Am 10.12.2015 17:10 schrieb "Andreas Cadhalpun" < andreas.cadhal...@googlemail.com>: > > On 10.12.2015 16:49, Hendrik Leppkes wrote: > > On Thu, Dec 10, 2015 at 4:25 PM, Andreas Cadhalpun > > <andreas.cadhal...@googlemail.com> wrote: > >> The GPL-3 requires that the 'Corresponding Source' of the distributed object code > >> is also distributed. This is defined as [1]: > >> The “Corresponding Source” for a work in object code form means all the source > >> code needed to generate, install, and (for an executable work) run the object > >> code[...] > >> For example, Corresponding Source includes [...] the source code for [...] > >> dynamically linked subprograms that the work is specifically designed to require, > >> such as by intimate data communication or control flow between those subprograms > >> and other parts of the work. > >> > > > > This rule does not apply to system libraries, > > Yes. > > > which I still am quite > > sure a hardware driver would fall under (and we can argue about that > > all day, you won't get any "proof" either way) > > If a particular system does not actually package this particular > > library, then their distribution of FFmpeg should probably just not > > enable nvenc, its of no use without the library anyway. > > But if it did, it would certainly not fall under the system library exception. > If that's the only thing that allows distribution of compiled nvenc.c, > it shouldn't be enabled by default. >
I don't mind disabling it by default, if that alleviates some concerns. > > You could argue the same thing for QuickSync, the only difference is > > that it depends on some sort of "dispatcher" library that sits between > > FFmpeg and the closed-source library. > > Yes, that looks like a similar problem. > > > Does the existence of a tiny dispatcher library suddenly "fix" these > > rules? > > I don't think so, but I haven't looked at the code. > > > That would be silly. Yet it is widely accepted that linking > > against libmfx for qsv is fine. > > If it is 'widely accepted' that distribution of the resulting object > code is GPL compatible, then you can certainly provide links > to statements from experts saying so, e.g. from someone from the FSF. > Unless you do, 'widely accepted' is a void argument. > > Best regards, > Andreas > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
