Topic: Should libfdk-aac remain in Hyperbola?
FSF and Fedora consider it freely licensed while Debian does not.
I removed it from my system alongside gst-plugins-bad (I already removed webkitgtk as it depends on enchant and I needed a newer version of it for subtitleeditor and a recompiled claws-mail works with the newer version of enchant as well).
Incidentally, Avidemux (which can use libfdk-aac) can use a few other free audio codecs - aften and dcaenc from AUR. After installing those, recompiling avidemux from Hyperbola's repo produces a version of Avidemux that can use these codecs.