peter d2ba65e383 fix(plex): the subtitle poll backs off on errors, a failed <track> is replaced, and a resume asks for the right window
Deep-review R2, plus one defect found while verifying it on localdev.

- The status poll re-armed every second after a FAILED request: `data` stays empty on an error,
  so it read as "still preparing" for as long as the player was open — and the request was not
  quiet, so a persistent 500 re-opened the global error dialog every second. It now backs off to
  10 s (a blip still heals on its own) and is quiet; the player already shows the failure inline.
- A <track> whose own VTT fetch failed never fetched again: with the server's answer unchanged its
  key was unchanged, so React kept the dead element — silently blank subtitles. The key (now built
  in the hook, where it is tested) carries a failed-load count; after two remounts the track is
  reported as unavailable instead.
- Found in UAT: until the first timeupdate `abs` is 0, so after a resume every poll said at=0 and
  the first window was cut around the head of the film (a resume at 20:00 polled at=0 for as long
  as it stayed paused). The poll reports the session's start until playback ticks. And the window's
  dedup identity is the track plus a window-length bucket of its start — keyed on the track alone
  (R1), the right window queued behind that wrong one.

The poll's start/stop rules finally have tests (every earlier one resolved a single fixed answer).
Verified on localdev against Westworld S1E6 resumed at 20:00: the polls carried at=1197, one
subtitle line on screen at 21:02, the poll stopped at `ready`; the real file's window (56 cues) +
full pass (608) merged to 608 — the old merge would have served 664. 11 mutations, all red.
2026-09-11 01:08:27 +02:00

Siftlode

Your YouTube subscriptions, the way a feed should work. Siftlode pulls every upload from the channels you follow into one clean, filterable feed — no algorithm deciding what you see, and no Shorts or livestream noise unless you want it. Self-hosted, multi-user, and private: your data stays on your own server.

Siftlode feed

Everything expensive (channels, videos, metadata) is fetched from YouTube once and stored locally, so filtering, searching and sorting are instant and don't burn API quota. Click a video to watch it in an in-app player that resumes where you left off — or open it on youtube.com so your own ad blocker and SponsorBlock keep working.

Features

  • A readable subscription feed — sort and filter by channel, tag, language, topic, length, upload date or watch state; hide channels without unsubscribing; save filter setups as named views.
  • Search all of YouTube from the feed — live results you can play, save or add to playlists like any other video; they stay temporary and out of your catalog unless you keep one.
  • Channel pages & a channel manager — per-channel stats and uploads, priorities, and your own tags to slice the feed by.
  • Playlists with two-way YouTube sync — build them locally, keep them in sync in both directions.
  • In-app player with resume, plus keyboard/scroll controls.
  • Download Center — save videos to the server with yt-dlp in a Plex-friendly layout (format presets, per-user storage quota), trim / crop / split & join them in a built-in editor, then save to your device, share with another user, or hand out a public watch link.
  • Plex library (optional) — point Siftlode at your own Plex server to browse and play its movies and shows alongside your feed, with watch state kept in sync.
  • Multi-user with per-user private state, a shared catalog, and a fair daily API-quota guard.
  • Self-hosted & private, with a first-run web setup wizard and the interface in English and Hungarian.

Quick start (self-hosting)

You don't need to build anything — Siftlode runs from a prebuilt public image, and all configuration (your admin account, Google sign-in, email) happens in a first-run web wizard. You need Docker with the Compose plugin.

1. Get the files and run the installer:

git clone https://git.b1fr0st.eu/peter/siftlode.git
cd siftlode
./install.sh          # Windows (PowerShell):  ./install.ps1

The installer generates a private .env (secrets), pulls the image, starts the app + database, and prints a one-time setup URL like http://localhost:8080/setup?token=….

2. Finish in your browser. Open that URL and follow the wizard:

  1. Admin account — the email + password you'll sign in with.
  2. Google sign-in (optional) — paste a Google OAuth client to enable "Sign in with Google" and pulling your YouTube subscriptions. Skip it to use email + password only.
  3. Email / SMTP (optional) — for verification/notification emails. Skip it and you (the admin) simply approve new accounts yourself.

Then sign in with your admin account. That's it. See docs/self-hosting.md for the full walkthrough.

Just trying it out? Press Enter at the installer's URL prompt to run on http://localhost:8080.

Build from source (alternative)

Prefer to build the image yourself instead of pulling it:

git clone https://git.b1fr0st.eu/peter/siftlode.git
cd siftlode
cp .env.example .env
# generate the two secrets and paste them into .env:
python -c "import secrets;print('SECRET_KEY='+secrets.token_urlsafe(48))"
python -c "import base64,os;print('TOKEN_ENCRYPTION_KEY='+base64.urlsafe_b64encode(os.urandom(32)).decode())"
docker compose up --build -d      # builds from the included Dockerfile

Open http://localhost:8080 and finish in the setup wizard as above. (Set a POSTGRES_PASSWORD in .env too.)

HTTPS / public access

Port 8080 over plain HTTP is fine for a LAN or a quick trial. For public access put a reverse proxy (Caddy, Nginx, Traefik…) in front to terminate TLS, and set the public URL (the installer prompt, or OAUTH_REDIRECT_URL in .env) to your https://… address — this also marks the session cookie secure. Add that same …/auth/callback URL to your Google OAuth client's authorized redirect URIs. Behind a proxy, also set TRUSTED_PROXY_IPS so the rate limiters see the real client IP and can't be bypassed via a forged X-Forwarded-For — see docs/self-hosting.md.

Updating & backups

docker compose -f docker-compose.selfhost.yml pull   # or: docker compose pull
docker compose -f docker-compose.selfhost.yml up -d

That follows latest, which moves with every release. Set IMAGE_TAG=0.80.0 in .env to pin a version and upgrade on your own schedule; released versions are listed in CHANGELOG.md and in the app's Release Notes. The registry keeps only the newest few of those, so a pin decides when you take the next hop rather than letting you stay put forever — see docs/self-hosting.md.

Back up before upgrading. Migrations run automatically on startup and are not undone by pulling the old image back. A backup is the database dump plus your .env — TOKEN_ENCRYPTION_KEY is what decrypts the Google, SMTP and Plex secrets stored in that database, so a dump restored without it is only half an instance. Use scripts/backup.sh (or backup.ps1 on Windows) and scripts/restore.sh; the equivalent one-liners, the pinning recipe and the rollback steps are in docs/self-hosting.md.

How it works

  • Shared catalog, private state. Channels and videos are stored once and shared; each user's subscriptions, tags, playlists and watch/save/hide state are private.
  • Cheap by design. Public reads are cached locally; a shared daily quota budget and a background scheduler keep unattended syncing within YouTube's free API limits. An optional API key lets backfill run without depending on a user's OAuth token.

Tech

FastAPI + PostgreSQL (SQLAlchemy, Alembic) backend; React + Vite + Tailwind + TanStack Query frontend; packaged as a single Docker image with Docker Compose.

License

GNU AGPL-3.0. You can run, study, modify and share Siftlode; if you modify it and let other people use it over a network, they are entitled to your modified source. Copyright © 2026 Siftlode contributors.

Note

This project is developed with AI assistance.

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