完成

WebApp/client/public/onebyone/index.html

@@ -180,35 +180,6 @@
                     </div>
                 </div>
 
-                <!-- 远端信息覆盖层 -->
-                <div class="absolute top-6 left-6 glass px-4 py-2 rounded-full flex items-center gap-3">
-                    <div class="relative">
-                        <!-- [DATA_FIELD: remoteUser.avatar] [TYPE: string] [URL] [REQUIRED] -->
-                        <img id="remoteAvatar"
-                            src="https://images.unsplash.com/photo-1494790108377-be9c29b29330?w=100&h=100&fit=crop"
-                            class="w-8 h-8 rounded-full object-cover" data-field="remoteUser.avatar">
-
-                        <!-- [CONDITIONAL_RENDER: remoteUser.mediaState.isSpeaking === true] -->
-                        <div id="remoteSpeakingIndicator"
-                            class="absolute -bottom-1 -right-1 w-3 h-3 bg-green-500 rounded-full border-2 border-slate-900 hidden"
-                            data-field="remoteUser.isSpeaking"></div>
-                    </div>
-                    <div>
-                        <!-- [DATA_FIELD: remoteUser.name] [TYPE: string] -->
-                        <div class="text-sm font-medium" data-field="remoteUser.name" id="remoteName">Sarah Chen</div>
-                        <div class="text-xs text-gray-400 flex items-center gap-2">
-                            <!-- [DATA_FIELD: remoteUser.status] [TYPE: string] [ENUM: online/offline/connecting] -->
-                            <span id="remoteStatus" data-field="remoteUser.status">正在通话</span>
-
-                            <!-- [CONDITIONAL_RENDER: remoteUser.mediaState.isSpeaking === true && remoteUser.mediaState.audio === true] -->
-                            <div id="remoteAudioWave" class="audio-wave w-6 hidden"
-                                data-field="remoteUser.audioActivity">
-                                <span></span><span></span><span></span><span></span><span></span>
-                            </div>
-                        </div>
-                    </div>
-                </div>
-
                 <!-- 网络状态提示 -->
                 <!-- [CONDITIONAL_RENDER: remoteUser.networkQuality !== 'excellent'] -->
                 <div id="networkStatus"

WebApp/client/public/onebyone/renderer.js

@@ -29,12 +29,6 @@ class UIRenderer {
             // 远端视频
             remoteVideo: document.getElementById('remoteVideo'),
             remoteVideoPlaceholder: document.getElementById('remoteVideoPlaceholder'),
-            remoteAvatar: document.getElementById('remoteAvatar'),
-            remoteName: document.getElementById('remoteName'),
-            remoteStatus: document.getElementById('remoteStatus'),
-            remoteSpeakingIndicator: document.getElementById('remoteSpeakingIndicator'),
-            remoteAudioWave: document.getElementById('remoteAudioWave'),
-            remoteInfoOverlay: document.querySelector('.absolute.top-6.left-6.glass'),
             networkStatus: document.getElementById('networkStatus'),
             networkStatusText: document.getElementById('networkStatusText'),
             connectingOverlay: document.getElementById('connectingOverlay'),
@@ -243,43 +237,6 @@ class UIRenderer {
 
     // 渲染远端视频
     renderRemoteVideo(remoteUser) {
-        // 找到远端信息覆盖层元素
-        const remoteInfoOverlay = this.elements.remoteName?.closest('.absolute.top-6.left-6.glass');
-
-        // 未连接时不显示红框部分
-        if (remoteUser.status === 'offline') {
-            // 隐藏整个远端信息覆盖层
-            if (remoteInfoOverlay) {
-                remoteInfoOverlay.classList.add('hidden');
-            }
-        } else {
-            // 显示远端信息覆盖层
-            if (remoteInfoOverlay) {
-                remoteInfoOverlay.classList.remove('hidden');
-            }
-
-            // 连接后更新头像和名称数据
-            if (this.elements.remoteName) {
-                this.elements.remoteName.textContent = remoteUser.name;
-            }
-
-            if (this.elements.remoteAvatar) {
-                this.elements.remoteAvatar.src = remoteUser.avatar;
-                this.elements.remoteAvatar.classList.remove('hidden');
-            }
-
-            if (this.elements.remoteStatus) {
-                // 显示与黄框中一致的状态
-                if (!remoteUser.mediaState.audio) {
-                    this.elements.remoteStatus.textContent = '静音中';
-                } else if (!remoteUser.mediaState.video) {
-                    this.elements.remoteStatus.textContent = '视频关闭';
-                } else {
-                    this.elements.remoteStatus.textContent = this.getStatusText(remoteUser.status);
-                }
-            }
-        }
-
         // 同步更新侧边栏用户列表
         this.renderUserList(this.stateManager.getState().session.localUser, remoteUser, this.stateManager.getState().participants);
 
@@ -317,15 +274,6 @@ class UIRenderer {
             }
         }
 
-        // 渲染说话状态
-        if (this.elements.remoteSpeakingIndicator) {
-            toggleElement(this.elements.remoteSpeakingIndicator, remoteUser.mediaState.isSpeaking);
-        }
-
-        if (this.elements.remoteAudioWave) {
-            toggleElement(this.elements.remoteAudioWave, remoteUser.mediaState.isSpeaking && remoteUser.mediaState.audio);
-        }
-
         // 渲染网络状态
         this.renderNetworkStatus(remoteUser.networkQuality);
 
@@ -471,8 +419,15 @@ class UIRenderer {
             // 视频元素显示participant的远端视频流
             const video = tile.querySelector('video');
             if (video && stream) {
-                video.srcObject = stream;
-                console.log(`Set remote stream for participant tile ${connectionId}`);
+                // 避免重复设置同一流对象（音频先到、视频后到时流对象相同）
+                if (video.srcObject === stream) {
+                    console.log(`Same stream for participant ${connectionId}, ensuring playback`);
+                    video.play().catch(e => console.log('Auto-play prevented:', e.message));
+                } else {
+                    video.srcObject = stream;
+                    video.play().catch(e => console.log('Auto-play prevented:', e.message));
+                    console.log(`Set remote stream for participant tile ${connectionId}`);
+                }
             }
 
             // 隐藏单路远端视频和占位符
@@ -546,91 +501,66 @@ class UIRenderer {
 
     // 渲染Participant端的单一远端视频（Host画面）
     renderSingleRemoteStream(stream) {
-        if (this.elements.remoteVideo && stream) {
-            console.log('Rendering remote stream:', stream);
-
-            // 即使流对象相同，也要重新设置，确保视频元素能够识别轨道变化
-            this.elements.remoteVideo.srcObject = null;
-
-            // 延迟设置srcObject，确保视频元素能够正确处理
-            setTimeout(() => {
-                this.elements.remoteVideo.srcObject = stream;
-                console.log('Remote stream reset successfully:', stream);
-
-                // 确保视频元素的属性正确设置
-                this.elements.remoteVideo.autoplay = true;
-                this.elements.remoteVideo.playsinline = true;
-                this.elements.remoteVideo.muted = false; // 不要静音远程视频，否则听不到对方的声音
-
-                // 关键设置：启用硬件加速和最佳质量渲染
-                this.elements.remoteVideo.style.transform = 'translateZ(0)'; // 启用硬件加速
-                this.elements.remoteVideo.style.imageRendering = 'pixelated'; // 保持像素清晰
-                this.elements.remoteVideo.style.objectFit = 'contain'; // 保持比例
-
-                // 隐藏断开连接覆盖层
-                if (this.elements.disconnectedOverlay) {
-                    this.elements.disconnectedOverlay.classList.add('hidden');
-                }
-
-
-
-                // 获取视频轨道并处理分辨率
-                const videoTracks = stream.getVideoTracks();
-                console.log('Remote video tracks:', videoTracks);
-
-                // 检查是否有有效的视频轨道
-                const hasValidVideoTrack = videoTracks.length > 0 && videoTracks.some(track => {
-                    // 检查轨道是否已停止或被禁用
-                    return track.readyState === 'live';
-                });
-
-                console.log('Has valid video track:', hasValidVideoTrack);
-
-                if (hasValidVideoTrack) {
-                    console.log('Found valid video tracks, updating resolution');
-                    const activeVideoTrack = videoTracks.find(track => track.readyState === 'live');
-                    if (activeVideoTrack) {
-                        const resolution = this.getVideoResolution(activeVideoTrack);
-                        this.adjustVideoSize(this.elements.remoteVideo, resolution);
-
-                        // 监听轨道变化，处理分辨率调整
-                        activeVideoTrack.addEventListener('resize', () => {
-                            const newResolution = this.getVideoResolution(activeVideoTrack);
-                            this.adjustVideoSize(this.elements.remoteVideo, newResolution);
-                        });
-                    }
-                    // 隐藏连接中提示
-                    if (this.elements.connectingOverlay) {
-                        this.elements.connectingOverlay.classList.add('hidden');
-                    }
-
-                    // 隐藏占位背景
-                    if (this.elements.remoteVideoPlaceholder) {
-                        this.elements.remoteVideoPlaceholder.classList.add('hidden');
-                    }
-                } else {
-                    console.log('No valid video tracks in remote stream');
-                    // 清空视频元素的源
-                    this.elements.remoteVideo.srcObject = null;
-
-                    // 显示占位背景
-                    if (this.elements.remoteVideoPlaceholder) {
-                        this.elements.remoteVideoPlaceholder.classList.remove('hidden');
-                    }
-                }
-            }, 50); // 增加延迟时间，确保视频元素有足够的时间处理
-        } else {
+        if (!this.elements.remoteVideo || !stream) {
             console.error('Either remoteVideo element or stream is missing');
+            return;
+        }
 
-            // 清空视频元素的源
-            if (this.elements.remoteVideo) {
-                this.elements.remoteVideo.srcObject = null;
-            }
+        console.log('Rendering remote stream:', stream, 'tracks:', stream.getTracks().map(t => `${t.kind}(${t.readyState})`));
 
-            // 显示占位背景
+        // 关键修复：避免 srcObject = null 的重置模式
+        // 如果 srcObject 已经是同一个 stream 对象，说明是同一流的轨道更新（如音频先到，视频后到）
+        // 浏览器会自动识别新添加的轨道，无需重置 srcObject
+        if (this.elements.remoteVideo.srcObject === stream) {
+            console.log('Same stream object, track added - ensuring playback');
+            this.elements.remoteVideo.play().catch(e => console.log('Auto-play prevented:', e.message));
+            return;
+        }
+
+        // 首次设置或流对象变化：直接设置 srcObject（不使用 null 重置模式）
+        this.elements.remoteVideo.srcObject = stream;
+        this.elements.remoteVideo.autoplay = true;
+        this.elements.remoteVideo.playsinline = true;
+        this.elements.remoteVideo.muted = false;
+
+        // 确保视频开始播放
+        this.elements.remoteVideo.play().catch(e => {
+            console.log('Auto-play prevented, will retry on interaction:', e.message);
+        });
+
+        // 隐藏断开连接覆盖层
+        if (this.elements.disconnectedOverlay) {
+            this.elements.disconnectedOverlay.classList.add('hidden');
+        }
+
+        // 监听视频轨道变化
+        const videoTracks = stream.getVideoTracks();
+        const audioTracks = stream.getAudioTracks();
+        console.log(`Stream has ${videoTracks.length} video tracks, ${audioTracks.length} audio tracks`);
+
+        if (videoTracks.length > 0) {
+            // 有视频轨道：隐藏占位符
             if (this.elements.remoteVideoPlaceholder) {
-                this.elements.remoteVideoPlaceholder.classList.remove('hidden');
+                this.elements.remoteVideoPlaceholder.classList.add('hidden');
             }
+            if (this.elements.connectingOverlay) {
+                this.elements.connectingOverlay.classList.add('hidden');
+            }
+
+            // 监听视频轨道分辨率变化
+            const activeVideoTrack = videoTracks.find(track => track.readyState === 'live');
+            if (activeVideoTrack) {
+                const resolution = this.getVideoResolution(activeVideoTrack);
+                this.adjustVideoSize(this.elements.remoteVideo, resolution);
+                activeVideoTrack.addEventListener('resize', () => {
+                    const newResolution = this.getVideoResolution(activeVideoTrack);
+                    this.adjustVideoSize(this.elements.remoteVideo, newResolution);
+                });
+            }
+        } else {
+            // 只有音频轨道（视频轨道尚未到达）：不显示占位符，等待视频轨道到达
+            // 不设置 srcObject = null，保持音频播放
+            console.log('Audio-only stream, waiting for video track...');
         }
     }
 

WebApp/client/public/onebyone/store.js

@@ -480,13 +480,30 @@ class CallStateManager {
                 }
 
                 // 通知UI远程流已更新
-                this.notify({
-                    type: 'REMOTE_STREAM_OBTAINED',
-                    stream: targetStream,
-                    connectionId: trackParticipantId,
-                    isHost: isHost
-                });
-                console.log('Notified UI about remote stream update');
+                // 关键优化：如果是音频轨道先到达且流中尚无视频轨道，
+                // 延迟通知UI等待视频轨道到达，避免音频先触发的UI更新导致黑屏
+                const notifyStreamUpdate = () => {
+                    this.notify({
+                        type: 'REMOTE_STREAM_OBTAINED',
+                        stream: targetStream,
+                        connectionId: trackParticipantId,
+                        isHost: isHost
+                    });
+                    console.log('Notified UI about remote stream update');
+                };
+
+                if (data.track.kind === 'audio' && targetStream.getVideoTracks().length === 0) {
+                    // 音频先到，视频尚未到达：延迟200ms通知，给视频轨道到达的机会
+                    console.log('Audio track arrived first, delaying stream notification for video track...');
+                    setTimeout(() => {
+                        const nowHasVideo = targetStream.getVideoTracks().length > 0;
+                        console.log(`After delay, stream has video: ${nowHasVideo}`);
+                        notifyStreamUpdate();
+                    }, 200);
+                } else {
+                    // 视频轨道到达，或音频视频同时存在：立即通知
+                    notifyStreamUpdate();
+                }
                 // 只有当收到远程流时才更新远程用户状态为在线
                 if (this.state.session.remoteUser.status !== 'online') {
                     this.updateRemoteUserStatus('online');