[FFmpeg-devel] Support master branch of OpenJPEG and Grok J2K codecs

[Aaron Boxer]

On Mon, Apr 4, 2016 at 7:13 AM, wm4 <nfxjfg at googlemail.com> wrote:

> On Sun, 3 Apr 2016 17:31:25 -0400
> Aaron Boxer <boxerab at gmail.com> wrote:
>
> > Hi Folks,
> >
> > Here is a small patch to get FFmpeg working with both OpenJPEG master and
> > Grok master, for J2K support.  The comment on the commit has all of the
> > details; the main change is to remove the OPJ_STATIC flag from configure,
> > so that FFmpeg can be configured with a dynamic build of both codecs.
> >
> > I also want to reiterate that because FFmpeg can be distributed under GPL
> > v3, and Grok is licensed under the AGPL, there are no licensing issues
> > regarding distributing FFmpeg together with Grok.
> >
> > Quoting from Wikipedia:
> >
> > "By contrast, GPLv3 and AGPLv3 each include clauses (in section 13 of
> each
> > license) that together achieve a form of mutual compatibility for the two
> > licenses. These clauses explicitly allow the "conveying
> > <https://en.wiktionary.org/wiki/convey#Verb>" of a work formed by
> linking
> > code licensed under the one license against code licensed under the other
> > license,[3]
> > <https://en.wikipedia.org/wiki/Affero_General_Public_License#cite_note-3
> >
> > despite the licenses otherwise not allowing relicensing under the terms
> of
> > each other.[4]
> > <
> https://en.wikipedia.org/wiki/Affero_General_Public_License#cite_note-fsf2-4
> >
> > In this way, the copyleft of each license is relaxed to allow
> distributing
> > such combinations.[4] "
> > <
> https://en.wikipedia.org/wiki/Affero_General_Public_License#cite_note-fsf2-4
> >
> >
> > So, this patch will expand the choice of J2K codecs for all users who use
> > FFmpeg under the GPLv3 license.
>
> AGPL is evil. That alone warrants creating a better, actually free
> version of the decoder.
>

The only difference between AGPL and GPL is the proviso that users
connecting to a program using AGPL code
must be provided with the full source code for the program. This is to
close the loophole in the GPL where
someone can take free software, put it in the "cloud", and then treat it as
closed, non-free software, because they
do not have to distribute modifications.

Please explain why you think this is a Bad Thing (TM)  ?




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