Restore metadata for files created using Ultimate Vocal Remover GUI - more details here: https://github.com/Anjok07/ultimatevocalremovergui/issues/394#issuecomment-1854286668

metadata.sh

#!/bin/bash

# Loop over all files in the current directory with the format "{number}_{filename}_(Instrumental).flac"
for file in *.flac; do
    # Extract the filename without the number and '(Instrumental)' part
    filename=$(echo "$file" | sed -E 's/^[0-9]+_(.*)_\(Instrumental\)\.flac/\1/')

    # Construct the path of the matching file in the parent directory
    parent_file="../${filename}.flac"

    # Check if the parent file exists
    if [ -f "$parent_file" ]; then
        # Copy the metadata from the parent file to the current file
        # Requires 'ffmpeg' to be installed
        ffmpeg -i "$file" -i "$parent_file" -map 0 -map_metadata 1 -c copy "temp_$file"
        mv "temp_$file" "$file"
    else
        echo "Matching file for '$file' not found in parent directory."
    fi
done

filebot -rename *.flac --format "{artist} - {album} - {pi.pad(2)} - {t}" --db ID3