Convert m4a to ogg with ffmpeg

Dec 5, 2017

One minute read

Recently i downloaded some lectures from youtube in m4a format. My hardware portable player doesn’t support it so I converted files like this:

ffmpeg -i file.m4a -acodec libvorbis -aq 4 -vn -ac 2 -map_metadata 0 file.ogg

Complete script is:

#!/bin/bash
# Author: Simon Legner <Simon.Legner@gmail.com>

convert () {
  in="$1"
  out="${in%.m4a}.ogg"
  ffmpeg -i "$in" \
    -acodec libvorbis -aq 4 -vn -ac 2 \
    -map_metadata 0 \
    "$out"
}

if [[ $# == 0 ]]; then
  echo Converts m4a files to Ogg Vorbis using ffmpeg.
  echo Usage: $0 file1.m4a file2.m4a ... fileN.m4a
  echo ... produces file1.ogg file2.ogg ... fileN.ogg
fi

for i in "$@"; do
  convert "$i"
done

Tags: linux ffmpeg m4a ogg

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