Changes between Version 8 and Version 9 of Encode/AAC


Ignore:
Timestamp:
Mar 2, 2013, 2:08:27 AM (6 years ago)
Author:
MarkZV
Comment:

clarify meaning of "non-free"

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  • Encode/AAC

    v8 v9  
    55[[http://en.wikipedia.org/wiki/Advanced_Audio_Coding|Advanced Audio Coding (AAC)]] is the successor format to MP3, and is defined in MPEG-4 part 3 (ISO/IEC 14496-3). It is often used within an MP4 container format; for music the .m4a extension is customarily used. The second-most common use is within MKV (Matroska) files because it has better support for embedded text-based soft subtitles than MP4. The examples in this guide will use the extensions MP4 and M4A.
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    7 FFmpeg can support four AAC-LC encoders (`aac`, `libfaac`, `libfdk_aac`, `libvo_aacenc`) and two AAC-HE encoders (`libaacplus` and `libfdk_aac`). `libaacplus`, `libfaac`, and `libfdk_aac` are considered "non-free", and are therefore non-redistributable, meaning you may have trouble finding a build that supports these. Of course you can resolve this by [[CompilationGuide|compiling ffmpeg]].
     7FFmpeg can support four AAC-LC encoders (`aac`, `libfaac`, `libfdk_aac`, `libvo_aacenc`) and two AAC-HE encoders (`libaacplus` and `libfdk_aac`). Although they are all open source, the licenses of `libaacplus`, `libfaac`, and `libfdk_aac` do not provide every freedom of the GPL license (used by other libraries commonly used with ffmpeg), and it is therefore believed that the GPL does not permit redistribution of binaries containing code licensed under these licenses when GPL-licensed code is also included. Therefore these encoders have been designated as "non-free", and you may have trouble finding a pre-built ffmpeg that supports them. This can be resolved by [[CompilationGuide|compiling ffmpeg]].
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