Floatplane for Jellyfin

A Jellyfin server plugin that brings your Floatplane subscriptions into Jellyfin. Creators, their sub-channels and every video appear as a Floatplane channel under My Media in the web client and in all Jellyfin apps, and play through the normal Jellyfin player — with watched state, resume, "Continue Watching", "Recently Added" and search, like any other library.

Features

• Creators → All videos → sub-channels. Each creator you subscribe to gets an All videos folder (every sub-channel in release order, newest first) plus one folder per sub-channel (TechLinked, ShortCircuit, …).
• Real metadata: thumbnail, description, duration, release date, sub-channel as Genre, creator as Studio.
• Newest first by default in every Jellyfin client, without touching the sort menu.
• Watched/resume state is shared between the All videos copy and the sub-channel copy of a video.
• Low-CPU playback: the server remuxes Floatplane's H.264/AAC stream (stream copy, no re-encode). Quality levels show up as Versions.
• Home screen integration: "Recently Added in Floatplane" and "Continue Watching" work out of the box.
• Browse without logging in: public creators (e.g. linustechtips) can be listed by url-name; playback needs a logged-in session.
• Search test tool for Floatplane's own search API on the settings page, and a scheduled task that refreshes the catalogue.

Requirements

Jellyfin	10.10.x (plugin targetAbi 10.10.0.0, .NET 8). Jellyfin 12.x needs a separate build (not available yet).
Architecture	one AnyCPU DLL — runs unchanged on x64 and arm64 (Raspberry Pi 4/5 etc.).
Floatplane	an account with an active subscription for playback.

Install

From the plugin repository (recommended)

1. Dashboard → Plugins → Repositories → +. Name it anything and use this URL:

   https://gitea.brasse-pc.eu/brasse/jellyfin-plugin-floatplane/releases/download/latest/manifest.json
   

2. Dashboard → Plugins → Catalog → section Channels → Floatplane → Install.

3. Restart Jellyfin. The plugin shows as Active under My Plugins.

Updates then appear in the catalog like any other plugin.

With the install script (Docker — linuxserver.io or official image — or a native install; detects the right plugin directory, verifies the checksum, restarts Jellyfin):

curl -fsSL https://gitea.brasse-pc.eu/brasse/jellyfin-plugin-floatplane/releases/download/latest/install.sh | sh -s -- --dry-run
curl -fsSL https://gitea.brasse-pc.eu/brasse/jellyfin-plugin-floatplane/releases/download/latest/install.sh | sh

Environment overrides: TAG (latest or vX.Y.Z), JELLYFIN_CONTAINER (default jellyfin, empty = native), JELLYFIN_CONFIG_DIR, PLUGINS_DIR, PUID/PGID.

Manually: download floatplane_<version>.zip from the releases, unzip it into <jellyfin data>/plugins/Floatplane_<version>/ and restart.

Log in

Floatplane's password login requires a Cloudflare captcha that only works on floatplane.com, so the plugin cannot ask for your username and password. Two options, both on Dashboard → Plugins → Floatplane:

1. Session cookie (works today): log in at floatplane.com in a browser, copy the value of the sails.sid cookie (DevTools → Application/Storage → Cookies), paste it into the settings page, press Validate cookie (shows your username and subscriptions) and Save.
2. Login with Floatplane (OAuth device flow — the way Floatplane's own apps and clients like Hydravion or Wasserflug log in). This needs a client id issued by Floatplane; without one the button reports invalid_client.

Step-by-step instructions, every setting explained and troubleshooting: doc/usage.md.

How it works (short)

• The channel lists creators → All videos / sub-channels → posts from Floatplane's public listing API (ids creator:…, all:…, channel:…, post:…, cpost:…).
• On play, the plugin fetches the post details with your session and hands Jellyfin signed URLs to its own Floatplane/Stream/… endpoints.
• The stream endpoint asks Floatplane for the stream info (cached 6 h, throttled to the ~2/min the API allows), downloads the HLS playlist and rewrites it: the AES-128 key is fetched through the plugin with your session, the video segments go straight to Floatplane's CDN. Jellyfin's ffmpeg then stream-copies the result to the client.
• A scheduled task refreshes the catalogue and bumps the channel cache key so Jellyfin re-lists the folders.

Development

git clone https://gitea.brasse-pc.eu/brasse/jellyfin-plugin-floatplane.git
cd jellyfin-plugin-floatplane
dotnet test                       # 59 unit tests (models, HLS rewriter, API client, catalogue)
scripts/package.sh                # → build/Floatplane_<ver>/ (DLL, meta.json, thumb.png), build/floatplane_<ver>.zip (+ .md5)
scripts/package.sh 1.2.3.0 https://example.com/dl   # versioned package + build/manifest.json

• Needs the .NET 8 SDK; the test host also needs the ASP.NET Core 8 shared runtime (Arch: sudo pacman -S dotnet-sdk-8.0 aspnet-runtime-8.0).

• The VS Code build task (Ctrl+Shift+B) runs scripts/package.sh.

• Local end-to-end test against a throw-away Jellyfin of the right version:

  mkdir -p .jellyfin-test/config/data/plugins
  cp -r build/Floatplane_0.2.0.0 .jellyfin-test/config/data/plugins/      # writable copy
  docker run --rm -p 8096:8096 -v "$PWD/.jellyfin-test/config:/config" \
    lscr.io/linuxserver/jellyfin:10.10.7ubu2404-ls80
  # logs: .jellyfin-test/config/log/log_*.log — plugin status: Dashboard → Plugins
  

• Every push to master runs the tests and publishes the rolling latest release (zip, md5, manifest.json, install.sh); a vX.Y.Z tag publishes a versioned release.

More: doc/plan.md (milestones, roadmap), doc/floatplane-api-notes.md (the API as observed), doc/research/ (Jellyfin plugin + Floatplane API research and reference sources), and the project wiki.

Credits & disclaimer

Unofficial, not affiliated with or endorsed by Floatplane Media Inc. The plugin uses Floatplane's unofficial API documented by the community (jamamp/FloatplaneAPI) and borrows the channel + signed-proxy pattern from chaosflix-jellyfin. Use it with your own subscription, for personal viewing. The Floatplane name and logo belong to Floatplane Media Inc.