#!/bin/bash
#
hr="-i /mp3/Time/HRS$(date +%H)_O.mp3"
#
[[ $(date +%M) != "00" ]] && {
   hr+=" -i /mp3/Time/MIN$(date +%M).mp3 -filter_complex [0:a][1:a]concat=n=2:v=0:a=1"
}
#
ffmpeg -loglevel quiet -re ${hr} -vn -content_type audio/mpeg -f mp3 \
       icecast://source:hackme1080@localhost:1080/stream
#