[FFmpeg-devel] [Question] Are there any legal or patenting issues concerning the AC-4 patches?

Nomis101 Nomis101 at web.de
Tue Jun 1 09:51:50 EEST 2021


Am 31.05.21 um 20:54 schrieb Lynne:
> May 31, 2021, 19:59 by Nomis101 at web.de:
>
>> Hi everyone. Back in March 2020 a set of patches for AC-4 support into FFmpeg was posted on this
>> list. As these patches are not integrated in FFmpeg the HandBrake team was considering if we should
>> add them to the internal FFmpeg patches for HandBrake. We are aware, that this patches are WIP and
>> that there are maybe still some technical weak points.
>> But, we would like to clarify if there are any legal or patenting issues with this patches? Would
>> this patches be compatible with the GPLv2 license of HandBrake? We don't want to come into any kind
>> of cease and desist situation.
>>
>
> No, it's just that the decoder still has some issues with one of its QMF synthesis
> filters, and the developer seems busy right now to fix it. The spec is very
> long, very obtuse, and very annoying.
> The decoder will be lgpl like the rest of our code. We really can't care less
> about patents (we don't read them either, they're all useless), and C&Ds
> aren't really worth the paper they're printed on in Europe, so we've been left
> alone, hopefully for the future too.
> ___

Thank you very much for your detailed answer, that was very helpful.





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