Re: Call for informal discussion: APNG

On 2017-09-14 08:51 PM, Glenn Randers-Pehrson wrote:
> It really only needs two things to get my vote.  That is to recommend
> the extension .apng instead of .png
> in the filenames, and to define a different MIME type.  In fact,
> mozilla has pursued the separation of apng
> from png to the extent of recommending a different internet mime type.
> They registered image/vnd.mozilla.apng
> (see http://www.iana.org/assignments/media-types/image/vnd.mozilla.apng) in 2015
> but then decided they didn't like that, and put in the APNG spec:
> "APNG can be identified using
> the image/apng MIME type." without anyone's approval, with someone

Ah, the good ol' standardized by coercion. I like it :)

> stating in the
> bugzilla report words to the effect, "we'll deal with IANA later".
>
>
> On Thu, Sep 14, 2017 at 7:09 PM, Chris Lilley <[email protected]> wrote:
>> This is a call for informal discussion on APNG - specifically, the three
>> chunks acTL, fcTL, and fdAT.
>>
>> These chunks have been discussed before, and voted on before. Per the rules
>> for registration:
>>
>>   The same chunk cannot be brought up again for another discussion
>>   period and vote either until a 180-day waiting period has elapsed, to
>>   allow for implementation and testing, or until a substantial change
>>   to the specification is made.
>>
>> APNG failed voting on 20 April 2007, which is more than 180 days ago:
>>
>> FAILED
>> APNG 20070405a
>> ftp://ftp.simplesystems.org/pub/png-group/documents/
>> png-apng-proposal-20070405a.txt
>>
>> Voting has closed on the APNG proposal.  There were 8 YES
>> votes, 10 NO votes, no abstentions, and no ineligble votes
>> cast.  The proposal has failed and the APNG chunks are not
>> registered.
>>
>> My reason for re-opening discussion is the "implementation and testing"
>> part. APNG has since become widespread. Compared to animated GIF, it offers
>> 24bit (and 48bit!) colors rather than 256, and full transparency rather than
>> binary opacity.
>>
>> Regardless of what we may think about the reduced capabilities relative to
>> MNG, or the advisability of re-using an image type for animations, this is
>> the current state of the world and it seems sub-optimal to me that the PNG
>> specification and extensions documents continue to not reflect this. I would
>> like therefore to kick off informal discussion, then a formal discussion
>> period and (re)vote.
>>
>> APNG continues to be supported in Mozilla Firefox (and other apps using the
>> Gecko rendering engine), starting from version 3, June 2008.
>>
>> APNG is supported by Safari (and other apps using the WebKit rendering
>> engine) since version 8, October 2014.
>>
>> In addition, native apps on MacOS X and iOS use native support for APNG,
>> since iOS 10 and OS X Yosemite, October 2014.
>>
>> APNG is now supported by Google Chrome (and other apps using the Blink
>> rendering engine, such as Opera and Samsung Internet), starting from version
>> 59, June 2017.
>>
>> Microsoft Edge does not support APNG, but MS Edge Devs stated that this is
>> "under review". Meanwhile, APNG displays in Edge as the first frame, which
>> is the expected fallback behavior.
>>
>> A starter document is attached to facilitate discussion.
>>
>> --
>> Chris Lilley
>> @svgeesus
>> Technical Director @ W3C
>> W3C Strategy Team, Core Web Design
>> W3C Architecture & Technology Team, Core Web & Media
>>
>>
>> ------------------------------------------------------------------------------
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>> _______________________________________________
>> png-mng-misc mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/png-mng-misc
>>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> png-mng-misc mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/png-mng-misc


------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot