Every call in the web client now goes through MatrixRTC with a LiveKit
SFU, the model Element Call and Element X use; the legacy 1:1 m.call.*
calls are gone. In a room of two the other person is rung and can answer
or decline; in a bigger room a banner offers to join the call. Calls show
a grid of participant tiles with mute, camera, screen sharing and leave,
and media is end-to-end encrypted in encrypted rooms.
Server:
- MSC4140 delayed events (send/state with a delay, plus the
delayed_events list/restart/cancel/send API), stored and scheduled, so
a member whose client drops off is taken out of the call.
- POST /user/{userId}/openid/request_token, which lk-jwt-service uses to
hand out LiveKit tokens.
- org.matrix.msc4143.rtc_foci in /.well-known/matrix/client, configured
under client_api.rtc.
- Room presets let members send call membership state.
- Migration 0014 for both SQL dialects.
Deploy: LiveKit and lk-jwt-service in compose (calls.yml) and the helm
chart. Docs: docs/calls.md, configuration and deployment.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Server: GET /voip/turnServer, configured under client_api.turn. A shared
secret (coturn use-auth-secret) gives each user expiring TURN REST API
credentials; static credentials are the fallback; with nothing configured
it answers {} so clients still try a direct connection.
Web client: 1:1 calls (Matrix VoIP via matrix-js-sdk) in rooms with one
other person. Voice and video buttons in the room header, a ringing card
with answer, answer without video and decline, and a call panel that
stays up across rooms: mute, camera, screen sharing, expand, hang up,
ring tones. Call events show in the timeline and room list. Works around
the SDK keeping a failed microphone request forever.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>