$ dpkg -l libshout*
ii  libshout3                        2.2.2-8
ii  libshout3-dev                    2.2.2-8

$ grep SHOUT_FORMAT /usr/include/shout/shout.h 
#define SHOUT_FORMAT_OGG	(0)
#define SHOUT_FORMAT_MP3	(1)
#define SHOUT_FORMAT_VORBIS	SHOUT_FORMAT_OGG
/* takes a SHOUT_FORMAT_xxxx argument */

No signs of AAC. I have a vague memory of this coming up before, and I think aac support was never released, or only in someone's personal git repo on github or so.

Hey Tim,

maybe only libshout is not capable of streaming AAC, but icecast2 itself is.

I will try to figure this out.

I've contacted libshout developers. Currently libshout has no support for AAC but there are patches and people willing to contribute such functionality. I will confirm in July if this is going to work.

There's also https://github.com/codders/libshout .

Any changes in libshout in the meantime?