng – 547,1 Kb
mp4 – 273,8 Kb
webp – 618,9 Kb
(sorry, have no webm converter here)--- [1] http://littlesvr.ca/apng/gif_apng_webp.html [2] http://caniuse.com/apng [3] http://davidmz.github.io/apng-canvas/ [4] https://addons.opera.com/de/extensions/details/apng/?display... [5] https://chrome.google.com/webstore/detail/apng/ehkepjiconegk... [6] https://www.kickstarter.com/projects/374397522/apngasm-foss-... [7] http://37.media.tumblr.com/70a88618cc58ac5ad670ab175f8a1419/... |
I'd expect them to beat PNG with acceptable quality, since PNG's compression (gzip with some prefilters to make image data more gzippable) is the work of someone either limited by patents or not informed enough to make their own entropy coder.
Also try 'ffv1' in ffmpeg; it's lossless and will win every time.