[Bug 60316] Allow image converter to reduce quality or color depth

2014-01-22 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=60316

Andre Klapper aklap...@wikimedia.org changed:

   What|Removed |Added

   Priority|Unprioritized   |Normal
Version|unspecified |1.23-git
   Severity|normal  |enhancement

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[Bug 60316] Allow image converter to reduce quality or color depth

2014-01-22 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=60316

--- Comment #1 from Tim Starling tstarl...@wikimedia.org ---
I think the idea is to postprocess the article HTML in MobileFrontend to
replace the img src attributes with ones that include a quality class
parameter. Obviously we want to keep the number of quality classes small for
optimal cache hit ratio -- I suggested two classes, Yuri suggested three. I
showed Yuri a few images scaled with various quality parameters. It seems that
for JPEG, ImageMagick -quality 30 is roughly what he is thinking, for a
low-quality class.

I'm not sure how devices would be assigned to quality classes, or whether the
carrier would influence quality class choice. I suppose feature phones known to
lack support for 3G etc. would be given low quality images.

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