Playlistinator

Rebuilds M3U playlists from a directory of music files, allowing you to swap out songs for the higher-quality versions you have elsewhere.

The purpose of this is to allow downloading and updating a Spotify playlist using spotdl and then replacing the songs in your local library with the higher-quality versions you downloaded.

The Patches File

The patches file is a JSON file that contains a list of patches. Each patch contains a source and a target - the source being the relative path to the file you want to replace, and the target being the relative path to the file.

So, for the following m3u:

path/to/source1.mp3
path/to/source2.mp3

... if you wanted to replace source1.mp3 with target.mp3, you would write this into a patch file:

[
    {
        "source": "path/to/source1.mp3",
        "target": "path/to/target.mp3"
    }
]