copy_ffmpeg() {
  codec=/opt/vivaldi/lib/libffmpeg.so

  if [ ! -f "${codec}.orig" -a -f "${codec}" ]; then
    echo Backing up original libffmpeg.so
    sudo mv $codec "${codec}.orig"
  fi

  echo Installing new libffmpeg.so...
  sudo mv /usr/share/vivaldi-codecs/libffmpeg.so $codec
}

post_install() {
  copy_ffmpeg
}

post_upgrade() {
  copy_ffmpeg
}