mpv has never decoded a video frame in this app: the backend sets `video: no` unconditionally, because Linux video has always been the webview's job and decoding it twice would burn a core for a picture nobody sees. The render path built in the previous commit therefore had nothing to draw. With native video on, mpv is configured for video *and* `vo=libmpv` — the render API only works through that output, and the default would try to open a window of its own. Set at construction, because mpv resolves its video output when it initialises and flipping the property later does not re-open one. The flag lives in `player::native_video`, read by all three things that must agree: the backend (configured before anything plays), the surface (nothing to draw otherwise), and `get_player_status` (which tells the frontend whether to use a `<video>` element — two decoders on one stream would fight over the audio). A function rather than three `env::var` checks, because a capability answered in several places is a capability whose answers drift: four separate bugs this cycle came from exactly that shape. Also fixes an ordering bug the first run exposed. The surface was attached in `setup` before the player backend was constructed, and the mpv handle is registered *during* that construction — so it found nothing every time and logged "no mpv handle". Attaching after the backend exists is the whole fix. Confirmed on a real run: mpv accepts `vo=libmpv`, the GL context comes up on Tauri's vbox, and `mpv_render_context_create` succeeds — which also proves the libepoxy data-symbol handling is right, since a wrong `get_proc_address` would have taken SIGSEGV on the first GL call rather than returning cleanly. No frame has reached the screen yet. The webview is still opaque, so it will paint over anything drawn beneath it until transparency is set up. Security: quick-xml 0.38.4 carried RUSTSEC-2026-0194 (quadratic parse on duplicate attribute names) and RUSTSEC-2026-0195 (unbounded namespace allocation, memory-exhaustion DoS). `cargo deny` gates CI on advisories, so this would have failed the next release. Fixed by plist 1.8 -> 1.10, which pulls quick-xml 0.41. Licences, bans and sources still pass. UT-216 pins the flag's parsing: absent, empty, `0`, `no` and anything unrecognised all mean off. A half-set variable that half-enabled the renderer would configure mpv for video with nothing drawing it — audio over a black rectangle. Also removes a wall-clock timer from the waitForRepository late-arrival test, which failed once under load. The assertion is about ordering, so it now publishes on a microtask and cannot race.

JellyTau
A cross-platform Jellyfin client built with Tauri, SvelteKit, and TypeScript.
Business logic lives in a Rust backend; a UI-rich Svelte frontend handles presentation and talks to it over Tauri's IPC. Targets Linux (libmpv) and Android (ExoPlayer).
Getting Started
This project uses bun as its package manager.
# Activate the Rust environment (fish shell)
source "$HOME/.cargo/env.fish"
# Install dependencies
bun install
# Run in development
bun run tauri dev
# Type-check the frontend
bun run check
# Build for Linux
bun run tauri build
# Build for Android
bun run tauri android build
For the full set of build, test, and Android helper scripts, see scripts/README.md.
Documentation
| Topic | Location |
|---|---|
| Architecture overview & subsystem docs | docs/architecture/ |
| Requirements, traceability & technical debt | docs/requirements.md |
| Build & release process | docs/build/build-release.md |
| Docker builds | docs/build/docker.md |
| Traceability tooling & CI | docs/traceability.md, docs/traceability-ci.md |
| Release checklist | docs/release-checklist.md |
| UX flows | docs/ux-flows.md |
| CI operations (builder image, secrets, runner) | docs/build/ci-operations.md |
Contributing
CONTRIBUTING.md covers the setup, the gates a change has to pass, and the two rules that catch people out (bug fixes start with a failing test; Jellyfin's taxonomy stays in Rust). Please also read the Code of Conduct.
Found a security problem? Do not open an issue — see SECURITY.md.
Verifying a download
Every release publishes SHA256SUMS covering all of its artifacts, plus an SBOM
of what went into the build:
sha256sum -c SHA256SUMS
Desktop builds update themselves from Settings → Updates, verifying each payload against JellyTau's signing key before installing. Android installs are handled by the system installer, so the app links to the releases page instead.
Recommended IDE Setup
VS Code + Svelte + Tauri + rust-analyzer.
License
MIT