The new Flussonic streaming core

Sapsan. A fantastically fast streaming core

Records 10,000 cameras on one server. Delivers 100 gigabits of video.

Sapsan is a next-generation video ingest, recording, and delivery core written in Rust. It already powers Flussonic products — and it is ready to become the heart of yours.

Documentation
10,000
cameras recorded to the archive on a single server
100
gigabits of video delivered from a single server
Rust
predictable speed with no garbage collector pauses

What Sapsan is

Sapsan is a streaming core: the software component that ingests live video over industry protocols, fails over between backup sources with no black screen, transcodes, writes an append-only archive across dozens of disks, and delivers live and archived video to viewers.

The core is written in Rust from scratch — no legacy code and no performance compromises. One process, all protocols, hot configuration reload without interrupting streaming.

Ingest

RTSP, MPEG-TS (UDP/HTTP), SRT, RTMP, WebRTC WHIP, ONVIF

Archive

append-only DVR across dozens of disks, rewind, seamless archive from other servers

Delivery

HLS and LL-HLS, DASH, MPEG-TS (CBR), SRT, RTSP, WebRTC WHEP

Already inside Flussonic products

Sapsan ships bundled with Flussonic's flagship products and does all the streaming work under their hood.

Watcher

video surveillance: from 50 to 500,000 cameras

Agora

enterprise TV and private broadcasts

Mcaster

broadcasting: TV signal preparation and contribution

Building your own product?

If you are building your own VMS, IPTV platform, or video service and need a streaming core, we offer Sapsan under separate terms: core licensing for embedding into your product.

  • API-driven: the core obeys your orchestrator
  • Single-YAML configuration applied on the fly
  • Prometheus metrics and OpenTelemetry traces out of the box

Documentation

The complete administrator guide: installation, ingest, transcoding, DVR, API.

Open the Sapsan documentation