视频连线

backend/go-service/app/constants/meeting.go

@@ -81,7 +81,7 @@ var MeetingLeftReasonMap = map[string]string{
 
 // 会议默认配置（应用层强制约束）
 const (
-	MeetingMVPMaxMembers       = 8   // MVP 阶段单会议硬上限
+	MeetingMVPMaxMembers       = 1000000   // MVP 阶段单会议硬上限
 	MeetingRoomCodeLength      = 9   // 会议号去连字符后的长度（XXX-XXX-XXX）
 	MeetingRoomCodeRetryMax    = 3   // 生成会议号冲突重试上限
 	MeetingPasswordMaxAttempts = 5   // 密码连续错误锁定阈值

backend/go-service/app/dto/meeting_dto.go

@@ -64,7 +64,7 @@ type MeetingChatDTO struct {
 type CreateMeetingRoomRequest struct {
 	Title      string `json:"title" binding:"required,min=1,max=200"`  // 会议标题
 	Password   string `json:"password" binding:"omitempty,min=4,max=20"` // 可选入会密码（纯文本入参，服务端 bcrypt 哈希存储）
-	MaxMembers int    `json:"max_members" binding:"omitempty,min=2,max=8"` // 可选上限（MVP 硬上限 8，留参数为 Phase 2e-3 扩展）
+	MaxMembers int    `json:"max_members" binding:"omitempty,min=2"` // 可选上限
 }
 
 // CreateMeetingRoomResponse 创建会议响应

backend/go-service/app/meeting/controller/meeting_controller.go

@@ -249,8 +249,7 @@ func (ctl *MeetingController) CloudLawCreateMeeting(c *gin.Context) {
 		return
 	}
 	room, _, _, err := ctl.meetingService.CreateRoomForInternal(c.Request.Context(), hostUser.ID, &dto.CreateMeetingRoomRequest{
-		Title:      title,
+		Title: title,
-		MaxMembers: 2,
 	})
 	if err != nil {
 		ctl.handleError(c, err, "创建云律会议失败")

backend/go-service/app/meeting/model/meeting_room.go

@@ -13,7 +13,7 @@ type MeetingRoom struct {
 	HostID        int64      `json:"host_id" gorm:"not null;index:idx_meeting_rooms_host_status,priority:1"` // 主持人用户 ID
 	Type          int        `json:"type" gorm:"not null;default:1"`                                   // 会议类型：1=即时，2=预约
 	PasswordHash  *string    `json:"-" gorm:"size:255"`                                                // 入会密码 bcrypt 哈希，NULL 表示无密码；JSON 始终剥离
-	MaxMembers    int        `json:"max_members" gorm:"not null;default:50"`                           // 房间最大成员数，MVP 应用层强制 8
+	MaxMembers    int        `json:"max_members" gorm:"not null;default:50"`                           // 房间最大成员数
 	Status        int        `json:"status" gorm:"not null;default:0;index:idx_meeting_rooms_host_status,priority:2"` // 状态：0=未开始，1=进行中，2=已结束
 	ScheduledAt   *time.Time `json:"scheduled_at" gorm:"type:timestamp(0)"`                            // 预约开始时间，即时会议为 NULL
 	StartedAt     *time.Time `json:"started_at" gorm:"type:timestamp(0)"`                              // 实际开始时间

backend/go-service/app/meeting/service/meeting_service.go

@@ -398,13 +398,6 @@ func (s *MeetingService) JoinRoomForInternal(ctx context.Context, userID int64,
 		routerID, _ := s.mediaOrchestrator.ResolveRouterID(code)
 		return room, existing, routerID, nil
 	}
-	activeCount, err := s.participantDAO.CountActiveByRoom(ctx, room.ID)
-	if err != nil {
-		return nil, nil, "", err
-	}
-	if int(activeCount) >= room.MaxMembers {
-		return nil, nil, "", ErrMeetingFull
-	}
 	participant, err := s.participantDAO.JoinRoom(ctx, room.ID, userID, constants.MeetingRoleParticipant)
 	if err != nil {
 		if errors.Is(err, dao.ErrAlreadyInMeeting) {
@@ -635,14 +628,6 @@ func (s *MeetingService) JoinRoom(ctx context.Context, userID int64, code, passw
 		s.redis.Del(ctx, redisPasswordAttemptPrefix+code+":"+strconv.FormatInt(userID, 10))
 	}
 
-	activeCount, err := s.participantDAO.CountActiveByRoom(ctx, room.ID)
-	if err != nil {
-		return nil, nil, "", err
-	}
-	if int(activeCount) >= room.MaxMembers {
-		return nil, nil, "", ErrMeetingFull
-	}
-
 	participant, err := s.participantDAO.JoinRoom(ctx, room.ID, userID, constants.MeetingRoleParticipant)
 	if err != nil {
 		return nil, nil, "", err

deploy/docker/postgres/init.sql

@@ -440,7 +440,7 @@ COMMENT ON COLUMN meeting_rooms.title         IS '会议标题';
 COMMENT ON COLUMN meeting_rooms.host_id       IS '主持人用户 ID，引用 auth_users.id';
 COMMENT ON COLUMN meeting_rooms.type          IS '会议类型：1=即时（MVP 仅此），2=预约（Phase 2e-3）';
 COMMENT ON COLUMN meeting_rooms.password_hash IS '入会密码 bcrypt 哈希，NULL 表示无密码';
-COMMENT ON COLUMN meeting_rooms.max_members   IS '房间最大成员数；MVP 应用层强制 8，schema 默认 50 供后续扩展';
+COMMENT ON COLUMN meeting_rooms.max_members   IS '房间最大成员数，schema 默认 50';
 COMMENT ON COLUMN meeting_rooms.status        IS '0=未开始（仅预约），1=进行中，2=已结束';
 COMMENT ON COLUMN meeting_rooms.scheduled_at  IS '预约开始时间，即时会议为 NULL';
 COMMENT ON COLUMN meeting_rooms.started_at    IS '实际开始时间，host 首次加入时回填';

deploy/docker/postgres/phase2e2_migration.sql

@@ -29,7 +29,7 @@ COMMENT ON COLUMN meeting_rooms.title         IS '会议标题';
 COMMENT ON COLUMN meeting_rooms.host_id       IS '主持人用户 ID，引用 auth_users.id';
 COMMENT ON COLUMN meeting_rooms.type          IS '会议类型：1=即时（MVP 仅此），2=预约（Phase 2e-3）';
 COMMENT ON COLUMN meeting_rooms.password_hash IS '入会密码 bcrypt 哈希，NULL 表示无密码';
-COMMENT ON COLUMN meeting_rooms.max_members   IS '房间最大成员数；MVP 应用层强制 8，schema 默认 50 供后续扩展';
+COMMENT ON COLUMN meeting_rooms.max_members   IS '房间最大成员数，schema 默认 50';
 COMMENT ON COLUMN meeting_rooms.status        IS '0=未开始（仅预约），1=进行中，2=已结束';
 COMMENT ON COLUMN meeting_rooms.scheduled_at  IS '预约开始时间，即时会议为 NULL';
 COMMENT ON COLUMN meeting_rooms.started_at    IS '实际开始时间，host 首次加入时回填';

frontend/src/components/meeting/MeetingToolbar.vue

@@ -28,7 +28,7 @@
           <line x1="8" y1="23" x2="16" y2="23"></line>
         </svg>
       </view>
-      <text class="label">{{ audioEnabled ? '静音' : '解除' }}</text>
+      <text class="label">{{ audioEnabled ? '静音' : '开麦' }}</text>
     </button>
 
     <button class="btn" :class="{ active: videoEnabled, loading: videoLoading }" :disabled="videoLoading" @click="emitIf('cam-toggle')">
@@ -42,11 +42,14 @@
           <path d="M16 16v2a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h2m5.66 0H14a2 2 0 0 1 2 2v4m0 0l6-4v10"></path>
         </svg>
       </view>
-      <text class="label">{{ videoEnabled ? '停止视频' : '开启视频' }}</text>
+      <text class="label">
+        <text class="label-desktop">{{ videoEnabled ? '停止视频' : '开启视频' }}</text>
+        <text class="label-mobile">视频</text>
+      </text>
     </button>
 
     <button
-      class="btn"
+      class="btn btn-screen"
       :class="{ active: screenSharing, loading: screenLoading }"
       :disabled="screenLoading || screenDisabled"
       :title="screenDisabledReason || ''"
@@ -70,7 +73,10 @@
           <line x1="12" y1="7" x2="12" y2="14"></line>
         </svg>
       </view>
-      <text class="label">{{ screenSharing ? '停止共享' : '共享屏幕' }}</text>
+      <text class="label">
+        <text class="label-desktop">{{ screenSharing ? '停止共享' : '共享屏幕' }}</text>
+        <text class="label-mobile">共享</text>
+      </text>
     </button>
 
     <!-- 录制按钮（Phase B）：仅主持人可见；recording=true 时红色脉动；上传中禁用 -->
@@ -90,7 +96,10 @@
           <circle cx="12" cy="12" r="3"></circle>
         </svg>
       </view>
-      <text class="label">{{ recording ? '停止录制' : '开始录制' }}</text>
+      <text class="label">
+        <text class="label-desktop">{{ recording ? '停止录制' : '开始录制' }}</text>
+        <text class="label-mobile">录制</text>
+      </text>
     </button>
 
     <button class="btn" @click="emitIf('invite')">
@@ -251,6 +260,7 @@ const emitIf = (name) => {
   letter-spacing: 0.5rpx;
   color: inherit;
 }
+.label-mobile { display: none; }
 
 .btn-leave .icon { background: #EF4444; }
 .btn-leave:hover .icon { background: #DC2626; }
@@ -284,9 +294,91 @@ const emitIf = (name) => {
 }
 .badge.badge-red { background: #EF4444; }
 
-@media (max-width: 420px) {
+@media (max-width: 750px) {
-  .btn { min-width: 88rpx; }
+  .toolbar {
-  .icon { width: 64rpx; height: 64rpx; }
+    position: fixed;
-  .label { font-size: 20rpx; }
+    left: 14rpx;
+    right: 14rpx;
+    bottom: calc(12rpx + env(safe-area-inset-bottom));
+    justify-content: space-between;
+    gap: 6rpx;
+    box-sizing: border-box;
+    padding: 14rpx 14rpx;
+    background: rgba(7, 15, 30, 0.9);
+    backdrop-filter: blur(18px);
+    border: 1rpx solid rgba(148, 163, 184, 0.18);
+    border-radius: 32rpx;
+    box-shadow: 0 12rpx 34rpx rgba(0, 0, 0, 0.42);
+    overflow-x: hidden;
+    overflow-y: hidden;
+  }
+  .btn {
+    min-width: 0;
+    flex: 1 1 0;
+    gap: 6rpx;
+    padding: 4rpx 0;
+    border-radius: 18rpx;
+  }
+  .btn:hover { background: transparent; }
+  .btn:active { background: rgba(255, 255, 255, 0.08); }
+  .btn-screen {
+    display: none;
+  }
+  .icon {
+    width: 56rpx;
+    height: 56rpx;
+    background: rgba(51, 65, 85, 0.92);
+    box-shadow: inset 0 0 0 1rpx rgba(255, 255, 255, 0.08);
+  }
+  .icon svg {
+    width: 40rpx;
+    height: 40rpx;
+  }
+  .btn.active .icon { background: #2563EB; }
+  .btn[disabled] .icon {
+    background: rgba(30, 41, 59, 0.72);
+    color: rgba(255, 255, 255, 0.38);
+    box-shadow: inset 0 0 0 1rpx rgba(255, 255, 255, 0.05);
+  }
+  .btn[disabled] .label { color: rgba(255, 255, 255, 0.36); }
+  .btn-leave .icon { background: #EF4444; }
+  .btn-leave .label { color: #FECACA; }
+  .label {
+    max-width: 100%;
+    font-size: 19rpx;
+    line-height: 1;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+  .label-desktop { display: none; }
+  .label-mobile { display: inline; }
+  .badge {
+    top: -8rpx;
+    right: -8rpx;
+    min-width: 28rpx;
+    height: 28rpx;
+    font-size: 16rpx;
+  }
+}
+
+@media (max-width: 380px) {
+  .toolbar {
+    left: 10rpx;
+    right: 10rpx;
+    padding-left: 8rpx;
+    padding-right: 8rpx;
+  }
+  .icon {
+    width: 50rpx;
+    height: 50rpx;
+  }
+  .icon svg {
+    width: 36rpx;
+    height: 36rpx;
+  }
+  .label {
+    font-size: 17rpx;
+  }
 }
 </style>

frontend/src/components/meeting/VideoTile.vue

@@ -49,12 +49,14 @@ const props = defineProps({
   audioTrack: { type: Object, default: null },
   videoTrack: { type: Object, default: null },
   isSpeaking: { type: Boolean, default: false },
-  compact: { type: Boolean, default: false }
+  compact: { type: Boolean, default: false },
+  videoFit: { type: String, default: 'cover' }
 })
 
 const mediaBox = ref(null)
 
 const hasVideo = computed(() => !!props.videoTrack && props.videoEnabled)
+const normalizedVideoFit = computed(() => props.videoFit === 'contain' ? 'contain' : 'cover')
 
 const avatarInitial = computed(() => {
   const s = (props.name || '').trim()
@@ -82,7 +84,7 @@ const ensureMediaEl = (tagName) => {
     if (tagName === 'video') {
       el.style.width = '100%'
       el.style.height = '100%'
-      el.style.objectFit = 'cover'
+      el.style.objectFit = normalizedVideoFit.value
       el.style.background = '#0B1220'
       el.style.display = 'block'
     }
@@ -134,6 +136,7 @@ const applyVideo = (retry = 0) => {
     }
     const el = ensureMediaEl('video')
     if (!el) return
+    el.style.objectFit = normalizedVideoFit.value
     // 关键：<video> 必须 muted 才能在 Chrome / 微信内核里自动播放。
     // 音频在独立的 <audio> 元素上播放，所以此处 muted 不会让对方静音，
     // 同时彻底解决"进会黑屏，必须点切换按钮才出图"的问题。
@@ -183,7 +186,7 @@ const applyAudio = (retry = 0) => {
   // #endif
 }
 
-watch(() => [props.videoTrack, props.videoEnabled], () => nextTick(() => applyVideo()), { immediate: true })
+watch(() => [props.videoTrack, props.videoEnabled, props.videoFit], () => nextTick(() => applyVideo()), { immediate: true })
 watch(() => [props.audioTrack, props.audioEnabled, props.isLocal], () => nextTick(() => applyAudio()), { immediate: true })
 
 // 修复刚进入会议时画面不显示、必须点切换才出图的问题：
@@ -350,4 +353,25 @@ onBeforeUnmount(() => {
 .tile.compact .footer { padding: 8rpx 12rpx; }
 .tile.compact .name { font-size: 20rpx; }
 .tile.compact .tag { font-size: 18rpx; padding: 2rpx 8rpx; }
+
+@media (max-width: 750px) {
+  .footer {
+    left: 12rpx;
+    right: 12rpx;
+    bottom: 12rpx;
+    padding: 8rpx 12rpx;
+    border-radius: 14rpx;
+    background: rgba(2, 6, 23, 0.62);
+    backdrop-filter: blur(10px);
+  }
+  .name {
+    font-size: 20rpx;
+  }
+  .tile.compact .footer {
+    left: 8rpx;
+    right: 8rpx;
+    bottom: 8rpx;
+    padding: 6rpx 10rpx;
+  }
+}
 </style>

frontend/src/constants/meeting.js

@@ -90,7 +90,7 @@ export const MEETING_HOST_AUTO_REASON_LABEL = {
 
 // ==================== 默认配置常量 ====================
 
-export const MEETING_MVP_MAX_MEMBERS = 8             // MVP 单会议硬上限
+export const MEETING_MVP_MAX_MEMBERS = 1000000       // MVP 单会议硬上限
 export const MEETING_HOST_GRACE_SECONDS = 120        // 主持人掉线宽限期（Task 8）
 export const MEETING_EMPTY_ROOM_TTL_SECONDS = 300    // 空房销毁 TTL（Task 8）
 export const MEETING_WS_ACK_TIMEOUT_MS = 10000       // WS 事件 ACK 等待超时（Task 9）

frontend/src/pages.json

@@ -9,7 +9,7 @@
 		{
 			"path": "pages/index/index",
 			"style": {
-				"navigationBarTitleText": "EchoChat",
+				"navigationBarTitleText": "赏讼视频会议系统",
 				"navigationStyle": "custom"
 			}
 		},
@@ -227,7 +227,7 @@
 	},
 	"globalStyle": {
 		"navigationBarTextStyle": "black",
-		"navigationBarTitleText": "EchoChat",
+		"navigationBarTitleText": "赏讼视频会议系统",
 		"navigationBarBackgroundColor": "#FFFFFF",
 		"backgroundColor": "#F8FAFC"
 	}

frontend/src/pages/auth/login.vue

@@ -20,9 +20,9 @@
     <!-- 顶部品牌区域 -->
     <view class="brand-section">
       <view class="logo-box">
-        <text class="logo-letter">E</text>
+        <image class="brand-logo" src="/static/shangsong.png" mode="aspectFit" />
       </view>
-      <text class="brand-name">EchoChat</text>
+      <text class="brand-name">赏讼视频会议系统</text>
       <text class="brand-slogan">连接无限，沟通无界</text>
     </view>
 
@@ -80,8 +80,14 @@
           <view class="oauth-line"></view>
         </view>
         <view class="oauth-buttons">
-          <button class="oauth-btn oauth-wechat" :disabled="oauthLoading" @tap="oauthLogin('wechat')">微信登录</button>
+          <button class="oauth-btn oauth-wechat" :disabled="oauthLoading" @tap="oauthLogin('wechat')">
-          <button class="oauth-btn oauth-qq" :disabled="oauthLoading" @tap="oauthLogin('qq')">QQ登录</button>
+            <image class="oauth-icon" src="/static/weixin.png" mode="aspectFit" />
+            <text>微信登录</text>
+          </button>
+          <button class="oauth-btn oauth-qq" :disabled="oauthLoading" @tap="oauthLogin('qq')">
+            <image class="oauth-icon" src="/static/qq.png" mode="aspectFit" />
+            <text>QQ登录</text>
+          </button>
         </view>
       </view>
 
@@ -272,17 +278,14 @@ export default {
 .logo-box {
   width: 112rpx;
   height: 112rpx;
-  border-radius: 24rpx;
-  background-color: #2563EB;
   display: flex;
   align-items: center;
   justify-content: center;
 }
 
-.logo-letter {
+.brand-logo {
-  font-size: 52rpx;
+  width: 112rpx;
-  font-weight: 700;
+  height: 112rpx;
-  color: #FFFFFF;
 }
 
 .brand-name {
@@ -433,6 +436,10 @@ export default {
   font-size: 28rpx;
   color: #FFFFFF;
   border: none;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12rpx;
 }
 
 .oauth-btn::after {
@@ -447,6 +454,11 @@ export default {
   background-color: #12B7F5;
 }
 
+.oauth-icon {
+  width: 52rpx;
+  height: 52rpx;
+}
+
 /* ---- 底部链接 ---- */
 .link-row {
   display: flex;

frontend/src/pages/auth/register.vue

@@ -20,10 +20,10 @@
     <!-- 顶部品牌区域 -->
     <view class="brand-section">
       <view class="logo-box">
-        <text class="logo-letter">E</text>
+        <image class="brand-logo" src="/static/shangsong.png" mode="aspectFit" />
       </view>
       <text class="brand-name">创建账号</text>
-      <text class="brand-slogan">加入 EchoChat，开启高效沟通</text>
+      <text class="brand-slogan">加入赏讼视频会议系统，开启高效沟通</text>
     </view>
 
     <!-- 表单卡片 -->
@@ -271,17 +271,14 @@ export default {
 .logo-box {
   width: 96rpx;
   height: 96rpx;
-  border-radius: 20rpx;
-  background-color: #2563EB;
   display: flex;
   align-items: center;
   justify-content: center;
 }
 
-.logo-letter {
+.brand-logo {
-  font-size: 44rpx;
+  width: 96rpx;
-  font-weight: 700;
+  height: 96rpx;
-  color: #FFFFFF;
 }
 
 .brand-name {

frontend/src/pages/meeting/room.vue

@@ -59,6 +59,7 @@
               :video-enabled="true"
               :audio-track="null"
               :video-track="screenTile.videoTrack"
+              video-fit="contain"
               :is-speaking="false"
             />
           </view>
@@ -241,6 +242,7 @@ const networkLevel = ref(4) // 持续接入 getStats 后动态更新（Task 16
 const startedAt = ref(0)
 const nowTs = ref(Date.now())
 let timerHandle = null
+let viewportCleanup = null
 
 /** 视频区容器引用：传给 SelfVideoFloat 计算吸附边界 */
 const videoCol = ref(null)
@@ -765,6 +767,15 @@ const redirectHome = () => {
   uni.reLaunch({ url: '/pages/index/index' })
 }
 
+const syncViewportHeight = () => {
+  // #ifdef H5
+  const height = window.visualViewport?.height || window.innerHeight
+  if (height > 0) {
+    document.documentElement.style.setProperty('--meeting-vh', `${height}px`)
+  }
+  // #endif
+}
+
 // ============ 生命周期 ============
 
 let stateStopWatch = null
@@ -787,6 +798,22 @@ onMounted(() => {
   // P2-3 修复：onLoad 已 redirectTo 跳转时，避免本页继续初始化定时器与 watcher
   if (redirectingToJoin) return
 
+  // #ifdef H5
+  syncViewportHeight()
+  const viewport = window.visualViewport
+  const onViewportChange = () => syncViewportHeight()
+  window.addEventListener('resize', onViewportChange)
+  window.addEventListener('orientationchange', onViewportChange)
+  viewport?.addEventListener?.('resize', onViewportChange)
+  viewport?.addEventListener?.('scroll', onViewportChange)
+  viewportCleanup = () => {
+    window.removeEventListener('resize', onViewportChange)
+    window.removeEventListener('orientationchange', onViewportChange)
+    viewport?.removeEventListener?.('resize', onViewportChange)
+    viewport?.removeEventListener?.('scroll', onViewportChange)
+  }
+  // #endif
+
   const startIso = meetingStore.currentRoom?.started_at || meetingStore.currentRoom?.created_at
   startedAt.value = startIso ? Date.parse(startIso) : Date.now()
   timerHandle = setInterval(() => { nowTs.value = Date.now() }, 1000)
@@ -807,6 +834,7 @@ onBeforeUnmount(() => {
     clearInterval(timerHandle)
     timerHandle = null
   }
+  if (viewportCleanup) { viewportCleanup(); viewportCleanup = null }
   if (stateStopWatch) { stateStopWatch(); stateStopWatch = null }
 })
 
@@ -832,8 +860,18 @@ onUnload(() => {
   inset: 0;
   width: 100vw;
   height: 100vh;
+  height: 100svh;
+  height: 100dvh;
+  height: var(--meeting-vh, 100dvh);
   min-width: 100vw;
   min-height: 100vh;
+  min-height: 100svh;
+  min-height: 100dvh;
+  min-height: var(--meeting-vh, 100dvh);
+  max-height: 100vh;
+  max-height: 100svh;
+  max-height: 100dvh;
+  max-height: var(--meeting-vh, 100dvh);
   display: flex;
   flex-direction: column;
   background: #0F172A;
@@ -1038,6 +1076,10 @@ onUnload(() => {
 .chat-col.open { width: 640rpx; }
 
 @media (max-width: 750px) {
+  .body {
+    padding-bottom: calc(142rpx + env(safe-area-inset-bottom));
+    box-sizing: border-box;
+  }
   /* 小屏幕：聊天面板改为全屏浮层，避免挤压视频 */
   .chat-col { position: fixed; top: 0; right: 0; bottom: 0; z-index: 205; }
   .chat-col.open { width: 100vw; }

frontend/src/store/meeting.js

@@ -1294,7 +1294,14 @@ export const useMeetingStore = defineStore('meeting', () => {
 
     const stream = await navigator.mediaDevices.getDisplayMedia({
       // 屏幕共享对帧率要求低、清晰度要求高，控制带宽优先保证清晰度
-      video: { frameRate: { ideal: 15, max: 30 } },
+      video: {
+        width: { ideal: 1920, max: 1920 },
+        height: { ideal: 1080, max: 1080 },
+        frameRate: { ideal: 15, max: 15 },
+        cursor: 'always',
+        displaySurface: 'monitor',
+        logicalSurface: true
+      },
       audio: false
     })
     const track = stream.getVideoTracks()[0]
@@ -1313,6 +1320,17 @@ export const useMeetingStore = defineStore('meeting', () => {
       producer = await _engine.produce({
         kind: 'video',
         track,
+        encodings: [
+          {
+            maxBitrate: 2500000,
+            maxFramerate: 15
+          }
+        ],
+        codecOptions: {
+          videoGoogleStartBitrate: 1500,
+          videoGoogleMinBitrate: 800,
+          videoGoogleMaxBitrate: 2500
+        },
         appData: { screen: true }
       })
     } catch (err) {
@@ -1321,6 +1339,12 @@ export const useMeetingStore = defineStore('meeting', () => {
       throw err
     }
     localProducers.screen = producer.id
+    if (typeof _engine.tuneProducerEncoding === 'function') {
+      _engine.tuneProducerEncoding(producer.id, {
+        maxBitrate: 2500000,
+        maxFramerate: 15
+      }).catch((err) => _log('warn', '[Meeting] 屏幕共享编码参数设置失败', err))
+    }
 
     // 浏览器原生"停止共享"按钮：用户从系统 UI 取消时 track 进入 ended，
     // 此时本地 producer.on('trackended') 也会触发关闭，这里加一层保险

frontend/src/utils/mediasoup-client.js

@@ -314,6 +314,27 @@ export function createMediaEngine({ roomCode, userId, sendWithAck, logger = defa
     return producer
   }
 
+  const tuneProducerEncoding = async (producerId, encodingPatch = {}) => {
+    const producer = producers.get(producerId)
+    const sender = producer && producer.rtpSender
+    if (!sender || typeof sender.getParameters !== 'function' || typeof sender.setParameters !== 'function') {
+      return false
+    }
+    try {
+      const params = sender.getParameters() || {}
+      params.encodings = Array.isArray(params.encodings) && params.encodings.length
+        ? params.encodings
+        : [{}]
+      params.encodings = params.encodings.map((encoding) => ({ ...encoding, ...encodingPatch }))
+      await sender.setParameters(params)
+      logger('info', '[MediaEngine] producer 编码参数已更新', { producerId, encodingPatch })
+      return true
+    } catch (e) {
+      logger('warn', '[MediaEngine] producer 编码参数更新失败', e)
+      return false
+    }
+  }
+
   /**
    * 订阅远端 Producer：请求后端创建 Consumer → 本地 consume → 等 track 挂好后 resume
    *
@@ -480,6 +501,7 @@ export function createMediaEngine({ roomCode, userId, sendWithAck, logger = defa
     closeProducer,
     pauseProducer,
     resumeProducer,
+    tuneProducerEncoding,
     closeConsumer,
     close,
     getDevice: () => device,

media-server/src/services/transport.service.ts

@@ -55,7 +55,7 @@ export async function createWebRtcTransport(params: {
     enableUdp: true,
     enableTcp: true,
     preferUdp: true,
-    initialAvailableOutgoingBitrate: 1_000_000,
+    initialAvailableOutgoingBitrate: 4_000_000,
     appData: {
       userId: params.userId,
       direction: params.direction,
@@ -63,6 +63,17 @@ export async function createWebRtcTransport(params: {
     },
   });
 
+  if (params.direction === 'send') {
+    try {
+      await transport.setMaxIncomingBitrate(4_000_000);
+    } catch (err) {
+      log.warn(
+        { transportId: transport.id, err: err instanceof Error ? err.message : String(err) },
+        'set max incoming bitrate failed',
+      );
+    }
+  }
+
   transport.observer.once('close', () => {
     transportMap.delete(transport.id);
     log.info(