No audio/video in Element X call #1306

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opened 2026-01-22 02:47:46 +00:00 by yarostepdev · 0 comments

yarostepdev commented

2026-01-22 02:47:46 +00:00

The issue description points to missing video, as it is more obvious immediately, but audio is also missing in the same way.

Self-hosted Matrix server setup:
Continuwuity, LiveKit, LiveKit-wjt, Element web and element call.
Test case: call between two clients, at least one of them uses Element X. Minimal setup is to create a room, not invite anybody and start video call in it.

Expected functionality (for simplified single user room call) - call starts and shows video from camera in it. It works for Element X with room at matrix.org (presumably uses Synapse) and it works for self-hosted setup when using element call web client.

When using Element X android client in a room hosted by Continuwuity server, picture from camera is only displayed in preview (join call button) but after joining there is empty screen.

Mention of issue specific to Element X client: 763#issuecomment-22001

Additional symptoms. Not sure if these are connected:
When other client calls me (I am using Element X) and I have the chat open there is no button to answer the call, only a message appears in the chat that call started.

LiveKit-jwt logs on start of single user room call from Element X (redacted)

Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Request from <reverse proxy ip>:44042 at "https://appassets.androidplatform.net"
Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Request from <reverse proxy ip>:44056 at "https://appassets.androidplatform.net"
Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Processing legacy SFU request
Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Got Matrix user info for @test_user_1:<my private server> (full access)
Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Created LiveKit room sid: RM_...Nz (alias: 9y...RY) for full-access Matrix user @test_user_1:<my private server> (LiveKit identity: @test_user_1:<my private server>:JU...Do

LiveKit SFU logs on start of single user room call from Element X (redacted)

Jan 22 02:23:40 matrix livekit-server[11686]: 2026-01-22T02:23:40.154Z        INFO        livekit.api        service/twirp.go:145        API RoomService.CreateRoom        {"service": "RoomService", "method": "CreateRoom", "room": "9y...RY", "request": {"name": "9y...RY", "emptyTimeout": 300, "departureTimeout": 20}, "duration": "307.688µs", "status": "200"}
# Silence until room is deleted

Redacted example of the same test case but successfully performed when using element call web client on the same private server (for comparison)

Jan 22 02:37:52 matrix livekit-server[11686]: 2026-01-22T02:37:52.359Z        INFO        livekit
.api        service/twirp.go:145        API RoomService.CreateRoom        {"service": "RoomServic
e", "method": "CreateRoom", "room": "5Y...LA", "request": {"n
ame": "5Y...LA", "emptyTimeout": 300, "departureTimeout": 20}
, "duration": "375.401µs", "status": "200"}
Jan 22 02:37:52 matrix livekit-server[11686]: 2026-01-22T02:37:52.373Z        INFO        livekit
        service/roommanager.go:413        starting RTC session        {"room": "5Y...LA", "roomID": "RM_...rf", "participant": ...
# And to be continued with many logs.

The issue description points to missing video, as it is more obvious immediately, but audio is also missing in the same way. Self-hosted Matrix server setup: Continuwuity, LiveKit, LiveKit-wjt, Element web and element call. Test case: call between two clients, at least one of them uses Element X. Minimal setup is to create a room, not invite anybody and start video call in it. Expected functionality (for simplified single user room call) - call starts and shows video from camera in it. It works for Element X with room at matrix.org (presumably uses Synapse) and it works for self-hosted setup when using element call web client. When using Element X android client in a room hosted by Continuwuity server, picture from camera is only displayed in preview (join call button) but after joining there is empty screen. ![image](/attachments/ab7b809c-b55a-4d27-9bf3-fcfa2466278f) Mention of issue specific to Element X client: [763#issuecomment-22001](https://forgejo.ellis.link/continuwuation/continuwuity/issues/763#issuecomment-22001) Additional symptoms. Not sure if these are connected: When other client calls me (I am using Element X) and I have the chat open there is no button to answer the call, only a message appears in the chat that call started. ![image](/attachments/4426f49b-8e7d-4237-8933-824f5df116b3) **LiveKit-jwt logs on start of single user room call from Element X (redacted)** ``` Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Request from <reverse proxy ip>:44042 at "https://appassets.androidplatform.net" Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Request from <reverse proxy ip>:44056 at "https://appassets.androidplatform.net" Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Processing legacy SFU request Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Got Matrix user info for @test_user_1:<my private server> (full access) Jan 22 02:23:40 matrix lk-jwt-service_linux_amd64[11692]: 2026/01/22 02:23:40 Created LiveKit room sid: RM_...Nz (alias: 9y...RY) for full-access Matrix user @test_user_1:<my private server> (LiveKit identity: @test_user_1:<my private server>:JU...Do ``` **LiveKit SFU logs on start of single user room call from Element X (redacted)** ``` Jan 22 02:23:40 matrix livekit-server[11686]: 2026-01-22T02:23:40.154Z INFO livekit.api service/twirp.go:145 API RoomService.CreateRoom {"service": "RoomService", "method": "CreateRoom", "room": "9y...RY", "request": {"name": "9y...RY", "emptyTimeout": 300, "departureTimeout": 20}, "duration": "307.688µs", "status": "200"} # Silence until room is deleted ``` **Redacted example of the same test case but successfully performed when using element call web client on the same private server (for comparison)** ``` Jan 22 02:37:52 matrix livekit-server[11686]: 2026-01-22T02:37:52.359Z INFO livekit .api service/twirp.go:145 API RoomService.CreateRoom {"service": "RoomServic e", "method": "CreateRoom", "room": "5Y...LA", "request": {"n ame": "5Y...LA", "emptyTimeout": 300, "departureTimeout": 20} , "duration": "375.401µs", "status": "200"} Jan 22 02:37:52 matrix livekit-server[11686]: 2026-01-22T02:37:52.373Z INFO livekit service/roommanager.go:413 starting RTC session {"room": "5Y...LA", "roomID": "RM_...rf", "participant": ... # And to be continued with many logs. ```

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