dkaac reads linear PCM audio in either WAV, raw PCM, or CAF format,
and encodes it into either M4A / AAC file.

If the input file is "-", data is read from stdin. Likewise, if the
output file is "-", data is written to stdout if one of streamable AAC
transport formats are selected by **-f**.

When CAF input and M4A output is used, tags in CAF file are copied into
the resulting M4A.

github.com/nu774/fdkaac
github.com/mstorsjo/fdk-aac
launchpad.net/ubuntu/bionic/+package/fdkaac
packages.debian.org/stretch/fdkaac