[FFmpeg-devel] [PATCH] configure: Change license required for NewTek SDK

[Tomas Härdin]

On 2018-02-14 13:50, Kyle Schwarz wrote:
> On Wed, Feb 14, 2018 at 7:45 AM, Hendrik Leppkes <h.leppkes at gmail.com> wrote:
>> On Wed, Feb 14, 2018 at 1:32 PM, Kyle Schwarz <zeranoe at gmail.com> wrote:
>>> On Wed, Feb 14, 2018 at 7:20 AM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>>>> 2018-02-14 13:12 GMT+01:00 Kyle Schwarz <zeranoe at gmail.com>:
>>>>> On Wed, Feb 14, 2018 at 6:54 AM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>>>>>> 2018-02-14 12:21 GMT+01:00 Kyle Schwarz <zeranoe at gmail.com>:
>>>>>> Sorry, I wasn't immediately able to find the sources for the
>>>>>> ndi library: Please post a link.
>>>>> The only official way I know to get the SDK is by providing them with
>>>>> an email when selecting "Download": https://www.newtek.com/ndi/sdk/
>>>> Do you have the sources that allow to build the library "ndi" (that
>>>> FFmpeg links against), to change it and redistribute it?
>>> No, the library comes pre built in the SDK.
>> If you need to link against a proprietary binary, then the resulting
>> binary is no longer GPL compatible, and as such non-free, no matter
>> the license of the headers.
> Good to know, thanks for clearing this up. Sounds like NewTek might be
> a little confused about this:
> https://ffmpeg.zeranoe.com/forum/viewtopic.php?f=42&p=13238#p13238

This applies only to the CLI. The libraries are LGPL, so things may be 
different there depending on how things are packaged/linked. The LGPL 
permits distributing proprietary object files such that a functioning 
library may be linked together. See 
https://www.gnu.org/licenses/gpl-faq.en.html#LGPLStaticVsDynamic

/Tomas