diff --git a/conference.js b/conference.js
index ccbab6291071..abf9223fe921 100644
--- a/conference.js
+++ b/conference.js
@@ -72,6 +72,8 @@ import {
     getAvatarURLByParticipantId,
     getLocalParticipant,
     getParticipantById,
+    hiddenParticipantJoined,
+    hiddenParticipantLeft,
     localParticipantConnectionStatusChanged,
     localParticipantRoleChanged,
     MAX_DISPLAY_NAME_LENGTH,
@@ -1654,10 +1656,13 @@ export default {
         room.on(JitsiConferenceEvents.PARTCIPANT_FEATURES_CHANGED,
             user => APP.UI.onUserFeaturesChanged(user));
         room.on(JitsiConferenceEvents.USER_JOINED, (id, user) => {
+            const displayName = user.getDisplayName();
+
             if (user.isHidden()) {
+                APP.store.dispatch(hiddenParticipantJoined(id, displayName));
+
                 return;
             }
-            const displayName = user.getDisplayName();
 
             APP.store.dispatch(participantJoined({
                 botType: user.getBotType(),
@@ -1682,8 +1687,11 @@ export default {
 
         room.on(JitsiConferenceEvents.USER_LEFT, (id, user) => {
             if (user.isHidden()) {
+                APP.store.dispatch(hiddenParticipantLeft(id));
+
                 return;
             }
+
             APP.store.dispatch(participantLeft(id, room));
             logger.log('USER %s LEFT', id, user);
             APP.API.notifyUserLeft(id);
diff --git a/config.js b/config.js
index 7298c7283cab..916c3bdd6c39 100644
--- a/config.js
+++ b/config.js
@@ -175,6 +175,10 @@ var config = {
     // Whether to enable live streaming or not.
     // liveStreamingEnabled: false,
 
+    // Transcription (in interface_config,
+    // subtitles and buttons can be configured)
+    transcribingEnabled: false,
+
     // Misc
 
     // Default value for the channel "last N" attribute. -1 for unlimited.
diff --git a/css/_font.scss b/css/_font.scss
index cbff4d7fd880..2a116977fdf2 100644
--- a/css/_font.scss
+++ b/css/_font.scss
@@ -24,6 +24,7 @@
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
 }
+
 .icon-arrow_back:before {
   content: "\e5c4";
 }
@@ -216,3 +217,6 @@
 .icon-tiles-one:before {
   content: "\e92f";
 }
+.icon-closed_caption:before {
+    content: "\e930";
+}
diff --git a/fonts/jitsi.eot b/fonts/jitsi.eot
index 3a552231b758..eb3b84adcf43 100755
Binary files a/fonts/jitsi.eot and b/fonts/jitsi.eot differ
diff --git a/fonts/jitsi.svg b/fonts/jitsi.svg
index a41f5e24c31a..c1a0e2806185 100755
--- a/fonts/jitsi.svg
+++ b/fonts/jitsi.svg
@@ -74,4 +74,5 @@
 <glyph unicode="&#xe92d;" glyph-name="speaker" d="M0 512c0-282.795 229.205-512 512-512s512 229.205 512 512c0 282.795-229.205 512-512 512s-512-229.205-512-512zM525.005 759.362c-20.475 24.944-16.326 61.342 9.268 81.297s62.94 15.911 83.416-9.033c16.036-19.536 38.593-52.97 60.894-97.797 81.621-164.065 89.461-340.992-26.857-506.352-8.384-11.919-17.386-23.69-27.012-35.307-20.593-24.851-57.959-28.727-83.458-8.657s-29.476 56.487-8.882 81.338c7.686 9.275 14.833 18.621 21.455 28.035 88.66 126.041 82.71 260.306 17.953 390.475-10.599 21.305-21.94 40.51-33.198 57.196-6.515 9.657-11.322 16.057-13.578 18.805zM353.479 647.46c-19.353 24.679-15.129 60.448 9.434 79.893s60.164 15.2 79.517-9.479c9.635-12.287 22.577-32.644 35.209-60.034 50.35-109.176 50.35-231.689-33.639-349.612-18.198-25.551-53.566-31.441-78.997-13.157s-31.294 53.819-13.096 79.37c57.564 80.822 57.564 160.581 22.983 235.565-8.601 18.65-16.892 31.691-21.412 37.455z" />
 <glyph unicode="&#xe92e;" glyph-name="tiles-many" d="M113.778 1024h227.556c62.838 0 113.778-50.94 113.778-113.778v-227.556c0-62.838-50.94-113.778-113.778-113.778h-227.556c-62.838 0-113.778 50.94-113.778 113.778v227.556c0 62.838 50.94 113.778 113.778 113.778zM170.667 910.222c-31.419 0-56.889-25.47-56.889-56.889v-113.778c0-31.419 25.47-56.889 56.889-56.889h113.778c31.419 0 56.889 25.47 56.889 56.889v113.778c0 31.419-25.47 56.889-56.889 56.889h-113.778zM113.778 455.111h227.556c62.838 0 113.778-50.94 113.778-113.778v-227.556c0-62.838-50.94-113.778-113.778-113.778h-227.556c-62.838 0-113.778 50.94-113.778 113.778v227.556c0 62.838 50.94 113.778 113.778 113.778zM170.667 341.333c-31.419 0-56.889-25.47-56.889-56.889v-113.778c0-31.419 25.47-56.889 56.889-56.889h113.778c31.419 0 56.889 25.47 56.889 56.889v113.778c0 31.419-25.47 56.889-56.889 56.889h-113.778zM682.667 1024h227.556c62.838 0 113.778-50.94 113.778-113.778v-227.556c0-62.838-50.94-113.778-113.778-113.778h-227.556c-62.838 0-113.778 50.94-113.778 113.778v227.556c0 62.838 50.94 113.778 113.778 113.778zM739.556 910.222c-31.419 0-56.889-25.47-56.889-56.889v-113.778c0-31.419 25.47-56.889 56.889-56.889h113.778c31.419 0 56.889 25.47 56.889 56.889v113.778c0 31.419-25.47 56.889-56.889 56.889h-113.778zM682.667 455.111h227.556c62.838 0 113.778-50.94 113.778-113.778v-227.556c0-62.838-50.94-113.778-113.778-113.778h-227.556c-62.838 0-113.778 50.94-113.778 113.778v227.556c0 62.838 50.94 113.778 113.778 113.778zM739.556 341.333c-31.419 0-56.889-25.47-56.889-56.889v-113.778c0-31.419 25.47-56.889 56.889-56.889h113.778c31.419 0 56.889 25.47 56.889 56.889v113.778c0 31.419-25.47 56.889-56.889 56.889h-113.778z" />
 <glyph unicode="&#xe92f;" glyph-name="tiles-one" d="M170.667 810.667h682.667c47.128 0 85.333-38.205 85.333-85.333v-426.667c0-47.128-38.205-85.333-85.333-85.333h-682.667c-47.128 0-85.333 38.205-85.333 85.333v426.667c0 47.128 38.205 85.333 85.333 85.333zM213.333 725.333c-23.564 0-42.667-19.103-42.667-42.667v-341.333c0-23.564 19.103-42.667 42.667-42.667h597.333c23.564 0 42.667 19.103 42.667 42.667v341.333c0 23.564-19.103 42.667-42.667 42.667h-597.333z" />
+<glyph unicode="&#xe930;" glyph-name="closed_caption" d="M768 554v44c0 24-18 42-42 42h-128c-24 0-44-18-44-42v-172c0-24 20-42 44-42h128c24 0 42 18 42 42v44h-64v-22h-86v128h86v-22h64zM470 554v44c0 24-20 42-44 42h-128c-24 0-42-18-42-42v-172c0-24 18-42 42-42h128c24 0 44 18 44 42v44h-64v-22h-86v128h86v-22h64zM810 854c46 0 86-40 86-86v-512c0-46-40-86-86-86h-596c-48 0-86 40-86 86v512c0 46 38 86 86 86h596z" />
 </font></defs></svg>
\ No newline at end of file
diff --git a/fonts/jitsi.ttf b/fonts/jitsi.ttf
index 48edd49102c9..bfe9c206b21a 100755
Binary files a/fonts/jitsi.ttf and b/fonts/jitsi.ttf differ
diff --git a/fonts/jitsi.woff b/fonts/jitsi.woff
index ffd9ee36e0c0..54d641c80491 100755
Binary files a/fonts/jitsi.woff and b/fonts/jitsi.woff differ
diff --git a/fonts/selection.json b/fonts/selection.json
index 4745427630d1..9a1953f4a4ff 100755
--- a/fonts/selection.json
+++ b/fonts/selection.json
@@ -1,6 +1,35 @@
 {
   "IcoMoonType": "selection",
   "icons": [
+    {
+      "icon": {
+        "paths": [
+          "M768 470v-44c0-24-18-42-42-42h-128c-24 0-44 18-44 42v172c0 24 20 42 44 42h128c24 0 42-18 42-42v-44h-64v22h-86v-128h86v22h64zM470 470v-44c0-24-20-42-44-42h-128c-24 0-42 18-42 42v172c0 24 18 42 42 42h128c24 0 44-18 44-42v-44h-64v22h-86v-128h86v22h64zM810 170c46 0 86 40 86 86v512c0 46-40 86-86 86h-596c-48 0-86-40-86-86v-512c0-46 38-86 86-86h596z"
+        ],
+        "attrs": [
+          {}
+        ],
+        "isMulticolor": false,
+        "isMulticolor2": false,
+        "tags": [
+          "closed_caption"
+        ],
+        "grid": 24
+      },
+      "attrs": [
+        {}
+      ],
+      "properties": {
+        "order": 1,
+        "id": 0,
+        "prevSize": 24,
+        "code": 59696,
+        "name": "closed_caption"
+      },
+      "setIdx": 0,
+      "setId": 2,
+      "iconIdx": 0
+    },
     {
       "icon": {
         "paths": [
@@ -23,10 +52,10 @@
         "order": 1377,
         "id": 1065,
         "name": "tiles-many",
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59694
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
       "iconIdx": 0
     },
@@ -52,10 +81,10 @@
         "order": 1378,
         "id": 1064,
         "name": "tiles-one",
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59695
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
       "iconIdx": 1
     },
@@ -78,13 +107,13 @@
         "ligatures": "clear, close",
         "id": 157,
         "order": 1313,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58829,
         "name": "close"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 50
+      "iconIdx": 2
     },
     {
       "icon": {
@@ -105,13 +134,13 @@
         "ligatures": "launch, open_in_new",
         "id": 1047,
         "order": 1314,
-        "prevSize": 32,
+        "prevSize": 24,
         "name": "open_in_new",
         "code": 59550
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 51
+      "iconIdx": 3
     },
     {
       "icon": {
@@ -132,13 +161,13 @@
         "ligatures": "history, restore",
         "id": 1048,
         "order": 1315,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59571,
         "name": "restore"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 52
+      "iconIdx": 4
     },
     {
       "icon": {
@@ -159,13 +188,13 @@
         "ligatures": "chevron_right, navigate_next",
         "id": 1049,
         "order": 1316,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58377,
         "name": "navigate_next"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 53
+      "iconIdx": 5
     },
     {
       "icon": {
@@ -186,13 +215,13 @@
         "ligatures": "menu",
         "id": 1050,
         "order": 1317,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58834,
         "name": "menu"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 54
+      "iconIdx": 6
     },
     {
       "icon": {
@@ -213,13 +242,13 @@
         "ligatures": "arrow_back",
         "id": 1051,
         "order": 1318,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58820,
         "name": "arrow_back"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 55
+      "iconIdx": 7
     },
     {
       "icon": {
@@ -240,13 +269,13 @@
         "ligatures": "chevron_left, navigate_before",
         "id": 1052,
         "order": 1319,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58376,
         "name": "navigate_before"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 56
+      "iconIdx": 8
     },
     {
       "icon": {
@@ -267,13 +296,13 @@
         "ligatures": "public",
         "id": 1053,
         "order": 1320,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59403,
         "name": "public"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 57
+      "iconIdx": 9
     },
     {
       "icon": {
@@ -294,13 +323,13 @@
         "ligatures": "event_note",
         "id": 1054,
         "order": 1321,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58902,
         "name": "event_note"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 58
+      "iconIdx": 10
     },
     {
       "icon": {
@@ -321,13 +350,13 @@
         "ligatures": "timer",
         "id": 1055,
         "order": 1322,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58405,
         "name": "timer"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 59
+      "iconIdx": 11
     },
     {
       "icon": {
@@ -348,13 +377,13 @@
         "ligatures": "bluetooth_audio, bluetooth_searching",
         "id": 1056,
         "order": 1323,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 57770,
         "name": "bluetooth"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 60
+      "iconIdx": 12
     },
     {
       "icon": {
@@ -375,13 +404,13 @@
         "ligatures": "headset",
         "id": 1057,
         "order": 1324,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58128,
         "name": "headset"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 61
+      "iconIdx": 13
     },
     {
       "icon": {
@@ -402,13 +431,13 @@
         "ligatures": "phone_in_talk",
         "id": 1058,
         "order": 1325,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58909,
         "name": "phone-talk"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 62
+      "iconIdx": 14
     },
     {
       "icon": {
@@ -429,13 +458,13 @@
         "ligatures": "more_vert",
         "id": 1059,
         "order": 1326,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58836,
         "name": "thumb-menu"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 63
+      "iconIdx": 15
     },
     {
       "icon": {
@@ -459,12 +488,12 @@
         "order": 1327,
         "id": 1060,
         "name": "ninja",
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59657
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 64
+      "iconIdx": 16
     },
     {
       "icon": {
@@ -485,13 +514,13 @@
         "ligatures": "call, local_phone, phone",
         "id": 1061,
         "order": 1328,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 57549,
         "name": "phone"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 65
+      "iconIdx": 17
     },
     {
       "icon": {
@@ -512,13 +541,13 @@
         "ligatures": "add",
         "id": 1062,
         "order": 1329,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 57669,
         "name": "add"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 66
+      "iconIdx": 18
     },
     {
       "icon": {
@@ -545,9 +574,9 @@
         "prevSize": 32,
         "code": 59693
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 2
+      "iconIdx": 19
     },
     {
       "icon": {
@@ -574,9 +603,9 @@
         "prevSize": 32,
         "code": 59692
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 3
+      "iconIdx": 20
     },
     {
       "icon": {
@@ -603,9 +632,9 @@
         "prevSize": 32,
         "code": 59691
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 4
+      "iconIdx": 21
     },
     {
       "icon": {
@@ -635,9 +664,9 @@
         "prevSize": 32,
         "code": 59690
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 5
+      "iconIdx": 22
     },
     {
       "icon": {
@@ -664,9 +693,9 @@
         "prevSize": 32,
         "code": 59648
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 6
+      "iconIdx": 23
     },
     {
       "icon": {
@@ -693,9 +722,9 @@
         "prevSize": 32,
         "code": 59687
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 7
+      "iconIdx": 24
     },
     {
       "icon": {
@@ -722,9 +751,9 @@
         "prevSize": 32,
         "code": 59688
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 8
+      "iconIdx": 25
     },
     {
       "icon": {
@@ -751,9 +780,9 @@
         "prevSize": 32,
         "code": 59689
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 9
+      "iconIdx": 26
     },
     {
       "icon": {
@@ -780,9 +809,9 @@
         "prevSize": 32,
         "code": 59686
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 10
+      "iconIdx": 27
     },
     {
       "icon": {
@@ -809,9 +838,9 @@
         "prevSize": 32,
         "code": 59682
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 11
+      "iconIdx": 28
     },
     {
       "icon": {
@@ -838,9 +867,9 @@
         "prevSize": 32,
         "code": 59651
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 12
+      "iconIdx": 29
     },
     {
       "icon": {
@@ -867,9 +896,9 @@
         "prevSize": 32,
         "code": 59677
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 13
+      "iconIdx": 30
     },
     {
       "icon": {
@@ -896,9 +925,9 @@
         "prevSize": 32,
         "code": 59676
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 14
+      "iconIdx": 31
     },
     {
       "icon": {
@@ -922,9 +951,9 @@
         "code": 59649,
         "name": "avatar"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 15
+      "iconIdx": 32
     },
     {
       "icon": {
@@ -948,9 +977,9 @@
         "code": 59653,
         "name": "hangup"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 16
+      "iconIdx": 33
     },
     {
       "icon": {
@@ -974,9 +1003,9 @@
         "code": 59654,
         "name": "chat"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 17
+      "iconIdx": 34
     },
     {
       "icon": {
@@ -1000,9 +1029,9 @@
         "code": 59650,
         "name": "download"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 18
+      "iconIdx": 35
     },
     {
       "icon": {
@@ -1026,9 +1055,9 @@
         "code": 59655,
         "name": "edit"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 19
+      "iconIdx": 36
     },
     {
       "icon": {
@@ -1052,9 +1081,9 @@
         "code": 59656,
         "name": "share-doc"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 20
+      "iconIdx": 37
     },
     {
       "icon": {
@@ -1078,9 +1107,9 @@
         "code": 59652,
         "name": "kick"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 21
+      "iconIdx": 38
     },
     {
       "icon": {
@@ -1104,9 +1133,9 @@
         "code": 59679,
         "name": "menu-up"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 22
+      "iconIdx": 39
     },
     {
       "icon": {
@@ -1130,9 +1159,9 @@
         "code": 59680,
         "name": "menu-down"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 23
+      "iconIdx": 40
     },
     {
       "icon": {
@@ -1156,9 +1185,9 @@
         "code": 59659,
         "name": "full-screen"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 24
+      "iconIdx": 41
     },
     {
       "icon": {
@@ -1182,9 +1211,9 @@
         "code": 59660,
         "name": "exit-full-screen"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 25
+      "iconIdx": 42
     },
     {
       "icon": {
@@ -1208,9 +1237,9 @@
         "code": 59658,
         "name": "star-full"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 26
+      "iconIdx": 43
     },
     {
       "icon": {
@@ -1234,9 +1263,9 @@
         "code": 59661,
         "name": "security"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 27
+      "iconIdx": 44
     },
     {
       "icon": {
@@ -1260,9 +1289,9 @@
         "code": 59662,
         "name": "security-locked"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 28
+      "iconIdx": 45
     },
     {
       "icon": {
@@ -1286,9 +1315,9 @@
         "code": 59663,
         "name": "reload"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 29
+      "iconIdx": 46
     },
     {
       "icon": {
@@ -1312,9 +1341,9 @@
         "code": 59664,
         "name": "microphone"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 30
+      "iconIdx": 47
     },
     {
       "icon": {
@@ -1338,9 +1367,9 @@
         "code": 59665,
         "name": "mic-empty"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 31
+      "iconIdx": 48
     },
     {
       "icon": {
@@ -1364,9 +1393,9 @@
         "code": 59666,
         "name": "mic-disabled"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 32
+      "iconIdx": 49
     },
     {
       "icon": {
@@ -1390,9 +1419,9 @@
         "code": 59678,
         "name": "raised-hand"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 33
+      "iconIdx": 50
     },
     {
       "icon": {
@@ -1416,9 +1445,9 @@
         "code": 59675,
         "name": "contactList"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 34
+      "iconIdx": 51
     },
     {
       "icon": {
@@ -1442,9 +1471,9 @@
         "code": 59667,
         "name": "link"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 35
+      "iconIdx": 52
     },
     {
       "icon": {
@@ -1468,9 +1497,9 @@
         "code": 59668,
         "name": "shared-video"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 36
+      "iconIdx": 53
     },
     {
       "icon": {
@@ -1494,9 +1523,9 @@
         "code": 59669,
         "name": "settings"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 37
+      "iconIdx": 54
     },
     {
       "icon": {
@@ -1520,9 +1549,9 @@
         "code": 59670,
         "name": "star"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 38
+      "iconIdx": 55
     },
     {
       "icon": {
@@ -1546,9 +1575,9 @@
         "code": 59681,
         "name": "switch-camera"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 39
+      "iconIdx": 56
     },
     {
       "icon": {
@@ -1572,9 +1601,9 @@
         "code": 59671,
         "name": "share-desktop"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 40
+      "iconIdx": 57
     },
     {
       "icon": {
@@ -1598,9 +1627,9 @@
         "code": 59672,
         "name": "camera"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 41
+      "iconIdx": 58
     },
     {
       "icon": {
@@ -1624,9 +1653,9 @@
         "code": 59673,
         "name": "camera-disabled"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 42
+      "iconIdx": 59
     },
     {
       "icon": {
@@ -1650,9 +1679,9 @@
         "code": 59674,
         "name": "volume"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 43
+      "iconIdx": 60
     },
     {
       "icon": {
@@ -1679,9 +1708,9 @@
         "name": "recDisable",
         "ligatures": ""
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 44
+      "iconIdx": 61
     },
     {
       "icon": {
@@ -1709,9 +1738,9 @@
         "name": "recEnable",
         "ligatures": ""
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 45
+      "iconIdx": 62
     },
     {
       "icon": {
@@ -1739,9 +1768,9 @@
         "name": "presentation",
         "ligatures": ""
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 46
+      "iconIdx": 63
     },
     {
       "icon": {
@@ -1765,9 +1794,9 @@
         "code": 59685,
         "name": "dialpad"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 47
+      "iconIdx": 64
     },
     {
       "icon": {
@@ -1791,9 +1820,9 @@
         "code": 59683,
         "name": "visibility"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 48
+      "iconIdx": 65
     },
     {
       "icon": {
@@ -1817,9 +1846,9 @@
         "code": 59684,
         "name": "visibility-off"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 49
+      "iconIdx": 66
     }
   ],
   "height": 1024,
diff --git a/interface_config.js b/interface_config.js
index 2ac95586ead9..a7617a4b7dcf 100644
--- a/interface_config.js
+++ b/interface_config.js
@@ -45,10 +45,10 @@ var interfaceConfig = {
      * jwt.
      */
     TOOLBAR_BUTTONS: [
-        'microphone', 'camera', 'desktop', 'fullscreen', 'fodeviceselection', 'hangup',
-        'profile', 'info', 'chat', 'recording', 'livestreaming', 'etherpad',
-        'sharedvideo', 'settings', 'raisehand', 'videoquality', 'filmstrip',
-        'invite', 'feedback', 'stats', 'shortcuts'
+        'microphone', 'camera', 'closedcaptions', 'desktop', 'fullscreen',
+        'fodeviceselection', 'hangup', 'profile', 'info', 'chat', 'recording',
+        'livestreaming', 'etherpad', 'sharedvideo', 'settings', 'raisehand',
+        'videoquality', 'filmstrip', 'invite', 'feedback', 'stats', 'shortcuts'
     ],
 
     SETTINGS_SECTIONS: [ 'devices', 'language', 'moderator', 'profile' ],
diff --git a/lang/main.json b/lang/main.json
index d8fef9abb046..60d2f4ff430f 100644
--- a/lang/main.json
+++ b/lang/main.json
@@ -81,6 +81,7 @@
             "audioRoute": "Select the sound device",
             "callQuality": "Manage call quality",
             "chat": "Toggle chat window",
+            "cc": "Toggle subtitles",
             "document": "Toggle shared document",
             "feedback": "Leave feedback",
             "fullScreen": "Toggle full screen",
@@ -381,7 +382,8 @@
         "shareYourScreenDisabled": "Screen sharing disabled.",
         "shareYourScreenDisabledForGuest": "Guests can't screen share.",
         "yourEntireScreen": "Your entire screen",
-        "applicationWindow": "Application window"
+        "applicationWindow": "Application window",
+        "transcribing": "Transcribing"
     },
     "email":
     {
@@ -448,6 +450,16 @@
         "unavailable": "Oops! The __serviceName__ is currently unavailable. We're working on resolving the issue. Please try again later.",
         "unavailableTitle": "Recording unavailable"
     },
+    "transcribing":
+    {
+        "pending" : "Preparing to transcribe the meeting...",
+        "off" : "Transcribing stopped",
+        "error": "Transcribing failed. Please try again.",
+        "failedToStart": "Transcribing failed to start",
+        "tr": "TR",
+        "labelToolTip": "The meeting is being transcribed",
+        "ccButtonTooltip": "Start / Stop showing subtitles"
+    },
     "liveStreaming":
     {
         "busy": "We're working on freeing streaming resources. Please try again in a few minutes.",
diff --git a/react/features/base/font-icons/jitsi.json b/react/features/base/font-icons/jitsi.json
index 4745427630d1..9a1953f4a4ff 100755
--- a/react/features/base/font-icons/jitsi.json
+++ b/react/features/base/font-icons/jitsi.json
@@ -1,6 +1,35 @@
 {
   "IcoMoonType": "selection",
   "icons": [
+    {
+      "icon": {
+        "paths": [
+          "M768 470v-44c0-24-18-42-42-42h-128c-24 0-44 18-44 42v172c0 24 20 42 44 42h128c24 0 42-18 42-42v-44h-64v22h-86v-128h86v22h64zM470 470v-44c0-24-20-42-44-42h-128c-24 0-42 18-42 42v172c0 24 18 42 42 42h128c24 0 44-18 44-42v-44h-64v22h-86v-128h86v22h64zM810 170c46 0 86 40 86 86v512c0 46-40 86-86 86h-596c-48 0-86-40-86-86v-512c0-46 38-86 86-86h596z"
+        ],
+        "attrs": [
+          {}
+        ],
+        "isMulticolor": false,
+        "isMulticolor2": false,
+        "tags": [
+          "closed_caption"
+        ],
+        "grid": 24
+      },
+      "attrs": [
+        {}
+      ],
+      "properties": {
+        "order": 1,
+        "id": 0,
+        "prevSize": 24,
+        "code": 59696,
+        "name": "closed_caption"
+      },
+      "setIdx": 0,
+      "setId": 2,
+      "iconIdx": 0
+    },
     {
       "icon": {
         "paths": [
@@ -23,10 +52,10 @@
         "order": 1377,
         "id": 1065,
         "name": "tiles-many",
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59694
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
       "iconIdx": 0
     },
@@ -52,10 +81,10 @@
         "order": 1378,
         "id": 1064,
         "name": "tiles-one",
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59695
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
       "iconIdx": 1
     },
@@ -78,13 +107,13 @@
         "ligatures": "clear, close",
         "id": 157,
         "order": 1313,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58829,
         "name": "close"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 50
+      "iconIdx": 2
     },
     {
       "icon": {
@@ -105,13 +134,13 @@
         "ligatures": "launch, open_in_new",
         "id": 1047,
         "order": 1314,
-        "prevSize": 32,
+        "prevSize": 24,
         "name": "open_in_new",
         "code": 59550
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 51
+      "iconIdx": 3
     },
     {
       "icon": {
@@ -132,13 +161,13 @@
         "ligatures": "history, restore",
         "id": 1048,
         "order": 1315,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59571,
         "name": "restore"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 52
+      "iconIdx": 4
     },
     {
       "icon": {
@@ -159,13 +188,13 @@
         "ligatures": "chevron_right, navigate_next",
         "id": 1049,
         "order": 1316,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58377,
         "name": "navigate_next"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 53
+      "iconIdx": 5
     },
     {
       "icon": {
@@ -186,13 +215,13 @@
         "ligatures": "menu",
         "id": 1050,
         "order": 1317,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58834,
         "name": "menu"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 54
+      "iconIdx": 6
     },
     {
       "icon": {
@@ -213,13 +242,13 @@
         "ligatures": "arrow_back",
         "id": 1051,
         "order": 1318,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58820,
         "name": "arrow_back"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 55
+      "iconIdx": 7
     },
     {
       "icon": {
@@ -240,13 +269,13 @@
         "ligatures": "chevron_left, navigate_before",
         "id": 1052,
         "order": 1319,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58376,
         "name": "navigate_before"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 56
+      "iconIdx": 8
     },
     {
       "icon": {
@@ -267,13 +296,13 @@
         "ligatures": "public",
         "id": 1053,
         "order": 1320,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59403,
         "name": "public"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 57
+      "iconIdx": 9
     },
     {
       "icon": {
@@ -294,13 +323,13 @@
         "ligatures": "event_note",
         "id": 1054,
         "order": 1321,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58902,
         "name": "event_note"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 58
+      "iconIdx": 10
     },
     {
       "icon": {
@@ -321,13 +350,13 @@
         "ligatures": "timer",
         "id": 1055,
         "order": 1322,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58405,
         "name": "timer"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 59
+      "iconIdx": 11
     },
     {
       "icon": {
@@ -348,13 +377,13 @@
         "ligatures": "bluetooth_audio, bluetooth_searching",
         "id": 1056,
         "order": 1323,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 57770,
         "name": "bluetooth"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 60
+      "iconIdx": 12
     },
     {
       "icon": {
@@ -375,13 +404,13 @@
         "ligatures": "headset",
         "id": 1057,
         "order": 1324,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58128,
         "name": "headset"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 61
+      "iconIdx": 13
     },
     {
       "icon": {
@@ -402,13 +431,13 @@
         "ligatures": "phone_in_talk",
         "id": 1058,
         "order": 1325,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58909,
         "name": "phone-talk"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 62
+      "iconIdx": 14
     },
     {
       "icon": {
@@ -429,13 +458,13 @@
         "ligatures": "more_vert",
         "id": 1059,
         "order": 1326,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 58836,
         "name": "thumb-menu"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 63
+      "iconIdx": 15
     },
     {
       "icon": {
@@ -459,12 +488,12 @@
         "order": 1327,
         "id": 1060,
         "name": "ninja",
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 59657
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 64
+      "iconIdx": 16
     },
     {
       "icon": {
@@ -485,13 +514,13 @@
         "ligatures": "call, local_phone, phone",
         "id": 1061,
         "order": 1328,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 57549,
         "name": "phone"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 65
+      "iconIdx": 17
     },
     {
       "icon": {
@@ -512,13 +541,13 @@
         "ligatures": "add",
         "id": 1062,
         "order": 1329,
-        "prevSize": 32,
+        "prevSize": 24,
         "code": 57669,
         "name": "add"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 66
+      "iconIdx": 18
     },
     {
       "icon": {
@@ -545,9 +574,9 @@
         "prevSize": 32,
         "code": 59693
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 2
+      "iconIdx": 19
     },
     {
       "icon": {
@@ -574,9 +603,9 @@
         "prevSize": 32,
         "code": 59692
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 3
+      "iconIdx": 20
     },
     {
       "icon": {
@@ -603,9 +632,9 @@
         "prevSize": 32,
         "code": 59691
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 4
+      "iconIdx": 21
     },
     {
       "icon": {
@@ -635,9 +664,9 @@
         "prevSize": 32,
         "code": 59690
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 5
+      "iconIdx": 22
     },
     {
       "icon": {
@@ -664,9 +693,9 @@
         "prevSize": 32,
         "code": 59648
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 6
+      "iconIdx": 23
     },
     {
       "icon": {
@@ -693,9 +722,9 @@
         "prevSize": 32,
         "code": 59687
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 7
+      "iconIdx": 24
     },
     {
       "icon": {
@@ -722,9 +751,9 @@
         "prevSize": 32,
         "code": 59688
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 8
+      "iconIdx": 25
     },
     {
       "icon": {
@@ -751,9 +780,9 @@
         "prevSize": 32,
         "code": 59689
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 9
+      "iconIdx": 26
     },
     {
       "icon": {
@@ -780,9 +809,9 @@
         "prevSize": 32,
         "code": 59686
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 10
+      "iconIdx": 27
     },
     {
       "icon": {
@@ -809,9 +838,9 @@
         "prevSize": 32,
         "code": 59682
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 11
+      "iconIdx": 28
     },
     {
       "icon": {
@@ -838,9 +867,9 @@
         "prevSize": 32,
         "code": 59651
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 12
+      "iconIdx": 29
     },
     {
       "icon": {
@@ -867,9 +896,9 @@
         "prevSize": 32,
         "code": 59677
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 13
+      "iconIdx": 30
     },
     {
       "icon": {
@@ -896,9 +925,9 @@
         "prevSize": 32,
         "code": 59676
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 14
+      "iconIdx": 31
     },
     {
       "icon": {
@@ -922,9 +951,9 @@
         "code": 59649,
         "name": "avatar"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 15
+      "iconIdx": 32
     },
     {
       "icon": {
@@ -948,9 +977,9 @@
         "code": 59653,
         "name": "hangup"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 16
+      "iconIdx": 33
     },
     {
       "icon": {
@@ -974,9 +1003,9 @@
         "code": 59654,
         "name": "chat"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 17
+      "iconIdx": 34
     },
     {
       "icon": {
@@ -1000,9 +1029,9 @@
         "code": 59650,
         "name": "download"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 18
+      "iconIdx": 35
     },
     {
       "icon": {
@@ -1026,9 +1055,9 @@
         "code": 59655,
         "name": "edit"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 19
+      "iconIdx": 36
     },
     {
       "icon": {
@@ -1052,9 +1081,9 @@
         "code": 59656,
         "name": "share-doc"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 20
+      "iconIdx": 37
     },
     {
       "icon": {
@@ -1078,9 +1107,9 @@
         "code": 59652,
         "name": "kick"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 21
+      "iconIdx": 38
     },
     {
       "icon": {
@@ -1104,9 +1133,9 @@
         "code": 59679,
         "name": "menu-up"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 22
+      "iconIdx": 39
     },
     {
       "icon": {
@@ -1130,9 +1159,9 @@
         "code": 59680,
         "name": "menu-down"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 23
+      "iconIdx": 40
     },
     {
       "icon": {
@@ -1156,9 +1185,9 @@
         "code": 59659,
         "name": "full-screen"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 24
+      "iconIdx": 41
     },
     {
       "icon": {
@@ -1182,9 +1211,9 @@
         "code": 59660,
         "name": "exit-full-screen"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 25
+      "iconIdx": 42
     },
     {
       "icon": {
@@ -1208,9 +1237,9 @@
         "code": 59658,
         "name": "star-full"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 26
+      "iconIdx": 43
     },
     {
       "icon": {
@@ -1234,9 +1263,9 @@
         "code": 59661,
         "name": "security"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 27
+      "iconIdx": 44
     },
     {
       "icon": {
@@ -1260,9 +1289,9 @@
         "code": 59662,
         "name": "security-locked"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 28
+      "iconIdx": 45
     },
     {
       "icon": {
@@ -1286,9 +1315,9 @@
         "code": 59663,
         "name": "reload"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 29
+      "iconIdx": 46
     },
     {
       "icon": {
@@ -1312,9 +1341,9 @@
         "code": 59664,
         "name": "microphone"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 30
+      "iconIdx": 47
     },
     {
       "icon": {
@@ -1338,9 +1367,9 @@
         "code": 59665,
         "name": "mic-empty"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 31
+      "iconIdx": 48
     },
     {
       "icon": {
@@ -1364,9 +1393,9 @@
         "code": 59666,
         "name": "mic-disabled"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 32
+      "iconIdx": 49
     },
     {
       "icon": {
@@ -1390,9 +1419,9 @@
         "code": 59678,
         "name": "raised-hand"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 33
+      "iconIdx": 50
     },
     {
       "icon": {
@@ -1416,9 +1445,9 @@
         "code": 59675,
         "name": "contactList"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 34
+      "iconIdx": 51
     },
     {
       "icon": {
@@ -1442,9 +1471,9 @@
         "code": 59667,
         "name": "link"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 35
+      "iconIdx": 52
     },
     {
       "icon": {
@@ -1468,9 +1497,9 @@
         "code": 59668,
         "name": "shared-video"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 36
+      "iconIdx": 53
     },
     {
       "icon": {
@@ -1494,9 +1523,9 @@
         "code": 59669,
         "name": "settings"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 37
+      "iconIdx": 54
     },
     {
       "icon": {
@@ -1520,9 +1549,9 @@
         "code": 59670,
         "name": "star"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 38
+      "iconIdx": 55
     },
     {
       "icon": {
@@ -1546,9 +1575,9 @@
         "code": 59681,
         "name": "switch-camera"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 39
+      "iconIdx": 56
     },
     {
       "icon": {
@@ -1572,9 +1601,9 @@
         "code": 59671,
         "name": "share-desktop"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 40
+      "iconIdx": 57
     },
     {
       "icon": {
@@ -1598,9 +1627,9 @@
         "code": 59672,
         "name": "camera"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 41
+      "iconIdx": 58
     },
     {
       "icon": {
@@ -1624,9 +1653,9 @@
         "code": 59673,
         "name": "camera-disabled"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 42
+      "iconIdx": 59
     },
     {
       "icon": {
@@ -1650,9 +1679,9 @@
         "code": 59674,
         "name": "volume"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 43
+      "iconIdx": 60
     },
     {
       "icon": {
@@ -1679,9 +1708,9 @@
         "name": "recDisable",
         "ligatures": ""
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 44
+      "iconIdx": 61
     },
     {
       "icon": {
@@ -1709,9 +1738,9 @@
         "name": "recEnable",
         "ligatures": ""
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 45
+      "iconIdx": 62
     },
     {
       "icon": {
@@ -1739,9 +1768,9 @@
         "name": "presentation",
         "ligatures": ""
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 46
+      "iconIdx": 63
     },
     {
       "icon": {
@@ -1765,9 +1794,9 @@
         "code": 59685,
         "name": "dialpad"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 47
+      "iconIdx": 64
     },
     {
       "icon": {
@@ -1791,9 +1820,9 @@
         "code": 59683,
         "name": "visibility"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 48
+      "iconIdx": 65
     },
     {
       "icon": {
@@ -1817,9 +1846,9 @@
         "code": 59684,
         "name": "visibility-off"
       },
-      "setIdx": 0,
+      "setIdx": 1,
       "setId": 1,
-      "iconIdx": 49
+      "iconIdx": 66
     }
   ],
   "height": 1024,
diff --git a/react/features/base/participants/actionTypes.js b/react/features/base/participants/actionTypes.js
index 533727c51236..8675231c9ff3 100644
--- a/react/features/base/participants/actionTypes.js
+++ b/react/features/base/participants/actionTypes.js
@@ -98,3 +98,25 @@ export const PARTICIPANT_UPDATED = Symbol('PARTICIPANT_UPDATED');
  * }
  */
 export const PIN_PARTICIPANT = Symbol('PIN_PARTICIPANT');
+
+/**
+ * Action to signal that a hidden participant has joined.
+ *
+ * {
+ *     type: HIDDEN_PARTICIPANT_JOINED,
+ *     participant: Participant
+ * }
+ */
+export const HIDDEN_PARTICIPANT_JOINED = Symbol('HIDDEN_PARTICIPANT_JOINED');
+
+/**
+ * Action to handle case when hidden participant leaves.
+ *
+ * {
+ *     type: PARTICIPANT_LEFT,
+ *     participant: {
+ *         id: string
+ *     }
+ * }
+ */
+export const HIDDEN_PARTICIPANT_LEFT = Symbol('HIDDEN_PARTICIPANT_LEFT');
diff --git a/react/features/base/participants/actions.js b/react/features/base/participants/actions.js
index 137a4646dc52..3d96fe983574 100644
--- a/react/features/base/participants/actions.js
+++ b/react/features/base/participants/actions.js
@@ -7,6 +7,8 @@ import { showNotification } from '../../notifications';
 
 import {
     DOMINANT_SPEAKER_CHANGED,
+    HIDDEN_PARTICIPANT_JOINED,
+    HIDDEN_PARTICIPANT_LEFT,
     KICK_PARTICIPANT,
     MUTE_REMOTE_PARTICIPANT,
     PARTICIPANT_DISPLAY_NAME_CHANGED,
@@ -276,6 +278,42 @@ export function participantJoined(participant) {
     };
 }
 
+/**
+ * Action to signal that a hidden participant has joined the conference.
+ *
+ * @param {string} id - The id of the participant.
+ * @param {string} displayName - The display name, or undefined when
+ * unknown.
+ * @returns {{
+ *     type: HIDDEN_PARTICIPANT_JOINED,
+ *     displayName: string,
+ *     id: string
+ * }}
+ */
+export function hiddenParticipantJoined(id, displayName) {
+    return {
+        type: HIDDEN_PARTICIPANT_JOINED,
+        id,
+        displayName
+    };
+}
+
+/**
+ * Action to signal that a hidden participant has left the conference.
+ *
+ * @param {string} id - The id of the participant.
+ * @returns {{
+ *     type: HIDDEN_PARTICIPANT_LEFT,
+ *     id: string
+ * }}
+ */
+export function hiddenParticipantLeft(id) {
+    return {
+        type: HIDDEN_PARTICIPANT_LEFT,
+        id
+    };
+}
+
 /**
  * Action to signal that a participant has left.
  *
diff --git a/react/features/large-video/components/AbstractLabels.js b/react/features/large-video/components/AbstractLabels.js
index 206d7bb3ff32..a7a7e0ce8938 100644
--- a/react/features/large-video/components/AbstractLabels.js
+++ b/react/features/large-video/components/AbstractLabels.js
@@ -5,6 +5,7 @@ import React, { Component } from 'react';
 import { isFilmstripVisible } from '../../filmstrip';
 import { RecordingLabel } from '../../recording';
 import { VideoQualityLabel } from '../../video-quality';
+import { TranscribingLabel } from '../../transcribing/';
 
 /**
  * The type of the React {@code Component} props of {@link AbstractLabels}.
@@ -50,6 +51,18 @@ export default class AbstractLabels<P: Props, S> extends Component<P, S> {
             <VideoQualityLabel />
         );
     }
+
+    /**
+     * Renders the {@code TranscribingLabel}.
+     *
+     * @returns {React$Element}
+     * @protected
+     */
+    _renderTranscribingLabel() {
+        return (
+            <TranscribingLabel />
+        );
+    }
 }
 
 /**
diff --git a/react/features/large-video/components/Labels.web.js b/react/features/large-video/components/Labels.web.js
index 6649c3767f31..c5e5c5343129 100644
--- a/react/features/large-video/components/Labels.web.js
+++ b/react/features/large-video/components/Labels.web.js
@@ -85,6 +85,9 @@ class Labels extends AbstractLabels<Props, State> {
                     this._renderRecordingLabel(
                         JitsiRecordingConstants.mode.STREAM)
                 }
+                {
+                    this._renderTranscribingLabel()
+                }
                 {
                     this._renderVideoQualityLabel()
                 }
@@ -95,6 +98,8 @@ class Labels extends AbstractLabels<Props, State> {
     _renderRecordingLabel: string => React$Element<*>
 
     _renderVideoQualityLabel: () => React$Element<*>
+
+    _renderTranscribingLabel: () => React$Element<*>
 }
 
 export default connect(_mapStateToProps)(Labels);
diff --git a/react/features/toolbox/components/web/Toolbox.js b/react/features/toolbox/components/web/Toolbox.js
index 9a3f0668a758..f2678a563fde 100644
--- a/react/features/toolbox/components/web/Toolbox.js
+++ b/react/features/toolbox/components/web/Toolbox.js
@@ -14,7 +14,8 @@ import { translate } from '../../../base/i18n';
 import {
     getLocalParticipant,
     getParticipants,
-    participantUpdated
+    participantUpdated,
+    isLocalParticipantModerator
 } from '../../../base/participants';
 import { getLocalVideoTrack, toggleScreensharing } from '../../../base/tracks';
 import { ChatCounter } from '../../../chat';
@@ -56,6 +57,9 @@ import OverflowMenuItem from './OverflowMenuItem';
 import OverflowMenuProfileItem from './OverflowMenuProfileItem';
 import ToolbarButton from './ToolbarButton';
 import VideoMuteButton from '../VideoMuteButton';
+import {
+    ClosedCaptionButton
+} from '../../../transcribing';
 
 /**
  * The type of the React {@code Component} props of {@link Toolbox}.
@@ -144,6 +148,11 @@ type Props = {
      */
     _sharingVideo: boolean,
 
+    /**
+     * Whether or not transcribing is enabled.
+     */
+    _transcribingEnabled: boolean,
+
     /**
      * Flag showing whether toolbar is visible.
      */
@@ -302,6 +311,7 @@ class Toolbox extends Component<Props> {
             _chatOpen,
             _hideInviteButton,
             _overflowMenuVisible,
+            _transcribingEnabled,
             _raisedHand,
             _visible,
             _visibleButtons,
@@ -344,6 +354,11 @@ class Toolbox extends Component<Props> {
                                 tooltip = { t('toolbar.chat') } />
                             <ChatCounter />
                         </div> }
+                    {
+                        _transcribingEnabled
+                        && this._shouldShowButton('closedcaptions')
+                        && <ClosedCaptionButton />
+                    }
                 </div>
                 <div className = 'button-group-center'>
                     <AudioMuteButton
@@ -990,6 +1005,9 @@ function _mapStateToProps(state) {
         callStatsID,
         iAmRecorder
     } = state['features/base/config'];
+    let {
+        transcribingEnabled
+    } = state['features/base/config'];
     const sharedVideoStatus = state['features/shared-video'].status;
     const { current } = state['features/side-panel'];
     const {
@@ -1006,6 +1024,9 @@ function _mapStateToProps(state) {
 
     let desktopSharingDisabledTooltipKey;
 
+    transcribingEnabled
+        = isLocalParticipantModerator(state) && transcribingEnabled;
+
     if (state['features/base/config'].enableFeaturesBasedOnToken) {
         // we enable desktop sharing if any participant already have this
         // feature enabled
@@ -1040,6 +1061,7 @@ function _mapStateToProps(state) {
         _overflowMenuVisible: overflowMenuVisible,
         _raisedHand: localParticipant.raisedHand,
         _screensharing: localVideo && localVideo.videoType === 'desktop',
+        _transcribingEnabled: transcribingEnabled,
         _sharingVideo: sharedVideoStatus === 'playing'
             || sharedVideoStatus === 'start'
             || sharedVideoStatus === 'pause',
diff --git a/react/features/transcribing/actionTypes.js b/react/features/transcribing/actionTypes.js
new file mode 100644
index 000000000000..73a5d348c223
--- /dev/null
+++ b/react/features/transcribing/actionTypes.js
@@ -0,0 +1,78 @@
+/**
+ * The type of Redux action triggering the transcriber to join (be 'dialed' in)
+ *
+ * {
+ *     type: DIAL_TRANSCRIBER
+ * }
+ * @public
+ */
+export const DIAL_TRANSCRIBER = Symbol('DIAL_TRANSCRIBER');
+
+/**
+ * The type of Redux action triggering the transcriber to leave.
+ *
+ * {
+ *     type: STOP_TRANSCRBIBING
+ * }
+ * @public
+ */
+export const STOP_TRANSCRIBING = Symbol('STOP_TRANSCRBIBING');
+
+/**
+ * The type of Redux action triggering storage of participantId of transcriber,
+ * so that it can later be kicked
+ *
+ * {
+ *     type: TRANSCRIBER_JOINED,
+ *     participantId: String
+ * }
+ * @private
+ */
+export const _TRANSCRIBER_JOINED = Symbol('TRANSCRIBER_JOINED');
+
+/**
+ * The type of Redux action signalling that the transcriber has left
+ *
+ * {
+ *     type: TRANSCRIBER_LEFT,
+ *     participantId: String
+ * }
+ * @private
+ */
+export const _TRANSCRIBER_LEFT = Symbol('TRANSCRIBER_LEFT');
+
+/**
+ * The type of a Redux action signalling that a hidden participant has joined,
+ * which can be candidate for being a transcriber.
+ *
+ * {
+ *     type: _POTENTIAL_TRANSCRIBER_JOINED,
+ * }
+ * @private
+ */
+export const _POTENTIAL_TRANSCRIBER_JOINED
+    = Symbol('POTENTIAL_TRANSCRIBER_JOINED');
+
+/**
+ * The type of a Redux action signalling that dialing the transcriber failed.
+ *
+ * {
+ *     type: _DIAL_ERROR,
+ * }
+ * @private
+ */
+export const _DIAL_ERROR = Symbol('DIAL_ERROR');
+
+/**
+ * The type of Redux action which sets the pending transcribing notification UID
+ * to use it for when hiding the notification is necessary, or unsets it when
+ * undefined (or no param) is passed.
+ *
+ * {
+ *     type: SET_PENDING_TRANSCRIBING_NOTIFICATION_UID,
+ *     uid: ?number
+ * }
+ * @public
+ */
+export const SET_PENDING_TRANSCRIBING_NOTIFICATION_UID
+    = Symbol('SET_PENDING_TRANSCRIBING_NOTIFICATION_UID');
diff --git a/react/features/transcribing/actions.js b/react/features/transcribing/actions.js
new file mode 100644
index 000000000000..0175b90a46bf
--- /dev/null
+++ b/react/features/transcribing/actions.js
@@ -0,0 +1,189 @@
+// @flow
+
+import {
+    _DIAL_ERROR,
+    _POTENTIAL_TRANSCRIBER_JOINED,
+    _TRANSCRIBER_JOINED,
+    _TRANSCRIBER_LEFT,
+    DIAL_TRANSCRIBER,
+    SET_PENDING_TRANSCRIBING_NOTIFICATION_UID,
+    STOP_TRANSCRIBING
+} from './actionTypes';
+import {
+    hideNotification,
+    showErrorNotification,
+    showNotification
+} from '../notifications';
+
+/**
+ * Dial the transcriber into the room.
+ *
+ * @public
+ * @returns {{
+ *     type: DIAL_TRANSCRIBER
+ * }}
+ */
+export function dialTranscriber() {
+    return {
+        type: DIAL_TRANSCRIBER
+    };
+}
+
+/**
+ * Stop the transcribing by kicking the transcriber participant.
+ *
+ * @returns {{
+ *     type: STOP_TRANSCRIBING
+ * }}
+ */
+export function stopTranscribing() {
+    return {
+        type: STOP_TRANSCRIBING
+    };
+}
+
+/**
+ * Notify that the transcriber, with a unique ID, has joined.
+ *
+ * @param {string} participantId - The participant id of the transcriber.
+ * @returns {{
+ *     type: _TRANSCRIBER_JOINED,
+ *     participantId: string
+ * }}
+ */
+export function transcriberJoined(participantId: string) {
+    return {
+        type: _TRANSCRIBER_JOINED,
+        transcriberJID: participantId
+    };
+}
+
+/**
+ * Notify that the transcriber, with a unique ID, has left.
+ *
+ * @param {string} participantId - The participant id of the transcriber.
+ * @returns {{
+ *     type: _TRANSCRIBER_LEFT,
+ *     participantId: string
+ * }}
+ */
+export function transcriberLeft(participantId: string) {
+    return {
+        type: _TRANSCRIBER_LEFT,
+        transcriberJID: participantId
+    };
+}
+
+/**
+ * Notify that a potential transcriber, with a unique ID, has joined.
+ *
+ * @param {string} participantId - The participant id of the transcriber.
+ * @returns {{
+ *     type: _POTENTIAL_TRANSCRIBER_JOINED,
+ *     participantId: string
+ * }}
+ */
+export function potentialTranscriberJoined(participantId: string) {
+    return {
+        type: _POTENTIAL_TRANSCRIBER_JOINED,
+        transcriberJID: participantId
+    };
+}
+
+/**
+ * Notify that dialing the transcriber resulted in an error.
+ *
+ * @returns {{
+ *      type: _DIAL_ERROR
+ * }}
+ */
+export function dialError() {
+    return {
+        type: _DIAL_ERROR
+    };
+}
+
+/**
+ * Signals that the pending transcribing notification should be shown on the
+ * screen.
+ *
+ * @returns {Function}
+ */
+export function showPendingTranscribingNotification() {
+    return (dispatch: Function) => {
+        const showNotificationAction = showNotification({
+            descriptionKey: 'transcribing.pending',
+            isDismissAllowed: false,
+            titleKey: 'dialog.transcribing'
+        });
+
+        dispatch(showNotificationAction);
+
+        dispatch(setPendingTranscribingNotificationUid(
+            showNotificationAction.uid));
+    };
+}
+
+/**
+ * Sets UID of the the pending transcribing notification to use it when hiding
+ * the notification is necessary, or unsets it when
+ * undefined (or no param) is passed.
+ *
+ * @param {?number} uid - The UID of the notification.
+ * redux.
+ * @returns {{
+ *     type: SET_PENDING_TRANSCRIBING_NOTIFICATION_UID,
+ *     uid: number
+ * }}
+ */
+export function setPendingTranscribingNotificationUid(uid: ?number) {
+    return {
+        type: SET_PENDING_TRANSCRIBING_NOTIFICATION_UID,
+        uid
+    };
+}
+
+/**
+ * Signals that the pending transcribing notification should be removed from the
+ * screen.
+ *
+ * @returns {Function}
+ */
+export function hidePendingTranscribingNotification() {
+    return (dispatch: Function, getState: Function) => {
+        const { pendingNotificationUid } = getState()['features/transcribing'];
+
+        if (pendingNotificationUid) {
+            dispatch(hideNotification(pendingNotificationUid));
+            dispatch(setPendingTranscribingNotificationUid());
+        }
+    };
+}
+
+/**
+ * Signals that the stopped transcribing notification should be shown on the
+ * screen for a 2500 ms.
+ *
+ * @returns {showNotification}
+ */
+export function showStoppedTranscribingNotification() {
+    return showNotification({
+        descriptionKey: 'transcribing.off',
+        titleKey: 'dialog.transcribing'
+    }, 2500);
+}
+
+
+/**
+ * Signals that the transcribing error notification should be shown.
+ *
+ * @returns {showErrorNotification}
+ */
+export function showTranscribingError() {
+    return showErrorNotification({
+        descriptionKey: 'transcribing.error',
+        titleKey: 'transcribing.failedToStart'
+    });
+}
+
+
diff --git a/react/features/transcribing/components/ClosedCaptionButton.native.js b/react/features/transcribing/components/ClosedCaptionButton.native.js
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/react/features/transcribing/components/ClosedCaptionButton.web.js b/react/features/transcribing/components/ClosedCaptionButton.web.js
new file mode 100644
index 000000000000..a644046810d9
--- /dev/null
+++ b/react/features/transcribing/components/ClosedCaptionButton.web.js
@@ -0,0 +1,131 @@
+// @flow
+
+import React, { Component } from 'react';
+import { connect } from 'react-redux';
+import { translate } from '../../base/i18n/index';
+
+import { ToolbarButton } from '../../toolbox/';
+
+import { dialTranscriber, stopTranscribing } from '../actions';
+import { createToolbarEvent, sendAnalytics } from '../../analytics';
+
+
+/**
+ * The type of the React {@code Component} props of {@link TranscribingLabel}.
+ */
+type Props = {
+
+    /**
+     * Invoked to obtain translated strings.
+     */
+    t: Function,
+
+    /**
+     * Invoked to Dispatch an Action to the redux store.
+     */
+    dispatch: Function,
+
+    /**
+     * Boolean value indicating current transcribing status
+     */
+    _transcribing: boolean,
+
+    /**
+     * Boolean value indicating current dialing status
+     */
+    _dialing: boolean
+};
+
+/**
+ * React Component for displaying a label when a transcriber is in the
+ * conference.
+ *
+ * @extends Component
+ */
+class ClosedCaptionButton extends Component<Props> {
+
+    /**
+     * Initializes a new {@code ClosedCaptionButton} instance.
+     *
+     * @param {Props} props - The read-only properties with which the new
+     * instance is to be initialized.
+     */
+    constructor(props: Props) {
+        super(props);
+
+        // Bind event handler so it is only bound once for every instance.
+        this._onToggleButton = this._onToggleButton.bind(this);
+    }
+
+    /**
+     * Implements React's {@link Component#render()}.
+     *
+     * @inheritdoc
+     * @returns {ReactElement}
+     */
+    render() {
+        const { _dialing, _transcribing, t } = this.props;
+        const iconClass = `icon-closed_caption ${_dialing || _transcribing
+            ? 'toggled' : ''}`;
+
+        return (
+            <ToolbarButton
+                accessibilityLabel
+                    = { t('toolbar.accessibilityLabel.cc') }
+                iconName = { iconClass }
+                onClick = { this._onToggleButton }
+                tooltip = { t('transcribing.ccButtonTooltip') } />
+        );
+    }
+
+    _onToggleButton: () => void;
+
+    /**
+     * Dispatch actions for starting or stopping transcription, based on
+     * current state.
+     *
+     * @private
+     * @returns {void}
+     */
+    _onToggleButton() {
+        const { _transcribing, _dialing, dispatch } = this.props;
+
+        sendAnalytics(createToolbarEvent(
+            'transcribing.ccButton',
+            {
+                'is_transcribing': Boolean(_transcribing),
+                'is_dialing': Boolean(_dialing)
+            }));
+
+        if (_dialing) {
+            return;
+        }
+
+        if (_transcribing) {
+            dispatch(stopTranscribing());
+        } else {
+            dispatch(dialTranscriber());
+        }
+    }
+
+}
+
+/**
+ * Maps (parts of) the Redux state to the associated props for the
+ * {@code ClosedCaptionButton} component.
+ *
+ * @param {Object} state - The Redux state.
+ * @private
+ * @returns {{
+ * }}
+ */
+function _mapStateToProps(state) {
+    const { isTranscribing, isDialing } = state['features/transcribing'];
+
+    return {
+        _transcribing: isTranscribing,
+        _dialing: isDialing
+    };
+}
+
+export default translate(connect(_mapStateToProps)(ClosedCaptionButton));
diff --git a/react/features/transcribing/components/TranscribingLabel.native.js b/react/features/transcribing/components/TranscribingLabel.native.js
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/react/features/transcribing/components/TranscribingLabel.web.js b/react/features/transcribing/components/TranscribingLabel.web.js
new file mode 100644
index 000000000000..b220827e121d
--- /dev/null
+++ b/react/features/transcribing/components/TranscribingLabel.web.js
@@ -0,0 +1,75 @@
+// @flow
+
+import React, { Component } from 'react';
+import { connect } from 'react-redux';
+import { translate } from '../../base/i18n/index';
+
+import { CircularLabel } from '../../base/label/index';
+import Tooltip from '@atlaskit/tooltip';
+
+/**
+ * The type of the React {@code Component} props of {@link TranscribingLabel}.
+ */
+type Props = {
+
+    /**
+     * Invoked to obtain translated strings.
+     */
+    t: Function,
+
+    /**
+     * Boolean value indicating current transcribing status
+     */
+    _transcribing: boolean
+};
+
+/**
+ * React Component for displaying a label when a transcriber is in the
+ * conference.
+ *
+ * @extends Component
+ */
+class TranscribingLabel extends Component<Props> {
+
+    /**
+     * Implements React's {@link Component#render()}.
+     *
+     * @inheritdoc
+     * @returns {ReactElement}
+     */
+    render() {
+        if (!this.props._transcribing) {
+            return null;
+        }
+
+        return (
+            <Tooltip
+                content = { this.props.t('transcribing.labelToolTip') }
+                position = { 'left' }>
+                <CircularLabel
+                    className = 'recording-label'
+                    label = { this.props.t('transcribing.tr') } />
+            </Tooltip>
+        );
+    }
+
+}
+
+/**
+ * Maps (parts of) the Redux state to the associated props for the
+ * {@code TranscribingLabel} component.
+ *
+ * @param {Object} state - The Redux state.
+ * @private
+ * @returns {{
+ * }}
+ */
+function _mapStateToProps(state) {
+    const { isTranscribing } = state['features/transcribing'];
+
+    return {
+        _transcribing: isTranscribing
+    };
+}
+
+export default translate(connect(_mapStateToProps)(TranscribingLabel));
diff --git a/react/features/transcribing/components/index.js b/react/features/transcribing/components/index.js
new file mode 100644
index 000000000000..651bc819c0d4
--- /dev/null
+++ b/react/features/transcribing/components/index.js
@@ -0,0 +1,2 @@
+export { default as TranscribingLabel } from './TranscribingLabel';
+export { default as ClosedCaptionButton } from './ClosedCaptionButton';
diff --git a/react/features/transcribing/index.js b/react/features/transcribing/index.js
new file mode 100644
index 000000000000..7f0ef0251d9d
--- /dev/null
+++ b/react/features/transcribing/index.js
@@ -0,0 +1,5 @@
+export * from './actions';
+export * from './components';
+
+import './middleware';
+import './reducer';
diff --git a/react/features/transcribing/middleware.js b/react/features/transcribing/middleware.js
new file mode 100644
index 000000000000..19e963f4423b
--- /dev/null
+++ b/react/features/transcribing/middleware.js
@@ -0,0 +1,100 @@
+// @flow
+
+import { MiddlewareRegistry } from '../base/redux';
+
+import {
+    _TRANSCRIBER_LEFT,
+    DIAL_TRANSCRIBER,
+    STOP_TRANSCRIBING
+} from './actionTypes';
+import {
+    dialError,
+    hidePendingTranscribingNotification,
+    potentialTranscriberJoined,
+    showPendingTranscribingNotification,
+    showStoppedTranscribingNotification,
+    showTranscribingError,
+    transcriberJoined,
+    transcriberLeft
+} from './actions';
+import {
+    HIDDEN_PARTICIPANT_JOINED,
+    HIDDEN_PARTICIPANT_LEFT,
+    PARTICIPANT_UPDATED
+} from './../base/participants';
+
+declare var APP: Object;
+
+const TRANSCRIBER_DIAL_COMMAND = 'jitsi_meet_transcribe';
+const TRANSCRIBER_DISPLAY_NAME = 'Transcriber';
+
+/**
+ * Implements the middleware of the feature transcribing.
+ *
+ * @param {Store} store - The redux store.
+ * @returns {Function}
+ */
+// eslint-disable-next-line no-unused-vars
+MiddlewareRegistry.register(store => next => action => {
+    const {
+        isDialing,
+        isTranscribing,
+        transcriberJID,
+        potentialTranscriberJIDs
+    } = store.getState()['features/transcribing'];
+
+    const { conference } = store.getState()['features/base/conference'];
+
+    switch (action.type) {
+    case DIAL_TRANSCRIBER:
+        if (!(isDialing || isTranscribing)) {
+            store.dispatch(showPendingTranscribingNotification());
+
+            conference.room.dial(TRANSCRIBER_DIAL_COMMAND).catch(
+                () => {
+                    store.dispatch(dialError());
+                    store.dispatch(hidePendingTranscribingNotification());
+                    store.dispatch(showTranscribingError());
+                }
+            );
+        }
+        break;
+    case STOP_TRANSCRIBING:
+        if (isTranscribing) {
+            const participant = conference.getParticipantById(transcriberJID);
+
+            conference.room.kick(participant.getJid());
+        }
+        break;
+    case _TRANSCRIBER_LEFT:
+        store.dispatch(showStoppedTranscribingNotification());
+        break;
+    case HIDDEN_PARTICIPANT_JOINED:
+        if (action.displayName
+                && action.displayName === TRANSCRIBER_DISPLAY_NAME) {
+            store.dispatch(transcriberJoined(action.id));
+        } else {
+            store.dispatch(potentialTranscriberJoined(action.id));
+        }
+
+        break;
+    case HIDDEN_PARTICIPANT_LEFT:
+        if (action.id === transcriberJID) {
+            store.dispatch(transcriberLeft(action.id));
+        }
+        break;
+    case PARTICIPANT_UPDATED: {
+        const { participant } = action;
+
+        if (potentialTranscriberJIDs.includes(participant.id)
+            && participant.name === TRANSCRIBER_DISPLAY_NAME) {
+            store.dispatch(transcriberJoined(participant.id));
+            store.dispatch(hidePendingTranscribingNotification());
+        }
+
+        break;
+    }
+    }
+
+    return next(action);
+});
diff --git a/react/features/transcribing/reducer.js b/react/features/transcribing/reducer.js
new file mode 100644
index 000000000000..68b321d1e0c3
--- /dev/null
+++ b/react/features/transcribing/reducer.js
@@ -0,0 +1,115 @@
+import { ReducerRegistry } from '../base/redux';
+import {
+    _DIAL_ERROR,
+    _TRANSCRIBER_JOINED,
+    _TRANSCRIBER_LEFT,
+    _POTENTIAL_TRANSCRIBER_JOINED,
+    DIAL_TRANSCRIBER,
+    SET_PENDING_TRANSCRIBING_NOTIFICATION_UID,
+    STOP_TRANSCRIBING
+} from '../transcribing/actionTypes';
+
+/**
+ * Returns initial state for transcribing feature part of Redux store.
+ *
+ * @returns {{
+ * isTranscribing: boolean,
+ * isDialing: boolean,
+ * transcriberJID: null,
+ * potentialTranscriberJIDs: Array
+ * }}
+ * @private
+ */
+function _getInitialState() {
+    return {
+        /**
+         * Indicates whether there is currently an active transcriber in the
+         * room
+         *
+         * @type {boolean}
+         */
+        isTranscribing: false,
+
+        /**
+         * Indicates whether the transcriber has been dialed into the room and
+         * we're currently awaiting successfull joining or failure of joining
+         *
+         * @type {boolean}
+         */
+        isDialing: false,
+
+        /**
+         * Indicates whether the transcribing feature is in the process of
+         * terminating; the transcriber has been told to leave.
+         */
+        isTerminating: false,
+
+        /**
+         * The JID of the active transcriber
+         *
+         * @type { string }
+         */
+        transcriberJID: null,
+
+        /**
+         * A list containing potential JID's of transcriber participants
+         *
+         * @type { Array }
+         */
+        potentialTranscriberJIDs: []
+    };
+}
+
+/**
+ * Reduces the Redux actions of the feature features/transcribing.
+ */
+ReducerRegistry.register('features/transcribing',
+    (state = _getInitialState(), action) => {
+        switch (action.type) {
+        case DIAL_TRANSCRIBER:
+            return {
+                ...state,
+                isDialing: true
+            };
+        case STOP_TRANSCRIBING:
+            return {
+                ...state,
+                isTerminating: true
+            };
+        case _DIAL_ERROR:
+            return {
+                ...state,
+                isDialing: false,
+                potentialTranscriberJIDs: []
+            };
+        case _TRANSCRIBER_JOINED:
+            return {
+                ...state,
+                isTranscribing: true,
+                isDialing: false,
+                transcriberJID: action.transcriberJID
+            };
+        case _TRANSCRIBER_LEFT:
+            return {
+                ...state,
+                isTerminating: false,
+                isTranscribing: false,
+                transcriberJID: undefined,
+                potentialTranscriberJIDs: []
+            };
+        case _POTENTIAL_TRANSCRIBER_JOINED:
+            return {
+                ...state,
+                potentialTranscriberJIDs:
+                    [ action.transcriberJID ]
+                        .concat(state.potentialTranscriberJIDs)
+            };
+        case SET_PENDING_TRANSCRIBING_NOTIFICATION_UID:
+            return {
+                ...state,
+                pendingNotificationUid: action.uid
+            };
+        default:
+            return state;
+        }
+    });