diff --git a/src/assets/css/librarybrowser.css b/src/assets/css/librarybrowser.css
index 67afef2376..0bf65d83a7 100644
--- a/src/assets/css/librarybrowser.css
+++ b/src/assets/css/librarybrowser.css
@@ -115,7 +115,7 @@
     display: -webkit-inline-box;
     display: -webkit-inline-flex;
     display: inline-flex;
-    margin: 0.3em 0 0 0.5em;
+    margin: 0 0 0 0.5em;
     height: 1.7em;
     -webkit-box-align: center;
     -webkit-align-items: center;
@@ -128,6 +128,10 @@
     margin-top: 0;
 }
 
+.layout-mobile .pageTitleWithDefaultLogo {
+    background-image: url(../img/icon-transparent.png);
+}
+
 .headerLeft,
 .skinHeader {
     display: -webkit-box;
@@ -242,7 +246,6 @@
 }
 
 @media all and (min-width: 40em) {
-    .dashboardDocument .adminDrawerLogo,
     .dashboardDocument .mainDrawerButton {
         display: none !important;
     }
@@ -268,12 +271,6 @@
     }
 }
 
-@media all and (max-width: 60em) {
-    .libraryDocument .mainDrawerButton {
-        display: none;
-    }
-}
-
 @media all and (max-width: 84em) {
     .withSectionTabs .headerTop {
         padding-bottom: 0.55em;
diff --git a/src/components/castSenderApi.js b/src/components/castSenderApi.js
new file mode 100644
index 0000000000..a1e7bd8755
--- /dev/null
+++ b/src/components/castSenderApi.js
@@ -0,0 +1,34 @@
+define([], function() {
+    'use strict';
+
+    if (window.appMode === "cordova" || window.appMode === "android") {
+        return {
+            load: function () {
+                window.chrome = window.chrome || {};
+                return Promise.resolve();
+            }
+        };
+    } else {
+        var ccLoaded = false;
+        return {
+            load: function () {
+                if (ccLoaded) {
+                    return Promise.resolve();
+                }
+
+                return new Promise(function (resolve, reject) {
+                    var fileref = document.createElement("script");
+                    fileref.setAttribute("type", "text/javascript");
+
+                    fileref.onload = function () {
+                        ccLoaded = true;
+                        resolve();
+                    };
+
+                    fileref.setAttribute("src", "https://www.gstatic.com/cv/js/sender/v1/cast_sender.js");
+                    document.querySelector("head").appendChild(fileref);
+                });
+            }
+        };
+    }
+});
diff --git a/src/components/confirm/confirm.js b/src/components/confirm/confirm.js
index f104350c87..fa9a156679 100644
--- a/src/components/confirm/confirm.js
+++ b/src/components/confirm/confirm.js
@@ -1,40 +1,65 @@
-define(['dialog', 'globalize'], function (dialog, globalize) {
+define(["browser", "dialog", "globalize"], function(browser, dialog, globalize) {
     'use strict';
 
-    return function (text, title) {
+    function replaceAll(str, find, replace) {
+        return str.split(find).join(replace);
+    }
 
-        var options;
-        if (typeof text === 'string') {
-            options = {
-                title: title,
-                text: text
-            };
-        } else {
-            options = text;
-        }
-
-        var items = [];
-
-        items.push({
-            name: options.cancelText || globalize.translate('ButtonCancel'),
-            id: 'cancel',
-            type: 'cancel'
-        });
-
-        items.push({
-            name: options.confirmText || globalize.translate('ButtonOk'),
-            id: 'ok',
-            type: options.primary === 'delete' ? 'delete' : 'submit'
-        });
-
-        options.buttons = items;
-
-        return dialog(options).then(function (result) {
-            if (result === 'ok') {
-                return Promise.resolve();
+    if (browser.tv && window.confirm) {
+        // Use the native confirm dialog
+        return function (options) {
+            if (typeof options === 'string') {
+                options = {
+                    title: '',
+                    text: options
+                };
             }
 
-            return Promise.reject();
-        });
-    };
+            var text = replaceAll(options.text || '', '<br/>', '\n');
+            var result = confirm(text);
+
+            if (result) {
+                return Promise.resolve();
+            } else {
+                return Promise.reject();
+            }
+        };
+    } else {
+        // Use our own dialog
+        return function (text, title) {
+            var options;
+            if (typeof text === 'string') {
+                options = {
+                    title: title,
+                    text: text
+                };
+            } else {
+                options = text;
+            }
+
+            var items = [];
+
+            items.push({
+                name: options.cancelText || globalize.translate('ButtonCancel'),
+                id: 'cancel',
+                type: 'cancel'
+            });
+
+            items.push({
+                name: options.confirmText || globalize.translate('ButtonOk'),
+                id: 'ok',
+                type: options.primary === 'delete' ? 'delete' : 'submit'
+            });
+
+            options.buttons = items;
+
+            return dialog(options).then(function (result) {
+                if (result === 'ok') {
+                    return Promise.resolve();
+                }
+
+                return Promise.reject();
+            });
+        };
+    }
 });
diff --git a/src/components/confirm/nativeconfirm.js b/src/components/confirm/nativeconfirm.js
deleted file mode 100644
index 7d72bc5eaf..0000000000
--- a/src/components/confirm/nativeconfirm.js
+++ /dev/null
@@ -1,27 +0,0 @@
-define([], function () {
-    'use strict';
-
-    function replaceAll(str, find, replace) {
-
-        return str.split(find).join(replace);
-    }
-
-    return function (options) {
-
-        if (typeof options === 'string') {
-            options = {
-                title: '',
-                text: options
-            };
-        }
-
-        var text = replaceAll(options.text || '', '<br/>', '\n');
-        var result = confirm(text);
-
-        if (result) {
-            return Promise.resolve();
-        } else {
-            return Promise.reject();
-        }
-    };
-});
diff --git a/src/components/dialogHelper/dialogHelper.js b/src/components/dialogHelper/dialogHelper.js
index d8ddc13c0a..e3410776a8 100644
--- a/src/components/dialogHelper/dialogHelper.js
+++ b/src/components/dialogHelper/dialogHelper.js
@@ -169,6 +169,15 @@ define(['appRouter', 'focusManager', 'browser', 'layoutManager', 'inputManager',
         }, {
             passive: true
         });
+
+        dom.addEventListener((dlg.dialogContainer || backdrop), 'contextmenu', function (e) {
+            if (e.target === dlg.dialogContainer) {
+                // Close the application dialog menu
+                close(dlg);
+                // Prevent the default browser context menu from appearing
+                e.preventDefault();
+            }
+        });
     }
 
     function isHistoryEnabled(dlg) {
diff --git a/src/components/playback/playbackmanager.js b/src/components/playback/playbackmanager.js
index 3a3bddd989..8de1ffc190 100644
--- a/src/components/playback/playbackmanager.js
+++ b/src/components/playback/playbackmanager.js
@@ -3162,7 +3162,8 @@ define(['events', 'datetime', 'appSettings', 'itemHelper', 'pluginManager', 'pla
 
             // User clicked stop or content ended
             var state = self.getPlayerState(player);
-            var streamInfo = getPlayerData(player).streamInfo;
+            var data = getPlayerData(player);
+            var streamInfo = data.streamInfo;
 
             var nextItem = self._playNextAfterEnded ? self._playQueueManager.getNextItemInfo() : null;
 
@@ -3210,6 +3211,9 @@ define(['events', 'datetime', 'appSettings', 'itemHelper', 'pluginManager', 'pla
                 showPlaybackInfoErrorMessage(self, displayErrorCode, nextItem);
             } else if (nextItem) {
                 self.nextTrack();
+            } else {
+                // Nothing more to play - clear data
+                data.streamInfo = null;
             }
         }
 
diff --git a/src/components/prompt/nativeprompt.js b/src/components/prompt/nativeprompt.js
deleted file mode 100644
index ba7f1a9a49..0000000000
--- a/src/components/prompt/nativeprompt.js
+++ /dev/null
@@ -1,28 +0,0 @@
-define([], function () {
-    'use strict';
-
-    function replaceAll(str, find, replace) {
-
-        return str.split(find).join(replace);
-    }
-
-    return function (options) {
-
-        if (typeof options === 'string') {
-            options = {
-                label: '',
-                text: options
-            };
-        }
-
-        var label = replaceAll(options.label || '', '<br/>', '\n');
-
-        var result = prompt(label, options.text || '');
-
-        if (result) {
-            return Promise.resolve(result);
-        } else {
-            return Promise.reject(result);
-        }
-    };
-});
diff --git a/src/components/prompt/prompt.js b/src/components/prompt/prompt.js
index 8f4f839eaa..41d40c4a48 100644
--- a/src/components/prompt/prompt.js
+++ b/src/components/prompt/prompt.js
@@ -1,6 +1,10 @@
-define(['dialogHelper', 'layoutManager', 'scrollHelper', 'globalize', 'dom', 'require', 'material-icons', 'emby-button', 'paper-icon-button-light', 'emby-input', 'formDialogStyle'], function (dialogHelper, layoutManager, scrollHelper, globalize, dom, require) {
+define(["browser", 'dialogHelper', 'layoutManager', 'scrollHelper', 'globalize', 'dom', 'require', 'material-icons', 'emby-button', 'paper-icon-button-light', 'emby-input', 'formDialogStyle'], function(browser, dialogHelper, layoutManager, scrollHelper, globalize, dom, require) {
     'use strict';
 
+    function replaceAll(str, find, replace) {
+        return str.split(find).join(replace);
+    }
+
     function setInputProperties(dlg, options) {
         var txtInput = dlg.querySelector('#txtInput');
 
@@ -13,7 +17,6 @@ define(['dialogHelper', 'layoutManager', 'scrollHelper', 'globalize', 'dom', 're
     }
 
     function showDialog(options, template) {
-
         var dialogOptions = {
             removeOnClose: true,
             scrollY: false
@@ -71,34 +74,49 @@ define(['dialogHelper', 'layoutManager', 'scrollHelper', 'globalize', 'dom', 're
         dlg.style.minWidth = (Math.min(400, dom.getWindowSize().innerWidth - 50)) + 'px';
 
         return dialogHelper.open(dlg).then(function () {
-
             if (layoutManager.tv) {
                 scrollHelper.centerFocus.off(dlg.querySelector('.formDialogContent'), false);
             }
 
-            var value = submitValue;
-
-            if (value) {
-                return value;
+            if (submitValue) {
+                return submitValue;
             } else {
                 return Promise.reject();
             }
         });
     }
 
-    return function (options) {
+    if ((browser.tv || browser.xboxOne) && window.confirm) {
+        return function (options) {
+            if (typeof options === 'string') {
+                options = {
+                    label: '',
+                    text: options
+                };
+            }
 
-        return new Promise(function (resolve, reject) {
-            require(['text!./prompt.template.html'], function (template) {
+            var label = replaceAll(options.label || '', '<br/>', '\n');
+            var result = prompt(label, options.text || '');
 
-                if (typeof options === 'string') {
-                    options = {
-                        title: '',
-                        text: options
-                    };
-                }
-                showDialog(options, template).then(resolve, reject);
+            if (result) {
+                return Promise.resolve(result);
+            } else {
+                return Promise.reject(result);
+            }
+        };
+    } else {
+        return function (options) {
+            return new Promise(function (resolve, reject) {
+                require(['text!./prompt.template.html'], function (template) {
+                    if (typeof options === 'string') {
+                        options = {
+                            title: '',
+                            text: options
+                        };
+                    }
+                    showDialog(options, template).then(resolve, reject);
+                });
             });
-        });
-    };
+        };
+    }
 });
diff --git a/src/components/tvproviders/schedulesdirect.js b/src/components/tvproviders/schedulesdirect.js
index a1265e7cc9..cf11e5736d 100644
--- a/src/components/tvproviders/schedulesdirect.js
+++ b/src/components/tvproviders/schedulesdirect.js
@@ -264,17 +264,13 @@ define(["jQuery", "loading", "emby-checkbox", "listViewStyle", "emby-input", "em
         self.init = function () {
             options = options || {};
 
-            if (options.showCancelButton) {
-                page.querySelector(".btnCancel").classList.remove("hide");
-            } else {
-                page.querySelector(".btnCancel").classList.add("hide");
-            }
+            // Only hide the buttons if explicitly set to false; default to showing if undefined or null
+            // FIXME: rename this option to clarify logic
+            var hideCancelButton = options.showCancelButton === false;
+            page.querySelector(".btnCancel").classList.toggle("hide", hideCancelButton);
 
-            if (options.showSubmitButton) {
-                page.querySelector(".btnSubmitListings").classList.remove("hide");
-            } else {
-                page.querySelector(".btnSubmitListings").classList.add("hide");
-            }
+            var hideSubmitButton = options.showSubmitButton === false;
+            page.querySelector(".btnSubmitListings").classList.toggle("hide", hideSubmitButton);
 
             $(".formLogin", page).on("submit", function () {
                 submitLoginForm();
diff --git a/src/components/tvproviders/xmltv.js b/src/components/tvproviders/xmltv.js
index a86a1e1099..7e7d381f09 100644
--- a/src/components/tvproviders/xmltv.js
+++ b/src/components/tvproviders/xmltv.js
@@ -163,17 +163,13 @@ define(["jQuery", "loading", "emby-checkbox", "emby-input", "listViewStyle", "pa
         self.init = function () {
             options = options || {};
 
-            if (false !== options.showCancelButton) {
-                page.querySelector(".btnCancel").classList.remove("hide");
-            } else {
-                page.querySelector(".btnCancel").classList.add("hide");
-            }
+            // Only hide the buttons if explicitly set to false; default to showing if undefined or null
+            // FIXME: rename this option to clarify logic
+            var hideCancelButton = options.showCancelButton === false;
+            page.querySelector(".btnCancel").classList.toggle("hide", hideCancelButton);
 
-            if (false !== options.showSubmitButton) {
-                page.querySelector(".btnSubmitListings").classList.remove("hide");
-            } else {
-                page.querySelector(".btnSubmitListings").classList.add("hide");
-            }
+            var hideSubmitButton = options.showSubmitButton === false;
+            page.querySelector(".btnSubmitListings").classList.toggle("hide", hideSubmitButton);
 
             $("form", page).on("submit", function () {
                 submitListingsForm();
diff --git a/src/controllers/playback/videoosd.js b/src/controllers/playback/videoosd.js
index 24b6548544..c61fd14a7a 100644
--- a/src/controllers/playback/videoosd.js
+++ b/src/controllers/playback/videoosd.js
@@ -671,7 +671,8 @@ define(["playbackManager", "dom", "inputManager", "datetime", "itemHelper", "med
         }
 
         function onTimeUpdate(e) {
-            if (isEnabled) {
+            // Test for 'currentItem' is required for Firefox since its player spams 'timeupdate' events even being at breakpoint
+            if (isEnabled && currentItem) {
                 var now = new Date().getTime();
 
                 if (!(now - lastUpdateTime < 700)) {
diff --git a/src/scripts/browser.js b/src/scripts/browser.js
index 791ac7411b..f9e1942320 100644
--- a/src/scripts/browser.js
+++ b/src/scripts/browser.js
@@ -271,6 +271,9 @@ define([], function () {
 
     if (!browser.tizen) {
         browser.orsay = userAgent.toLowerCase().indexOf('smarthub') !== -1;
+    } else {
+        var v = (navigator.appVersion).match(/Tizen (\d+).(\d+)/);
+        browser.tizenVersion = parseInt(v[1]);
     }
 
     if (browser.edgeUwp) {
diff --git a/src/scripts/browserdeviceprofile.js b/src/scripts/browserdeviceprofile.js
index b45bdc59bf..337463987c 100644
--- a/src/scripts/browserdeviceprofile.js
+++ b/src/scripts/browserdeviceprofile.js
@@ -214,6 +214,15 @@ define(['browser'], function (browser) {
                 break;
             case 'avi':
                 supported = browser.tizen || browser.orsay || browser.web0s || browser.edgeUwp;
+                // New Samsung TV don't support XviD/DivX
+                // Explicitly add supported codecs to make other codecs be transcoded
+                if (browser.tizenVersion >= 4) {
+                    videoCodecs.push('h264');
+                    if (canPlayH265(videoTestElement, options)) {
+                        videoCodecs.push('h265');
+                        videoCodecs.push('hevc');
+                    }
+                }
                 break;
             case 'mpg':
             case 'mpeg':
diff --git a/src/scripts/librarymenu.js b/src/scripts/librarymenu.js
index 001c75787d..5e6562ee42 100644
--- a/src/scripts/librarymenu.js
+++ b/src/scripts/librarymenu.js
@@ -73,7 +73,7 @@ define(["dom", "layoutManager", "inputManager", "connectionManager", "events", "
         }
 
         if (user && user.localUser) {
-            if (headerHomeButton) {
+            if (headerHomeButton && !layoutManager.mobile) {
                 headerHomeButton.classList.remove("hide");
             }
 
@@ -788,7 +788,7 @@ define(["dom", "layoutManager", "inputManager", "connectionManager", "events", "
     var headerCastButton;
     var headerSearchButton;
     var headerAudioPlayerButton;
-    var enableLibraryNavDrawer = !layoutManager.tv;
+    var enableLibraryNavDrawer = layoutManager.desktop;
     var skinHeader = document.querySelector(".skinHeader");
     var requiresUserRefresh = true;
     var lastOpenTime = new Date().getTime();
@@ -863,6 +863,7 @@ define(["dom", "layoutManager", "inputManager", "connectionManager", "events", "
     pageClassOn("pageshow", "page", function (e) {
         var page = this;
         var isDashboardPage = page.classList.contains("type-interior");
+        var isHomePage = page.classList.contains("homePage");
         var isLibraryPage = !isDashboardPage && page.classList.contains("libraryPage");
         var apiClient = getCurrentApiClient();
 
@@ -874,7 +875,7 @@ define(["dom", "layoutManager", "inputManager", "connectionManager", "events", "
             refreshDashboardInfoInDrawer(apiClient);
         } else {
             if (mainDrawerButton) {
-                if (enableLibraryNavDrawer) {
+                if (enableLibraryNavDrawer || isHomePage) {
                     mainDrawerButton.classList.remove("hide");
                 } else {
                     mainDrawerButton.classList.add("hide");
diff --git a/src/scripts/site.js b/src/scripts/site.js
index 0ab8e9a1f0..6739e3cd59 100644
--- a/src/scripts/site.js
+++ b/src/scripts/site.js
@@ -355,39 +355,6 @@ var AppInfo = {};
         return headroom;
     }
 
-    function getCastSenderApiLoader() {
-        var ccLoaded = false;
-        return {
-            load: function () {
-                if (ccLoaded) {
-                    return Promise.resolve();
-                }
-
-                return new Promise(function (resolve, reject) {
-                    var fileref = document.createElement("script");
-                    fileref.setAttribute("type", "text/javascript");
-
-                    fileref.onload = function () {
-                        ccLoaded = true;
-                        resolve();
-                    };
-
-                    fileref.setAttribute("src", "https://www.gstatic.com/cv/js/sender/v1/cast_sender.js");
-                    document.querySelector("head").appendChild(fileref);
-                });
-            }
-        };
-    }
-
-    function getDummyCastSenderApiLoader() {
-        return {
-            load: function () {
-                window.chrome = window.chrome || {};
-                return Promise.resolve();
-            }
-        };
-    }
-
     function createSharedAppFooter(appFooter) {
         return new appFooter({});
     }
@@ -439,28 +406,16 @@ var AppInfo = {};
         defineResizeObserver();
         define("dialog", [componentsPath + "/dialog/dialog"], returnFirstDependency);
 
-        if (preferNativeAlerts && window.confirm) {
-            define("confirm", [componentsPath + "/confirm/nativeconfirm"], returnFirstDependency);
-        } else {
-            define("confirm", [componentsPath + "/confirm/confirm"], returnFirstDependency);
-        }
+        define("confirm", [componentsPath + "/confirm/confirm"], returnFirstDependency);
 
-        if ((preferNativeAlerts || browser.xboxOne) && window.confirm) {
-            define("prompt", [componentsPath + "/prompt/nativeprompt"], returnFirstDependency);
-        } else {
-            define("prompt", [componentsPath + "/prompt/prompt"], returnFirstDependency);
-        }
+        define("prompt", [componentsPath + "/prompt/prompt"], returnFirstDependency);
 
         define("loading", [componentsPath + "/loading/loading"], returnFirstDependency);
         define("multi-download", [componentsPath + "/multidownload"], returnFirstDependency);
         define("fileDownloader", [componentsPath + "/filedownloader"], returnFirstDependency);
         define("localassetmanager", [bowerPath + "/apiclient/localassetmanager"], returnFirstDependency);
 
-        if ("cordova" === self.appMode || "android" === self.appMode) {
-            define("castSenderApiLoader", [], getDummyCastSenderApiLoader);
-        } else {
-            define("castSenderApiLoader", [], getCastSenderApiLoader);
-        }
+        define("castSenderApiLoader", [componentsPath + "castSenderApi"], returnFirstDependency);
 
         define("transfermanager", [bowerPath + "/apiclient/sync/transfermanager"], returnFirstDependency);
         define("filerepository", [bowerPath + "/apiclient/sync/filerepository"], returnFirstDependency);
diff --git a/src/strings/fa.json b/src/strings/fa.json
index 7b7393c6b9..d4b60fe7c6 100644
--- a/src/strings/fa.json
+++ b/src/strings/fa.json
@@ -139,5 +139,8 @@
     "AllLanguages": "تمام زبان ها",
     "AllLibraries": "تمام کتابخانه ها",
     "AllowHWTranscodingHelp": "اگر فعال شود, اجازه میدهید تبدیل ( کم و زیاد کردن کیفیت ) درلحظه و توسط کارت دریافت سیگنال صورت گیرد. این کمک میکند به اینکه سرور جلیفین کمتر عمل تبدیل را انجام دهد.",
-    "AllowOnTheFlySubtitleExtraction": "اجازه میدهد در لحظه زیرنویس بازشود"
+    "AllowOnTheFlySubtitleExtraction": "اجازه میدهد در لحظه زیرنویس بازشود",
+    "Add": "افزودن",
+    "Actor": "بازیگر",
+    "AccessRestrictedTryAgainLater": "دسترسی در حال حاضر محدود شده است. لطفا دوباره تلاش کنید."
 }
diff --git a/src/strings/hu.json b/src/strings/hu.json
index a6c2a14da2..7ade41afff 100644
--- a/src/strings/hu.json
+++ b/src/strings/hu.json
@@ -1213,7 +1213,7 @@
     "Screenshots": "Képernyőképek",
     "SearchForCollectionInternetMetadata": "Keresés az interneten artwork és metaadat után",
     "Series": "Sorozatok",
-    "SeriesCancelled": "A sorozat törölt.",
+    "SeriesCancelled": "Sorozat törölve.",
     "SeriesRecordingScheduled": "A sorozatfelvétel ütemezett.",
     "SeriesSettings": "Sorozat beállítások",
     "ServerRestartNeededAfterPluginInstall": "A bővítmény telepítése után újra kell indítani a Jellyfin Szerver-t.",
diff --git a/src/strings/pt.json b/src/strings/pt.json
index da6d26d947..ecd6ccb079 100644
--- a/src/strings/pt.json
+++ b/src/strings/pt.json
@@ -1213,5 +1213,10 @@
     "CopyStreamURLError": "Ocorreu um erro ao copiar o URL.",
     "ButtonSplit": "Dividir",
     "AskAdminToCreateLibrary": "Peça  a um administrador para criar a biblioteca.",
-    "AllowFfmpegThrottling": "Transcodificação com falhas"
+    "AllowFfmpegThrottling": "Transcodificação com falhas",
+    "DashboardOperatingSystem": "Sistema Operativo",
+    "LabelUserLoginAttemptsBeforeLockout": "Número de tentativas de login falhadas antes do bloqueio do utilizador:",
+    "LabelTrackNumber": "Número da faixa:",
+    "LabelSportsCategories": "Categorias de Desportos:",
+    "Yesterday": "Ontem"
 }
diff --git a/src/strings/zh-cn.json b/src/strings/zh-cn.json
index 547f55dc3a..b0c9a59694 100644
--- a/src/strings/zh-cn.json
+++ b/src/strings/zh-cn.json
@@ -537,8 +537,8 @@
     "LabelDisplayName": "显示名称：",
     "LabelDisplayOrder": "显示顺序：",
     "LabelDisplaySpecialsWithinSeasons": "显示季中所播出的特集",
-    "LabelDownMixAudioScale": "缩混音频增强：",
-    "LabelDownMixAudioScaleHelp": "缩混音频增强。值为A将保留原来的音量。",
+    "LabelDownMixAudioScale": "降混音频增强：",
+    "LabelDownMixAudioScaleHelp": "降混音时增强音频。值为 1 时将保留原始音量。",
     "LabelDownloadLanguages": "下载语言：",
     "LabelDropImageHere": "拖拽或点击选择图像于此处。",
     "LabelDroppedFrames": "丢弃的帧：",