Discussion on: How to cut an mp3 file into multiple audios with bash and ffmpeg according to a timetable.

#!/bin/bash
# split.sh

TIMETABLE="timetable.txt"
INPUT="input.mp3"
NUM=0

while getopts t:i: option 
do
  case "${option}" 
  in
    t) TIMETABLE=${OPTARG};;
    i) INPUT=${OPTARG};;
  esac
done

while read CMD; do
  let NUM=NUM+1
  START=$(echo "$CMD" | awk '{printf("00:%s", $1)}')
  END=$(echo "$CMD" | awk '{printf("00:%s", $3)}')
  FILENAME=$(printf "%02d" $NUM).$(echo "$CMD" | awk -f filename.awk)
  ffmpeg -i "$INPUT" -ss "$START" -t "$END" -acodec copy "$FILENAME"
done < "$TIMETABLE"

# filename.awk
{
  for (i=4; i < NF; i++) {
    gsub(/[\.,]/, "", $i)
    if (i < NF-1) printf("%s_", $i)
    else printf("%s", $i)
  }
  printf(".mp3")
}