Session Announcement Protocol for Multicast

Session Announcement Protocol (SAP) is a protocol to announce available Multicast streams in local networks. Clients on the network listens for announces and receives information such:

  • Stream name
  • Multicast address and port
  • TTL
  • Stream format - RTP or UDP

Astra send SAP packets to the multicast group port 9875.

Configure Astra

In the Output address append sap option to turn the SAP announcements on.

Channel Settings

Receiving SAP with VLC

Open VLC Media Player and in the Playlist select Local Network -> Network streams (SAP). VLC receives SAP announcements and list all available streams. Double click on the stream to start playing.