[FFmpeg-devel] [RFC v4] libbavcodec: add a native decoder for the Daala video codec

[Rostislav Pehlivanov]

>To the very best of my knowledge you are allowed
>to relicense code that was published under a two-
>(or three-) clause BSD license under the GPL (and
>the LGPL) as long as you keep the copyright
>notice.

Yes, that's what I've concluded as well.
Basically, the license says:
>Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
Which means as long as I keep all the copyright notice of previous
contributors (e.g. Copyright 2001-2015 Xiph.org) I am allowed to change the
license. I was under the impression I was unable to remove the BSD license

So for the next RFC I'll just use the project's LGPL license, which is what
I prefer.

Thanks for the help.

On 2 January 2016 at 00:41, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Rostislav Pehlivanov <atomnuker <at> gmail.com> writes:
>
> > Fair enough, I will leave only the BSD-2 clause license
> > and I'll put the files as an exception when I send the
> > decoder as another RFC.
>
> This would be fine but please see below: If you prefer
> the LGPL, please use it!
>
> > Ronald has agreed to review the decoder (on a technical
> > side of things) if he has time this weekend so I'll wait
> > for him to try to finish his review.
>
> Sounds great to me!
>
> > In any case, can you check out ./libavcodec/mips/aac* ?
> > They have both the BSD license and the FFmpeg license at
> > the top, which is what I did. If that's not valid then
> > we should probably consider doing something about that.
>
> You are right that there is something (imo very) wrong;-(
>
> > >but as said please choose one license and use (only)
> > >the one you choose for the newly added files.
> >
> > I would have used the LGPL license but unfortunately
> > since there are no specifications and only a reference
> > decoder I had to reuse parts of it (DCT and PVQ parts
> > of the code) and although you can argue that really
> > there is no other way to actually write a decoder the
> > BSD license states that whatever happens to the code
> > the license needs to stay.
>
> To the very best of my knowledge you are allowed
> to relicense code that was published under a two-
> (or three-) clause BSD license under the GPL (and
> the LGPL) as long as you keep the copyright
> notice.
>
> Carl Eugen
>
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