element-web/docs/jitsi.md

Jitsi in Riot

Riot uses Jitsi for conference calls, which provides options for self-hosting your own server and supports most major platforms.

1:1 calls, or calls between you and one other person, do not use Jitsi. Instead, those calls work directly between clients or via TURN servers configured on the respective homeservers.

There's a number of ways to start a Jitsi call: the easiest way is to click on the voice or video buttons near the message composer in a room with more than 2 people. This will add a Jitsi widget which allows anyone in the room to join.

Integration managers (available through the 4 squares in the top right of the room) may provide their own approaches for adding Jitsi widgets.

Configuring Riot to use your self-hosted Jitsi server

Riot will use the Jitsi server that is embedded in the widget, even if it is not the one you configured. This is because conference calls must be held on a single Jitsi server and cannot be split over multiple servers.

However, you can configure Riot to start a conference with your Jitsi server by adding to your config the following:

{
  "jitsi": {
    "preferredDomain": "your.jitsi.example.org"
  }
}

The default is jitsi.riot.im (a free service offered by Riot), and the demo site for Jitsi uses meet.jit.si (also free).

Once you've applied the config change, refresh Riot and press the call button. This should start a new conference on your Jitsi server.

Note: The widget URL will point to a jitsi.html page hosted by Riot. The Jitsi domain will appear later in the URL as a configuration parameter.

Hint: If you want everyone on your homeserver to use the same Jitsi server by default, set the following on your homeserver's /.well-known/matrix/client config:

{
  "im.vector.riot.jitsi": {
    "preferredDomain": "your.jitsi.example.org"
  }
}

Mobile app support

Currently the Riot mobile apps do not support custom Jitsi servers and will instead use the default jitsi.riot.im server. When users on the mobile apps join the call, they will be joining a different conference which has the same name, but not the same participants. This is a known bug and which needs to be fixed.