Ensure group audio-only calls don't switch on the webcam on join (#20234)

Pass isAudioOnly flag to jitsi SDK

Author: novocaine

src/vector/jitsi/index.ts

@@ -46,6 +46,7 @@ let jitsiAuth: string;
 let roomId: string;
 let openIdToken: IOpenIDCredentials;
 let roomName: string;
+let startAudioOnly: boolean;
 
 let widgetApi: WidgetApi;
 let meetApi: any; // JitsiMeetExternalAPI
@@ -107,6 +108,7 @@ let meetApi: any; // JitsiMeetExternalAPI
  jitsiAuth = qsParam('auth', true);
  roomId = qsParam('roomId', true);
  roomName = qsParam('roomName', true);
+ startAudioOnly = qsParam('isAudioOnly', true) === "true";
 
  if (widgetApi) {
  await readyPromise;
@@ -238,6 +240,9 @@ function joinConference() { // event handler bound in HTML
  MAIN_TOOLBAR_BUTTONS: [],
  VIDEO_LAYOUT_FIT: "height",
  },
+ configOverwrite: {
+ startAudioOnly,
+ },
  jwt: jwt,
  };