I have/had a need to do some converting of Movies from AAC to AC3 because my Receiver doesn't support AAC and I didn't want to run any dockers or fancy apps. I just wanted to do some basic coding and have some magic work for me. I couldn't really find a solution until I found this discussion yesterday.
https://askubuntu.com/questions/700896/how-do-i-transcode-all-files-in-a-directory-with-ffmpeg
Great now the above gave me an idea on how to convert a bunch of files, but I still