@Tuukka: FFmpeg's native AAC encoder came out of experimental stage in
December 2015 :
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=d9791a8656b5580756d5b7ecc315057e8cd4255e
This doesn't solve the issue with patents, though.

2017-05-31 8:13 GMT+02:00 Tuukka Pasanen <pasanen.tuu...@gmail.com>:

> Hello,
>
> *"AAC is full of bombs but there is FFMpeg class (which is not used)
> support for encoding this and it's not that bad to implement if FFmpeg is
> added as hard dependency of Mixxx."*
>
> @Tuukka "Full of bombs" regarding the license or
> implementation/integration?
>
> AAC license is pretty problematic. As they allow any usage, stream and
> creating AAC they do not allow binary distribution of AAC encoder/decoder
> because of the license. Many FFmpeg binaries comes with AAC enable but they
> are 'illegal' to do so. Problem is solved with h.264 (video codec) that way
> Cisco purchased license and allowed everyone to use it without a cost.
> So having AAC enable and not fearing getting into court is my opinion full
> of bombs. Nothing forces us not to develop AAC streaming which can be
> enable by advanced user but patents that involve AAC are expiring in couple
> of years so after that I don't know.
> I think it would easiest to have FFmpeg as encoder for everything first
> and then enable it as decoder. Then this AAC thing would be trivial. Just
> replace libraries with AAC enabled ones.
> or go with old good Mixxx way you just add libfaac in and then you have
> AAC.
>
> Sincerely,
> Tuukka
>
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