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- </head><title>Milestone: Port Media handling from v2 - GNU social V3</title>
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- <h3><a class="ablack" href="milestone-port-media-handling-from-v2.html">
- Milestone: Port Media handling from v2
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- <!-- bashblog_timestamp: #202105031337.42# -->
- <div class="subtitle">May 03, 2021 —
- GNU social development team
- </div>
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- <p><strong><a href="https://agile.gnusocial.rocks/doku.php?id=milestones:attachment_media_embed_handling">>WIKI Milestone entry</a></strong></p>
-
- <p>File Storage in GNU social is used for avatars, for notes containing
- attachments, and for notes containing links (in which case is an Embed preview).
- Notes can be created by local users or fetched from remote actors. Filehash is
- used to reduce file duplication.</p>
-
- <p>When a user shares a Link that uses OpenGraph tags or has an OEmbed provider,
- the <a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/Embed">Embed plugin</a> generates a preview for it that may contain a thumbnail.</p>
-
- <p>When a user shares a Link to an image, the <a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/StoreRemoteMedia">StoreRemoteMedia plugin</a> can fetch the
- file and make it available as an attachment, and will generate a thumbnail.</p>
-
- <p>When an image, video, or other file type is uploaded or retrieved, an Attachment
- entity is created. When a thumbnail is requested, one is generated if an
- EncoderPlugin that supports the mime type is available.</p>
-
- <p>There are two EncoderPlugins implemented:</p>
-
- <ul>
- <li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/ImageEncoder">ImageEncoder</a>: Allows to compress, validate, rescale, and sanitize images using VIPS.</li>
- <li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/VideoEncoder">VideoEncoder</a>: Allows to rescale gifs using FFMpeg.</li>
- </ul>
-
- <p>Another helpful plugin is <a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/plugins/FileQuota">FileQuota</a> which ensures a user stays under the file quota.</p>
-
- <h2>How is the code organised?</h2>
-
- <p>There are various entities related to attachment and thumbnail handling.
- The key ones are:</p>
-
- <ul>
- <li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/src/Entity/Attachment.php">Attachment</a></li>
- <li><a href="https://code.undefinedhackers.net/GNUsocial/gnu-social/src/branch/v3/src/Entity/AttachmentThumbnail.php">AttachmentThumbnail</a></li>
- </ul>
-
- <p>The plugins are able to act by means of the Events system, as elaborated in the
- <a href="https://docs.gnusocial.rocks/developer/storage.html">documentation</a>.</p>
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