ffmpeg

• Remove the first seconds (15 seconds in the example) of an audio file, without re-encoding, useful to remove silences at the beginning

  ffmpeg -ss 00:00:15 -i {input} -c:a copy {output}
  

• Convert m4a (or other format) to mp3. It's a bad idea, unless the input is flac or you need the file in mp3 for an old hardware player.

  ffmpeg -i {input}.m4a -b:a 192K -vn {output}.mp3
  

• Tag Music using ffmpeg

  This Script modifies the file metadata taking three arguments: input filename, artist and title.

  tag.sh

  #!/bin/bash
  ffmpeg -i "$1" -map_metadata -1 -c copy "$1_.opus"
  rm "$1"
  ffmpeg -i "$1_.opus" -metadata artist="$2" -metadata title="$3" -c copy "$2 - $3.opus"
  rm "$1_.opus"
  

  Example:

  tag.sh "The Beatles - Yesterday.mp3" "The Beatles" "Yesterday"
  

• Convert files in recursive directories

  find . -type f -iname '*.opus' | xargs -I{} env i='{}' bash -c 'ffmpeg -i "$i" -vn "${i%.*}.flac"'
  

linux command music

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