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Can static and animated GIF scaling be separated?
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Description

Please turn static GIF scaling back on without turning the problematic animated GIF scaling back on with it.

Please see:
http://commons.wikimedia.org/wiki/Commons:Graphics_village_pump#Can_static_GIF_scaling_be_separated_from_animated_GIF_scaling.3F

Static GIF resizing worked well for years. But it was turned off due to problems with animated GIF scaling. It seems from previous discussions that animated GIF scaling is very complex and problematic to do well. It also is a resource hog. So it gets turned on and off due to all the problems.

There is no need for static GIF resizing to be turned off. Static GIF scaling shouldn't be held hostage for more months and years by the on-and-off problems with animated GIF scaling.

To understand some of the history see also the previous talk sections in the linked discussion. That longtime discussion has more info and links about the problems and solutions.


Version: unspecified
Severity: major

Details

Reference
bz22505

Event Timeline

bzimport raised the priority of this task from to Medium.Nov 21 2014, 10:58 PM
bzimport set Reference to bz22505.
bzimport added a subscriber: Unknown Object (MLST).

See some of the problem of doing without scaled static GIF images:
http://commons.wikimedia.org/wiki/Category:Octave_Uzanne

There are also many charts, graphs, tables, and diagrams.

Related to bug #22041, after which all GIF scaling was disabled.

Bryan.TongMinh wrote:

Add werdna to cc, he did some stuff about GIFs iirc.

Bryan.TongMinh wrote:

Has this been fixed now?

camjsb7j9g wrote:

Yes, static GIFs are now rescaling. For examples: http://commons.wikimedia.org/wiki/Category:Octave_Uzanne now renders correctly; 640 pixel wide http://commons.wikimedia.org/wiki/File:Ophangingsarmen_Diagram.gif now rescales to 400 inside http://nl.wikipedia.org/wiki/Geschiedenis_van_de_auto_%281905-1918%29 . I have tested other examples on wikibooks and it.wikipedia. Animated GIF rescaling has also been turned on but mediawiki is now delivering scaled down thumbnails of animated GIFs too.

For future readers, any remaining issues with improving the handling of animated GIF thumbnailing is now discussed in bug 23063.