gallery-dl/docs/gallery-dl.conf

{
    "base-directory": "/tmp/",
    "downloader":
    {
        "http":
        {
            "retries": 5,
            "timeout": null
        }
    },
    "extractor":
    {
        "pixiv":
        {
            "user":
            {
                "directory": ["{category}", "{artist-id}"]
            },
            "bookmark":
            {
                "directory": ["{category}", "my bookmarks"]
            },
            "ugoira": true,
            "username": null,
            "password": null
        },
        "batoto":
        {
            "username": null,
            "password": null
        },
        "exhentai":
        {
            "wait-min": 3,
            "wait-max": 6,
            "original": true,
            "username": null,
            "password": null
        },
        "nijie":
        {
            "username": null,
            "password": null
        },
        "seiga":
        {
            "username": null,
            "password": null
        },
        "gelbooru":
        {
            "filename": "{category}_{id:>07}_{md5}.{extension}"
        }
    }
}