[FFmpeg-user] Does "cat" degrade video quality?

Reindl Harald h.reindl at thelounge.net
Mon Jan 2 14:20:22 EET 2023

Am 02.01.23 um 11:34 schrieb pehache:
> Le 01/01/2023 à 19:21, Reindl Harald a écrit :
>> Am 01.01.23 um 19:16 schrieb pehache:
>>>> Couldn't I, or
>>>> anyone else, just edit the license check code out then?
>>> Indeed yes in the case of a free software (but no in the case of 
>>> MakeMKV)
>> when the source code is available *you can* and the only thing you 
>> mustn't do is distiribute the results 
> That's correct
>> as you must not distribute ffmpeg binaries built with the "wrong" 
>> configure options
> What do you mean?


The ffmpeg build distributed by Flathub is illegal. It included a 
copyright violation. You're not allowed to distribute binaries built 
with --enable-nonfree. In this case, it probably means removing fdk-aac 
and replacing it with another aac encoder (like the one built into 
ffmpeg itself).



OpenCORE and VisualOn libraries are under the Apache License 2.0 (see 
http://www.apache.org/licenses/LICENSE-2.0 for details), which is 
incompatible to the LGPL version 2.1 and GPL version 2. You have to 
upgrade FFmpeg’s license to LGPL version 3 (or if you have enabled GPL 
components, GPL version 3) by passing --enable-version3 to configure in 
order to use it.

The license of the Fraunhofer AAC library is incompatible with the GPL. 
Therefore, for GPL builds, you have to pass --enable-nonfree to 
configure in order to use it. To the best of our knowledge, it is 
compatible with the LGPL.

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