(registered 2015-08-04, last updated 2015-08-04) Name : Marcos Caceres Email : mcaceres&mozilla.com MIME media type name : Image MIME subtype name : Vendor Tree - vnd.mozilla.apng Required parameters : None Optional parameters : None Encoding considerations : binary Security considerations : The security considerations for this type are the same as for image/png. The additional chunk types defined for this PNG variant do not create any additional security considerations. Interoperability considerations : An APNG stream is a normal PNG stream as defined in the PNG Specification, with three additional chunk types describing the animation and providing additional frame data. To be recognized as an APNG, an `acTL` chunk must appear in the stream before any `IDAT` chunks. The `acTL` structure is described in the reference below. Published specification : https://wiki.mozilla.org/APNG_Specification Applications which use this media : Web browsers, image processors Fragment identifier considerations : none Restrictions on usage : none Provisional registration? (standards tree only) : Yes. Additional information : 1. Deprecated alias names for this type : None 2. Magic number(s) : 137 80 78 71 13 10 26 10 3. File extension(s) : apng, png 4. Macintosh file type code : None 5. Object Identifiers: None See: https://bugzilla.mozilla.org/show_bug.cgi?id=1160200 Person to contact for further information : 1. Name : Stuart Parmenter 2. Email : pavlov&pavlov.net Intended usage : Common It is intended to be a replacement for simple animated images that have traditionally used the GIF format, while adding support for 24-bit images and 8-bit transparency. APNG is a simpler alternative to MNG, providing a spec suitable for the most common usage of animated images on the Internet. Author/Change controller : Stuart Parmenter Vladimir Vukicevic Andrew Smith