1:1 Call Gives A Microphone Error

[TheDarkula]

Steps to reproduce

1. Select microphone and camera in settings
2. Initiate a voice or video call
3. Be greeted with this:
   

Outcome

What did you expect?

A call to succeed.

What happened instead?

Element complains that a microphone cannot be accessed.

Also, calls do succeed with element-android between two android devices. Calls only fail with element-desktop.
Another note is that the microphone/camera do function via XMPP.

Operating system

Arch Linux

Application version

Element version: 1.11.40 Olm version: 3.2.14

How did you install the app?

Arch Extra

Homeserver

Non-Public homserver running Conduit 0.6.0

Will you send logs?

Yes

[t3chguy]

Will you send logs?
Yes

No logs have come through, try again

[TheDarkula]

@t3chguy Here you go :)

2023-09-03T15:08:42.802Z D MediaHandler getUserMediaStreamInternal() calling getUserMediaStream (streamId=736f4189-2687-4bb1-a661-d952c79b9e2d, shouldRequestAudio=true, shouldRequestVideo=true, constraints={"audio":{"deviceId":{"ideal":"8359551325d8124bcf09d58faeb16566982127651296e59d077dd4a2e14bc805"},"autoGainControl":{"ideal":true},"echoCancellation":{"ideal":true},"noiseSuppression":{"ideal":true}},"video":{"deviceId":{"ideal":"dc7343af9d9573e532f79f780946f53ebd5c952f3df15928ef028182a869cfd3"},"width":{"exact":640},"height":{"exact":360}}})
2023-09-03T15:08:42.809Z D TURN creds are valid for another 86258408 ms: not fetching new ones.
2023-09-03T15:08:42.810Z W Call 1693753722401OkdxjjubnB32Mrb8 getUserMediaFailed() failed to get user media - ending call Failed to construct 'RTCPeerConnection': ICE server parsing failed: Empty uri. (SyntaxError | 12)
2023-09-03T15:08:42.811Z E Call error: Couldn't start capturing media! Is your microphone set up and does this app have permission?: SyntaxError: Failed to construct 'RTCPeerConnection': ICE server parsing failed: Empty uri.
Error: Couldn't start capturing media! Is your microphone set up and does this app have permission?: SyntaxError: Failed to construct 'RTCPeerConnection': ICE server parsing failed: Empty uri.
    at k.getUserMediaFailed (vector://vector/webapp/bundles/0bae4ca718aadea70413/bundle.js:2:90864)
    at k.placeCall (vector://vector/webapp/bundles/0bae4ca718aadea70413/bundle.js:2:132410)
    at async k.placeVideoCall (vector://vector/webapp/bundles/0bae4ca718aadea70413/bundle.js:2:95972)
2023-09-03T15:08:42.811Z D Call state in !vbCe1buotfgnqAjW9b:matrix.domain.com changed to ended
2023-09-03T15:08:42.844Z D Removing call for room  !vbCe1buotfgnqAjW9b:matrix.domain.com
2023-09-03T15:08:42.845Z D LegacyCallHandler.play(callendAudio): beginning of function
2023-09-03T15:08:42.845Z D LegacyCallHandler.play(callendAudio): attempting to play audio at volume=1
2023-09-03T15:08:42.846Z D Call completed. Call ID: 1693753722401OkdxjjubnB32Mrb8, virtual room ID: !vbCe1buotfgnqAjW9b:matrix.domain.com, user-facing room ID: !vbCe1buotfgnqAjW9b:matrix.domain.com, direction: outbound, our Party ID: DYplDreikF, hangup party: local, hangup reason: no_user_media
2023-09-03T15:08:42.846Z D Call statistics are undefined. The call has probably failed before a peerConn was established
2023-09-03T15:08:42.846Z D Call 1693753722401OkdxjjubnB32Mrb8 stopAllMedia() running
2023-09-03T15:08:42.891Z D LegacyCallHandler.play(callendAudio): playing audio successfully
2023-09-03T15:08:49.690Z D Returning cached capabilities

[t3chguy]

Looks like your TURN server is misconfigured - SyntaxError: Failed to construct 'RTCPeerConnection': ICE server parsing failed: Empty uri.

https://spec.matrix.org/v1.8/client-server-api/#get_matrixclientv3voipturnserver

[t3chguy]

Closing as a misconfiguration
element-hq/element-web#21804 is the issue about the confusing error

[TheDarkula]

@t3chguy I am running my homeserver privately/on a LAN, so there is no need for TURN. Why does the desktop client fail while the android client succeeds?

[t3chguy]

@TheDarkula STUN may still be necessary depending on the exact specifics. matrix-org/matrix-js-sdk#3695 might fix your scenario it might not. Hopefully the VoIP team will voice in on the PR.

[TheDarkula]

@t3chguy Thank you for the information and the pull request :)

Presuming that is merged in, when will that change make its way into the desktop client?

[t3chguy]

If it merged in after an RC then up to 3 weeks later. We do an RC every 2 weeks, we release the candidate a week after it is made.

[TheDarkula]

Wonderful, I will keep track of it.
Would you like me to let you know if it works once it is in?

[t3chguy]

Sure, if it isn't fixed once the PR makes it into a release I suggest opening an issue in https://github.com/vector-im/element-web/

[t3chguy]

@TheDarkula the PR got approved and will be merged later today, in time for today's RC so it should be in release in 7 days.

[TheDarkula]

Will do :)

Wonderful! Thank you so much!