Convert MP3 Audio To MP4 Video With Image Thumb Background.

script.sh

#!/bin/bash

# INSTALL FFMPEG BEFORE EXECUTE THIS SCRIPT

in=/path/directory/audios/
out=/path/directory/videos/
image=/path/image.png

for file in `ls $in`
do
    ffmpeg -loop 1 -i $image -i $in/$file -c:a copy -c:v libx264 -shortest $out/${file/mp3/mp4}
done