| 149 | | !VisualOn AAC encoding library. Requires ffmpeg configuration with `--enable-libvo-aacenc`. This has the advantage of not being non-free, and is included by some distributors, but is a rather poor encoder compared to `libfdk_aac` and even the native FFmpeg AAC encoder according to [http://d.hatena.ne.jp/kamedo2/20120729/1343545890 Quality Assessment of FFmpeg AAC] and [http://ffmpeg.org/pipermail/ffmpeg-devel/2013-June/144589.html a mailing list post]. This encoder supports up to 2 channels, is CBR only, and does not work with `-q:a`/`-qscale:a`. |