dtourolle dda2ff86a3 feat(player): cap streaming bandwidth with a user-chosen bitrate ceiling
Video streams were opened at a fixed allowance nobody could change:
MaxStreamingBitrate=20000000/VideoBitrate=18000000 on the HLS transcode
URL, 20 Mbps in the PlaybackInfo negotiation, and a 999999999 device
profile that let the server direct-play a source of any size. On a
metered or slow connection there was no way to spend less.

StreamingQuality is a ladder of bandwidth ceilings — Original, 20/10/8/
4/2/1 Mbps and 720 kbps — where a step bundles the total ceiling, the
audio share of it and the resolution that budget can carry. Those
numbers are Jellyfin encoding vocabulary, so they live in Rust and the
frontend only names a variant; labels and details come back over IPC
from player_get_streaming_qualities, the same arrangement as the EQ
presets.

The cap has to reach the *negotiation*, not just the transcode URL:
max_static_bitrate in the device profile is what makes the server refuse
to direct-play a file fatter than the cap, and without it a 30 Mbps
remux is handed over untouched and every URL parameter downstream is
moot. So it is applied at all four places that decide bandwidth — the
HLS URL builder, PlaybackInfo, the Live TV stream, and the
background-audio handoff (which takes the lower of the cap and its own
384 kbps). Video bitrate is the total minus the audio share so the two
together honour the ceiling rather than overshooting it.

The ceiling is process-wide rather than a repository field: it is a
preference about this device's connection, must survive a repository
rebuilt on re-login, and every URL builder plus the negotiation have to
agree on it or the cap leaks. Same shape as INCLUDE_CATALOG_BROWSE.

Two ways in. Settings holds the durable default, persisted to
app_settings and restored at startup — unlike the rest of VideoSettings,
because a limit set for a metered connection that silently reverts to
uncapped on the next launch spends the user's data with no changed
setting to see. The in-player menu is the "this film, this connection"
override: a cap is a property of the stream the server is producing, so
it cannot apply to one already in flight — player_set_stream_quality
re-opens the stream at the new quality and resumes at the current
position, reloading the native backend itself and handing HTML5 a URL
for the same reloadSource primitive the audio-track switch uses.

Tests pin the URL parameters at a capped and an uncapped step, the
handoff taking the lower of the two, the ladder's internal consistency
(video + audio == cap, resolution descending with bitrate) and the
persisted token's round trip. The ceiling is process-wide, so the tests
that depend on it serialise on a guard that restores the default.

TRACES: UR-074 | DR-160 | UT-156, UT-157
2026-08-15 16:34:56 +02:00
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2026-06-27 17:43:08 +02:00
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2026-01-26 22:21:54 +01:00

JellyTau logo
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-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

VS Code + Svelte + Tauri + rust-analyzer.

License

MIT

S
Description
A jellyfin client with Tauri
Readme MIT
93 MiB
2026-08-22 08:10:12 +00:00
Languages
Rust 50.7%
TypeScript 25.8%
Svelte 16.4%
Kotlin 4.8%
Shell 1.7%
Other 0.5%