[FFmpeg-devel] Support master branch of OpenJPEG and Grok J2K codecs
nfxjfg at googlemail.com
Mon Apr 4 13:13:52 CEST 2016
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
> despite the licenses otherwise not allowing relicensing under the terms of
> each other.
> In this way, the copyleft of each license is relaxed to allow distributing
> such combinations. "
> 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.
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