audio2video.sh

#!/bin/bash

image_name=$(od -A n -t d -N 1 /dev/urandom)


#Replace unused string in caption ( extension dot)
caption=$(echo $1 | sed -r 's/_/ /g;s/\./ /g; s/mp3//gI; s/m4a//gI')

convert -background black -size 800x480 -fill "#ff0080"  -pointsize 72 -gravity center caption:"$caption" $image_name.png
ffmpeg -loop 1 -r ntsc -i $image_name.png -i "$1" -c:a copy -c:v libx264 -preset fast -threads 0 -shortest "$1".mkv

# convert m4a to mp3
#find . -type f -name '*.m4a' -exec bash -c 'avconv -i "$0" "${0/%m4a/mp3}"' '{}' \;

# rename
# for f in *; do mv "$f" "`echo $f | sed s/.mix_MP3WRAP//`"; done