Public betaFree during beta

Multi-stream broadcasting,
on your machine

Pull RTMP from any encoder, mix audio across cameras, record locally, schedule automations, and broadcast to YouTube, Twitch, Kick — all at once. Cross-platform desktop. No cloud lock-in.

macOS · Windows · Linux·~150 MB·EN / RU UI
What it does

A full broadcast pipeline in one app

Six capabilities that normally require three separate tools — running natively on your laptop or studio machine.

Multiple inputs

Accept RTMP from OBS, hardware encoders, or mobile. Loop local media files. Add as many sources as your machine can handle.

A/V mixer

Pair video from one source with audio from another. Sync offset slider for lip-sync correction. No external mixer needed.

One-click recording

Capture any source or mix to MP4. Custom output folder. Full broadcast quality, no transcoding penalty.

Scheduler

Automate one-shot or recurring weekly recordings and broadcasts. Set it once, forget about it.

Multi-destination

Push the same stream to YouTube, Twitch, Kick, Restream, or any custom RTMP target — simultaneously, from one machine.

LAN preview

Flip a switch to publish a low-latency HLS feed over your local network. Scan a QR code from any phone or iPad to monitor.

Quick start

Live in four steps

From a fresh install to broadcasting on YouTube — under five minutes.

Add a source

Sources → Add source. Name it, pick RTMP ingest or local file.

Point your encoder

Copy the publish URL into OBS Stream settings. Source goes live in ~3 seconds.

Add a destination

Destinations → Add destination. Pick YouTube, Twitch, Kick. Paste your stream key.

Hit Go live

One button in the top bar. Stream pushes to every destination at once.

Public beta

Free during beta. Honest about what works.

The core pipeline — ingest, mix, record, schedule, broadcast — works end-to-end. There are rough edges, occasional crashes, and breaking changes between versions. If something fails, attach your log and open an issue. We respond within a few days.

Requirements

Runs on what you already have

Lightweight installer, modest runtime. ~512 MB idle, ~1 GB while streaming.

PlatformVersionNotes
macOS11 Big Sur+Apple Silicon (arm64) only for now. Intel build returning soon.
Windows10 / 11x64. Run the .exe; SmartScreen may warn — choose “Run anyway”.
Linuxglibc 2.31+Debian 11+, Ubuntu 20.04+, Fedora 33+, RHEL 9+. Requires libwebkit2gtk-4.1.

Disk: ~150 MB for the app · Free space scaled to your recordings.

Install

Pick your platform

Latest release on GitHub. Detailed install steps in the docs.

macOS

arm64 · Apple Silicon

Tar archive. Strip the quarantine flag once, drag to /Applications, launch.

Download
FlumixaMediaServer-macos-arm64.tar.gz

Windows

x64 · 10 / 11

Zip archive. Extract anywhere, run FlumixaMediaServer.exe. Allow through SmartScreen.

Download
FlumixaMediaServer-windows-amd64.zip

Linux

amd64 · webkit2gtk-4.1

Tar archive. Install libwebkit2gtk-4.1-0, extract, run the binary.

Download
FlumixaMediaServer-linux-amd64.tar.gz

Full install instructions on GitHub →

Roadmap

What’s coming

Early adopters shape what gets built first. Have something specific you need? Open a feature request.

Near-term

  • macOS code signing + notarization (no more xattr workaround)
  • Universal macOS binary (Intel + Apple Silicon)
  • Windows NSIS installer with Start Menu entry
  • In-app update notifier

Mid-term

  • Cloud relay tier (paid)
  • Audio-only output mode for podcast workflows
  • Stream-key health check before going live
  • VOD post-recording auto-upload
FAQ

Common questions

During public beta — yes, fully free with no limits. Eventually FMS will move to a freemium model. The free tier will retain core mixing, streaming, and recording. Pro features under consideration: cloud relay, advanced scheduling, transcoding presets, monitoring dashboard.
OBS is a single-machine production switcher with a scene composer. FMS is a media server: it ingests RTMP from upstream encoders (which can include OBS), mixes/records/schedules them, and pushes to multiple destinations. OBS handles your scene; FMS orchestrates the pipeline.
It isn’t — the binary just isn’t notarized yet. macOS quarantines anything downloaded from the internet that isn’t signed. Run xattr -dr com.apple.quarantine "/Applications/Flumixa Media Server.app" once and it launches normally. Signing is on the near-term roadmap.
A folder you choose, set in Recordings → Change folder. Default is your OS’s Videos directory. Files are written as native MP4 with full broadcast quality — no re-encoding step, so output bitrate matches input.
No hard limit. The practical cap is your upstream bandwidth — each destination gets the full encoded stream. A 6 Mbps stream to four destinations needs ~24 Mbps upload.
GitHub issues. Each report should include OS + version, FMS version (in About), repro steps, and the contents of app.log (path is in the install docs). We respond within a few days.

Try it tonight.

No account, no signup, no telemetry. Download, run, broadcast.