Error when do a `changeroom` in `AudioBridge` plugin

[NormandoHall]

Hello.

Is it possible that when I perform a changeroom in Janode, I'm getting the following error? This is the log with --janode-log=debug flag:

2026-08-14T04:40:41.403Z - VERBOSE : [tmanager.js] [1643482266961540] created new transaction 3166133045113532, request "message"
2026-08-14T04:40:41.404Z - DEBUG   : [transport-ws.js] [3166133045113506] <ws SND OK> {"janus":"message","body":{"request":"changeroom","room":"Dev-1001","muted":true,"pin":"6d199cc4-1429-4e9a-95e9-12e421317030"},"transaction":"3166133045113532","handle_id":1643482266961540,"session_id":1731845264103649,"apisecret":"xxxxxxxx"}
2026-08-14T04:40:41.406Z - DEBUG   : [transport-ws.js] [3166133045113506] <ws RCV OK> {
   "janus": "ack",
   "session_id": 1731845264103649,
   "transaction": "3166133045113532"
}
2026-08-14T04:40:41.406Z - VERBOSE : [handle.js] [1643482266961540] received ack for transaction 3166133045113532
2026-08-14T04:40:41.406Z - DEBUG   : [transport-ws.js] [3166133045113506] <ws RCV OK> {
   "janus": "event",
   "session_id": 1731845264103649,
   "transaction": "3166133045113532",
   "sender": 1643482266961540,
   "plugindata": {
      "plugin": "janus.plugin.audiobridge",
      "data": {
         "audiobridge": "roomchanged",
         "room": "Dev-1001",
         "id": "c37975b2-e62f-4973-b6df-74a74fc1e7de",
         "participants": []
      }
   }
}
2026-08-14T04:40:41.406Z - VERBOSE : [handle.js] [1643482266961540] received event for transaction 3166133045113532
2026-08-14T04:40:41.406Z - WARNING : [handle.js] [1643482266961540] received event could not be handled by the plugin
2026-08-14T04:40:41.406Z - VERBOSE : [tmanager.js] [1643482266961540] closed with error transaction 3166133045113532, request "message"

Looking at the Janode src, it seems it's not recognizing the roomchanged event emitted by Janus. What can I do?

I do in this way:

await handle.message({
   request  :  'changeroom',
   room     :  'Dev-1001',
   muted    :  true,
   pin      :  '6d199cc4-1429-4e9a-95e9-12e421317030'
});

Thanks!!!

[lminiero]

The AudioBridge plugin in Janode doesn't currently support the changeroom request: in fact, it looks like you're manually sending that request, which results in the plugin getting an event it's not ready for. You can add a dedicated method to the plugin to send it properly instead, which would involve handling the roomchanhed event for a successful resolution.

[NormandoHall]

Thanks Lorenzo for the reply.

What's the best way or best practice for adding the changeroom method? Should I extend the plugin in my code, like "class myOwnAudioBridge extends AudioBridge {..." or is there a better way?

Thanks for your work!

[NormandoHall]

With a little help of AI (sorry) I extended the class and added the method changeroom and listen the roomchanged event. For those who need this method, create a new file (ex. CustomAudioBridgePlugin.js) with the content:

'use strict';

const AudioBridgePlugin = require('janode/plugins/audiobridge').default;

class CustomAudioBridgeHandle extends AudioBridgePlugin.Handle {

  async changeRoom(params) {
    const body = {
      request : 'changeroom',
      ...params
    };

    const response = await this.message(body);

    const { event, data: evtdata } = this._getPluginEvent(response);

    if (event === 'audiobridge_roomchanged') {
      this.room = body.room;
      return evtdata;
    }

    throw new Error(`unexpected response to ${body.request} request`);
  }

  handleMessage(janus_message) {
    const { plugindata, transaction } = janus_message;

    if (plugindata && plugindata.data && plugindata.data.audiobridge === 'roomchanged') {
      const message_data = plugindata.data;

      const janode_event = this._newPluginEvent(janus_message);
      janode_event.event = 'audiobridge_roomchanged';
      janode_event.data = message_data;

      this.closeTransactionWithSuccess(transaction, janus_message);

      if (this.ownsTransaction(transaction) === false) {
        this.emit(janode_event.event, janode_event.data);
      }

      return janode_event;
    }

    return super.handleMessage(janus_message);
  }
}

const CustomAudioBridgePlugin = {
  ...AudioBridgePlugin,
  Handle : CustomAudioBridgeHandle
};

module.exports = CustomAudioBridgePlugin;

Remove the original require and use the new one:

// const AudioBridgePlugin = require('janode/plugins/audiobridge').default;
const AudioBridgePlugin = require('./CustomAudioBridgePlugin');

Use the method changeroom same as other AudioBridge methods:

await handle.changeRoom({
  room    : 'xxx'
  display : 'zzz
});