#!/bin/sh

#ffmpegAudioMerge.sh "*.m4a"

P=$1; N=0; FS="";

for f in $P; do

        N=$((N+1))

        FS="$FS -i \"$f\""

echo $f

done

cmd="ffmpeg \

$FS \

-filter_complex 'concat=n=$N:v=0:a=1[a]' -map '[a]' \

all.m4a"

echo $cmd

eval $cmd