Retiring the OpenJPEG (jp2) plugin

[Boudewijn Rempt]

On Tue, 2 Aug 2016, Alvin Wong wrote:

> jpeg2000 isn't only used for movies though... I heard that medical
> images use them too. 

That seems to be one of the main uses, but, well, medical uses isn't
really what Krita is for. And if it were, DCIM would be more important.
(And having done work with dcim, I have to say that it's something
I never want to meet again.)

> I heard that it has the ability to save in
> dynamic range and in 16-bit, in both lossy and lossless formats with
> really good compression, which sounds pretty nice for exporting Krita
> sketches in.
> 
> But it seems to lack mainstream support, so I never actually looked
> into more details.
> 
> It might be a good format for storing images when the original .kra
> isn't needed...
> 
> Alvin
> 
> 2016-08-02 17:28 GMT+08:00 Fazekas László <mneko at freemail.hu>:
> > Honestly I had no idea yet that Krita can use jpeg2000... Actually it's the
> > picture format of the movie frames inside the DCP format (with XYZ color
> > space). However, DCP is a final export format for cinema projection but it's
> > very hard to play in real time without special hardware. I think it's not
> > really used for compositing and animation. At least that's what I see. So I
> > think it's safe to remove.
> >
> > What would be better to support for animation is the DPX format. It's
> > uncompressed, the native capture format of the BMD cards and I think it's
> > widely used in high quality digital video/cinema projects, like color
> > grading.
> >
> > Fazek
> >
> > 2016-08-02 10:58 keltezéssel, Boudewijn Rempt írta:
> >>
> >> Hi,
> >>
> >> We've had an openjpeg plugin for nearly a decade. However, the plugin
> >> is based on openjpeg 1.5, and does not build with 2.0, We do not build
> >> the plugin on Windows and OSX, though that has become possible with the
> >> patch at https://phabricator.kde.org/D2332 . There is one further problem
> >> with the plugin: on the platforms where it's built (Linux distribution
> >> packages), its only function seems to be to confuse people who think
> >> they are saving to jpeg.
> >>
> >> I want to propose to delete the plugin altogether instead of spending
> >> time and effort to update it and teaching users the difference between
> >> jp2 and jpg.
> >>
> >> I've put out a quick user poll on twitter asking people whether they
> >> would want to use the format (since most people haven't had access
> >> to the plugin anyway:
> >> https://twitter.com/Krita_Painting/status/760399095542448128
> >>
> >
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-- 
Boudewijn Rempt | http://www.krita.org, http://www.valdyas.org