spectro.sh

#!/bin/bash
set -e

# spectro.sh: creates forum code with spectrograms of a directory's flac files
# Deps: sox, optipng and curl
# Usage: spectro.sh location/of/album/

APIKEY="6bf8cf819aff12a"
SOXARGS=(
  "remix 1 spectrogram -x 3000 -y 513 -w Kaiser"
  "remix 1 spectrogram -x 3000 -y 513 -w Kaiser -S 0:40 -d 0:04"
)

if [ $# -gt 0 ]; then
  cd "$@"
fi

function create_spectrogram {
  sox "$2" -n $1 -h -t "$2" -o "$2.spectrogram.png"
  optipng -quiet "$2.spectrogram.png"
  response=$(curl -H "Authorization: CLIENT-ID $APIKEY" -F "image=@$2.spectrogram.png" \
    https://api.imgur.com/3/image.xml 2>/dev/null)
  url=$(echo $response | sed -r 's/.*<link>(.*)<\/link>.*/\1/')
  rm "$2.spectrogram.png"
  echo "$url"
}

echo "[hide=Spectrograms]"
for f in *.flac; do
  echo "  $f:"
  for soxarg in "${SOXARGS[@]}"; do
    echo "    [img]"$(create_spectrogram "$soxarg" "$f")"[/img]"
  done
done
echo "[/hide]"