MP4 (AAC) to MOV

set -e
origdir="./original"
shopt -s extglob nullglob
if [ ! -d "$origdir" ];
then
    echo "Creating $origdir directory."
    mkdir "$origdir"
fi
for vid in *.MP4; do  
 noext="${vid%.MP4}"    
 ffmpeg -i "$vid" -acodec pcm_s16le -vcodec copy "${noext// /_}.mov"
    mv "$vid" "$origdir"
done

https://github.com/schorschii/nemo-extensions/tree/master/action-convert-davinci