Create high quality mp3 from bandcamp wav files

convert.sh

#!/bin/bash

# Set input folder (current directory)
INPUT_DIR="$(pwd)"
COVER_IMAGE="$INPUT_DIR/cover.jpg"
OUTPUT_DIR="$INPUT_DIR/mp3_output"

# Create output directory if it doesn't exist
mkdir -p "$OUTPUT_DIR"

# Count total number of wav files
TOTAL_TRACKS=$(ls "$INPUT_DIR"/*.wav | wc -l)

# Loop through all .wav files in the folder
for wav_file in "$INPUT_DIR"/*.wav; do
    # Get the base filename without extension
    base_name="$(basename -- "$wav_file" .wav)"
    
    # Extract metadata using awk
    artist=$(echo "$base_name" | awk -F ' - ' '{print $1}')
    album=$(echo "$base_name" | awk -F ' - ' '{print $2}')
    track_number_title=$(echo "$base_name" | awk -F ' - ' '{print $3}')
    
    # Extract track number (first word) and track title (remaining words)
    track_number=$(echo "$track_number_title" | awk '{print $1}')
    track_title=$(echo "$track_number_title" | cut -d ' ' -f2- | tr '[:upper:]' '[:lower:]')
    
    track_total="$track_number of $TOTAL_TRACKS"
    output_file="$OUTPUT_DIR/$track_title.mp3"
    
    echo "Converting: $wav_file -> $output_file"
    echo "  Artist: $artist"
    echo "  Album: $album"
    echo "  Track #: $track_number ($track_total)"
    echo "  Title: $track_title"
    
    # Run ffmpeg conversion with metadata and embedded cover art
    ffmpeg -i "$wav_file" -i "$COVER_IMAGE" -map 0:a -map 1:v -c:v mjpeg -b:a 320k \
        -id3v2_version 3 -metadata artist="$artist" -metadata album="$album" \
        -metadata track="$track_number/$TOTAL_TRACKS" -metadata title="$track_title" "$output_file"

done

echo "Conversion complete. MP3 files saved in $OUTPUT_DIR"