I just want to ask for switch active device on Room, I'm using Angular 19 right now so i have a function to change the video device like this one:

onVideoDeviceChange(deviceId: string) {
    console.log("deviceId selected: ", deviceId)
    console.log("Room before: ", this.room.getActiveDevice("videoinput"))
    this.room.switchActiveDevice('videoinput', deviceId);
    console.log("Room after: ", this.room.getActiveDevice("videoinput"))
    this.selectedVideoDeviceId = deviceId;
  }

and this is the output from console log

deviceId selected:  ['768ad2c7a53da662cfd8249a9e7e4a23dc52440d0e97d6d78e14849b22717646']
Room before:  ['730fb5a17e61062d816cf29d01f2fc48bb5054a171fb345643bfc196af8244ec']
Room after:  ['730fb5a17e61062d816cf29d01f2fc48bb5054a171fb345643bfc196af8244ec']

I dont know why the active device is not change, it should be changed based on this documentation: https://docs.livekit.io/reference/client-sdk-js/classes/Room.html#switchactivedevice

Thanks for reaching out, arahman. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

I just add RoomEvent.ActiveDeviceChanged, but im not get any callbacks from the function, it means that active device is not changed

I’m glad you reached out! When you call

switchActiveDevice

, the

RoomEvent.ActiveDeviceChanged

event should indeed trigger, but there are a few important things to keep in mind: • First, make sure the

deviceId

you’re using is valid and available by checking

Room.getLocalDevices('videoinput')

. • Also, double-check that your event listener is properly attached before you call

switchActiveDevice

. • It’s good to verify whether the video track is published and not muted, because if no track is published, the event might not fire right away. • Lastly, consider the browser and platform you’re on—some, like Safari or iOS, have limitations around device switching. One more tip: take a look at the return value of

switchActiveDevice

to confirm the operation was successful. If you’re still running into trouble, enabling debug logging can be really helpful to see if the

activeDeviceMap

updates and if the event is being emitted internally. I hope this helps you move forward smoothly! Sources: packages/core/src/components/mediaDeviceSelect.ts | examples/demo/demo.ts

async updateDeviceList() {
    this.videoInputs = await Room.getLocalDevices('videoinput');
    if (!this.selectedVideoDeviceId && this.videoInputs.length > 0) {
      this.selectedVideoDeviceId = this.videoInputs[0].deviceId;
      this.room.switchActiveDevice('videoinput', this.selectedVideoDeviceId);
    }

    this.audioInputs = await Room.getLocalDevices('audioinput');
    if (!this.selectedAudioInputDeviceId && this.audioInputs.length > 0) {
      this.selectedAudioInputDeviceId = this.audioInputs[0].deviceId;
      this.room.switchActiveDevice('audioinput', this.selectedAudioInputDeviceId);
    }

    this.audioOutputs = await Room.getLocalDevices('audiooutput');

    if (!this.selectedAudioOutputDeviceId && this.audioOutputs.length > 0) {
      this.selectedAudioOutputDeviceId = this.audioOutputs[0].deviceId;
      this.room.switchActiveDevice('audiooutput', this.selectedAudioOutputDeviceId);
    }
  }

I pretty sure the device list and selected device id are valid, because i get the list from Room.getLocalDevices('videoinput')

this.room.on(RoomEvent.ActiveDeviceChanged, this.onDeviceChangedEvent);

and also this event listener is attached before i called room.switchActiveDevice

Hi there! I wanted to share some helpful info about the

RoomEvent.ActiveDeviceChanged

event. Sometimes, it might not trigger if the requested

deviceId

is already active or if there are active tracks of the same kind in the room. Let’s walk through some steps to check and troubleshoot this together: • Try using

room.getActiveDevice('videoinput')

before calling

switchActiveDevice

to see which device is currently active. If the

deviceId

you want matches the current one, the event won’t fire because there’s no change happening. • Take a look at the return value of

switchActiveDevice

. If it doesn’t succeed, the event won’t be emitted, so this is a good indicator. • Make sure the video track isn’t actively published or muted. If a track is active, that might delay the event from triggering right away. • Also, double-check that your SDK version is at least v1.11.2, since earlier versions might not reliably emit this event. If you’re still having trouble, a helpful tip is to listen for

RoomEvent.LocalTrackPublished

as well, since it can signal when tracks get updated with new devices. Sources: CHANGELOG.md