Created attachment 27 [details]
There was a previous request to switch from neroAacEnc to FAAC in bug 28 but that was just a request.
theJPster emailed me a patch (attached) to switch to fdk-aac instead.
From what I can tell it's a good encoder and it's licenced with a non-standard open-source licence which reads fine to me.
Also fdk-aac seems to be included in distributions.
I'll see how much work will be needed to integrate this patch.
Patch checked in. Not sure why VBR is not supported, but otherwise it seems to work great.