code.delx.au - transcoding/blob - rip-audio

   1 #!/bin/bash
   2
   3 MPLAYER="mplayer"
   4 FFMPEG="ffmpeg"
   5
   6 if [ -z "$1" ]; then
   7     echo "Usage: $0 filename"
   8     exit 1
   9 fi
  10
  11 INPUT="$1"
  12
  13 acodec="$(
  14     "$MPLAYER" -identify -vo null -ao null -frames 0 "$INPUT" |
  15     grep ID_AUDIO_CODEC |
  16     cut -d= -f2
  17 )"
  18 if [ "$acodec" = "ffaac" ]; then
  19     ext=".m4a"
  20 else
  21     echo "Unknown audio codec! $acodec"
  22     exit 1
  23 fi
  24
  25 OUTPUT="$(basename "$INPUT" | sed 's/\.[a-zA-Z1-9]*$//')${ext}"
  26 "$FFMPEG" -i "$INPUT" -vn -acodec copy "$OUTPUT"
  27