Merge branch 'develop' into feature/gen-magic

17 files changed, 484 insertions, 78 deletions

diff --git a/docs/API/admin_api.md b/docs/API/admin_api.md
index c0ea074f0..7bf13daef 100644
--- a/docs/API/admin_api.md
+++ b/docs/API/admin_api.md
@@ -349,9 +349,9 @@ Response:
 
 ### Unfollow a Relay
 
-Params:
-
-* `relay_url`
+- Params:
+  - `relay_url`
+  - *optional* `force`: forcefully unfollow a relay even when the relay is not available. (default is `false`)
 
 Response:
 
@@ -1334,3 +1334,166 @@ Loads json generated from `config/descriptions.exs`.
 { }
 
 ```
+
+## GET /api/pleroma/admin/users/:nickname/chats
+
+### List a user's chats
+
+- Params: None
+
+- Response:
+
+```json
+[
+   {
+      "sender": {
+        "id": "someflakeid",
+        "username": "somenick",
+        ...
+      },
+      "receiver": {
+        "id": "someflakeid",
+        "username": "somenick",
+        ...
+      },
+      "id" : "1",
+      "unread" : 2,
+      "last_message" : {...}, // The last message in that chat
+      "updated_at": "2020-04-21T15:11:46.000Z"
+   }
+]
+```
+
+## GET /api/pleroma/admin/chats/:chat_id
+
+### View a single chat
+
+- Params: None
+
+- Response:
+
+```json
+{
+  "sender": {
+    "id": "someflakeid",
+    "username": "somenick",
+    ...
+  },
+  "receiver": {
+    "id": "someflakeid",
+    "username": "somenick",
+    ...
+  },
+  "id" : "1",
+  "unread" : 2,
+  "last_message" : {...}, // The last message in that chat
+  "updated_at": "2020-04-21T15:11:46.000Z"
+}
+```
+
+## GET /api/pleroma/admin/chats/:chat_id/messages
+
+### List the messages in a chat
+
+- Params: `max_id`, `min_id`
+
+- Response:
+
+```json
+[
+  {
+    "account_id": "someflakeid",
+    "chat_id": "1",
+    "content": "Check this out :firefox:",
+    "created_at": "2020-04-21T15:11:46.000Z",
+    "emojis": [
+      {
+        "shortcode": "firefox",
+        "static_url": "https://dontbulling.me/emoji/Firefox.gif",
+        "url": "https://dontbulling.me/emoji/Firefox.gif",
+        "visible_in_picker": false
+      }
+    ],
+    "id": "13",
+    "unread": true
+  },
+  {
+    "account_id": "someflakeid",
+    "chat_id": "1",
+    "content": "Whats' up?",
+    "created_at": "2020-04-21T15:06:45.000Z",
+    "emojis": [],
+    "id": "12",
+    "unread": false
+  }
+]
+```
+
+## DELETE /api/pleroma/admin/chats/:chat_id/messages/:message_id
+
+### Delete a single message
+
+- Params: None
+
+- Response:
+
+```json
+{
+  "account_id": "someflakeid",
+  "chat_id": "1",
+  "content": "Check this out :firefox:",
+  "created_at": "2020-04-21T15:11:46.000Z",
+  "emojis": [
+    {
+      "shortcode": "firefox",
+      "static_url": "https://dontbulling.me/emoji/Firefox.gif",
+      "url": "https://dontbulling.me/emoji/Firefox.gif",
+      "visible_in_picker": false
+    }
+  ],
+  "id": "13",
+  "unread": false
+}
+```
+
+## `GET /api/pleroma/admin/instance_document/:document_name`
+
+### Get an instance document
+
+- Authentication: required
+
+- Response:
+
+Returns the content of the document
+
+```html
+<h1>Instance panel</h1>
+```
+
+## `PATCH /api/pleroma/admin/instance_document/:document_name`
+- Params:
+  - `file` (the file to be uploaded, using multipart form data.)
+
+### Update an instance document
+
+- Authentication: required
+
+- Response:
+
+``` json
+{
+  "url": "https://example.com/instance/panel.html"
+}
+```
+
+## `DELETE /api/pleroma/admin/instance_document/:document_name`
+
+### Delete an instance document
+
+- Response:
+
+``` json
+{
+  "url": "https://example.com/instance/panel.html"
+}
+```
diff --git a/docs/API/pleroma_api.md b/docs/API/pleroma_api.md
index 4e97d26c0..3fd141bd2 100644
--- a/docs/API/pleroma_api.md
+++ b/docs/API/pleroma_api.md
@@ -44,6 +44,22 @@ Request parameters can be passed via [query strings](https://en.wikipedia.org/wi
 * Response: HTTP 200 on success, 500 on error
 * Note: Users that can't be followed are silently skipped.
 
+## `/api/pleroma/blocks_import`
+### Imports your blocks.
+* Method: `POST`
+* Authentication: required
+* Params:
+    * `list`: STRING or FILE containing a whitespace-separated list of accounts to block
+* Response: HTTP 200 on success, 500 on error
+
+## `/api/pleroma/mutes_import`
+### Imports your mutes.
+* Method: `POST`
+* Authentication: required
+* Params:
+    * `list`: STRING or FILE containing a whitespace-separated list of accounts to mute
+* Response: HTTP 200 on success, 500 on error
+
 ## `/api/pleroma/captcha`
 ### Get a new captcha
 * Method: `GET`
@@ -362,44 +378,43 @@ The status posting endpoint takes an additional parameter, `in_reply_to_conversa
 * Params: None
 * Response: JSON, returns a list of Mastodon Conversation entities that were marked as read (200 - healthy, 503 unhealthy).
 
-## `GET /api/pleroma/emoji/packs/import`
-### Imports packs from filesystem
-* Method `GET`
-* Authentication: required
-* Params: None
-* Response: JSON, returns a list of imported packs.
+## `GET /api/pleroma/emoji/pack?name=:name`
+
+### Get pack.json for the pack
 
-## `GET /api/pleroma/emoji/packs/remote`
-### Make request to another instance for packs list
 * Method `GET`
-* Authentication: required
+* Authentication: not required
 * Params:
-  * `url`: url of the instance to get packs from
-* Response: JSON with the pack list, hashmap with pack name and pack contents
+  * `page`: page number for files (default 1)
+  * `page_size`: page size for files (default 30)
+* Response: JSON, pack json with `files`, `files_count` and `pack` keys with 200 status or 404 if the pack does not exist.
 
-## `POST /api/pleroma/emoji/packs/download`
-### Download pack from another instance
-* Method `POST`
-* Authentication: required
-* Params:
-  * `url`: url of the instance to download from
-  * `name`: pack to download from that instance
-  * `as`: (*optional*) name how to save pack
-* Response: JSON, "ok" with 200 status if the pack was downloaded, or 500 if there were
-  errors downloading the pack
+```json
+{
+  "files": {...},
+  "files_count": 0, // emoji count in pack
+  "pack": {...}
+}
+```
+
+## `POST /api/pleroma/emoji/pack?name=:name`
 
-## `POST /api/pleroma/emoji/packs/:name`
 ### Creates an empty pack
+
 * Method `POST`
-* Authentication: required
-* Params: None
+* Authentication: required (admin)
+* Params:
+  * `name`: pack name
 * Response: JSON, "ok" and 200 status or 409 if the pack with that name already exists
 
-## `PATCH /api/pleroma/emoji/packs/:name`
+## `PATCH /api/pleroma/emoji/pack?name=:name`
+
 ### Updates (replaces) pack metadata
+
 * Method `PATCH`
-* Authentication: required
+* Authentication: required (admin)
 * Params:
+  * `name`: pack name
   * `metadata`: metadata to replace the old one
     * `license`: Pack license
     * `homepage`: Pack home page url
@@ -410,39 +425,85 @@ The status posting endpoint takes an additional parameter, `in_reply_to_conversa
 * Response: JSON, updated "metadata" section of the pack and 200 status or 400 if there was a
   problem with the new metadata (the error is specified in the "error" part of the response JSON)
 
-## `DELETE /api/pleroma/emoji/packs/:name`
+## `DELETE /api/pleroma/emoji/pack?name=:name`
+
 ### Delete a custom emoji pack
+
 * Method `DELETE`
-* Authentication: required
-* Params: None
+* Authentication: required (admin)
+* Params:
+  * `name`: pack name
 * Response: JSON, "ok" and 200 status or 500 if there was an error deleting the pack
 
-## `POST /api/pleroma/emoji/packs/:name/files`
+## `GET /api/pleroma/emoji/packs/import`
+
+### Imports packs from filesystem
+
+* Method `GET`
+* Authentication: required (admin)
+* Params: None
+* Response: JSON, returns a list of imported packs.
+
+## `GET /api/pleroma/emoji/packs/remote`
+
+### Make request to another instance for packs list
+
+* Method `GET`
+* Authentication: required (admin)
+* Params:
+  * `url`: url of the instance to get packs from
+  * `page`: page number for packs (default 1)
+  * `page_size`: page size for packs (default 50)
+* Response: JSON with the pack list, hashmap with pack name and pack contents
+
+## `POST /api/pleroma/emoji/packs/download`
+
+### Download pack from another instance
+
+* Method `POST`
+* Authentication: required (admin)
+* Params:
+  * `url`: url of the instance to download from
+  * `name`: pack to download from that instance
+  * `as`: (*optional*) name how to save pack
+* Response: JSON, "ok" with 200 status if the pack was downloaded, or 500 if there were
+  errors downloading the pack
+
+## `POST /api/pleroma/emoji/packs/files?name=:name`
+
 ### Add new file to the pack
+
 * Method `POST`
-* Authentication: required
+* Authentication: required (admin)
 * Params:
+  * `name`: pack name
   * `file`: file needs to be uploaded with the multipart request or link to remote file.
   * `shortcode`: (*optional*) shortcode for new emoji, must be unique for all emoji. If not sended, shortcode will be taken from original filename.
   * `filename`: (*optional*) new emoji file name. If not specified will be taken from original filename.
 * Response: JSON, list of files for updated pack (hashmap -> shortcode => filename) with status 200, either error status with error message.
 
-## `PATCH /api/pleroma/emoji/packs/:name/files`
+## `PATCH /api/pleroma/emoji/packs/files?name=:name`
+
 ### Update emoji file from pack
+
 * Method `PATCH`
-* Authentication: required
+* Authentication: required (admin)
 * Params:
+  * `name`: pack name
   * `shortcode`: emoji file shortcode
   * `new_shortcode`: new emoji file shortcode
   * `new_filename`: new filename for emoji file
   * `force`: (*optional*) with true value to overwrite existing emoji with new shortcode
 * Response: JSON, list with updated files for updated pack (hashmap -> shortcode => filename) with status 200, either error status with error message.
 
-## `DELETE /api/pleroma/emoji/packs/:name/files`
+## `DELETE /api/pleroma/emoji/packs/files?name=:name`
+
 ### Delete emoji file from pack
+
 * Method `DELETE`
-* Authentication: required
+* Authentication: required (admin)
 * Params:
+  * `name`: pack name
   * `shortcode`: emoji file shortcode
 * Response: JSON, list with updated files for updated pack (hashmap -> shortcode => filename) with status 200, either error status with error message.
 
@@ -467,30 +528,14 @@ The status posting endpoint takes an additional parameter, `in_reply_to_conversa
 }
 ```
 
-## `GET /api/pleroma/emoji/packs/:name`
+## `GET /api/pleroma/emoji/packs/archive?name=:name`
 
-### Get pack.json for the pack
+### Requests a local pack archive from the instance
 
 * Method `GET`
 * Authentication: not required
 * Params:
-  * `page`: page number for files (default 1)
-  * `page_size`: page size for files (default 30)
-* Response: JSON, pack json with `files`, `files_count` and `pack` keys with 200 status or 404 if the pack does not exist.
-
-```json
-{
-  "files": {...},
-  "files_count": 0, // emoji count in pack
-  "pack": {...}
-}
-```
-
-## `GET /api/pleroma/emoji/packs/:name/archive`
-### Requests a local pack archive from the instance
-* Method `GET`
-* Authentication: not required
-* Params: None
+  * `name`: pack name
 * Response: the archive of the pack with a 200 status code, 403 if the pack is not set as shared,
   404 if the pack does not exist
 
diff --git a/docs/administration/CLI_tasks/email.md b/docs/administration/CLI_tasks/email.md
index 00d2e74f8..d9aa0e71b 100644
--- a/docs/administration/CLI_tasks/email.md
+++ b/docs/administration/CLI_tasks/email.md
@@ -1,4 +1,4 @@
-# Managing emails
+# EMail administration tasks
 
 {! backend/administration/CLI_tasks/general_cli_task_info.include !}
 
@@ -30,3 +30,17 @@ Example:
     ```sh
     mix pleroma.email test --to root@example.org
     ```
+
+## Send confirmation emails to all unconfirmed user accounts
+
+=== "OTP"
+
+    ```sh
+     ./bin/pleroma_ctl email send_confirmation_mails
+    ```
+
+=== "From Source"
+
+    ```sh
+    mix pleroma.email send_confirmation_mails
+    ```
diff --git a/docs/administration/CLI_tasks/user.md b/docs/administration/CLI_tasks/user.md
index 3e7f028ba..c64ed4f22 100644
--- a/docs/administration/CLI_tasks/user.md
+++ b/docs/administration/CLI_tasks/user.md
@@ -224,9 +224,10 @@
     ```
 
 ### Options
+- `--admin`/`--no-admin` - whether the user should be an admin
+- `--confirmed`/`--no-confirmed` - whether the user account is confirmed
 - `--locked`/`--no-locked` - whether the user should be locked
 - `--moderator`/`--no-moderator` - whether the user should be a moderator
-- `--admin`/`--no-admin` - whether the user should be an admin
 
 ## Add tags to a user
 
@@ -271,3 +272,33 @@
     ```sh
     mix pleroma.user toggle_confirmed <nickname>
     ```
+
+## Set confirmation status for all regular active users
+*Admins and moderators are excluded*
+
+=== "OTP"
+
+    ```sh
+     ./bin/pleroma_ctl user confirm_all
+    ```
+
+=== "From Source"
+
+    ```sh
+    mix pleroma.user confirm_all
+    ```
+
+## Revoke confirmation status for all regular active users
+*Admins and moderators are excluded*
+
+=== "OTP"
+
+    ```sh
+     ./bin/pleroma_ctl user unconfirm_all
+    ```
+
+=== "From Source"
+
+    ```sh
+    mix pleroma.user unconfirm_all
+    ```
diff --git a/docs/administration/backup.md b/docs/administration/backup.md
index be57bf74a..b49ff07fb 100644
--- a/docs/administration/backup.md
+++ b/docs/administration/backup.md
@@ -5,20 +5,24 @@
 1. Stop the Pleroma service.
 2. Go to the working directory of Pleroma (default is `/opt/pleroma`)
 3. Run `sudo -Hu postgres pg_dump -d <pleroma_db> --format=custom -f </path/to/backup_location/pleroma.pgdump>` (make sure the postgres user has write access to the destination file)
-4. Copy `pleroma.pgdump`, `config/prod.secret.exs` and the `uploads` folder to your backup destination. If you have other modifications, copy those changes too.
+4. Copy `pleroma.pgdump`, `config/prod.secret.exs`, `config/setup_db.psql` (if still available) and the `uploads` folder to your backup destination. If you have other modifications, copy those changes too.
 5. Restart the Pleroma service.
 
 ## Restore/Move
 
-1. Optionally reinstall Pleroma (either on the same server or on another server if you want to move servers). Try to use the same database name.
+1. Optionally reinstall Pleroma (either on the same server or on another server if you want to move servers).
 2. Stop the Pleroma service.
 3. Go to the working directory of Pleroma (default is `/opt/pleroma`)
 4. Copy the above mentioned files back to their original position.
-5. Drop the existing database and recreate an empty one `sudo -Hu postgres psql -c 'DROP DATABASE <pleroma_db>;';` `sudo -Hu postgres psql -c 'CREATE DATABASE <pleroma_db>;';`
-6. Run `sudo -Hu postgres pg_restore -d <pleroma_db> -v -1 </path/to/backup_location/pleroma.pgdump>`
-7. If you installed a newer Pleroma version, you should run `mix ecto.migrate`[^1]. This task performs database migrations, if there were any.
-8. Restart the Pleroma service.
-9. Run `sudo -Hu postgres vacuumdb --all --analyze-in-stages`. This will quickly generate the statistics so that postgres can properly plan queries.
+5. Drop the existing database if restoring in-place. `sudo -Hu postgres psql -c 'DROP DATABASE <pleroma_db>;'` 
+6. Restore the database schema and pleroma postgres role the with the original `setup_db.psql` if you have it: `sudo -Hu postgres psql -f config/setup_db.psql`. 
+
+  Alernatively, run the `mix pleroma.instance gen` task again. You can ignore most of the questions, but make the database user, name, and password the same as found in your backup of `config/prod.secret.exs`. Then run the restoration of the pleroma role and schema with of the generated `config/setup_db.psql` as instructed above. You may delete the `config/generated_config.exs` file as it is not needed.
+
+7. Now restore the Pleroma instance's data into the empty database schema: `sudo -Hu postgres pg_restore -d <pleroma_db> -v -1 </path/to/backup_location/pleroma.pgdump>`
+8. If you installed a newer Pleroma version, you should run `mix ecto.migrate`[^1]. This task performs database migrations, if there were any.
+9. Restart the Pleroma service.
+10. Run `sudo -Hu postgres vacuumdb --all --analyze-in-stages`. This will quickly generate the statistics so that postgres can properly plan queries.
 
 [^1]: Prefix with `MIX_ENV=prod` to run it using the production config file.
 
diff --git a/docs/configuration/cheatsheet.md b/docs/configuration/cheatsheet.md
index 7cf1d1ce7..ea7dfec98 100644
--- a/docs/configuration/cheatsheet.md
+++ b/docs/configuration/cheatsheet.md
@@ -18,7 +18,7 @@ To add configuration to your config file, you can copy it from the base config.
 * `notify_email`: Email used for notifications.
 * `description`: The instance’s description, can be seen in nodeinfo and ``/api/v1/instance``.
 * `limit`: Posts character limit (CW/Subject included in the counter).
-* `discription_limit`: The character limit for image descriptions.
+* `description_limit`: The character limit for image descriptions.
 * `chat_limit`: Character limit of the instance chat messages.
 * `remote_limit`: Hard character limit beyond which remote posts will be dropped.
 * `upload_limit`: File size limit of uploads (except for avatar, background, banner).
@@ -40,7 +40,6 @@ To add configuration to your config file, you can copy it from the base config.
 * `allow_relay`: Enable Pleroma’s Relay, which makes it possible to follow a whole instance.
 * `public`: Makes the client API in authenticated mode-only except for user-profiles. Useful for disabling the Local Timeline and The Whole Known Network. Note that there is a dependent setting restricting or allowing unauthenticated access to specific resources, see `restrict_unauthenticated` for more details.
 * `quarantined_instances`: List of ActivityPub instances where private (DMs, followers-only) activities will not be send.
-* `managed_config`: Whenether the config for pleroma-fe is configured in [:frontend_configurations](#frontend_configurations) or in ``static/config.json``.
 * `allowed_post_formats`: MIME-type list of formats allowed to be posted (transformed into HTML).
 * `extended_nickname_format`: Set to `true` to use extended local nicknames format (allows underscores/dashes). This will break federation with
     older software for theses nicknames.
@@ -226,6 +225,16 @@ Enables the worker which processes posts scheduled for deletion. Pinned posts ar
 
 * `enabled`: whether expired activities will be sent to the job queue to be deleted
 
+## FedSockets
+FedSockets is an experimental feature allowing for Pleroma backends to federate using a persistant websocket connection as opposed to making each federation a seperate http connection. This feature is currently off by default. It is configurable throught he following options.
+
+### :fedsockets
+* `enabled`: Enables FedSockets for this instance. `false` by default.
+* `connection_duration`: Time an idle websocket is kept open.
+* `rejection_duration`: Failures to connect via FedSockets will not be retried for this period of time.
+* `fed_socket_fetches` and `fed_socket_rejections`: Settings passed to `cachex` for the fetch registry, and rejection stacks. See `Pleroma.Web.FedSockets` for more details.
+
+
 ## Frontends
 
 ### :frontend_configurations
@@ -315,6 +324,14 @@ This section describe PWA manifest instance-specific values. Currently this opti
   * `enabled`: Enables purge cache
   * `provider`: Which one of  the [purge cache strategy](#purge-cache-strategy) to use.
 
+## :media_preview_proxy
+
+* `enabled`: Enables proxying of remote media preview to the instance’s proxy. Requires enabled media proxy (`media_proxy/enabled`).
+* `thumbnail_max_width`: Max width of preview thumbnail for images (video preview always has original dimensions).
+* `thumbnail_max_height`: Max height of preview thumbnail for images (video preview always has original dimensions).
+* `image_quality`: Quality of the output. Ranges from 0 (min quality) to 100 (max quality).
+* `min_content_length`: Min content length to perform preview, in bytes. If greater than 0, media smaller in size will be served as is, without thumbnailing.
+
 ### Purge cache strategy
 
 #### Pleroma.Web.MediaProxy.Invalidation.Script
@@ -409,9 +426,9 @@ This will make Pleroma listen on `127.0.0.1` port `8080` and generate urls start
 Available options:
 
 * `enabled` - Enable/disable the plug. Defaults to `false`.
-* `headers` - A list of strings naming the `req_headers` to use when deriving the `remote_ip`. Order does not matter. Defaults to `["x-forwarded-for"]`.
-* `proxies` - A list of strings in [CIDR](https://en.wikipedia.org/wiki/CIDR) notation specifying the IPs of known proxies. Defaults to `[]`.
-* `reserved` - Defaults to [localhost](https://en.wikipedia.org/wiki/Localhost) and [private network](https://en.wikipedia.org/wiki/Private_network).
+* `headers` - A list of strings naming the HTTP headers to use when deriving the true client IP address. Defaults to `["x-forwarded-for"]`.
+* `proxies` - A list of upstream proxy IP subnets in CIDR notation from which we will parse the content of `headers`. Defaults to `[]`. IPv4 entries without a bitmask will be assumed to be /32 and IPv6 /128.
+* `reserved` - A list of reserved IP subnets in CIDR notation which should be ignored if found in `headers`. Defaults to `["127.0.0.0/8", "::1/128", "fc00::/7", "10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"]`.
 
 
 ### :rate_limit
diff --git a/docs/installation/alpine_linux_en.md b/docs/installation/alpine_linux_en.md
index f393e4978..62f2fb778 100644
--- a/docs/installation/alpine_linux_en.md
+++ b/docs/installation/alpine_linux_en.md
@@ -21,6 +21,9 @@ It assumes that you have administrative rights, either as root or a user with [s
 
 * `nginx` (preferred, example configs for other reverse proxies can be found in the repo)
 * `certbot` (or any other ACME client for Let’s Encrypt certificates)
+* `ImageMagick`
+* `ffmpeg`
+* `exiftool`
 
 ### Prepare the system
 
@@ -30,7 +33,6 @@ It assumes that you have administrative rights, either as root or a user with [s
 awk 'NR==2' /etc/apk/repositories | sed 's/main/community/' | tee -a /etc/apk/repositories
 ```
 
-
 * Then update the system, if not already done:
 
 ```shell
@@ -57,6 +59,7 @@ sudo apk add erlang erlang-runtime-tools erlang-xmerl elixir
 ```shell
 sudo apk add erlang-eldap
 ```
+
 ### Install PostgreSQL
 
 * Install Postgresql server:
@@ -77,6 +80,12 @@ sudo /etc/init.d/postgresql start
 sudo rc-update add postgresql
 ```
 
+### Install media / graphics packages (optional, see [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md))
+
+```shell
+sudo apk add ffmpeg imagemagick exiftool
+```
+
 ### Install PleromaBE
 
 * Add a new system user for the Pleroma service:
diff --git a/docs/installation/arch_linux_en.md b/docs/installation/arch_linux_en.md
index 99eb011ad..0eb6d2d5f 100644
--- a/docs/installation/arch_linux_en.md
+++ b/docs/installation/arch_linux_en.md
@@ -16,6 +16,9 @@ This guide will assume that you have administrative rights, either as root or a
 
 * `nginx` (preferred, example configs for other reverse proxies can be found in the repo)
 * `certbot` (or any other ACME client for Let’s Encrypt certificates)
+* `ImageMagick`
+* `ffmpeg`
+* `exiftool`
 
 ### Prepare the system
 
@@ -53,6 +56,12 @@ sudo -iu postgres initdb -D /var/lib/postgres/data
 sudo systemctl enable --now postgresql.service
 ```
 
+### Install media / graphics packages (optional, see [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md))
+
+```shell
+sudo pacman -S ffmpeg imagemagick perl-image-exiftool
+```
+
 ### Install PleromaBE
 
 * Add a new system user for the Pleroma service:
diff --git a/docs/installation/debian_based_en.md b/docs/installation/debian_based_en.md
index 58d15ce14..6a9026d94 100644
--- a/docs/installation/debian_based_en.md
+++ b/docs/installation/debian_based_en.md
@@ -19,6 +19,9 @@ This guide will assume you are on Debian Stretch. This guide should also work wi
 
 * `nginx` (preferred, example configs for other reverse proxies can be found in the repo)
 * `certbot` (or any other ACME client for Let’s Encrypt certificates)
+* `ImageMagick`
+* `ffmpeg`
+* `exiftool`
 
 ### Prepare the system
 
@@ -51,6 +54,12 @@ sudo apt update
 sudo apt install elixir erlang-dev erlang-nox
 ```
 
+### Optional packages: [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md)
+
+```shell
+sudo apt install imagemagick ffmpeg libimage-exiftool-perl
+```
+
 ### Install PleromaBE
 
 * Add a new system user for the Pleroma service:
diff --git a/docs/installation/debian_based_jp.md b/docs/installation/debian_based_jp.md
index d98162796..94e22325c 100644
--- a/docs/installation/debian_based_jp.md
+++ b/docs/installation/debian_based_jp.md
@@ -23,6 +23,9 @@
 
 - `nginx` (おすすめです。他のリバースプロキシを使う場合は、参考となる設定をこのリポジトリから探してください)
 - `certbot` (または何らかのLet's Encrypt向けACMEクライアント)
+- `ImageMagick`
+- `ffmpeg`
+- `exiftool`
 
 ### システムを準備する
 
@@ -34,10 +37,9 @@ sudo apt full-upgrade
 
 * 上記に挙げたパッケージをインストールしておきます。
 ```
-sudo apt install git build-essential postgresql postgresql-contrib cmake libmagic-dev
+sudo apt install git build-essential postgresql postgresql-contrib cmake ffmpeg imagemagick libmagic-dev
 ```
 
-
 ### ElixirとErlangをインストールします
 
 * Erlangのリポジトリをダウンロードおよびインストールします。
@@ -52,6 +54,12 @@ sudo apt update
 sudo apt install elixir erlang-dev erlang-nox
 ```
 
+### オプションパッケージ: [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md)
+
+```shell
+sudo apt install imagemagick ffmpeg libimage-exiftool-perl
+```
+
 ### Pleroma BE (バックエンド) をインストールします
 
 *  Pleroma用に新しいユーザーを作ります。
diff --git a/docs/installation/freebsd_en.md b/docs/installation/freebsd_en.md
index ca2575d9b..fdcb06c53 100644
--- a/docs/installation/freebsd_en.md
+++ b/docs/installation/freebsd_en.md
@@ -26,6 +26,12 @@ Setup the required services to automatically start at boot, using `sysrc(8)`.
 # service postgresql start
 ```
 
+### Install media / graphics packages (optional, see [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md))
+
+```shell
+# pkg install imagemagick ffmpeg p5-Image-ExifTool
+```
+
 ## Configuring Pleroma
 
 Create a user for Pleroma:
diff --git a/docs/installation/gentoo_en.md b/docs/installation/gentoo_en.md
index 0f7ed9d47..f2380ab72 100644
--- a/docs/installation/gentoo_en.md
+++ b/docs/installation/gentoo_en.md
@@ -36,6 +36,9 @@ Gentoo quite pointedly does not come with a cron daemon installed, and as such i
 * `www-servers/nginx` (preferred, example configs for other reverse proxies can be found in the repo)
 * `app-crypt/certbot` (or any other ACME client for Let’s Encrypt certificates)
 * `app-crypt/certbot-nginx` (nginx certbot plugin that allows use of the all-powerful `--nginx` flag on certbot)
+* `media-gfx/imagemagick`
+* `media-video/ffmpeg`
+* `media-libs/exiftool`
 
 ### Prepare the system
 
@@ -88,6 +91,12 @@ If you do not plan to make any modifications to your Pleroma instance, cloning d
 
 Not only does this make it much easier to deploy changes you make, as you can commit and pull from upstream and all that good stuff from the comfort of your local machine then simply `git pull` on your instance server when you're ready to deploy, it also ensures you are compliant with the Affero General Public Licence that Pleroma is licenced under, which stipulates that all network services provided with modified AGPL code must publish their changes on a publicly available internet service and for free. It also makes it much easier to ask for help from and provide help to your fellow Pleroma admins if your public repo always reflects what you are running because it is part of your deployment procedure.
 
+### Install media / graphics packages (optional, see [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md))
+
+```shell
+# emerge --ask media-video/ffmpeg media-gfx/imagemagick media-libs/exiftool
+```
+
 ### Install PleromaBE
 
 * Add a new system user for the Pleroma service and set up default directories:
diff --git a/docs/installation/netbsd_en.md b/docs/installation/netbsd_en.md
index 6ad0de2f6..d5fa04fdf 100644
--- a/docs/installation/netbsd_en.md
+++ b/docs/installation/netbsd_en.md
@@ -10,7 +10,7 @@ Pleroma uses.
 
 The `mksh` shell is needed to run the Elixir `mix` script.
 
-`# pkgin install acmesh elixir git-base git-docs mksh nginx postgresql11-server postgresql11-client postgresql11-contrib sudo`
+`# pkgin install acmesh elixir git-base git-docs mksh nginx postgresql11-server postgresql11-client postgresql11-contrib sudo ffmpeg4 ImageMagick`
 
 You can also build these packages using pkgsrc:
 ```
@@ -44,6 +44,10 @@ pgsql=YES
 
 First, run `# /etc/rc.d/pgsql start`. Then, `$ sudo -Hu pgsql -g pgsql createdb`.
 
+### Install media / graphics packages (optional, see [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md))
+
+`# pkgin install ImageMagick ffmpeg4 p5-Image-ExifTool`
+
 ## Configuring Pleroma
 
 Create a user for Pleroma:
diff --git a/docs/installation/openbsd_en.md b/docs/installation/openbsd_en.md
index eee452845..8092ac379 100644
--- a/docs/installation/openbsd_en.md
+++ b/docs/installation/openbsd_en.md
@@ -10,20 +10,34 @@ The following packages need to be installed:
 
   * elixir
   * gmake
-  * ImageMagick
   * git
   * postgresql-server
   * postgresql-contrib
   * cmake
+  * ffmpeg
+  * ImageMagick
 
 To install them, run the following command (with doas or as root):
 
 ```
-pkg_add elixir gmake ImageMagick git postgresql-server postgresql-contrib cmake
+pkg_add elixir gmake git postgresql-server postgresql-contrib cmake ffmpeg ImageMagick
 ```
 
 Pleroma requires a reverse proxy, OpenBSD has relayd in base (and is used in this guide) and packages/ports are available for nginx (www/nginx) and apache (www/apache-httpd). Independently of the reverse proxy, [acme-client(1)](https://man.openbsd.org/acme-client) can be used to get a certificate from Let's Encrypt.
 
+#### Optional software
+
+Per [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md):
+  * ImageMagick
+  * ffmpeg
+  * exiftool
+
+To install the above:
+
+```
+pkg_add ImageMagick ffmpeg p5-Image-ExifTool
+```
+
 #### Creating the pleroma user
 Pleroma will be run by a dedicated user, \_pleroma. Before creating it, insert the following lines in login.conf:
 ```
diff --git a/docs/installation/openbsd_fi.md b/docs/installation/openbsd_fi.md
index b5b5056a9..01cf34ab4 100644
--- a/docs/installation/openbsd_fi.md
+++ b/docs/installation/openbsd_fi.md
@@ -16,7 +16,18 @@ Matrix-kanava #freenode_#pleroma:matrix.org ovat hyviä paikkoja löytää apua
 
 Asenna tarvittava ohjelmisto:
 
-`# pkg_add git elixir gmake postgresql-server-10.3 postgresql-contrib-10.3 cmake`
+`# pkg_add git elixir gmake postgresql-server-10.3 postgresql-contrib-10.3 cmake ffmpeg ImageMagick`
+
+#### Optional software
+
+[`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md):
+  * ImageMagick
+  * ffmpeg
+  * exiftool
+
+Asenna tarvittava ohjelmisto:
+
+`# pkg_add ImageMagick ffmpeg p5-Image-ExifTool`
 
 Luo postgresql-tietokanta:
 
diff --git a/docs/installation/optional/media_graphics_packages.md b/docs/installation/optional/media_graphics_packages.md
new file mode 100644
index 000000000..cb3d71188
--- /dev/null
+++ b/docs/installation/optional/media_graphics_packages.md
@@ -0,0 +1,32 @@
+# Optional software packages needed for specific functionality
+
+For specific Pleroma functionality (which is disabled by default) some or all of the below packages are required:
+  * `ImageMagic`
+  * `ffmpeg`
+  * `exiftool`
+  
+Please refer to documentation in `docs/installation` on how to install them on specific OS.
+  
+Note: the packages are not required with the current default settings of Pleroma.
+
+## `ImageMagick`
+
+`ImageMagick` is a set of tools to create, edit, compose, or convert bitmap images.
+
+It is required for the following Pleroma features:
+  * `Pleroma.Upload.Filters.Mogrify`, `Pleroma.Upload.Filters.Mogrifun` upload filters (related config: `Plaroma.Upload/filters` in `config/config.exs`)
+  * Media preview proxy for still images (related config: `media_preview_proxy/enabled` in `config/config.exs`)
+  
+## `ffmpeg`
+
+`ffmpeg` is software to record, convert and stream audio and video.
+
+It is required for the following Pleroma features:
+  * Media preview proxy for videos (related config: `media_preview_proxy/enabled` in `config/config.exs`)
+
+## `exiftool`
+
+`exiftool` is media files metadata reader/writer.
+
+It is required for the following Pleroma features:
+  * `Pleroma.Upload.Filters.Exiftool` upload filter (related config: `Plaroma.Upload/filters` in `config/config.exs`)
diff --git a/docs/installation/otp_en.md b/docs/installation/otp_en.md
index 32f04a9c4..62d4c8a72 100644
--- a/docs/installation/otp_en.md
+++ b/docs/installation/otp_en.md
@@ -41,6 +41,25 @@ Other than things bundled in the OTP release Pleroma depends on:
     apt install curl unzip libncurses5 postgresql postgresql-contrib nginx certbot libmagic-dev
     ```
 
+### Installing optional packages
+
+Per [`docs/installation/optional/media_graphics_packages.md`](docs/installation/optional/media_graphics_packages.md):
+  * ImageMagick
+  * ffmpeg
+  * exiftool
+
+=== "Alpine"
+    ```
+    echo "http://nl.alpinelinux.org/alpine/latest-stable/community" >> /etc/apk/repositories
+    apk update
+    apk add imagemagick ffmpeg exiftool
+    ```
+
+=== "Debian/Ubuntu"
+    ```
+    apt install imagemagick ffmpeg libimage-exiftool-perl
+    ```
+
 ## Setup
 ### Configuring PostgreSQL
 #### (Optional) Installing RUM indexes
@@ -83,6 +102,8 @@ It is encouraged to check [Optimizing your PostgreSQL performance](../configurat
 If you are using PostgreSQL 12 or higher, add this to your Ecto database configuration
 
 ```elixir
+#
+config :pleroma, Pleroma.Repo,
 prepare: :named,
 parameters: [
   plan_cache_mode: "force_custom_plan"