WebRTC playback (WHEP)¶

For minimal-latency playback Sapsan serves streams over WebRTC via the standard WHEP protocol.

Configuration¶

WebRTC needs a UDP port on the server:

listeners:
  webrtc:
    - port: 5005

Playback URL¶

The stream's WHEP endpoint:

http://server/streaming/whep/<stream>

Any WHEP-compatible player works.

Requirements and behavior¶

• The stream must have an H264 video track; Opus audio is optional. A stream with another video codec is not served over WHEP (re-encode with the transcoder). Streams with G.711 audio also go through the transcoder to Opus.
• The server answers PLI/NACK (a fresh keyframe on player request) and paces packet output instead of flooding the client.
• WebRTC uses the fixed UDP port set from listeners.webrtc — easy to open on a firewall; the server's external address is detected automatically.

Next steps¶

• Accept WHIP publishing