The FDK AAC encoder included in Android.

The licensed AAC encoder that is included in Winamp.

Fraunhofer AAC Encoders See Fraunhofer.įraunhofer IIS develops two related AAC encoders:

Libav also recommends using FDK AAC if it is available. These encoders are LGPL-licensed open-source and can be built for any platform that the FFmpeg or Libav frameworks can be built.īoth FFmpeg and Libav can use the Fraunhofer FDK AAC library via libfdk-aac, and while the FFmpeg native encoder has become stable and good enough for common use, FDK is still considered the highest quality encoder available for use with FFmpeg. Libav has not merged this work and continues to use the older version of the AAC encoder. A significant amount of work was done for the 3.0 release of FFmpeg (February 2016) to make its version usable and competitive with the rest of the AAC encoders. The native AAC encoder created in FFmpeg, and forked with Libav, was considered experimental and poor. įFmpeg/Libav native AAC encoder See Libavcodec AAC. Only 44.1kHz and 48kHz sample rates supported.

Only 2 channels in Windows 7, 6(5.1) in Windows 10. VisualOn claims to have the right to release the code under a Free Software license. Can be extracted and used with a CLI wrapper.įAAC contains some code which is published as Free Software, but as a whole it is only distributed under a proprietary license.ĬBR is actually a really poor VBR at about 64kbps with lots of padding added to hit whatever target is requested. Can be extracted and used with a CLI wrapper.įraunhofer dumps its code into the Android Open Source Project now and then, but it is not developed in the open, and its license is considered non-free.ĭistributed as binary library only, included in Winamp. Distributed as binary library only, included in QuickTime/iTunes.

Ffmpeg encoders