Video UI

Video UI

A complete set of video conferencing UI components built on @livekit/components-react and styled with shadcn/ui. Provides a room provider, participant grid, active speaker spotlight, media controls, device selection prejoin screen, and individual participant tiles.

Prerequisites

• Next.js app with src/ directory and App Router
• video-room skill installed (LiveKit server SDK, token API, types)
• add-shadcn skill installed (Button, Card components available)
• shadcn/ui components: button, card, select, avatar

Installation

bun add @livekit/components-react @livekit/components-styles
bunx shadcn@latest add button card select avatar

What Gets Created

src/
└── components/
    └── video/
        ├── video-room-provider.tsx     # LiveKitRoom wrapper, fetches token from /api/video/token
        ├── participant-grid.tsx        # Grid layout using useParticipants + useTracks
        ├── speaker-view.tsx            # Active speaker spotlight using useSpeakingParticipants
        ├── controls-bar.tsx            # Mute / camera / screen share / leave buttons
        ├── prejoin-screen.tsx          # Device selection + camera preview before joining
        └── participant-tile.tsx        # Single participant video track + name overlay + speaking indicator

Setup Steps

Step 1: Create src/components/video/video-room-provider.tsx

"use client";

import { useState, useEffect, useCallback, type ReactNode } from "react";
import { LiveKitRoom } from "@livekit/components-react";
import "@livekit/components-styles/prefabs.css";
import type { TokenResponse } from "@/lib/video/types";

type VideoRoomProviderProps = {
  roomName: string;
  participantName?: string;
  children: ReactNode;
  onConnected?: () => void;
  onDisconnected?: () => void;
  onError?: (error: Error) => void;
};

export function VideoRoomProvider({
  roomName,
  participantName,
  children,
  onConnected,
  onDisconnected,
  onError,
}: VideoRoomProviderProps) {
  const [token, setToken] = useState<string | null>(null);
  const [url, setUrl] = useState<string | null>(null);
  const [error, setError] = useState<string | null>(null);
  const [isLoading, setIsLoading] = useState(true);

  const fetchToken = useCallback(async () => {
    setIsLoading(true);
    setError(null);

    try {
      const res = await fetch("/api/video/token", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ roomName, participantName }),
      });

      if (!res.ok) {
        const body = await res.json().catch(() => ({ error: "Failed to get token" }));
        throw new Error((body as { error: string }).error);
      }

      const data: TokenResponse = await res.json();
      setToken(data.token);
      setUrl(data.url);
    } catch (err) {
      const message = err instanceof Error ? err.message : "Failed to connect";
      setError(message);
      onError?.(err instanceof Error ? err : new Error(message));
    } finally {
      setIsLoading(false);
    }
  }, [roomName, participantName, onError]);

  useEffect(() => {
    fetchToken();
  }, [fetchToken]);

  if (isLoading) {
    return (
      <div className="flex h-full items-center justify-center">
        <div className="flex items-center gap-2 text-muted-foreground">
          <div className="h-4 w-4 animate-spin rounded-full border-2 border-current border-t-transparent" />
          <span>Connecting to room...</span>
        </div>
      </div>
    );
  }

  if (error || !token || !url) {
    return (
      <div className="flex h-full items-center justify-center">
        <div className="text-center">
          <p className="text-destructive font-medium">Failed to join room</p>
          <p className="text-muted-foreground text-sm mt-1">{error ?? "Unknown error"}</p>
          <button
            type="button"
           
            className="mt-4 rounded-md bg-primary px-4 py-2 text-sm text-primary-foreground hover:bg-primary/90"
          >
            Retry
          </button>
        </div>
      </div>
    );
  }

  return (
    <LiveKitRoom
      token={token}
      serverUrl={url}
      connect={true}
     
     
      => onError?.(err)}
      data-lk-theme="default"
      className="h-full w-full"
    >
      {children}
    </LiveKitRoom>
  );
}

Step 2: Create src/components/video/participant-tile.tsx

"use client";

import { useRef, useEffect } from "react";
import type { TrackReferenceOrPlaceholder } from "@livekit/components-react";
import { Card } from "@/components/ui/card";
import { Avatar, AvatarFallback } from "@/components/ui/avatar";

type ParticipantTileProps = {
  trackRef: TrackReferenceOrPlaceholder;
  className?: string;
};

function getInitials(name: string): string {
  return name
    .split(" ")
    .map((part) => part.charAt(0))
    .join("")
    .toUpperCase()
    .slice(0, 2);
}

export function ParticipantTile({ trackRef, className }: ParticipantTileProps) {
  const videoRef = useRef<HTMLVideoElement>(null);
  const participant = trackRef.participant;
  const publication = trackRef.publication;
  const track = publication?.track;
  const isSpeaking = participant.isSpeaking;
  const displayName = participant.name ?? participant.identity;

  useEffect(() => {
    if (!videoRef.current || !track) return;
    track.attach(videoRef.current);
    return () => {
      track.detach(videoRef.current!);
    };
  }, [track]);

  const hasVideo = track && !publication?.isMuted;

  return (
    <Card
      className={`relative overflow-hidden bg-muted ${
        isSpeaking ? "ring-2 ring-primary" : ""
      } ${className ?? ""}`}
    >
      {hasVideo ? (
        <video
          ref={videoRef}
          autoPlay
          playsInline
          muted
          className="h-full w-full object-cover"
        />
      ) : (
        <div className="flex h-full w-full items-center justify-center bg-muted">
          <Avatar className="h-16 w-16">
            <AvatarFallback className="text-lg">
              {getInitials(displayName)}
            </AvatarFallback>
          </Avatar>
        </div>
      )}

      {/* Name overlay */}
      <div className="absolute bottom-0 left-0 right-0 bg-black/50 px-3 py-1.5">
        <div className="flex items-center gap-2">
          {isSpeaking && (
            <span className="h-2 w-2 shrink-0 rounded-full bg-green-400 animate-pulse" />
          )}
          <span className="truncate text-sm font-medium text-white">
            {displayName}
          </span>
        </div>
      </div>
    </Card>
  );
}

Step 3: Create src/components/video/participant-grid.tsx

"use client";

import { useId } from "react";
import { useTracks } from "@livekit/components-react";
import { Track } from "livekit-client";
import { ParticipantTile } from "@/components/video/participant-tile";

type ParticipantGridProps = {
  className?: string;
};

function getGridCols(count: number): string {
  if (count <= 1) return "grid-cols-1";
  if (count <= 4) return "grid-cols-2";
  if (count <= 9) return "grid-cols-3";
  return "grid-cols-4";
}

export function ParticipantGrid({ className }: ParticipantGridProps) {
  const gridId = useId();

  const trackRefs = useTracks(
    [
      { source: Track.Source.Camera, withPlaceholder: true },
      { source: Track.Source.ScreenShare, withPlaceholder: false },
    ],
    { onlySubscribed: false }
  );

  if (trackRefs.length === 0) {
    return (
      <div className="flex h-full items-center justify-center text-muted-foreground">
        <p>Waiting for participants...</p>
      </div>
    );
  }

  const gridCols = getGridCols(trackRefs.length);

  return (
    <div
      className={`grid gap-2 p-2 ${gridCols} auto-rows-fr ${className ?? ""}`}
    >
      {trackRefs.map((trackRef) => (
        <ParticipantTile
          key={`${gridId}-${trackRef.participant.sid}-${trackRef.source}`}
          trackRef={trackRef}
          className="aspect-video"
        />
      ))}
    </div>
  );
}

Step 4: Create src/components/video/speaker-view.tsx

"use client";

import { useId } from "react";
import { useTracks } from "@livekit/components-react";
import { Track } from "livekit-client";
import { ParticipantTile } from "@/components/video/participant-tile";

type SpeakerViewProps = {
  className?: string;
};

export function SpeakerView({ className }: SpeakerViewProps) {
  const speakerId = useId();

  const trackRefs = useTracks(
    [{ source: Track.Source.Camera, withPlaceholder: true }],
    { onlySubscribed: false }
  );

  if (trackRefs.length === 0) {
    return (
      <div className="flex h-full items-center justify-center text-muted-foreground">
        <p>Waiting for participants...</p>
      </div>
    );
  }

  // Sort so that speaking participants appear first
  const sorted = [...trackRefs].sort((a, b) => {
    if (a.participant.isSpeaking && !b.participant.isSpeaking) return -1;
    if (!a.participant.isSpeaking && b.participant.isSpeaking) return 1;
    return 0;
  });

  const activeSpeaker = sorted[0];
  const others = sorted.slice(1);

  return (
    <div className={`flex h-full flex-col gap-2 p-2 ${className ?? ""}`}>
      {/* Active speaker spotlight */}
      <div className="flex-1 min-h-0">
        <ParticipantTile
          key={`${speakerId}-spotlight-${activeSpeaker.participant.sid}`}
          trackRef={activeSpeaker}
          className="h-full w-full"
        />
      </div>

      {/* Thumbnail strip */}
      {others.length > 0 && (
        <div className="flex h-28 shrink-0 gap-2 overflow-x-auto">
          {others.map((trackRef) => (
            <ParticipantTile
              key={`${speakerId}-thumb-${trackRef.participant.sid}`}
              trackRef={trackRef}
              className="aspect-video h-full w-auto shrink-0"
            />
          ))}
        </div>
      )}
    </div>
  );
}

Step 5: Create src/components/video/controls-bar.tsx

"use client";

import {
  useLocalParticipant,
  useRoomContext,
} from "@livekit/components-react";
import { Track } from "livekit-client";
import { Button } from "@/components/ui/button";

type ControlsBarProps = {
  onLeave?: () => void;
  className?: string;
  showScreenShare?: boolean;
};

export function ControlsBar({
  onLeave,
  className,
  showScreenShare = true,
}: ControlsBarProps) {
  const { localParticipant } = useLocalParticipant();
  const room = useRoomContext();

  const isMicEnabled = localParticipant.isMicrophoneEnabled;
  const isCameraEnabled = localParticipant.isCameraEnabled;
  const isScreenShareEnabled = localParticipant.isScreenShareEnabled;

  const handleToggleMic = async () => {
    await localParticipant.setMicrophoneEnabled(!isMicEnabled);
  };

  const handleToggleCamera = async () => {
    await localParticipant.setCameraEnabled(!isCameraEnabled);
  };

  const handleToggleScreenShare = async () => {
    await localParticipant.setScreenShareEnabled(!isScreenShareEnabled);
  };

  const handleLeave = () => {
    room.disconnect();
    onLeave?.();
  };

  return (
    <div
      className={`flex items-center justify-center gap-3 border-t bg-background px-4 py-3 ${className ?? ""}`}
    >
      {/* Microphone toggle */}
      <Button
        variant={isMicEnabled ? "secondary" : "destructive"}
        size="sm"
       
        title={isMicEnabled ? "Mute microphone" : "Unmute microphone"}
      >
        {isMicEnabled ? (
          <MicOnIcon className="mr-2 h-4 w-4" />
        ) : (
          <MicOffIcon className="mr-2 h-4 w-4" />
        )}
        {isMicEnabled ? "Mute" : "Unmute"}
      </Button>

      {/* Camera toggle */}
      <Button
        variant={isCameraEnabled ? "secondary" : "destructive"}
        size="sm"
       
        title={isCameraEnabled ? "Turn off camera" : "Turn on camera"}
      >
        {isCameraEnabled ? (
          <CameraOnIcon className="mr-2 h-4 w-4" />
        ) : (
          <CameraOffIcon className="mr-2 h-4 w-4" />
        )}
        {isCameraEnabled ? "Camera Off" : "Camera On"}
      </Button>

      {/* Screen share toggle */}
      {showScreenShare && (
        <Button
          variant={isScreenShareEnabled ? "default" : "secondary"}
          size="sm"
         
          title={isScreenShareEnabled ? "Stop sharing" : "Share screen"}
        >
          <ScreenShareIcon className="mr-2 h-4 w-4" />
          {isScreenShareEnabled ? "Stop Share" : "Share Screen"}
        </Button>
      )}

      {/* Leave button */}
      <Button
        variant="destructive"
        size="sm"
       
        title="Leave room"
      >
        <LeaveIcon className="mr-2 h-4 w-4" />
        Leave
      </Button>
    </div>
  );
}

// --- Inline SVG icons (no external dependency needed) ---

function MicOnIcon({ className }: { className?: string }) {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2} strokeLinecap="round" strokeLinejoin="round" className={className}>
      <path d="M12 2a3 3 0 0 0-3 3v7a3 3 0 0 0 6 0V5a3 3 0 0 0-3-3Z" />
      <path d="M19 10v2a7 7 0 0 1-14 0v-2" />
      <line x1="12" x2="12" y1="19" y2="22" />
    </svg>
  );
}

function MicOffIcon({ className }: { className?: string }) {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2} strokeLinecap="round" strokeLinejoin="round" className={className}>
      <line x1="2" x2="22" y1="2" y2="22" />
      <path d="M18.89 13.23A7.12 7.12 0 0 0 19 12v-2" />
      <path d="M5 10v2a7 7 0 0 0 12 5.29" />
      <path d="M15 9.34V5a3 3 0 0 0-5.68-1.33" />
      <path d="M9 9v3a3 3 0 0 0 5.12 2.12" />
      <line x1="12" x2="12" y1="19" y2="22" />
    </svg>
  );
}

function CameraOnIcon({ className }: { className?: string }) {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2} strokeLinecap="round" strokeLinejoin="round" className={className}>
      <path d="m16 13 5.223 3.482a.5.5 0 0 0 .777-.416V7.87a.5.5 0 0 0-.752-.432L16 10.5" />
      <rect x="2" y="6" width="14" height="12" rx="2" />
    </svg>
  );
}

function CameraOffIcon({ className }: { className?: string }) {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2} strokeLinecap="round" strokeLinejoin="round" className={className}>
      <line x1="2" x2="22" y1="2" y2="22" />
      <path d="M21 17.09V7.87a.5.5 0 0 0-.752-.432L16 10.5" />
      <path d="M14 14.24V18a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h1.05" />
    </svg>
  );
}

function ScreenShareIcon({ className }: { className?: string }) {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2} strokeLinecap="round" strokeLinejoin="round" className={className}>
      <path d="M13 3H4a2 2 0 0 0-2 2v10a2 2 0 0 0 2 2h16a2 2 0 0 0 2-2v-3" />
      <path d="M8 21h8" />
      <path d="M12 17v4" />
      <path d="m17 8 5-5" />
      <path d="M17 3h5v5" />
    </svg>
  );
}

function LeaveIcon({ className }: { className?: string }) {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth={2} strokeLinecap="round" strokeLinejoin="round" className={className}>
      <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4" />
      <polyline points="16 17 21 12 16 7" />
      <line x1="21" x2="9" y1="12" y2="12" />
    </svg>
  );
}

Step 6: Create src/components/video/prejoin-screen.tsx

"use client";

import { useState, useRef, useEffect, useCallback, useId } from "react";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "@/components/ui/card";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";

type PrejoinScreenProps = {
  roomName: string;
  onJoin: (settings: JoinSettings) => void;
  className?: string;
};

type JoinSettings = {
  audioDeviceId: string | undefined;
  videoDeviceId: string | undefined;
  audioEnabled: boolean;
  videoEnabled: boolean;
};

type MediaDeviceOption = {
  deviceId: string;
  label: string;
};

export function PrejoinScreen({ roomName, onJoin, className }: PrejoinScreenProps) {
  const audioSelectId = useId();
  const videoSelectId = useId();
  const videoRef = useRef<HTMLVideoElement>(null);
  const streamRef = useRef<MediaStream | null>(null);

  const [audioDevices, setAudioDevices] = useState<MediaDeviceOption[]>([]);
  const [videoDevices, setVideoDevices] = useState<MediaDeviceOption[]>([]);
  const [selectedAudioId, setSelectedAudioId] = useState<string | undefined>(undefined);
  const [selectedVideoId, setSelectedVideoId] = useState<string | undefined>(undefined);
  const [audioEnabled, setAudioEnabled] = useState(true);
  const [videoEnabled, setVideoEnabled] = useState(true);
  const [isLoadingDevices, setIsLoadingDevices] = useState(true);

  const enumerateDevices = useCallback(async () => {
    setIsLoadingDevices(true);
    try {
      // Request permissions first so device labels are available
      const stream = await navigator.mediaDevices.getUserMedia({
        audio: true,
        video: true,
      });

      const devices = await navigator.mediaDevices.enumerateDevices();

      const audioInputs = devices
        .filter((d) => d.kind === "audioinput" && d.deviceId)
        .map((d) => ({ deviceId: d.deviceId, label: d.label || "Microphone" }));

      const videoInputs = devices
        .filter((d) => d.kind === "videoinput" && d.deviceId)
        .map((d) => ({ deviceId: d.deviceId, label: d.label || "Camera" }));

      setAudioDevices(audioInputs);
      setVideoDevices(videoInputs);

      if (audioInputs.length > 0 && !selectedAudioId) {
        setSelectedAudioId(audioInputs[0].deviceId);
      }
      if (videoInputs.length > 0 && !selectedVideoId) {
        setSelectedVideoId(videoInputs[0].deviceId);
      }

      // Stop the initial permission stream
      stream.getTracks().forEach((t) => t.stop());
    } catch {
      // Permissions denied or no devices
    } finally {
      setIsLoadingDevices(false);
    }
  }, [selectedAudioId, selectedVideoId]);

  // Enumerate devices on mount
  useEffect(() => {
    enumerateDevices();
  }, [enumerateDevices]);

  // Start camera preview
  useEffect(() => {
    if (!videoEnabled || !selectedVideoId) {
      if (streamRef.current) {
        streamRef.current.getTracks().forEach((t) => t.stop());
        streamRef.current = null;
      }
      return;
    }

    let cancelled = false;

    const startPreview = async () => {
      try {
        // Stop previous stream
        if (streamRef.current) {
          streamRef.current.getTracks().forEach((t) => t.stop());
        }

        const stream = await navigator.mediaDevices.getUserMedia({
          video: { deviceId: { exact: selectedVideoId } },
        });

        if (cancelled) {
          stream.getTracks().forEach((t) => t.stop());
          return;
        }

        streamRef.current = stream;
        if (videoRef.current) {
          videoRef.current.srcObject = stream;
        }
      } catch {
        // Camera unavailable
      }
    };

    startPreview();

    return () => {
      cancelled = true;
      if (streamRef.current) {
        streamRef.current.getTracks().forEach((t) => t.stop());
        streamRef.current = null;
      }
    };
  }, [videoEnabled, selectedVideoId]);

  const handleJoin = () => {
    // Stop preview stream before joining
    if (streamRef.current) {
      streamRef.current.getTracks().forEach((t) => t.stop());
      streamRef.current = null;
    }

    onJoin({
      audioDeviceId: selectedAudioId,
      videoDeviceId: selectedVideoId,
      audioEnabled,
      videoEnabled,
    });
  };

  return (
    <div className={`flex h-full items-center justify-center p-4 ${className ?? ""}`}>
      <Card className="w-full max-w-lg">
        <CardHeader>
          <CardTitle>Join Room: {roomName}</CardTitle>
        </CardHeader>

        <CardContent className="space-y-6">
          {/* Camera preview */}
          <div className="relative aspect-video overflow-hidden rounded-lg bg-muted">
            {videoEnabled ? (
              <video
                ref={videoRef}
                autoPlay
                playsInline
                muted
                className="h-full w-full object-cover mirror"
                style={{ transform: "scaleX(-1)" }}
              />
            ) : (
              <div className="flex h-full items-center justify-center text-muted-foreground">
                <p>Camera off</p>
              </div>
            )}
          </div>

          {/* Device selectors */}
          {isLoadingDevices ? (
            <div className="flex items-center justify-center py-4 text-muted-foreground text-sm">
              <div className="h-4 w-4 animate-spin rounded-full border-2 border-current border-t-transparent mr-2" />
              Loading devices...
            </div>
          ) : (
            <div className="space-y-4">
              {/* Microphone selector */}
              <div className="space-y-2">
                <label htmlFor={audioSelectId} className="text-sm font-medium">
                  Microphone
                </label>
                <div className="flex items-center gap-2">
                  <Select
                    value={selectedAudioId}
                   
                  >
                    <SelectTrigger id={audioSelectId} className="flex-1">
                      <SelectValue placeholder="Select microphone" />
                    </SelectTrigger>
                    <SelectContent>
                      {audioDevices.map((device) => (
                        <SelectItem
                          key={`${audioSelectId}-${device.deviceId}`}
                          value={device.deviceId}
                        >
                          {device.label}
                        </SelectItem>
                      ))}
                    </SelectContent>
                  </Select>
                  <Button
                    variant={audioEnabled ? "secondary" : "destructive"}
                    size="sm"
                    => setAudioEnabled((prev) => !prev)}
                  >
                    {audioEnabled ? "On" : "Off"}
                  </Button>
                </div>
              </div>

              {/* Camera selector */}
              <div className="space-y-2">
                <label htmlFor={videoSelectId} className="text-sm font-medium">
                  Camera
                </label>
                <div className="flex items-center gap-2">
                  <Select
                    value={selectedVideoId}
                   
                  >
                    <SelectTrigger id={videoSelectId} className="flex-1">
                      <SelectValue placeholder="Select camera" />
                    </SelectTrigger>
                    <SelectContent>
                      {videoDevices.map((device) => (
                        <SelectItem
                          key={`${videoSelectId}-${device.deviceId}`}
                          value={device.deviceId}
                        >
                          {device.label}
                        </SelectItem>
                      ))}
                    </SelectContent>
                  </Select>
                  <Button
                    variant={videoEnabled ? "secondary" : "destructive"}
                    size="sm"
                    => setVideoEnabled((prev) => !prev)}
                  >
                    {videoEnabled ? "On" : "Off"}
                  </Button>
                </div>
              </div>
            </div>
          )}
        </CardContent>

        <CardFooter>
          <Button className="w-full" size="lg">
            Join Room
          </Button>
        </CardFooter>
      </Card>
    </div>
  );
}

Usage

Basic Video Call Page

// src/app/video/[roomName]/page.tsx
"use client";

import { useState, use } from "react";
import { VideoRoomProvider } from "@/components/video/video-room-provider";
import { ParticipantGrid } from "@/components/video/participant-grid";
import { ControlsBar } from "@/components/video/controls-bar";
import { PrejoinScreen } from "@/components/video/prejoin-screen";

type PageProps = {
  params: Promise<{ roomName: string }>;
};

export default function VideoRoomPage({ params }: PageProps) {
  const { roomName } = use(params);
  const [joined, setJoined] = useState(false);

  if (!joined) {
    return (
      <PrejoinScreen
        roomName={roomName}
        => setJoined(true)}
      />
    );
  }

  return (
    <div className="flex h-screen flex-col">
      <VideoRoomProvider roomName={roomName}>
        <div className="flex-1 min-h-0">
          <ParticipantGrid className="h-full" />
        </div>
        <ControlsBar => setJoined(false)} />
      </VideoRoomProvider>
    </div>
  );
}

Speaker View Layout

"use client";

import { VideoRoomProvider } from "@/components/video/video-room-provider";
import { SpeakerView } from "@/components/video/speaker-view";
import { ControlsBar } from "@/components/video/controls-bar";

function MeetingRoom({ roomName }: { roomName: string }) {
  return (
    <div className="flex h-screen flex-col">
      <VideoRoomProvider roomName={roomName}>
        <div className="flex-1 min-h-0">
          <SpeakerView className="h-full" />
        </div>
        <ControlsBar />
      </VideoRoomProvider>
    </div>
  );
}

Prejoin with Custom Settings

"use client";

import { PrejoinScreen } from "@/components/video/prejoin-screen";

function Lobby({ roomName }: { roomName: string }) {
  const handleJoin = (settings: {
    audioDeviceId: string | undefined;
    videoDeviceId: string | undefined;
    audioEnabled: boolean;
    videoEnabled: boolean;
  }) => {
    console.log("Joining with settings:", settings);
    // Navigate to room or set joined state
  };

  return <PrejoinScreen roomName={roomName} />;
}

Component Reference

Acceptance Criteria

• VideoRoomProvider fetches a token from /api/video/token and connects to LiveKit
• ParticipantGrid renders all participants in a responsive grid
• SpeakerView shows the active speaker in a spotlight with others as thumbnails
• ControlsBar toggles microphone, camera, and screen share correctly
• PrejoinScreen enumerates devices and shows a camera preview
• PrejoinScreen allows selecting different audio/video devices
• ParticipantTile shows a speaking indicator when the participant is speaking
• ParticipantTile shows an avatar fallback when video is off
• All components use shadcn/ui Button, Card, Select, Avatar
• @livekit/components-styles/prefabs.css is imported in the provider
• No usage of any type anywhere in the code
• All components with hooks use "use client" directive
• useId is used for generating keys in lists
• tsc passes with no errors
• bun run build succeeds

Troubleshooting

"LiveKitRoom" errors about missing context

Symptoms: useLocalParticipant or useTracks throws "must be used within LiveKitRoom".

Cause: Component is not wrapped in VideoRoomProvider or LiveKitRoom.

Fix: Ensure all video UI components are rendered as children of VideoRoomProvider.

Camera preview is mirrored

Symptoms: Text appears backwards in the prejoin camera preview.

Cause: The preview video is CSS-mirrored with transform: scaleX(-1) for a natural selfie view. This is intentional and matches the behavior of Zoom, Google Meet, etc.

Device list is empty

Symptoms: No devices appear in the PrejoinScreen dropdowns.

Cause: Browser permissions for camera/microphone were denied, or the page is not served over HTTPS.

Fix:

1. Check browser permissions in the address bar
2. For local development, localhost is treated as secure
3. For deployment, ensure the site is served over HTTPS

Grid layout looks wrong

Symptoms: Participant tiles are very small or overlap.

Cause: The parent container does not have a defined height.

Fix: Ensure the parent of ParticipantGrid has h-full or an explicit height. The grid uses auto-rows-fr which requires a sized container.

Token fetch fails with 401

Symptoms: VideoRoomProvider shows "Failed to join room" with a 401 error.

Cause: The user is not authenticated.

Fix: Ensure the user is signed in via better-auth before rendering VideoRoomProvider. The /api/video/token route requires authentication.