gallery-dl/docs/configuration.rst

Configuration
#############

| Configuration files for *gallery-dl* use a JSON-based file format.
| For a (more or less) complete example with options set to their default values,
  see `gallery-dl.conf <gallery-dl.conf>`__.
| For a configuration file example with more involved settings and options,
  see `gallery-dl-example.conf <gallery-dl-example.conf>`__.
|

This file lists all available configuration options and their descriptions.


Contents
========

1) `Extractor Options`_
2) `Extractor-specific Options`_
3) `Downloader Options`_
4) `Output Options`_
5) `Postprocessor Options`_
6) `Miscellaneous Options`_
7) `API Tokens & IDs`_


Extractor Options
=================


Each extractor is identified by its ``category`` and ``subcategory``.
The ``category`` is the lowercase site name without any spaces or special
characters, which is usually just the module name
(``pixiv``, ``danbooru``, ...).
The ``subcategory`` is a lowercase word describing the general functionality
of that extractor (``user``, ``favorite``, ``manga``, ...).

Each one of the following options can be specified on multiple levels of the
configuration tree:

================== =======
Base level:        ``extractor.<option-name>``
Category level:    ``extractor.<category>.<option-name>``
Subcategory level: ``extractor.<category>.<subcategory>.<option-name>``
================== =======

A value in a "deeper" level hereby overrides a value of the same name on a
lower level. Setting the ``extractor.pixiv.filename`` value, for example, lets
you specify a general filename pattern for all the different pixiv extractors.
Using the ``extractor.pixiv.user.filename`` value lets you override this
general pattern specifically for ``PixivUserExtractor`` instances.

The ``category`` and ``subcategory`` of all extractors are included in the
output of ``gallery-dl --list-extractors``. For a specific URL these values
can also be determined by using the ``-K``/``--list-keywords`` command-line
option (see the example below).


extractor.*.filename
--------------------
Type
    ``string`` or ``object``
Example
    * .. code:: json

        "{manga}_c{chapter}_{page:>03}.{extension}"

    * .. code:: json

        {
            "extension == 'mp4'": "{id}_video.{extension}",
            "'nature' in title" : "{id}_{title}.{extension}",
            ""                  : "{id}_default.{extension}"
        }

Description
    A `format string`_ to build filenames for downloaded files with.

    If this is an ``object``, it must contain Python expressions mapping to the
    filename format strings to use.
    These expressions are evaluated in the order as specified in Python 3.6+
    and in an undetermined order in Python 3.4 and 3.5.

    The available replacement keys depend on the extractor used. A list
    of keys for a specific one can be acquired by calling *gallery-dl*
    with the ``-K``/``--list-keywords`` command-line option.
    For example:

    .. code::

        $ gallery-dl -K http://seiga.nicovideo.jp/seiga/im5977527
        Keywords for directory names:
        -----------------------------
        category
          seiga
        subcategory
          image

        Keywords for filenames:
        -----------------------
        category
          seiga
        extension
          None
        image-id
          5977527
        subcategory
          image

    Note: Even if the value of the ``extension`` key is missing or
    ``None``, it will be filled in later when the file download is
    starting. This key is therefore always available to provide
    a valid filename extension.


extractor.*.directory
---------------------
Type
    ``list`` of ``strings`` or ``object``
Example
    * .. code:: json

        ["{category}", "{manga}", "c{chapter} - {title}"]

    * .. code:: json

        {
            "'nature' in content": ["Nature Pictures"],
            "retweet_id != 0"    : ["{category}", "{user[name]}", "Retweets"],
            ""                   : ["{category}", "{user[name]}"]
        }

Description
    A list of `format strings`_ to build target directory paths with.

    If this is an ``object``, it must contain Python expressions mapping to the
    list of format strings to use.

    Each individual string in such a list represents a single path
    segment, which will be joined together and appended to the
    base-directory_ to form the complete target directory path.


extractor.*.base-directory
--------------------------
Type
    |Path|_
Default
    ``"./gallery-dl/"``
Description
    Directory path used as base for all download destinations.


extractor.*.parent-directory
----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Use an extractor's current target directory as
    `base-directory <extractor.*.base-directory_>`__
    for any spawned child extractors.


extractor.*.parent-metadata
---------------------------
Type
    ``bool`` or ``string``
Default
    ``false``
Description
    If ``true``, overwrite any metadata provided by a child extractor
    with its parent's.

    | If this is a ``string``, add a parent's metadata to its children's
      to a field named after said string.
    | For example with ``"parent-metadata": "_p_"``:

    .. code:: json

        {
            "id": "child-id",
            "_p_": {"id": "parent-id"}
        }


extractor.*.parent-skip
-----------------------
Type
    ``bool``
Default
    ``false``
Description
    Share number of skipped downloads between parent and child extractors.


extractor.*.path-restrict
-------------------------
Type
    ``string`` or ``object``
Default
    ``"auto"``
Example
    * ``"/!? (){}"``
    * ``{" ": "_", "/": "-", "|": "-", ":": "-", "*": "+"}``
Description
    | A string of characters to be replaced with the value of
      `path-replace <extractor.*.path-replace_>`__
    | or an object mapping invalid/unwanted characters to their replacements
    | for generated path segment names.

    Special values:

    * ``"auto"``: Use characters from ``"unix"`` or ``"windows"``
      depending on the local operating system
    * ``"unix"``: ``"/"``
    * ``"windows"``: ``"\\\\|/<>:\"?*"``
    * ``"ascii"``: ``"^0-9A-Za-z_."``

    Note: In a string with 2 or more characters, ``[]^-\`` need to be
    escaped with backslashes, e.g. ``"\\[\\]"``


extractor.*.path-replace
------------------------
Type
    ``string``
Default
    ``"_"``
Description
    The replacement character(s) for
    `path-restrict <extractor.*.path-restrict_>`__


extractor.*.path-remove
-----------------------
Type
    ``string``
Default
    ``"\u0000-\u001f\u007f"`` (ASCII control characters)
Description
    Set of characters to remove from generated path names.

    Note: In a string with 2 or more characters, ``[]^-\`` need to be
    escaped with backslashes, e.g. ``"\\[\\]"``


extractor.*.path-strip
----------------------
Type
    ``string``
Default
    ``"auto"``
Description
    Set of characters to remove from the end of generated path segment names
    using `str.rstrip() <https://docs.python.org/3/library/stdtypes.html#str.rstrip>`_

    Special values:

    * ``"auto"``: Use characters from ``"unix"`` or ``"windows"``
      depending on the local operating system
    * ``"unix"``: ``""``
    * ``"windows"``: ``". "``


extractor.*.extension-map
-------------------------
Type
    ``object``
Default
    .. code:: json

        {
            "jpeg": "jpg",
            "jpe" : "jpg",
            "jfif": "jpg",
            "jif" : "jpg",
            "jfi" : "jpg"
        }
Description
    A JSON ``object`` mapping filename extensions to their replacements.


extractor.*.skip
----------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Controls the behavior when downloading files that have been
    downloaded before, i.e. a file with the same filename already
    exists or its ID is in a `download archive <extractor.*.archive_>`__.

    * ``true``: Skip downloads
    * ``false``: Overwrite already existing files

    * ``"abort"``: Stop the current extractor run
    * ``"abort:N"``: Skip downloads and stop the current extractor run
      after ``N`` consecutive skips

    * ``"terminate"``: Stop the current extractor run, including parent extractors
    * ``"terminate:N"``: Skip downloads and stop the current extractor run,
      including parent extractors, after ``N`` consecutive skips

    * ``"exit"``: Exit the program altogether
    * ``"exit:N"``: Skip downloads and exit the program
      after ``N`` consecutive skips

    * ``"enumerate"``: Add an enumeration index to the beginning of the
      filename extension (``file.1.ext``, ``file.2.ext``, etc.)


extractor.*.sleep
-----------------
Type
    |Duration|_
Default
    ``0``
Description
    Number of seconds to sleep before each download.


extractor.*.sleep-extractor
---------------------------
Type
    |Duration|_
Default
    ``0``
Description
    Number of seconds to sleep before handling an input URL,
    i.e. before starting a new extractor.


extractor.*.sleep-request
-------------------------
Type
    |Duration|_
Default
    ``0``
Description
    Minimal time interval in seconds between each HTTP request
    during data extraction.


extractor.*.username & .password
--------------------------------
Type
    ``string``
Default
    ``null``
Description
    The username and password to use when attempting to log in to
    another site.

    Specifying a username and password is required for

    * ``nijie``
    * ``seiga``

    and optional for

    * ``aryion``
    * ``danbooru`` (*)
    * ``e621`` (*)
    * ``exhentai``
    * ``idolcomplex``
    * ``imgbb``
    * ``inkbunny``
    * ``instagram``
    * ``kemonoparty``
    * ``mangadex``
    * ``mangoxo``
    * ``pillowfort``
    * ``sankaku``
    * ``seisoparty``
    * ``subscribestar``
    * ``tapas``
    * ``tsumino``
    * ``twitter``

    These values can also be specified via the
    ``-u/--username`` and ``-p/--password`` command-line options or
    by using a |.netrc|_ file. (see Authentication_)

    (*) The password value for ``danbooru`` and ``e621`` should be
    the API key found in your user profile, not the actual account password.


extractor.*.netrc
-----------------
Type
    ``bool``
Default
    ``false``
Description
    Enable the use of |.netrc|_ authentication data.


extractor.*.cookies
-------------------
Type
    |Path|_ or ``object``
Default
    ``null``
Description
    Source to read additional cookies from. Either as

    * the |Path|_ to a Mozilla/Netscape format cookies.txt file or
    * a JSON ``object`` specifying cookies as a name-to-value mapping

      Example:

      .. code:: json

        {
            "cookie-name": "cookie-value",
            "sessionid"  : "14313336321%3AsabDFvuASDnlpb%3A31",
            "isAdult"    : "1"
        }


extractor.*.cookies-update
--------------------------
Type
    ``bool``
Default
    ``true``
Description
    If `extractor.*.cookies`_ specifies the |Path|_ to a cookies.txt
    file and it can be opened and parsed without errors,
    update its contents with cookies received during data extraction.


extractor.*.proxy
-----------------
Type
    ``string`` or ``object``
Default
    ``null``
Description
    Proxy (or proxies) to be used for remote connections.

    * If this is a ``string``, it is the proxy URL for all
      outgoing requests.
    * If this is an ``object``, it is a scheme-to-proxy mapping to
      specify different proxy URLs for each scheme.
      It is also possible to set a proxy for a specific host by using
      ``scheme://host`` as key.
      See `Requests' proxy documentation`_ for more details.

      Example:

      .. code:: json

        {
            "http" : "http://10.10.1.10:3128",
            "https": "http://10.10.1.10:1080",
            "http://10.20.1.128": "http://10.10.1.10:5323"
        }

    Note: All proxy URLs should include a scheme,
    otherwise ``http://`` is assumed.


extractor.*.user-agent
----------------------
Type
    ``string``
Default
    ``"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"``
Description
    User-Agent header value to be used for HTTP requests.

    Note: This option has no effect on `pixiv` extractors,
    as these need specific values to function correctly.


extractor.*.browser
-------------------
Type
    ``string``
Default
    ``"firefox"`` for ``patreon``, ``null`` everywhere else
Example
    * ``"chrome:macos"``
Description
    Try to emulate a real browser (``firefox`` or ``chrome``)
    by using their default HTTP headers and TLS ciphers for HTTP requests.

    Optionally, the operating system used in the ``User-Agent`` header can be
    specified after a ``:`` (``windows``, ``linux``, or ``macos``).

    Note: ``requests`` and ``urllib3`` only support HTTP/1.1, while a real
    browser would use HTTP/2.


extractor.*.keywords
--------------------
Type
    ``object``
Example
    ``{"type": "Pixel Art", "type_id": 123}``
Description
    Additional key-value pairs to be added to each metadata dictionary.


extractor.*.keywords-default
----------------------------
Type
    any
Default
    ``"None"``
Description
    Default value used for missing or undefined keyword names in
    `format strings`_.


extractor.*.url-metadata
------------------------
Type
    ``string``
Default
    ``null``
Description
    Insert a file's download URL into its metadata dictionary as the given name.

    For example, setting this option to ``"gdl_file_url"`` will cause a new
    metadata field with name ``gdl_file_url`` to appear, which contains the
    current file's download URL.
    This can then be used in `filenames <extractor.*.filename_>`_,
    with a ``metadata`` post processor, etc.


extractor.*.category-transfer
-----------------------------
Type
    ``bool``
Default
    Extractor-specific
Description
    Transfer an extractor's (sub)category values to all child
    extractors spawned by it, to let them inherit their parent's
    config options.


extractor.*.blacklist & .whitelist
----------------------------------
Type
    ``list`` of ``strings``
Default
    ``["oauth", "recursive", "test"]`` + current extractor category
Example
    ``["imgur", "gfycat:user", "*:image"]``
Description
    A list of extractor identifiers to ignore (or allow)
    when spawning child extractors for unknown URLs,
    e.g. from ``reddit`` or ``plurk``.

    Each identifier can be

    * A category or basecategory name (``"imgur"``, ``"mastodon"``)
    * | A (base)category-subcategory pair, where both names are separated by a colon (``"gfycat:user"``).
      | Both names can be a `*` or left empty, matching all possible names (``"*:image"``, ``":user"``).

    Note: Any ``blacklist`` setting will automatically include
    ``"oauth"``, ``"recursive"``, and ``"test"``.


extractor.*.archive
-------------------
Type
    |Path|_
Default
    ``null``
Example
    ``"$HOME/.archives/{category}.sqlite3"``
Description
    File to store IDs of downloaded files in. Downloads of files
    already recorded in this archive file will be
    `skipped <extractor.*.skip_>`__.

    The resulting archive file is not a plain text file but an SQLite3
    database, as either lookup operations are significantly faster or
    memory requirements are significantly lower when the
    amount of stored IDs gets reasonably large.

    Note: archive paths support regular `format string`_ replacements,
    but be aware that using external inputs for building local paths
    may pose a security risk.


extractor.*.archive-format
--------------------------
Type
    ``string``
Example
    ``"{id}_{offset}"``
Description
    An alternative `format string`__ to build archive IDs with.

.. __: https://docs.python.org/3/library/string.html#format-string-syntax


extractor.*.archive-prefix
--------------------------
Type
    ``string``
Default
    ``"{category}"``
Description
    Prefix for archive IDs.


extractor.*.postprocessors
--------------------------
Type
    ``list`` of |Postprocessor Configuration|_ objects
Example
    .. code:: json

        [
            {
                "name": "zip" ,
                "compression": "store"
            },
            {
                "name": "exec",
                "command": ["/home/foobar/script", "{category}", "{image_id}"]
            }
        ]

Description
    A list of `post processors <Postprocessor Configuration_>`__
    to be applied to each downloaded file in the specified order.

    | Unlike other options, a |postprocessors|_ setting at a deeper level
      does not override any |postprocessors|_ setting at a lower level.
    | Instead, all post processors from all applicable |postprocessors|_
      settings get combined into a single list.

    For example

    * an ``mtime`` post processor at ``extractor.postprocessors``,
    * a ``zip`` post processor at ``extractor.pixiv.postprocessors``,
    * and using ``--exec``

    will run all three post processors - ``mtime``, ``zip``, ``exec`` -
    for each downloaded ``pixiv`` file.


extractor.*.retries
-------------------
Type
    ``integer``
Default
    ``4``
Description
    Maximum number of times a failed HTTP request is retried before
    giving up, or ``-1`` for infinite retries.


extractor.*.timeout
-------------------
Type
    ``float``
Default
    ``30.0``
Description
    Amount of time (in seconds) to wait for a successful connection
    and response from a remote server.

    This value gets internally used as the |timeout|_ parameter for the
    |requests.request()|_ method.


extractor.*.verify
------------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Controls whether to verify SSL/TLS certificates for HTTPS requests.

    If this is a ``string``, it must be the path to a CA bundle to use
    instead of the default certificates.

    This value gets internally used as the |verify|_ parameter for the
    |requests.request()|_ method.


extractor.*.download
--------------------
Type
    ``bool``
Default
    ``true``
Description
    Controls whether to download media files.

    Setting this to ``false`` won't download any files, but all other
    functions (`postprocessors`_, `download archive`_, etc.)
    will be executed as normal.


extractor.*.fallback
--------------------
Type
    ``bool``
Default
    ``true``
Description
    Use fallback download URLs when a download fails.


extractor.*.image-range
-----------------------
Type
    ``string``
Example
    * ``"10-20"``
    * ``"-5, 10, 30-50, 100-"``
Description
    Index-range(s) specifying which images to download.

    Note: The index of the first image is ``1``.


extractor.*.chapter-range
-------------------------
Type
    ``string``
Description
    Like `image-range <extractor.*.image-range_>`__,
    but applies to delegated URLs like manga-chapters, etc.


extractor.*.image-filter
------------------------
Type
    ``string``
Example
    * ``"width >= 1200 and width/height > 1.2"``
    * ``"re.search(r'foo(bar)+', description)"``
Description
    Python expression controlling which files to download.

    | Files for which the expression evaluates to ``False`` are ignored.
    | Available keys are the filename-specific ones listed by ``-K`` or ``-j``.


extractor.*.chapter-filter
--------------------------
Type
    ``string``
Example
    * ``"lang == 'en'"``
    * ``"language == 'French' and 10 <= chapter < 20"``
Description
    Like `image-filter <extractor.*.image-filter_>`__,
    but applies to delegated URLs like manga-chapters, etc.


extractor.*.image-unique
------------------------
Type
    ``bool``
Default
    ``false``
Description
    Ignore image URLs that have been encountered before during the
    current extractor run.


extractor.*.chapter-unique
--------------------------
Type
    ``bool``
Default
    ``false``
Description
    Like `image-unique <extractor.*.image-unique_>`__,
    but applies to delegated URLs like manga-chapters, etc.


extractor.*.date-format
-----------------------
Type
    ``string``
Default
    ``"%Y-%m-%dT%H:%M:%S"``
Description
    Format string used to parse ``string`` values of
    `date-min` and `date-max`.

    See |strptime|_ for a list of formatting directives.



Extractor-specific Options
==========================


extractor.artstation.external
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Try to follow external URLs of embedded players.


extractor.aryion.recursive
--------------------------
Type
    ``bool``
Default
    ``true``
Description
    Controls the post extraction strategy.

    * ``true``: Start on users' main gallery pages and recursively
      descend into subfolders
    * ``false``: Get posts from "Latest Updates" pages


extractor.bbc.width
-------------------
Type
    ``int``
Default
    ``1920``
Description
    Specifies the requested image width.

    This value must be divisble by 16 and gets rounded down otherwise.
    The maximum possible value appears to be ``1920``.


extractor.blogger.videos
------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download embedded videos hosted on https://www.blogger.com/


extractor.danbooru.external
---------------------------
Type
    ``bool``
Default
    ``false``
Description
    For unavailable or restricted posts,
    follow the ``source`` and download from there if possible.


extractor.danbooru.metadata
---------------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract additional metadata (notes, artist commentary, parent, children)

    Note: This requires 1 additional HTTP request for each post.


extractor.danbooru.ugoira
-------------------------
Type
    ``bool``
Default
    ``false``
Description
    Controls the download target for Ugoira posts.

    * ``true``: Original ZIP archives
    * ``false``: Converted video files


extractor.derpibooru.api-key
----------------------------
Type
    ``string``
Default
    ``null``
Description
    Your `Derpibooru API Key <https://derpibooru.org/registrations/edit>`__,
    to use your account's browsing settings and filters.


extractor.derpibooru.filter
---------------------------
Type
    ``integer``
Default
    ``56027`` (`Everything <https://derpibooru.org/filters/56027>`_ filter)
Description
    The content filter ID to use.

    Setting an explicit filter ID overrides any default filters and can be used
    to access 18+ content without `API Key <extractor.derpibooru.api-key_>`_.

    See `Filters <https://derpibooru.org/filters>`_ for details.


extractor.deviantart.auto-watch
-------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Automatically watch users when encountering "Watchers-Only Deviations"
    (requires a `refresh-token <extractor.deviantart.refresh-token_>`_).


extractor.deviantart.auto-unwatch
---------------------------------
Type
    ``bool``
Default
    ``false``
Description
    After watching a user through `auto-watch <extractor.deviantart.auto-watch_>`_,
    unwatch that user at the end of the current extractor run.


extractor.deviantart.comments
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract ``comments`` metadata.


extractor.deviantart.extra
--------------------------
Type
    ``bool``
Default
    ``false``
Description
    Download extra Sta.sh resources from
    description texts and journals.

    Note: Enabling this option also enables deviantart.metadata_.


extractor.deviantart.flat
-------------------------
Type
    ``bool``
Default
    ``true``
Description
    Select the directory structure created by the Gallery- and
    Favorite-Extractors.

    * ``true``: Use a flat directory structure.
    * ``false``: Collect a list of all gallery-folders or
      favorites-collections and transfer any further work to other
      extractors (``folder`` or ``collection``), which will then
      create individual subdirectories for each of them.

      Note: Going through all gallery folders will not be able to
      fetch deviations which aren't in any folder.


extractor.deviantart.folders
----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Provide a ``folders`` metadata field that contains the names of all
    folders a deviation is present in.

    Note: Gathering this information requires a lot of API calls.
    Use with caution.


extractor.deviantart.include
----------------------------
Type
    ``string`` or ``list`` of ``strings``
Default
    ``"gallery"``
Example
    ``"favorite,journal,scraps"`` or ``["favorite", "journal", "scraps"]``
Description
    A (comma-separated) list of subcategories to include
    when processing a user profile.

    Possible values are
    ``"gallery"``, ``"scraps"``, ``"journal"``, ``"favorite"``.

    You can use ``"all"`` instead of listing all values separately.


extractor.deviantart.journals
-----------------------------
Type
    ``string``
Default
    ``"html"``
Description
    Selects the output format of journal entries.

    * ``"html"``: HTML with (roughly) the same layout as on DeviantArt.
    * ``"text"``: Plain text with image references and HTML tags removed.
    * ``"none"``: Don't download journals.


extractor.deviantart.mature
---------------------------
Type
    ``bool``
Default
    ``true``
Description
    Enable mature content.

    This option simply sets the |mature_content|_ parameter for API
    calls to either ``"true"`` or ``"false"`` and does not do any other
    form of content filtering.


extractor.deviantart.metadata
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Request extended metadata for deviation objects to additionally provide
    ``description``, ``tags``, ``license`` and ``is_watching`` fields.


extractor.deviantart.original
-----------------------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Download original files if available.

    Setting this option to ``"images"`` only downloads original
    files if they are images and falls back to preview versions for
    everything else (archives, etc.).


extractor.deviantart.refresh-token
----------------------------------
Type
    ``string``
Default
    ``null``
Description
    The ``refresh-token`` value you get from
    `linking your DeviantArt account to gallery-dl <OAuth_>`__.

    Using a ``refresh-token`` allows you to access private or otherwise
    not publicly available deviations.

    Note: The ``refresh-token`` becomes invalid
    `after 3 months <https://www.deviantart.com/developers/authentication#refresh>`__
    or whenever your `cache file <cache.file_>`__ is deleted or cleared.


extractor.deviantart.wait-min
-----------------------------
Type
    ``integer``
Default
    ``0``
Description
    Minimum wait time in seconds before API requests.


extractor.exhentai.domain
-------------------------
Type
    ``string``
Default
    ``"auto"``
Description
    * ``"auto"``: Use ``e-hentai.org`` or ``exhentai.org``
      depending on the input URL
    * ``"e-hentai.org"``: Use ``e-hentai.org`` for all URLs
    * ``"exhentai.org"``: Use ``exhentai.org`` for all URLs


extractor.exhentai.limits
-------------------------
Type
    ``integer``
Default
    ``null``
Description
    Sets a custom image download limit and
    stops extraction when it gets exceeded.


extractor.exhentai.metadata
---------------------------
Type
    ``bool``
Default
    ``false``
Description
    Load extended gallery metadata from the
    `API <https://ehwiki.org/wiki/API#Gallery_Metadata>`_.

    Adds ``archiver_key``, ``posted``, and ``torrents``.
    Makes ``date`` and ``filesize`` more precise.


extractor.exhentai.original
---------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download full-sized original images if available.


extractor.exhentai.source
-------------------------
Type
    ``string``
Default
    ``"gallery"``
Description
    Selects an alternative source to download files from.

    * ``"hitomi"``:  Download the corresponding gallery from ``hitomi.la``


extractor.fanbox.embeds
-----------------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Control behavior on embedded content from external sites.

    * ``true``: Extract embed URLs and download them if supported
      (videos are not downloaded).
    * ``"ytdl"``: Like ``true``, but let `youtube-dl`_ handle video
      extraction and download for YouTube, Vimeo and SoundCloud embeds.
    * ``false``: Ignore embeds.


extractor.flickr.access-token & .access-token-secret
----------------------------------------------------
Type
    ``string``
Default
    ``null``
Description
    The ``access_token`` and ``access_token_secret`` values you get
    from `linking your Flickr account to gallery-dl <OAuth_>`__.


extractor.flickr.videos
-----------------------
Type
    ``bool``
Default
    ``true``
Description
    Extract and download videos.


extractor.flickr.size-max
--------------------------
Type
    ``integer`` or ``string``
Default
    ``null``
Description
    Sets the maximum allowed size for downloaded images.

    * If this is an ``integer``, it specifies the maximum image dimension
      (width and height) in pixels.
    * If this is a ``string``, it should be one of Flickr's format specifiers
      (``"Original"``, ``"Large"``, ... or ``"o"``, ``"k"``, ``"h"``,
      ``"l"``, ...) to use as an upper limit.


extractor.furaffinity.descriptions
----------------------------------
Type
    ``string``
Default
    ``"text"``
Description
    Controls the format of ``description`` metadata fields.

    * ``"text"``: Plain text with HTML tags removed
    * ``"html"``: Raw HTML content


extractor.furaffinity.external
------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Follow external URLs linked in descriptions.


extractor.furaffinity.include
-----------------------------
Type
    ``string`` or ``list`` of ``strings``
Default
    ``"gallery"``
Example
    ``"scraps,favorite"`` or ``["scraps", "favorite"]``
Description
    A (comma-separated) list of subcategories to include
    when processing a user profile.

    Possible values are
    ``"gallery"``, ``"scraps"``, ``"favorite"``.

    You can use ``"all"`` instead of listing all values separately.


extractor.generic.enabled
-------------------------
Type
    ``bool``
Default
    ``false``
Description
    Match **all** URLs not otherwise supported by gallery-dl,
    even ones without a ``generic:`` prefix.


extractor.gfycat.format
-----------------------
Type
    * ``list`` of ``strings``
    * ``string``
Default
    ``["mp4", "webm", "mobile", "gif"]``
Description
    List of names of the preferred animation format, which can be
    ``"mp4"``, ``"webm"``, ``"mobile"``, ``"gif"``, or ``"webp"``.

    If a selected format is not available, the next one in the list will be
    tried until an available format is found.

    If the format is given as ``string``, it will be extended with
    ``["mp4", "webm", "mobile", "gif"]``. Use a list with one element to
    restrict it to only one possible format.


extractor.hentaifoundry.include
-------------------------------
Type
    ``string`` or ``list`` of ``strings``
Default
    ``"pictures"``
Example
    ``"scraps,stories"`` or ``["scraps", "stories"]``
Description
    A (comma-separated) list of subcategories to include
    when processing a user profile.

    Possible values are
    ``"pictures"``, ``"scraps"``, ``"stories"``, ``"favorite"``.

    You can use ``"all"`` instead of listing all values separately.


extractor.hitomi.metadata
-------------------------
Type
    ``bool``
Default
    ``false``
Description
    Try to extract
    ``artist``, ``group``, ``parody``,  and ``characters`` metadata.


extractor.imgur.mp4
-------------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Controls whether to choose the GIF or MP4 version of an animation.

    * ``true``: Follow Imgur's advice and choose MP4 if the
      ``prefer_video`` flag in an image's metadata is set.
    * ``false``: Always choose GIF.
    * ``"always"``: Always choose MP4.


extractor.inkbunny.orderby
--------------------------
Type
    ``string``
Default
    ``"create_datetime"``
Description
    Value of the ``orderby`` parameter for submission searches.

    (See `API#Search <https://wiki.inkbunny.net/wiki/API#Search>`__
    for details)


extractor.instagram.include
---------------------------
Type
    ``string`` or ``list`` of ``strings``
Default
    ``"posts"``
Example
    ``"stories,highlights,posts"`` or ``["stories", "highlights", "posts"]``
Description
    A (comma-separated) list of subcategories to include
    when processing a user profile.

    Possible values are
    ``"posts"``, ``"reels"``, ``"channel"``, ``"tagged"``,
    ``"stories"``, ``"highlights"``.

    You can use ``"all"`` instead of listing all values separately.


extractor.instagram.videos
--------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download video files.


extractor.kemonoparty.comments
------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract ``comments`` metadata.


extractor.kemonoparty.dms
-------------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract a user's direct messages as ``dms`` metadata.


extractor.kemonoparty.files
---------------------------
Type
    ``list`` of ``strings``
Default
    ``["attachments", "file", "inline"]``
Description
    Determines the type and order of files to be downloaded.

    Available types are ``file``, ``attachments``, and ``inline``.


extractor.kemonoparty.max-posts
-------------------------------
Type
    ``integer``
Default
    ``null``
Description
    Limit the number of posts to download.


extractor.kemonoparty.metadata
------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract ``username`` metadata


extractor.khinsider.format
--------------------------
Type
    ``string``
Default
    ``"mp3"``
Description
    The name of the preferred file format to download.

    Use ``"all"`` to download all available formats,
    or a (comma-separated) list to select multiple formats.

    If the selected format is not available,
    the first in the list gets chosen (usually `mp3`).


extractor.luscious.gif
----------------------
Type
    ``bool``
Default
    ``false``
Description
    Format in which to download animated images.

    Use ``true`` to download animated images as gifs and ``false``
    to download as mp4 videos.


extractor.mangadex.api-server
-----------------------------
Type
    ``string``
Default
    ``"https://api.mangadex.org"``
Description
    The server to use for API requests.


extractor.mangadex.api-parameters
---------------------------------
Type
    ``object``
Example
    ``{"order[updatedAt]": "desc"}``
Description
    Additional query parameters to send when fetching manga chapters.

    (See `/manga/{id}/feed <https://api.mangadex.org/docs.html#operation/get-manga-id-feed>`_
    and `/user/follows/manga/feed <https://api.mangadex.org/docs.html#operation/get-user-follows-manga-feed>`_)


extractor.mangadex.lang
-----------------------
Type
    ``string``
Example
    ``"en"``
Description
    `ISO 639-1 <https://en.wikipedia.org/wiki/ISO_639-1>`_ language code
    to filter chapters by.


extractor.mangadex.ratings
--------------------------
Type
    ``list`` of ``strings``
Default
    ``["safe", "suggestive", "erotica", "pornographic"]``
Description
    List of acceptable content ratings for returned chapters.


extractor.mastodon.reblogs
--------------------------
Type
    ``bool``
Default
    ``false``
Description
    Fetch media from reblogged posts.


extractor.mastodon.replies
--------------------------
Type
    ``bool``
Default
    ``true``
Description
    Fetch media from replies to other posts.


extractor.mastodon.text-posts
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Also emit metadata for text-only posts without media content.


extractor.newgrounds.flash
--------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download original Adobe Flash animations instead of pre-rendered videos.


extractor.newgrounds.format
---------------------------
Type
    ``string``
Default
    ``"original"``
Example
    ``"720p"``
Description
    Selects the preferred format for video downloads.

    If the selected format is not available,
    the next smaller one gets chosen.


extractor.newgrounds.include
----------------------------
Type
    ``string`` or ``list`` of ``strings``
Default
    ``"art"``
Example
    ``"movies,audio"`` or ``["movies", "audio"]``
Description
    A (comma-separated) list of subcategories to include
    when processing a user profile.

    Possible values are
    ``"art"``, ``"audio"``, ``"movies"``.

    You can use ``"all"`` instead of listing all values separately.


extractor.nijie.include
----------------------------
Type
    ``string`` or ``list`` of ``strings``
Default
    ``"illustration,doujin"``
Description
    A (comma-separated) list of subcategories to include
    when processing a user profile.

    Possible values are
    ``"illustration"``, ``"doujin"``, ``"favorite"``.

    You can use ``"all"`` instead of listing all values separately.


extractor.oauth.browser
-----------------------
Type
    ``bool``
Default
    ``true``
Description
    Controls how a user is directed to an OAuth authorization page.

    * ``true``: Use Python's |webbrowser.open()|_ method to automatically
      open the URL in the user's default browser.
    * ``false``: Ask the user to copy & paste an URL from the terminal.


extractor.oauth.cache
---------------------
Type
    ``bool``
Default
    ``true``
Description
    Store tokens received during OAuth authorizations
    in `cache <cache.file_>`__.


extractor.oauth.port
--------------------
Type
    ``integer``
Default
    ``6414``
Description
    Port number to listen on during OAuth authorization.

    Note: All redirects will go to http://localhost:6414/, regardless
    of the port specified here. You'll have to manually adjust the
    port number in your browser's address bar when using a different
    port than the default.


extractor.patreon.files
-----------------------
Type
    ``list`` of ``strings``
Default
    ``["images", "attachments", "postfile", "content"]``
Description
    Determines the type and order of files to be downloaded.

    Available types are
    ``postfile``, ``images``, ``attachments``, and ``content``.


extractor.photobucket.subalbums
-------------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download subalbums.


extractor.pillowfort.external
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Follow links to external sites, e.g. Twitter,


extractor.pillowfort.inline
---------------------------
Type
    ``bool``
Default
    ``true``
Description
    Extract inline images.


extractor.pillowfort.reblogs
----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract media from reblogged posts.


extractor.pinterest.sections
----------------------------
Type
    ``bool``
Default
    ``true``
Description
    Include pins from board sections.


extractor.pinterest.videos
--------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download from video pins.


extractor.pixiv.user.avatar
---------------------------
Type
    ``bool``
Default
    ``false``
Description
    Download user avatars.


extractor.pixiv.user.metadata
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Fetch extended ``user`` metadata.


extractor.pixiv.work.related
----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Also download related artworks.


extractor.pixiv.tags
--------------------
Type
    ``string``
Default
    ``"japanese"``
Description
    Controls the ``tags`` metadata field.

    * `"japanese"`: List of Japanese tags
    * `"translated"`: List of translated tags
    * `"original"`: Unmodified list with both Japanese and translated tags


extractor.pixiv.ugoira
----------------------
Type
    ``bool``
Default
    ``true``
Description
    Download Pixiv's Ugoira animations or ignore them.

    These animations come as a ``.zip`` file containing all
    animation frames in JPEG format.

    Use an `ugoira` post processor to convert them
    to watchable videos. (Example__)

.. __: https://github.com/mikf/gallery-dl/blob/v1.12.3/docs/gallery-dl-example.conf#L9-L14


extractor.pixiv.max-posts
-------------------------
Type
    ``integer``
Default
    ``0``
Description
    When downloading galleries, this sets the maximum number of posts to get.
    A value of ``0`` means no limit.


extractor.plurk.comments
------------------------
Type
    ``bool``
Default
    ``false``
Description
    Also search Plurk comments for URLs.


extractor.reactor.gif
---------------------
Type
    ``bool``
Default
    ``false``
Description
    Format in which to download animated images.

    Use ``true`` to download animated images as gifs and ``false``
    to download as mp4 videos.


extractor.readcomiconline.captcha
---------------------------------
Type
    ``string``
Default
    ``"stop"``
Description
    Controls how to handle redirects to CAPTCHA pages.

    * ``"stop``: Stop the current extractor run.
    * ``"wait``: Ask the user to solve the CAPTCHA and wait.


extractor.reddit.comments
-------------------------
Type
    ``integer``
Default
    ``0``
Description
    The value of the ``limit`` parameter when loading
    a submission and its comments.
    This number (roughly) specifies the total amount of comments
    being retrieved with the first API call.

    Reddit's internal default and maximum values for this parameter
    appear to be 200 and 500 respectively.

    The value ``0`` ignores all comments and significantly reduces the
    time required when scanning a subreddit.


extractor.reddit.morecomments
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Retrieve additional comments by resolving the ``more`` comment
    stubs in the base comment tree.

    This requires 1 additional API call for every 100 extra comments.


extractor.reddit.date-min & .date-max
-------------------------------------
Type
    |Date|_
Default
    ``0`` and ``253402210800`` (timestamp of |datetime.max|_)
Description
    Ignore all submissions posted before/after this date.


extractor.reddit.id-min & .id-max
---------------------------------
Type
    ``string``
Example
    ``"6kmzv2"``
Description
    Ignore all submissions posted before/after the submission with this ID.


extractor.reddit.recursion
--------------------------
Type
    ``integer``
Default
    ``0``
Description
    Reddit extractors can recursively visit other submissions
    linked to in the initial set of submissions.
    This value sets the maximum recursion depth.

    Special values:

    * ``0``: Recursion is disabled
    * ``-1``: Infinite recursion (don't do this)


extractor.reddit.refresh-token
------------------------------
Type
    ``string``
Default
    ``null``
Description
    The ``refresh-token`` value you get from
    `linking your Reddit account to gallery-dl <OAuth_>`__.

    Using a ``refresh-token`` allows you to access private or otherwise
    not publicly available subreddits, given that your account is
    authorized to do so,
    but requests to the reddit API are going to be rate limited
    at 600 requests every 10 minutes/600 seconds.


extractor.reddit.videos
-----------------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Control video download behavior.

    * ``true``: Download videos and use `youtube-dl`_ to handle
      HLS and DASH manifests
    * ``"ytdl"``: Download videos and let `youtube-dl`_ handle all of
      video extraction and download
    * ``false``: Ignore videos


extractor.redgifs.format
------------------------
Type
    * ``list`` of ``strings``
    * ``string``
Default
    ``["hd", "sd", "gif"]``
Description
    List of names of the preferred animation format, which can be
    ``"hd"``, ``"sd"``, `"gif"``, `"vthumbnail"``, `"thumbnail"``, or ``"poster"``.

    If a selected format is not available, the next one in the list will be
    tried until an available format is found.

    If the format is given as ``string``, it will be extended with
    ``["hd", "sd", "gif"]``. Use a list with one element to
    restrict it to only one possible format.


extractor.sankakucomplex.embeds
-------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Download video embeds from external sites.


extractor.sankakucomplex.videos
-------------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download videos.


extractor.skeb.thumbnails
-------------------------
Type
    ``bool``
Default
    ``false``
Description
    Download thumbnails.


extractor.smugmug.videos
------------------------
Type
    ``bool``
Default
    ``true``
Description
    Download video files.


extractor.tumblr.avatar
-----------------------
Type
    ``bool``
Default
    ``false``
Description
    Download blog avatars.


extractor.tumblr.date-min & .date-max
-------------------------------------
Type
    |Date|_
Default
    ``0`` and ``null``
Description
    Ignore all posts published before/after this date.


extractor.tumblr.external
-------------------------
Type
    ``bool``
Default
    ``false``
Description
    Follow external URLs (e.g. from "Link" posts) and try to extract
    images from them.


extractor.tumblr.inline
-----------------------
Type
    ``bool``
Default
    ``true``
Description
    Search posts for inline images and videos.


extractor.tumblr.reblogs
------------------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    * ``true``: Extract media from reblogged posts
    * ``false``: Skip reblogged posts
    * ``"same-blog"``: Skip reblogged posts unless the original post
      is from the same blog


extractor.tumblr.posts
----------------------
Type
    ``string`` or ``list`` of ``strings``
Default
    ``"all"``
Example
    ``"video,audio,link"`` or ``["video", "audio", "link"]``
Description
    A (comma-separated) list of post types to extract images, etc. from.

    Possible types are ``text``, ``quote``, ``link``, ``answer``,
    ``video``, ``audio``, ``photo``, ``chat``.

    You can use ``"all"`` instead of listing all types separately.


extractor.twitter.cards
-----------------------
Type
    ``bool``
Default
    ``false``
Description
    Fetch media from `Cards <https://developer.twitter.com/en/docs/twitter-for-websites/cards/overview/abouts-cards>`__.


extractor.twitter.conversations
-------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Fetch media from all Tweets and replies in a `conversation
    <https://help.twitter.com/en/using-twitter/twitter-conversations>`__.


extractor.twitter.size
----------------------
Type
    ``list`` of ``strings``
Default
    ``["orig", "4096x4096", "large", "medium", "small"]``
Description
    The image version to download.
    Any entries after the first one will be used for potential
    `fallback <extractor.*.fallback_>`_ URLs.

    Known available sizes are
    ``4096x4096``, ``orig``, ``large``, ``medium``, and ``small``.


extractor.twitter.logout
------------------------
Type
    ``bool``
Default
    ``false``
Description
    Logout and retry as guest when access to another user's Tweets is blocked.


extractor.twitter.pinned
------------------------
Type
    ``bool``
Default
    ``false``
Description
    Fetch media from pinned Tweets.


extractor.twitter.quoted
------------------------
Type
    ``bool``
Default
    ``false``
Description
    Fetch media from quoted Tweets.


extractor.twitter.replies
-------------------------
Type
    ``bool``
Default
    ``true``
Description
    Fetch media from replies to other Tweets.

    If this value is ``"self"``, only consider replies where
    reply and original Tweet are from the same user.


extractor.twitter.retweets
--------------------------
Type
    ``bool``
Default
    ``false``
Description
    Fetch media from Retweets.

    If this value is ``"original"``, metadata for these files
    will be taken from the original Tweets, not the Retweets.


extractor.twitter.text-tweets
-----------------------------
Type
    ``bool``
Default
    ``false``
Description
    Also emit metadata for text-only Tweets without media content.

    This only has an effect with a ``metadata`` (or ``exec``) post processor
    with `"event": "post" <metadata.event_>`_
    and appropriate `filename <metadata.filename_>`_.


extractor.twitter.twitpic
-------------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract `TwitPic <https://twitpic.com/>`__ embeds.


extractor.twitter.users
-----------------------
Type
    ``string``
Default
    ``"timeline"``
Example
    ``"https://twitter.com/search?q=from:{legacy[screen_name]}"``
Description
    | Format string for user URLs generated from
      ``following`` and ``list-members`` queries,
    | whose replacement field values come from Twitter ``user`` objects
      (`Example <https://gist.githubusercontent.com/mikf/99d2719b3845023326c7a4b6fb88dd04/raw/275b4f0541a2c7dc0a86d3998f7d253e8f10a588/github.json>`_)

    Special values:

    * ``"timeline"``: ``https://twitter.com/i/user/{rest_id}``
    * ``"media"``: ``https://twitter.com/id:{rest_id}/media``

    Note: To allow gallery-dl to follow custom URL formats, set the blacklist__
    for ``twitter`` to a non-default value, e.g. an empty string ``""``.

.. __: `extractor.*.blacklist & .whitelist`_


extractor.twitter.videos
------------------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Control video download behavior.

    * ``true``: Download videos
    * ``"ytdl"``: Download videos using `youtube-dl`_
    * ``false``: Skip video Tweets


extractor.unsplash.format
-------------------------
Type
    ``string``
Default
    ``"raw"``
Description
    Name of the image format to download.

    Available formats are
    ``"raw"``, ``"full"``, ``"regular"``, ``"small"``, and ``"thumb"``.


extractor.vsco.videos
---------------------
Type
    ``bool``
Default
    ``true``
Description
    Download video files.


extractor.wallhaven.api-key
---------------------------
Type
    ``string``
Default
    ``null``
Description
    Your `Wallhaven API Key <https://wallhaven.cc/settings/account>`__,
    to use your account's browsing settings and default filters when searching.

    See https://wallhaven.cc/help/api for more information.


extractor.weasyl.api-key
------------------------
Type
    ``string``
Default
    ``null``
Description
    Your `Weasyl API Key <https://www.weasyl.com/control/apikeys>`__,
    to use your account's browsing settings and filters.


extractor.weibo.retweets
------------------------
Type
    ``bool``
Default
    ``true``
Description
    Fetch media from retweeted posts.

    If this value is ``"original"``, metadata for these files
    will be taken from the original posts, not the retweeted posts.


extractor.weibo.videos
----------------------
Type
    ``bool``
Default
    ``true``
Description
    Download video files.


extractor.ytdl.enabled
----------------------
Type
    ``bool``
Default
    ``false``
Description
    Match **all** URLs, even ones without a ``ytdl:`` prefix.


extractor.ytdl.format
---------------------
Type
    ``string``
Default
    youtube-dl's default, currently ``"bestvideo+bestaudio/best"``
Description
    Video `format selection
    <https://github.com/ytdl-org/youtube-dl#format-selection>`__
    directly passed to youtube-dl.


extractor.ytdl.generic
----------------------
Type
    ``bool``
Default
    ``true``
Description
    Controls the use of youtube-dl's generic extractor.

    Set this option to ``"force"`` for the same effect as youtube-dl's
    ``--force-generic-extractor``.


extractor.ytdl.logging
----------------------
Type
    ``bool``
Default
    ``true``
Description
    Route youtube-dl's output through gallery-dl's logging system.
    Otherwise youtube-dl will write its output directly to stdout/stderr.

    Note: Set ``quiet`` and ``no_warnings`` in
    `extractor.ytdl.raw-options`_ to ``true`` to suppress all output.


extractor.ytdl.module
---------------------
Type
    ``string``
Default
    ``null``
Description
    Name of the youtube-dl Python module to import.

    Setting this to ``null`` will try to import ``"yt_dlp"``
    followed by ``"youtube_dl"`` as fallback.


extractor.ytdl.raw-options
--------------------------
Type
    ``object``
Example
    .. code:: json

        {
            "quiet": true,
            "writesubtitles": true,
            "merge_output_format": "mkv"
        }

Description
    Additional options passed directly to the ``YoutubeDL`` constructor.

    All available options can be found in `youtube-dl's docstrings
    <https://github.com/ytdl-org/youtube-dl/blob/master/youtube_dl/YoutubeDL.py#L138-L318>`__.


extractor.ytdl.cmdline-args
---------------------------
Type
    * ``string``
    * ``list`` of ``strings``
Example
    * ``"--quiet --write-sub --merge-output-format mkv"``
    * ``["--quiet", "--write-sub", "--merge-output-format", "mkv"]``
Description
    Additional options specified as youtube-dl command-line arguments.


extractor.ytdl.config-file
--------------------------
Type
    |Path|_
Example
    ``"~/.config/youtube-dl/config"``
Description
    Location of a youtube-dl configuration file to load options from.


extractor.[booru].tags
----------------------
Type
    ``bool``
Default
    ``false``
Description
    Categorize tags by their respective types
    and provide them as ``tags_<type>`` metadata fields.

    Note: This requires 1 additional HTTP request for each post.


extractor.[booru].notes
-----------------------
Type
    ``bool``
Default
    ``false``
Description
    Extract overlay notes (position and text).

    Note: This requires 1 additional HTTP request for each post.


extractor.[manga-extractor].chapter-reverse
-------------------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Reverse the order of chapter URLs extracted from manga pages.

    * ``true``: Start with the latest chapter
    * ``false``: Start with the first chapter


extractor.[manga-extractor].page-reverse
----------------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Download manga chapter pages in reverse order.


Downloader Options
==================


downloader.*.enabled
--------------------
Type
    ``bool``
Default
    ``true``
Description
    Enable/Disable this downloader module.


downloader.*.filesize-min & .filesize-max
-----------------------------------------
Type
    ``string``
Default
    ``null``
Example
    ``"32000"``, ``"500k"``, ``"2.5M"``
Description
    Minimum/Maximum allowed file size in bytes.
    Any file smaller/larger than this limit will not be downloaded.

    Possible values are valid integer or floating-point numbers
    optionally followed by one of ``k``, ``m``. ``g``, ``t`` or ``p``.
    These suffixes are case-insensitive.


downloader.*.mtime
------------------
Type
    ``bool``
Default
    ``true``
Description
    Use |Last-Modified|_ HTTP response headers
    to set file modification times.


downloader.*.part
-----------------
Type
    ``bool``
Default
    ``true``
Description
    Controls the use of ``.part`` files during file downloads.

    * ``true``: Write downloaded data into ``.part`` files and rename
      them upon download completion. This mode additionally supports
      resuming incomplete downloads.
    * ``false``: Do not use ``.part`` files and write data directly
      into the actual output files.


downloader.*.part-directory
---------------------------
Type
    |Path|_
Default
    ``null``
Description
    Alternate location for ``.part`` files.

    Missing directories will be created as needed.
    If this value is ``null``, ``.part`` files are going to be stored
    alongside the actual output files.


downloader.*.progress
---------------------
Type
    ``float``
Default
    ``3.0``
Description
    Number of seconds until a download progress indicator
    for the current download is displayed.

    Set this option to ``null`` to disable this indicator.


downloader.*.rate
-----------------
Type
    ``string``
Default
    ``null``
Example
    ``"32000"``, ``"500k"``, ``"2.5M"``
Description
    Maximum download rate in bytes per second.

    Possible values are valid integer or floating-point numbers
    optionally followed by one of ``k``, ``m``. ``g``, ``t`` or ``p``.
    These suffixes are case-insensitive.


downloader.*.retries
--------------------
Type
    ``integer``
Default
    `extractor.*.retries`_
Description
    Maximum number of retries during file downloads,
    or ``-1`` for infinite retries.


downloader.*.timeout
--------------------
Type
    ``float`` or ``null``
Default
    `extractor.*.timeout`_
Description
    Connection timeout during file downloads.


downloader.*.verify
-------------------
Type
    ``bool`` or ``string``
Default
    `extractor.*.verify`_
Description
    Certificate validation during file downloads.


downloader.http.adjust-extensions
---------------------------------
Type
    ``bool``
Default
    ``true``
Description
    Check the file headers of ``jpg``, ``png``, and ``gif`` files
    and adjust their filename extensions if they do not match.


downloader.http.headers
-----------------------
Type
    ``object``
Example
    ``{"Accept": "image/webp,*/*", "Referer": "https://example.org/"}``
Description
    Additional HTTP headers to send when downloading files,


downloader.ytdl.format
----------------------
Type
    ``string``
Default
    youtube-dl's default, currently ``"bestvideo+bestaudio/best"``
Description
    Video `format selection
    <https://github.com/ytdl-org/youtube-dl#format-selection>`__
    directly passed to youtube-dl.


downloader.ytdl.forward-cookies
-------------------------------
Type
    ``bool``
Default
    ``false``
Description
    Forward cookies to youtube-dl.


downloader.ytdl.logging
-----------------------
Type
    ``bool``
Default
    ``true``
Description
    Route youtube-dl's output through gallery-dl's logging system.
    Otherwise youtube-dl will write its output directly to stdout/stderr.

    Note: Set ``quiet`` and ``no_warnings`` in
    `downloader.ytdl.raw-options`_ to ``true`` to suppress all output.


downloader.ytdl.module
----------------------
Type
    ``string``
Default
    ``null``
Description
    Name of the youtube-dl Python module to import.

    Setting this to ``null`` will first try to import ``"yt_dlp"``
    and use ``"youtube_dl"`` as fallback.


downloader.ytdl.outtmpl
-----------------------
Type
    ``string``
Default
    ``null``
Description
    The `Output Template <https://github.com/ytdl-org/youtube-dl#output-template>`__
    used to generate filenames for files downloaded with youtube-dl.

    Special values:

    * ``null``: generate filenames with `extractor.*.filename`_
    * ``"default"``: use youtube-dl's default, currently ``"%(title)s-%(id)s.%(ext)s"``

    Note: An output template other than ``null`` might
    cause unexpected results in combination with other options
    (e.g. ``"skip": "enumerate"``)


downloader.ytdl.raw-options
---------------------------
Type
    ``object``
Example
    .. code:: json

        {
            "quiet": true,
            "writesubtitles": true,
            "merge_output_format": "mkv"
        }

Description
    Additional options passed directly to the ``YoutubeDL`` constructor.

    All available options can be found in `youtube-dl's docstrings
    <https://github.com/ytdl-org/youtube-dl/blob/master/youtube_dl/YoutubeDL.py#L138-L318>`__.


downloader.ytdl.cmdline-args
----------------------------
Type
    * ``string``
    * ``list`` of ``strings``
Example
    * ``"--quiet --write-sub --merge-output-format mkv"``
    * ``["--quiet", "--write-sub", "--merge-output-format", "mkv"]``
Description
    Additional options specified as youtube-dl command-line arguments.


downloader.ytdl.config-file
---------------------------
Type
    |Path|_
Example
    ``"~/.config/youtube-dl/config"``
Description
    Location of a youtube-dl configuration file to load options from.



Output Options
==============


output.fallback
---------------
Type
    ``bool``
Default
    ``true``
Description
    Include fallback URLs in the output of ``-g/--get-urls``.


output.mode
-----------
Type
    ``string``
Default
    ``"auto"``
Description
    Controls the output string format and status indicators.

    * ``"null"``: No output
    * ``"pipe"``: Suitable for piping to other processes or files
    * ``"terminal"``: Suitable for the standard Windows console
    * ``"color"``: Suitable for terminals that understand ANSI escape codes and colors
    * ``"auto"``: Automatically choose the best suitable output mode


output.shorten
--------------
Type
    ``bool``
Default
    ``true``
Description
    Controls whether the output strings should be shortened to fit
    on one console line.

    Set this option to ``"eaw"`` to also work with east-asian characters
    with a display width greater than 1.


output.skip
-----------
Type
    ``bool``
Default
    ``true``
Description
    Show skipped file downloads.


output.progress
---------------
Type
    ``bool`` or ``string``
Default
    ``true``
Description
    Controls the progress indicator when *gallery-dl* is run with
    multiple URLs as arguments.

    * ``true``: Show the default progress indicator
      (``"[{current}/{total}] {url}"``)
    * ``false``: Do not show any progress indicator
    * Any ``string``: Show the progress indicator using this
      as a custom `format string`_. Possible replacement keys are
      ``current``, ``total``  and ``url``.


output.log
----------
Type
    ``string`` or |Logging Configuration|_
Default
    ``"[{name}][{levelname}] {message}"``
Description
    Configuration for standard logging output to stderr.

    If this is a simple ``string``, it specifies
    the format string for logging messages.


output.logfile
--------------
Type
    |Path|_ or |Logging Configuration|_
Default
    ``null``
Description
    File to write logging output to.


output.unsupportedfile
----------------------
Type
    |Path|_ or |Logging Configuration|_
Default
    ``null``
Description
    File to write external URLs unsupported by *gallery-dl* to.

    The default format string here is ``"{message}"``.


output.num-to-str
-----------------
Type
    ``bool``
Default
    ``false``
Description
    Convert numeric values (``integer`` or ``float``) to ``string``
    before outputting them as JSON.



Postprocessor Options
=====================

This section lists all options available inside
`Postprocessor Configuration`_ objects.

Each option is titled as ``<name>.<option>``, meaning a post processor
of type ``<name>`` will look for an ``<option>`` field inside its "body".
For example an ``exec`` post processor will recognize
an `async <exec.async_>`__,  `command <exec.command_>`__,
and `event <exec.event_>`__ field:

.. code:: json

    {
        "name"   : "exec",
        "async"  : false,
        "command": "...",
        "event"  : "after"
    }


classify.mapping
----------------
Type
    ``object``
Default
    .. code:: json

        {
            "Pictures": ["jpg", "jpeg", "png", "gif", "bmp", "svg", "webp"],
            "Video"   : ["flv", "ogv", "avi", "mp4", "mpg", "mpeg", "3gp", "mkv", "webm", "vob", "wmv"],
            "Music"   : ["mp3", "aac", "flac", "ogg", "wma", "m4a", "wav"],
            "Archives": ["zip", "rar", "7z", "tar", "gz", "bz2"]
        }

Description
    A mapping from directory names to filename extensions that should
    be stored in them.

    Files with an extension not listed will be ignored and stored
    in their default location.


compare.action
--------------
Type
    ``string``
Default
    ``"replace"``
Description
    The action to take when files do **not** compare as equal.

    * ``"replace"``: Replace/Overwrite the old version with the new one

    * ``"enumerate"``: Add an enumeration index to the filename of the new
      version like `skip = "enumerate" <extractor.*.skip_>`__


compare.equal
-------------
Type
    ``string``
Default
    ``"null"``
Description
    The action to take when files do compare as equal.

    * ``"abort:N"``: Stop the current extractor run
      after ``N`` consecutive files compared as equal.

    * ``"terminate:N"``: Stop the current extractor run,
      including parent extractors,
      after ``N`` consecutive files compared as equal.

    * ``"exit:N"``: Exit the program
      after ``N`` consecutive files compared as equal.


compare.shallow
---------------
Type
    ``bool``
Default
    ``false``
Description
    Only compare file sizes. Do not read and compare their content.


exec.async
----------
Type
    ``bool``
Default
    ``false``
Description
    Controls whether to wait for a subprocess to finish
    or to let it run asynchronously.


exec.command
------------
Type
    ``string`` or ``list`` of ``strings``
Example
    * ``"convert {} {}.png && rm {}"``
    * ``["echo", "{user[account]}", "{id}"]``
Description
    The command to run.

    * If this is a ``string``, it will be executed using the system's
      shell, e.g. ``/bin/sh``. Any ``{}`` will be replaced
      with the full path of a file or target directory, depending on
      `exec.event`_

    * If this is a ``list``, the first element specifies the program
      name and any further elements its arguments.
      Each element of this list is treated as a `format string`_ using
      the files' metadata as well as ``{_path}``, ``{_directory}``,
      and ``{_filename}``.


exec.event
----------
Type
    ``string``
Default
    ``"after"``
Description
    The event for which `exec.command`_ is run.

    See `metadata.event`_ for a list of available events.


metadata.mode
-------------
Type
    ``string``
Default
    ``"json"``
Description
    Select how to write metadata.

    * ``"json"``: all metadata using `json.dump()
      <https://docs.python.org/3/library/json.html#json.dump>`_
    * ``"tags"``: ``tags`` separated by newlines
    * ``"custom"``: result of applying `metadata.content-format`_
      to a file's metadata dictionary


metadata.filename
-----------------
Type
    ``string``
Default
    ``null``
Example
    ``"{id}.data.json"``
Description
    A `format string`_ to build the filenames for metadata files with.
    (see `extractor.filename <extractor.*.filename_>`__)

    If this option is set, `metadata.extension`_ and
    `metadata.extension-format`_ will be ignored.


metadata.directory
------------------
Type
    ``string``
Default
    ``"."``
Example
    ``"metadata"``
Description
    Directory where metadata files are stored in relative to the
    current target location for file downloads.


metadata.extension
------------------
Type
    ``string``
Default
    ``"json"`` or ``"txt"``
Description
    Filename extension for metadata files that will be appended to the
    original file names.


metadata.extension-format
-------------------------
Type
    ``string``
Example
    * ``"{extension}.json"``
    * ``"json"``
Description
    Custom format string to build filename extensions for metadata
    files with, which will replace the original filename extensions.

    Note: `metadata.extension`_ is ignored if this option is set.


metadata.event
--------------
Type
    ``string``
Default
    ``"file"``
Description
    The event for which metadata gets written to a file.

    The available events are:

    ``init``
        After post processor initialization
        and before the first file download
    ``finalize``
        On extractor shutdown, e.g. after all files were downloaded
    ``prepare``
        Before a file download
    ``file``
        When completing a file download,
        but before it gets moved to its target location
    ``after``
        After a file got moved to its target location
    ``skip``
        When skipping a file download
    ``post``
        When starting to download all files of a `post`,
        e.g. a Tweet on Twitter or a post on Patreon.


metadata.content-format
-----------------------
Type
    ``string`` or ``list`` of ``strings``
Example
    * ``"tags:\n\n{tags:J\n}\n"``
    * ``["tags:", "", "{tags:J\n}"]``
Description
    Custom format string to build the content of metadata files with.

    Note: Only applies for ``"mode": "custom"``.


mtime.key
---------
Type
    ``string``
Default
    ``"date"``
Description
    Name of the metadata field whose value should be used.

    This value must either be a UNIX timestamp or a
    |datetime|_ object.


ugoira.extension
----------------
Type
    ``string``
Default
    ``"webm"``
Description
    Filename extension for the resulting video files.


ugoira.ffmpeg-args
------------------
Type
    ``list`` of ``strings``
Default
    ``null``
Example
    ``["-c:v", "libvpx-vp9", "-an", "-b:v", "2M"]``
Description
    Additional FFmpeg command-line arguments.


ugoira.ffmpeg-demuxer
---------------------
Type
    ``string``
Default
    ``image2``
Description
    FFmpeg demuxer to read input files with. Possible values are
    "`image2 <https://ffmpeg.org/ffmpeg-formats.html#image2-1>`_" and
    "`concat <https://ffmpeg.org/ffmpeg-formats.html#concat-1>`_".


ugoira.ffmpeg-location
----------------------
Type
    |Path|_
Default
    ``"ffmpeg"``
Description
    Location of the ``ffmpeg`` (or ``avconv``) executable to use.


ugoira.ffmpeg-output
--------------------
Type
    ``bool``
Default
    ``true``
Description
    Show FFmpeg output.


ugoira.ffmpeg-twopass
---------------------
Type
    ``bool``
Default
    ``false``
Description
    Enable Two-Pass encoding.


ugoira.framerate
----------------
Type
    ``string``
Default
    ``"auto"``
Description
    Controls the frame rate argument (``-r``) for FFmpeg

    * ``"auto"``: Automatically assign a fitting frame rate
      based on delays between frames.
    * any other ``string``:  Use this value as argument for ``-r``.
    * ``null`` or an empty ``string``: Don't set an explicit frame rate.


ugoira.keep-files
-----------------
Type
    ``bool``
Default
    ``false``
Description
    Keep ZIP archives after conversion.


ugoira.libx264-prevent-odd
--------------------------
Type
    ``bool``
Default
    ``true``
Description
    Prevent ``"width/height not divisible by 2"`` errors
    when using ``libx264`` or ``libx265`` encoders
    by applying a simple cropping filter. See this `Stack Overflow
    thread <https://stackoverflow.com/questions/20847674>`__
    for more information.

    This option, when ``libx264/5`` is used, automatically
    adds ``["-vf", "crop=iw-mod(iw\\,2):ih-mod(ih\\,2)"]``
    to the list of FFmpeg command-line arguments
    to reduce an odd width/height by 1 pixel and make them even.


ugoira.repeat-last-frame
------------------------
Type
    ``bool``
Default
    ``true``
Description
    Allow repeating the last frame when necessary
    to prevent it from only being displayed for a very short amount of time.


zip.compression
---------------
Type
    ``string``
Default
    ``"store"``
Description
    Compression method to use when writing the archive.

    Possible values are ``"store"``, ``"zip"``, ``"bzip2"``, ``"lzma"``.

zip.extension
-------------
Type
    ``string``
Default
    ``"zip"``
Description
    Filename extension for the created ZIP archive.


zip.keep-files
--------------
Type
    ``bool``
Default
    ``false``
Description
    Keep the actual files after writing them to a ZIP archive.


zip.mode
--------
Type
    ``string``
Default
    ``"default"``
Description
    * ``"default"``: Write the central directory file header
      once after everything is done or an exception is raised.

    * ``"safe"``: Update the central directory file header
      each time a file is stored in a ZIP archive.

      This greatly reduces the chance a ZIP archive gets corrupted in
      case the Python interpreter gets shut down unexpectedly
      (power outage, SIGKILL) but is also a lot slower.



Miscellaneous Options
=====================


extractor.modules
-----------------
Type
    ``list`` of ``strings``
Default
    The ``modules`` list in
    `extractor/__init__.py <../gallery_dl/extractor/__init__.py#L12>`__
Example
    ``["reddit", "danbooru", "mangadex"]``
Description
    The list of modules to load when searching for a suitable
    extractor class. Useful to reduce startup time and memory usage.


cache.file
----------
Type
    |Path|_
Default
    * (``%APPDATA%`` or ``"~"``) + ``"/gallery-dl/cache.sqlite3"`` on Windows
    * (``$XDG_CACHE_HOME`` or ``"~/.cache"``) + ``"/gallery-dl/cache.sqlite3"`` on all other platforms
Description
    Path of the SQLite3 database used to cache login sessions,
    cookies and API tokens across `gallery-dl` invocations.

    Set this option to ``null`` or an invalid path to disable
    this cache.


pyopenssl
---------
Type
    ``bool``
Default
    ``false``
Description
    Use `pyOpenSSL <https://www.pyopenssl.org/en/stable/>`__-backed
    SSL-support.



API Tokens & IDs
================

All configuration keys listed in this section have fully functional default
values embedded into *gallery-dl* itself, but if things unexpectedly break
or you want to use your own personal client credentials, you can follow these
instructions to get an alternative set of API tokens and IDs.


extractor.deviantart.client-id & .client-secret
-----------------------------------------------
Type
    ``string``
How To
    * login and visit DeviantArt's
      `Applications & Keys <https://www.deviantart.com/developers/apps>`__
      section
    * click "Register Application"
    * scroll to "OAuth2 Redirect URI Whitelist (Required)"
      and enter "https://mikf.github.io/gallery-dl/oauth-redirect.html"
    * scroll to the bottom and agree to the API License Agreement.
      Submission Policy, and Terms of Service.
    * click "Save"
    * copy ``client_id`` and ``client_secret`` of your new
      application and put them in your configuration file
      as ``"client-id"`` and ``"client-secret"``
    * clear your `cache <cache.file_>`__ to delete any remaining
      ``access-token`` entries. (``gallery-dl --clear-cache deviantart``)
    * get a new `refresh-token <extractor.deviantart.refresh-token_>`__ for the
      new ``client-id`` (``gallery-dl oauth:deviantart``)


extractor.flickr.api-key & .api-secret
--------------------------------------
Type
    ``string``
How To
    * login and `Create an App <https://www.flickr.com/services/apps/create/apply/>`__
      in Flickr's `App Garden <https://www.flickr.com/services/>`__
    * click "APPLY FOR A NON-COMMERCIAL KEY"
    * fill out the form with a random name and description
      and click "SUBMIT"
    * copy ``Key`` and ``Secret`` and put them in your configuration
      file


extractor.reddit.client-id & .user-agent
----------------------------------------
Type
    ``string``
How To
    * login and visit the `apps <https://www.reddit.com/prefs/apps/>`__
      section of your account's preferences
    * click the "are you a developer? create an app..." button
    * fill out the form, choose "installed app", preferably set
      "http://localhost:6414/" as "redirect uri" and finally click
      "create app"
    * copy the client id (third line, under your application's name and
      "installed app") and put it in your configuration file
    * use "``Python:<application name>:v1.0 (by /u/<username>)``" as
      user-agent and replace ``<application name>`` and ``<username>``
      accordingly (see Reddit's
      `API access rules <https://github.com/reddit/reddit/wiki/API>`__)


extractor.smugmug.api-key & .api-secret
---------------------------------------
Type
    ``string``
How To
    * login and `Apply for an API Key <https://api.smugmug.com/api/developer/apply>`__
    * use a random name and description,
      set "Type" to "Application", "Platform" to "All",
      and "Use" to "Non-Commercial"
    * fill out the two checkboxes at the bottom and click "Apply"
    * copy ``API Key`` and ``API Secret``
      and put them in your configuration file


extractor.tumblr.api-key & .api-secret
--------------------------------------
Type
    ``string``
How To
    * login and visit Tumblr's
      `Applications <https://www.tumblr.com/oauth/apps>`__ section
    * click "Register application"
    * fill out the form: use a random name and description, set
      https://example.org/ as "Application Website" and "Default
      callback URL"
    * solve Google's "I'm not a robot" challenge and click "Register"
    * click "Show secret key" (below "OAuth Consumer Key")
    * copy your ``OAuth Consumer Key`` and ``Secret Key``
      and put them in your configuration file



Custom Types
============


Date
----
Type
    * ``string``
    * ``integer``
Example
    * ``"2019-01-01T00:00:00"``
    * ``"2019"`` with ``"%Y"`` as `date-format`_
    * ``1546297200``
Description
    A |Date|_ value represents a specific point in time.

    * If given as ``string``, it is parsed according to `date-format`_.
    * If given as ``integer``, it is interpreted as UTC timestamp.


Duration
--------
Type
    * ``float``
    * ``list`` with 2 ``floats``
    * ``string``
Example
    * ``2.85``
    * ``[1.5, 3.0]``
    * ``"2.85"``, ``"1.5-3.0"``
Description
    A |Duration|_ represents a span of time in seconds.

    * If given as a single ``float``, it will be used as that exact value.
    * If given as a ``list`` with 2 floating-point numbers ``a`` & ``b`` ,
      it will be randomly chosen with uniform distribution such that ``a <= N <=b``.
      (see `random.uniform() <https://docs.python.org/3/library/random.html#random.uniform>`_)
    * If given as a ``string``, it can either represent a single ``float``
      value (``"2.85"``) or a range  (``"1.5-3.0"``).


Path
----
Type
    * ``string``
    * ``list`` of ``strings``
Example
    * ``"file.ext"``
    * ``"~/path/to/file.ext"``
    * ``"$HOME/path/to/file.ext"``
    * ``["$HOME", "path", "to", "file.ext"]``
Description
    A |Path|_ is a ``string`` representing the location of a file
    or directory.

    Simple `tilde expansion <https://docs.python.org/3/library/os.path.html#os.path.expanduser>`__
    and `environment variable expansion <https://docs.python.org/3/library/os.path.html#os.path.expandvars>`__
    is supported.

    In Windows environments, backslashes (``"\"``) can, in addition to
    forward slashes (``"/"``), be used as path separators.
    Because backslashes are JSON's escape character,
    they themselves have to be escaped.
    The path ``C:\path\to\file.ext`` has therefore to be written as
    ``"C:\\path\\to\\file.ext"`` if you want to use backslashes.


Logging Configuration
---------------------
Type
    ``object``
Example
    .. code:: json

        {
            "format"     : "{asctime} {name}: {message}",
            "format-date": "%H:%M:%S",
            "path"       : "~/log.txt",
            "encoding"   : "ascii"
        }

    .. code:: json

        {
            "level" : "debug",
            "format": {
                "debug"  : "debug: {message}",
                "info"   : "[{name}] {message}",
                "warning": "Warning: {message}",
                "error"  : "ERROR: {message}"
            }
        }

Description
    Extended logging output configuration.

    * format
        * General format string for logging messages
          or a dictionary with format strings for each loglevel.

          In addition to the default
          `LogRecord attributes <https://docs.python.org/3/library/logging.html#logrecord-attributes>`__,
          it is also possible to access the current
          `extractor <https://github.com/mikf/gallery-dl/blob/33fe67b594dbf8fb742464c95e0f6952bb60eb8a/gallery_dl/extractor/common.py#L23>`__,
          `job <https://github.com/mikf/gallery-dl/blob/33fe67b594dbf8fb742464c95e0f6952bb60eb8a/gallery_dl/job.py#L18>`__,
          `path <https://github.com/mikf/gallery-dl/blob/33fe67b594dbf8fb742464c95e0f6952bb60eb8a/gallery_dl/util.py#L702>`__,
          and `keywords` objects and their attributes, for example
          ``"{extractor.url}"``, ``"{path.filename}"``, ``"{keywords.title}"``
        * Default: ``"[{name}][{levelname}] {message}"``
    * format-date
        * Format string for ``{asctime}`` fields in logging messages
          (see `strftime() directives <https://docs.python.org/3/library/time.html#time.strftime>`__)
        * Default: ``"%Y-%m-%d %H:%M:%S"``
    * level
        * Minimum logging message level
          (one of ``"debug"``, ``"info"``, ``"warning"``, ``"error"``, ``"exception"``)
        * Default: ``"info"``
    * path
        * |Path|_ to the output file
    * mode
        * Mode in which the file is opened;
          use ``"w"`` to truncate or ``"a"`` to append
          (see `open() <https://docs.python.org/3/library/functions.html#open>`__)
        * Default: ``"w"``
    * encoding
        * File encoding
        * Default: ``"utf-8"``

    Note: path, mode, and encoding are only applied when configuring
    logging output to a file.


Postprocessor Configuration
---------------------------
Type
    ``object``
Example
    .. code:: json

        { "name": "mtime" }

    .. code:: json

        {
            "name"       : "zip",
            "compression": "store",
            "extension"  : "cbz",
            "filter"     : "extension not in ('zip', 'rar')",
            "whitelist"  : ["mangadex", "exhentai", "nhentai"]
        }
Description
    An ``object`` containing a ``"name"`` attribute specifying the
    post-processor type, as well as any of its `options <Postprocessor Options_>`__.

    It is possible to set a ``"filter"`` expression similar to
    `image-filter <extractor.*.image-filter_>`_ to only run a post-processor
    conditionally.

    It is also possible set a ``"whitelist"`` or ``"blacklist"`` to
    only enable or disable a post-processor for the specified
    extractor categories.

    The available post-processor types are

    ``classify``
        Categorize files by filename extension
    ``compare``
        | Compare versions of the same file and replace/enumerate them on mismatch
        | (requires `downloader.*.part`_ = ``true`` and `extractor.*.skip`_ = ``false``)
    ``exec``
        Execute external commands
    ``metadata``
        Write metadata to separate files
    ``mtime``
        Set file modification time according to its metadata
    ``ugoira``
        Convert Pixiv Ugoira to WebM using `FFmpeg <https://www.ffmpeg.org/>`__
    ``zip``
        Store files in a ZIP archive



.. |.netrc| replace:: ``.netrc``
.. |requests.request()| replace:: ``requests.request()``
.. |timeout| replace:: ``timeout``
.. |verify| replace:: ``verify``
.. |mature_content| replace:: ``mature_content``
.. |webbrowser.open()| replace:: ``webbrowser.open()``
.. |datetime| replace:: ``datetime``
.. |datetime.max| replace:: ``datetime.max``
.. |Date| replace:: ``Date``
.. |Duration| replace:: ``Duration``
.. |Path| replace:: ``Path``
.. |Last-Modified| replace:: ``Last-Modified``
.. |Logging Configuration| replace:: ``Logging Configuration``
.. |Postprocessor Configuration| replace:: ``Postprocessor Configuration``
.. |strptime| replace:: strftime() and strptime() Behavior
.. |postprocessors| replace:: ``postprocessors``

.. _base-directory: `extractor.*.base-directory`_
.. _date-format: `extractor.*.date-format`_
.. _deviantart.metadata: `extractor.deviantart.metadata`_
.. _postprocessors: `extractor.*.postprocessors`_
.. _download archive: `extractor.*.archive`_

.. _.netrc:             https://stackoverflow.com/tags/.netrc/info
.. _Last-Modified:      https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.29
.. _datetime:           https://docs.python.org/3/library/datetime.html#datetime-objects
.. _datetime.max:       https://docs.python.org/3/library/datetime.html#datetime.datetime.max
.. _strptime:           https://docs.python.org/3/library/datetime.html#strftime-strptime-behavior
.. _webbrowser.open():  https://docs.python.org/3/library/webbrowser.html
.. _mature_content:     https://www.deviantart.com/developers/http/v1/20160316/object/deviation
.. _Authentication:     https://github.com/mikf/gallery-dl#authentication
.. _OAuth:              https://github.com/mikf/gallery-dl#oauth
.. _format string:      https://github.com/mikf/gallery-dl/blob/master/docs/formatting.md
.. _format strings:     https://github.com/mikf/gallery-dl/blob/master/docs/formatting.md
.. _youtube-dl:         https://github.com/ytdl-org/youtube-dl
.. _requests.request(): https://requests.readthedocs.io/en/master/api/#requests.request
.. _timeout:            https://requests.readthedocs.io/en/master/user/advanced/#timeouts
.. _verify:             https://requests.readthedocs.io/en/master/user/advanced/#ssl-cert-verification
.. _`Requests' proxy documentation`: https://requests.readthedocs.io/en/master/user/advanced/#proxies