Functional characteristics¶

The complete function list of the Flussonic Sapsan streaming media server. Each function is described in the administrator guide (links inline).

Video ingest¶

Capture from IP cameras and media servers over RTSP (RTP/AVP/TCP interleaved) with Basic and Digest authentication — details. Codecs: H264, HEVC, VP8, MJPEG video; AAC, G.711, Opus, MPEG-4 audio; ONVIF metadata.
MPEG-TS ingest from UDP (unicast, multicast IPv4/IPv6) and over HTTP — details. Codecs: H264, HEVC, MPEG-2 video; AAC, AC3, EAC3, MPEG-2 audio; teletext, KLV, SCTE-35.
SRT ingest in listener mode with AES encryption and streamid control — details.
RTMP pull, including Adobe/FMS authentication and enhanced RTMP (HEVC) — details.
A channel from a local MP4 file (multi-track MBR) — details.
A built-in synthetic test signal generator with a machine-readable timecode in the picture — details.
Publishing: RTMP publish, SRT publish, WebRTC WHIP; air hijack protection (one publisher per stream) — details.
Source failover with automatic no-black-screen switching (LSI), a fallback file, input control via external flag files — details.
Multibitrate stream assembly from several sources — details.
ONVIF camera discovery, motion/detection event ingest, camera compliance checks — details.

FFmpeg-based transcoding: H264/HEVC/AV1 video, AAC/Opus audio, a multibitrate ladder with aligned keyframes, resizing (scale/fit/crop), GOP control — details.
Periodic JPEG screenshots of a stream (from a video track or a camera snapshot URL) stored into the archive — details.

HLS and LL-HLS (fMP4/CMAF, protocol v9): partial segments, blocking reload, playlist delta updates — details.
MPEG-DASH (live and archive), multibitrate in one AdaptationSet — details.
MPEG-TS over HTTP, including strict CBR with correct PCR and HRD handling — details.
SRT output with encryption — details.
An RTSP server (H264/HEVC/AAC) — details.
WebRTC WHEP with minimal latency — details.
Restreaming: push over RTMP (including HEVC/AV1), SRT, UDP multicast — details.

Recording into its own append-only storage across several disks with automatic balancing — details.
Retention policies by depth and size, protected episodes, automatic disk overflow protection.
Self-healing of the archive catalog after failures and disk moves.
Archive playback over HLS/DASH: rewind with seamless stitching to live, access by absolute time — details.
Seamless playback of archives recorded on other servers, with lazy replication — details.

Single-YAML-file configuration with validation and hot reload without interrupting streaming — details.
Configuration management from an external server (Flussonic Central) with fail-safe application — details.
Playback and publish authorization: static tokens, external HTTP backends, session accounting — details.
An Admin API (Flussonic API v3 compatible plus native v4) — details.
Compatibility with Flussonic Media Server URL schemes — details.
The Peeklio gateway for reaching cameras behind NAT via agents — details.
Licensing with signed license files — details.