[29] APNG は、 PNG にアニメーション対応を追加した画像形式です。 GIF に対するアニメーションGIFに相当しますが、 PNG 同様にすべての色を使うことができます。

仕様書

文脈

[30] Web では、 Firefox と Safari と Chrome が対応しています。

[39] LINEスタンプでも採用されています。

MIME 型

[38] PNG と互換性があるので、通常は image/png が用いられます。

[36] 他に image/vnd.mozilla.apng があります。 IANA登録簿にも2015年8月に登録 >>37 されています。

[49] image/apng が使われることもあるようです。

競合

[44] 次の競合するアニメーション形式があります。

歴史

[1] APNG 0.4 http://www.vlad1.com/~vladimir/projects/apng/ (名無しさん)

[2] APNG 0.4 (2004-09-11 03:21:05 +09:00 版) http://www.vlad1.com/~vladimir/projects/apng/AnimatedPNG.html (名無しさん)

[3] APNG Implementation (2007-03-20 11:58:30 +09:00 版) http://littlesvr.ca/apng/ (名無しさん)

[4] APNG Specification - MozillaWiki (2007-03-20 16:39:29 +09:00 版) http://wiki.mozilla.org/APNG_Specification

0.8 (名無しさん 2007-03-21 03:35:25 +00:00)

[5] Bug 257197 – Add APNG support for Mozilla (2007-03-21 12:33:07 +09:00 版) https://bugzilla.mozilla.org/show_bug.cgi?id=257197 (名無しさん)

[6] APNG・これまでの経緯 (2007-05-31 21:03:48 +09:00 版) http://tsuki.jpn.org/png/apng/ikisatsu.html (名無しさん 2007-06-15 12:20:23 +00:00)

[7] APNGメモ (2007-06-12 02:03:14 +09:00 版) http://tsuki.jpn.org/png/apng/ (名無しさん)

[8] Bug 257263 – APNG spec discussion (2007-06-15 21:20:06 +09:00 版) https://bugzilla.mozilla.org/show_bug.cgi?id=257263 (名無しさん)

[9] PNG Group animation proposal comparison + test-software (2007-05-08 23:45:22 +09:00 版) http://gjuyn.xs4all.nl/pnganim.html (名無しさん)

[10] Innnards: MNG is dead, long live APNG (2007-06-14 23:51:18 +09:00 版) http://www.boutell.com/innards/apng.html (名無しさん)

[11] >>6 いろいろ考えさせられますなあ。 (名無しさん 2007-06-15 12:31:43 +00:00)

[12] Vladimir Vukićević » Blog Archive » APNG or maybe not PNG? (2007-06-15 21:29:53 +09:00 版) http://blog.vlad1.com/archives/2007/04/26/143/ (名無しさん)

[13] Latest topics > Mozilla/Firefoxが好きだけど嫌いな理由 - outsider reflex (Piro(SHIMODA Hiroshi) 著, 2007-06-15 20:41:06 +09:00 版) http://piro.sakura.ne.jp/latest/blosxom/mozilla/misc/2007-06-13_policy.htm (名無しさん 2007-06-15 12:34:55 +00:00)

[14] A blog? with Σαιτω - APNG (2007-09-21 11:17:49 +09:00 版) http://d.hatena.ne.jp/saiton/20070917/1189991548 (名無しさん)

[15] APNG Update - Anne’s Weblog (2007-09-21 14:50:23 +09:00 版) http://annevankesteren.nl/2007/09/apng-update (名無しさん)

[16] A blog? with Σαιτω - APNG ( 版) http://d.hatena.ne.jp/saiton/20070927/1190883470

[17] Mozilla Labs » Blog Archive » Better animations in Firefox 3 ( 版) http://labs.mozilla.com/2007/08/better-animations-in-firefox-3/

[18] APNG Feature Detection | Elijah Grey ( 版) http://eligrey.com/2009/03/03/apng-feature-detection/

[19] Suggested changes to APNG 1.0 Specification ( 版) http://philip.html5.org/docs/apng/changes.html

[20] APNG Specification - MozillaWiki ( ( 版)) https://wiki.mozilla.org/APNG_Specification

[21] APNG - the animated PNG ( ( 版)) http://web.archive.org/web/20110902000118/http://animatedpng.com/

[22] APNG - Wikipedia, the free encyclopedia ( ( 版)) http://en.wikipedia.org/wiki/APNG

[23] PNG and MNG/JNG image formats: home site / Mailing Lists ( ( 版)) http://sourceforge.net/p/png-mng/mailman/message/131482/

[24] Can I use... Support tables for HTML5, CSS3, etc ( ( 版)) http://caniuse.com/#search=apng

[25] Animated PNG's - APNGs.com ( ( 版)) http://web.archive.org/web/20110701061420/http://apngs.com/

[26] Animated PNGs are dead and will never return. ( ( 版)) http://apngs.com/

[27] Bug 43828 – Safari APNG support ( ( 版)) https://bugs.webkit.org/show_bug.cgi?id=43828

[31] Bug 17022 – Add APNG support ( ( 版)) https://bugs.webkit.org/show_bug.cgi?id=17022

[32] [webkit-efl] APNG support? ( ( 版)) https://lists.webkit.org/pipermail/webkit-efl/2014-August/000628.html

[33] Let's consider APNG support once again. - Google グループ ( ( 版)) https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/2xvXNJMsgxc

[34] Issue 1171 - chromium - Request for enhancement: APNG (animated PNG) - An open-source project to help move the web forward. - Google Project Hosting ( ( 版)) https://code.google.com/p/chromium/issues/detail?id=1171

[35] APNG - Opera Forums ( ( 版)) http://forums.opera.com/discussion/1833849/apng/p1

[37] 1160200 – Add image/apng MIME type so it can be used with `picture` type switching. ( 版) https://bugzilla.mozilla.org/show_bug.cgi?id=1160200

[40] 1171 - Request for enhancement: APNG (animated PNG) - chromium - Monorail () https://bugs.chromium.org/p/chromium/issues/detail?id=1171

[41] 437662 - Support for Animated PNG - chromium - Monorail () https://bugs.chromium.org/p/chromium/issues/detail?id=437662

[42] Issue 2386453003: WIP: Implement APNG - Code Review () https://codereview.chromium.org/2386453003/

[43] Issue 1567053002: Animated PNG implementation - Code Review () https://codereview.chromium.org/1567053002/

[45] Re: [whatwg] Moving PNG Extensions to WhatWG (Domenic Denicola著, ) https://lists.w3.org/Archives/Public/public-whatwg-archive/2016Dec/0028.html

[46] 1171 - Request for enhancement: APNG (animated PNG) - chromium - Monorail ( ()) https://bugs.chromium.org/p/chromium/issues/detail?id=1171

[47] APNG (animated PNG) images support [Firefox and Safari 8 support it] – Welcome to the Windows developer feedback site! ( ()) https://wpdev.uservoice.com/forums/257854-microsoft-edge-developer/suggestions/6513393-apng-animated-png-images-support-firefox-and-sa

[48] Intent to Implement: Animated PNG - Google グループ ( ()) https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/KcMjmFOgG2w

[50] APNG · Issue #58 · w3c/strategy () https://github.com/w3c/strategy/issues/58

[51] PNG and MNG/JNG image formats: home site / Mailing Lists () https://sourceforge.net/p/png-mng/mailman/png-mng-misc/thread/CA%2BJGUxSCb-kvVS_w-7G5kVkCGsJZHw%3Dtfgtd1UAu9rxdAUvKKA%40mail.gmail.com/

[52] PNG and MNG/JNG image formats: home site / Mailing Lists () https://sourceforge.net/p/png-mng/mailman/png-mng-misc/thread/CA%2BPdXcutiut4XyfRmW4kWbbJ96sYOQxffczTU1MKck8z2w%2BYjA%40mail.gmail.com/

[53] #whatwg
2017/05/29 04:55:50 (crissov)

Hi everyone! I'm still considering to volunteer as an editor for a PNG or APNG Living Standard at WhatWG

[54] Crissov/PNG-extensions: Proposals for extending the (A)PNG specification () https://github.com/Crissov/PNG-extensions

[55] APNG - MozillaWiki () https://wiki.mozilla.org/APNG

[56] PNG and MNG/JNG image formats: home site / Thread: [png-mng-misc] Call for informal discussion: APNG () https://sourceforge.net/p/png-mng/mailman/png-mng-misc/thread/fa3adedb-5d2c-c892-4ae4-ef928270e542%40w3.org/#msg36039389

From: Chris Lilley <chris@w3...> - 2017-09-14 23:31:59

[57] 706679 - APNG image support and the browser accept header - chromium - Monorail () https://bugs.chromium.org/p/chromium/issues/detail?id=706679

[58] TwitterにアニメーションPNGを投稿できたのは不具合だった ~修正され非サポートに - 窓の杜 (株式会社インプレス著, ) https://forest.watch.impress.co.jp/docs/news/1226366.html

[59] Terra Informatica Software, Inc., , https://web.archive.org/web/20110101081723/http://www.terrainformatica.com/htmlayout/logfile.whtm