I'm not sure, but it may be excluded on purpose, since gstreaemr-libav has its own aac encoder:
libav: avenc_aac: libav AAC (Advanced Audio Coding) encoder
I'm not sure, but it may be excluded on purpose, since gstreaemr-libav has its own aac encoder:
libav: avenc_aac: libav AAC (Advanced Audio Coding) encoder