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Documentation: Add FAQ regarding MP3 patents
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sideshowbarker
2024-07-17 05:44:03 +09:00
Author: https://github.com/kleinesfilmroellchen Commit: https://github.com/SerenityOS/serenity/commit/2d4591dad4 Pull-request: https://github.com/SerenityOS/serenity/pull/15616
@ -37,3 +37,12 @@ No, SerenityOS does not have a package manager. The project uses a monorepo appr
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*However* there are ports which can be found in the [Ports directory](../Ports). A port is a piece of software that can optionally be installed, might not have been built by us, but supports running on SerenityOS. They act quite similarly to packages, each coming with their own install script.
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Currently when running the system in a virtual machine, ports need to be cross compiled on the host, and added to the file system image before booting. Then it's also possible to configure the build system to [in- or exclude components](./AdvancedBuildInstructions.md#component-configuration) from a build.
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## Why is there an MP3 implementation in SerenityOS if MP3 is protected by patents?
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*This section is informational; we are not lawyers and this is not legal advice. Consult a qualified lawyer if you have legal questions regarding your use of SerenityOS software.*
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MP3 was indeed originally protected by patents, preventing certain uses of the format. All MP3 patents, however, have expired since at least 2017, depending on where a specific patent was registered. Therefore, we believe it to be completely legal to implement MP3 as 2-clause BSD licensed software without acquiring patent licenses.
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*However*, this does not apply to many other multimedia formats, such as the popular H.264 (AVC) and H.265 (HEVC) video codecs or the JPEG 2000 image format. As long as there is any reason to believe that a format is covered by patents, there will not be an implementation in the SerenityOS monorepo, as we believe this to be incompatible with the BSD 2-clause license in general. *However however*, third-party ports with differing licenses can provide implementations for these formats, such as ffmpeg. Depending on your situation and/or use case, using this third-party software might not be legal (for example, see the [ffmpeg information on the same topic](https://ffmpeg.org/legal.html)). Everything regarding the legal situation of the SerenityOS code is handled by [our license](../LICENSE), everything regarding the legal situation of third-party code is handled by the license of the particular software.
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