Commit 0796feb changed the default audio codec from libfdk_aac to aac
However on Ubuntu Xenial, the repo supplied ffmpeg reports
[aac @ 0xa40a60] The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.
This can easily be bypassed by doing
Before running the script, but in an ideal world you shouldn't have to.
Version of ffmpeg is
ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
Need to implement a check so that libfdk_aac can be used by default if needed.