- Multiple-image Network Graphics
Multiple-image Network Graphics Filename extension
Internet media type
Type of format computer animation Container for PNG, JNG Extended from PNG
MNG is closely related to the PNG image format. When PNG development started in early 1995, developers decided not to incorporate support for animation, not least because this feature of GIF was seldom used at the time. However, work soon started on MNG as an animation-supporting version of PNG. Version 1.0 of the MNG specification was released on January 31, 2001.
MNG is currently not as widely supported as PNG. Nonetheless, Gwenview has native MNG support, and MNG plugins are available for most web browsers. Mozilla browsers and Netscape 6.0, 6.01 and 7.0 included native support for MNG until the code was removed in 2003 due to code size and little actual usage, causing complaints on the Mozilla development site. As a result, a MNGzilla project was started to offer patched Mozilla and Firefox browsers. By contrast, Firefox supports MNG rival APNG natively.
Neither Internet Explorer, Opera, nor Safari currently support MNG natively. Recent Sony Ericsson phones support MNG files in their themes. The Sphere game engine supports the use of MNG files for animations. GIMP can export images as MNG files. Imagemagick can create a MNG file from a series of PNG files. If MPlayer is linked against libmng, MPlayer and thus all graphical front-ends like KMPlayer and Gnome MPlayer can display MNG files.
Type Application Native support Plugin Image processing
Gamani GIF Movie Gear Unknown Unknown Gnome MPlayer Yes - GIMP Partial - Gwenview Yes - KMPlayer Yes - Konvertor Yes - ImageMagick Yes - MPlayer Yes - XnView Yes - Web browsers Gecko-based Iceweasel and other rebranded Mozilla products by the Debian project No Unknown Mozilla Firefox up to 2003 Yes Mozilla Application Suite up to 2003 Unknown Mozilla SeaMonkey No Unknown KHTML-based Konqueror Yes - Presto-based Opera No Yes Trident-based Internet Explorer No Yes WebKit-based Epiphany No Unknown Google Chrome/Chromium No Unknown Midori No Unknown Safari No Unknown Mobile phones Sony Ericsson support MNG files in their themes Yes - other Sphere game engine Yes -
The MNG developers hope that in time MNG will begin to replace GIF for animated images on the World Wide Web, just as PNG has already begun to do for still images. However, with the expiration of LZW patents and existence of alternative file formats such as Flash and SVG, combined with lack of MNG supporting viewers and services, web usages were far less than expected.
The structure of MNG files is essentially the same as that of PNG files, differing only in the slightly different signature (
8A 4D 4E 47 0D 0A 1A 0Ain hexadecimal, where
4D 4E 47is ASCII for "MNG" – see Portable Network Graphics: File header) and the use of a much greater variety of chunks to support all the animation features that it provides. Images to be used in the animation are stored in the MNG file as encapsulated PNG or JNG images.
Two versions of MNG of reduced complexity are also defined: MNG-LC (low complexity) and MNG-VLC (very low complexity). These allow applications to include some level of MNG support without having to implement the entire MNG specification, just as the SVG standard offers the "SVG Basic" and "SVG Tiny" subsets.
MNG can either be lossy or lossless, depending whether the frames are encoded in PNG (lossless) or JNG (lossy).
- ^ Bug 195280 – Removal of MNG/JNG support
- ^ Bug 18574 – restore support for MNG animation format and JNG image format
- ^ "This is an open source project to develop a patch to restore MNG/JNG support to Mozilla. - 'MNGZILLA' MNGzilla Sourceforge website. Retrieved 6 December 2010.
- ^ "Animated PNG graphics - MDC Doc Center". 4 July 2008. https://developer.mozilla.org/en/Animated_PNG_graphics. Retrieved 6 December 2010.
- ^ From Tutorials and Reference section of site
- ^ http://meta.wikimedia.org/wiki/Help:Images_and_other_uploaded_files
- ^ https://help.lycos.com/kb_article.php?ref=4470-EIHB-9773
- ^ MNG (Multiple-image Network Graphics) Home Page
- MNG Home Page
- List of browsers that support MNG images
- MNGzilla - An attempt to create a Mozilla variant that has MNG support included
- MNG testcases
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