diff --git a/MediaBrowser.Api/ApiEntryPoint.cs b/MediaBrowser.Api/ApiEntryPoint.cs
index 273d9a7a90..8754e57a1c 100644
--- a/MediaBrowser.Api/ApiEntryPoint.cs
+++ b/MediaBrowser.Api/ApiEntryPoint.cs
@@ -180,7 +180,7 @@ namespace MediaBrowser.Api
 
                 if (job.ActiveRequestCount == 0)
                 {
-                    var timerDuration = type == TranscodingJobType.Progressive ? 1000 : 60000;
+                    var timerDuration = type == TranscodingJobType.Progressive ? 1000 : 180000;
 
                     if (job.KillTimer == null)
                     {
diff --git a/MediaBrowser.Controller/Providers/BaseMetadataProvider.cs b/MediaBrowser.Controller/Providers/BaseMetadataProvider.cs
index a8dc8788f1..2364debed3 100644
--- a/MediaBrowser.Controller/Providers/BaseMetadataProvider.cs
+++ b/MediaBrowser.Controller/Providers/BaseMetadataProvider.cs
@@ -385,7 +385,7 @@ namespace MediaBrowser.Controller.Providers
             var sb = new StringBuilder();
 
             var extensions = FileStampExtensionsDictionary;
-            var numExtensions = extensions.Count;
+            var numExtensions = FilestampExtensions.Length;
 
             // Record the name of each file 
             // Need to sort these because accoring to msdn docs, our i/o methods are not guaranteed in any order
diff --git a/MediaBrowser.Controller/Session/SessionInfo.cs b/MediaBrowser.Controller/Session/SessionInfo.cs
index ba6d3d0acd..dc934b70a3 100644
--- a/MediaBrowser.Controller/Session/SessionInfo.cs
+++ b/MediaBrowser.Controller/Session/SessionInfo.cs
@@ -83,7 +83,7 @@ namespace MediaBrowser.Controller.Session
         /// </summary>
         /// <value>The name of the now viewing item.</value>
         public string NowViewingItemName { get; set; }
-        
+
         /// <summary>
         /// Gets or sets the now playing item.
         /// </summary>
@@ -107,7 +107,7 @@ namespace MediaBrowser.Controller.Session
         /// </summary>
         /// <value><c>true</c> if this instance is muted; otherwise, <c>false</c>.</value>
         public bool IsMuted { get; set; }
-        
+
         /// <summary>
         /// Gets or sets the device id.
         /// </summary>
@@ -139,7 +139,7 @@ namespace MediaBrowser.Controller.Session
                     return WebSockets.Any(i => i.State == WebSocketState.Open);
                 }
 
-                return (DateTime.UtcNow - LastActivityDate).TotalMinutes <= 5;
+                return (DateTime.UtcNow - LastActivityDate).TotalMinutes <= 10;
             }
         }
 
diff --git a/MediaBrowser.Providers/MediaInfo/FFProbeVideoInfoProvider.cs b/MediaBrowser.Providers/MediaInfo/FFProbeVideoInfoProvider.cs
index 690c9b3ffe..c28d06cbb7 100644
--- a/MediaBrowser.Providers/MediaInfo/FFProbeVideoInfoProvider.cs
+++ b/MediaBrowser.Providers/MediaInfo/FFProbeVideoInfoProvider.cs
@@ -178,6 +178,7 @@ namespace MediaBrowser.Providers.MediaInfo
                 }
             }
 
+            SetLastRefreshed(item, DateTime.UtcNow);
             return true;
         }
 
diff --git a/MediaBrowser.Providers/Savers/AlbumXmlSaver.cs b/MediaBrowser.Providers/Savers/AlbumXmlSaver.cs
index e6195c03e4..bd63b5fbde 100644
--- a/MediaBrowser.Providers/Savers/AlbumXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/AlbumXmlSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
@@ -58,7 +59,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new string[] { });
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string> { });
 
             // Set last refreshed so that the provider doesn't trigger after the file save
             PersonProviderFromXml.Current.SetLastRefreshed(item, DateTime.UtcNow);
diff --git a/MediaBrowser.Providers/Savers/ArtistXmlSaver.cs b/MediaBrowser.Providers/Savers/ArtistXmlSaver.cs
index 795e824fcd..a27fb7363b 100644
--- a/MediaBrowser.Providers/Savers/ArtistXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/ArtistXmlSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
@@ -70,7 +71,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new string[] { });
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string> { });
 
             // Set last refreshed so that the provider doesn't trigger after the file save
             ArtistProviderFromXml.Current.SetLastRefreshed(item, DateTime.UtcNow);
diff --git a/MediaBrowser.Providers/Savers/BoxSetXmlSaver.cs b/MediaBrowser.Providers/Savers/BoxSetXmlSaver.cs
index f5fc37fe7a..f09b345708 100644
--- a/MediaBrowser.Providers/Savers/BoxSetXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/BoxSetXmlSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Movies;
 using MediaBrowser.Controller.Library;
@@ -57,7 +58,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new string[] { });
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string> { });
 
             BoxSetProviderFromXml.Current.SetLastRefreshed(item, DateTime.UtcNow);
         }
diff --git a/MediaBrowser.Providers/Savers/EpisodeXmlSaver.cs b/MediaBrowser.Providers/Savers/EpisodeXmlSaver.cs
index d90cb94c29..854c508b92 100644
--- a/MediaBrowser.Providers/Savers/EpisodeXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/EpisodeXmlSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
@@ -87,7 +88,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new[]
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string>
                 {
                     "FirstAired",
                     "SeasonNumber",
diff --git a/MediaBrowser.Providers/Savers/FolderXmlSaver.cs b/MediaBrowser.Providers/Savers/FolderXmlSaver.cs
index 23339ec756..6e95cc8c5e 100644
--- a/MediaBrowser.Providers/Savers/FolderXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/FolderXmlSaver.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
@@ -77,7 +78,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new string[] { });
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string> { });
 
             FolderProviderFromXml.Current.SetLastRefreshed(item, DateTime.UtcNow);
         }
diff --git a/MediaBrowser.Providers/Savers/GameXmlSaver.cs b/MediaBrowser.Providers/Savers/GameXmlSaver.cs
index 41bd364c85..1e654f72f9 100644
--- a/MediaBrowser.Providers/Savers/GameXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/GameXmlSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Providers.Movies;
@@ -66,7 +67,7 @@ namespace MediaBrowser.Providers.Savers
 
             if (!string.IsNullOrEmpty(game.GameSystem))
             {
-                builder.Append("<GameSystem><![CDATA[" + game.GameSystem + "]]></GameSystem>");
+                builder.Append("<GameSystem>" + SecurityElement.Escape(game.GameSystem) + "</GameSystem>");
             }
             
             XmlSaverHelpers.AddCommonNodes(item, builder);
@@ -75,7 +76,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new[]
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string>
                 {
                     "Players",
                     "GameSystem"
diff --git a/MediaBrowser.Providers/Savers/MovieXmlSaver.cs b/MediaBrowser.Providers/Savers/MovieXmlSaver.cs
index 2402bcd7f5..761bcefd17 100644
--- a/MediaBrowser.Providers/Savers/MovieXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/MovieXmlSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Movies;
 using MediaBrowser.Controller.Library;
@@ -103,7 +104,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new[]
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string>
                 {
                     "IMDBrating",
                     "Description",
diff --git a/MediaBrowser.Providers/Savers/PersonXmlSaver.cs b/MediaBrowser.Providers/Savers/PersonXmlSaver.cs
index 1b1377ac82..92f6db29b1 100644
--- a/MediaBrowser.Providers/Savers/PersonXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/PersonXmlSaver.cs
@@ -1,4 +1,5 @@
-using System.Security;
+using System.Collections.Generic;
+using System.Security;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Providers.Movies;
@@ -57,7 +58,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new[]
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string>
                 {
                     "PlaceOfBirth"
                 });
diff --git a/MediaBrowser.Providers/Savers/SeasonXmlSaver.cs b/MediaBrowser.Providers/Savers/SeasonXmlSaver.cs
index 97e8b671f3..e484b3d390 100644
--- a/MediaBrowser.Providers/Savers/SeasonXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/SeasonXmlSaver.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.TV;
@@ -57,7 +58,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new string[] { });
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string> { });
 
             SeasonProviderFromXml.Current.SetLastRefreshed(item, DateTime.UtcNow);
         }
diff --git a/MediaBrowser.Providers/Savers/SeriesXmlSaver.cs b/MediaBrowser.Providers/Savers/SeriesXmlSaver.cs
index 6b9828576f..a4ff9c7d8f 100644
--- a/MediaBrowser.Providers/Savers/SeriesXmlSaver.cs
+++ b/MediaBrowser.Providers/Savers/SeriesXmlSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System.Collections.Generic;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
@@ -105,7 +106,7 @@ namespace MediaBrowser.Providers.Savers
 
             var xmlFilePath = GetSavePath(item);
 
-            XmlSaverHelpers.Save(builder, xmlFilePath, new[]
+            XmlSaverHelpers.Save(builder, xmlFilePath, new List<string>
                 {
                     "id", 
                     "SeriesName",
diff --git a/MediaBrowser.Providers/Savers/XmlSaverHelpers.cs b/MediaBrowser.Providers/Savers/XmlSaverHelpers.cs
index cea7cf9268..338447c100 100644
--- a/MediaBrowser.Providers/Savers/XmlSaverHelpers.cs
+++ b/MediaBrowser.Providers/Savers/XmlSaverHelpers.cs
@@ -29,13 +29,11 @@ namespace MediaBrowser.Providers.Savers
         /// <param name="xml">The XML.</param>
         /// <param name="path">The path.</param>
         /// <param name="xmlTagsUsed">The XML tags used.</param>
-        public static void Save(StringBuilder xml, string path, IEnumerable<string> xmlTagsUsed)
+        public static void Save(StringBuilder xml, string path, List<string> xmlTagsUsed)
         {
             if (File.Exists(path))
             {
-                var tags = xmlTagsUsed.ToList();
-
-                tags.AddRange(new[]
+                xmlTagsUsed.AddRange(new[]
                 {
                     "MediaInfo",
                     "ContentRating",
@@ -88,7 +86,7 @@ namespace MediaBrowser.Providers.Savers
                 });
 
                 var position = xml.ToString().LastIndexOf("</", StringComparison.OrdinalIgnoreCase);
-                xml.Insert(position, GetCustomTags(path, tags));
+                xml.Insert(position, GetCustomTags(path, xmlTagsUsed));
             }
 
             var xmlDocument = new XmlDocument();
@@ -142,17 +140,46 @@ namespace MediaBrowser.Providers.Savers
         /// <param name="path">The path.</param>
         /// <param name="xmlTagsUsed">The XML tags used.</param>
         /// <returns>System.String.</returns>
-        private static string GetCustomTags(string path, ICollection<string> xmlTagsUsed)
+        private static string GetCustomTags(string path, IEnumerable<string> xmlTagsUsed)
         {
-            var doc = new XmlDocument();
-            doc.Load(path);
+            var settings = new XmlReaderSettings
+            {
+                CheckCharacters = false,
+                IgnoreProcessingInstructions = true,
+                IgnoreComments = true,
+                ValidationType = ValidationType.None
+            };
 
-            var nodes = doc.DocumentElement.ChildNodes.Cast<XmlNode>()
-                .Where(i => !xmlTagsUsed.Contains(i.Name))
-                .Select(i => i.OuterXml)
-                .ToArray();
+            var tagsDictionary = xmlTagsUsed.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
 
-            return string.Join(Environment.NewLine, nodes);
+            var builder = new StringBuilder();
+
+            using (var streamReader = new StreamReader(path, Encoding.UTF8))
+            {
+                // Use XmlReader for best performance
+                using (var reader = XmlReader.Create(streamReader, settings))
+                {
+                    reader.MoveToContent();
+
+                    // Loop through each element
+                    while (reader.Read())
+                    {
+                        if (reader.NodeType == XmlNodeType.Element)
+                        {
+                            if (!tagsDictionary.ContainsKey(reader.Name))
+                            {
+                                builder.AppendLine(reader.ReadOuterXml());
+                            }
+                            else
+                            {
+                                reader.Skip();
+                            }
+                        }
+                    }
+                }
+            }
+            
+            return builder.ToString();
         }
 
         /// <summary>
diff --git a/MediaBrowser.Server.Implementations/MediaEncoder/MediaEncoder.cs b/MediaBrowser.Server.Implementations/MediaEncoder/MediaEncoder.cs
index b24c9a5cae..2f353b8c08 100644
--- a/MediaBrowser.Server.Implementations/MediaEncoder/MediaEncoder.cs
+++ b/MediaBrowser.Server.Implementations/MediaEncoder/MediaEncoder.cs
@@ -57,7 +57,7 @@ namespace MediaBrowser.Server.Implementations.MediaEncoder
         /// <summary>
         /// The FF probe resource pool
         /// </summary>
-        private readonly SemaphoreSlim _ffProbeResourcePool = new SemaphoreSlim(2, 2);
+        private readonly SemaphoreSlim _ffProbeResourcePool = new SemaphoreSlim(1, 1);
 
         public string FFMpegPath { get; private set; }
 
diff --git a/MediaBrowser.Server.Implementations/ScheduledTasks/ChapterImagesTask.cs b/MediaBrowser.Server.Implementations/ScheduledTasks/ChapterImagesTask.cs
index d9b88368b3..4829dc4055 100644
--- a/MediaBrowser.Server.Implementations/ScheduledTasks/ChapterImagesTask.cs
+++ b/MediaBrowser.Server.Implementations/ScheduledTasks/ChapterImagesTask.cs
@@ -159,6 +159,10 @@ namespace MediaBrowser.Server.Implementations.ScheduledTasks
             {
                 previouslyFailedImages = new List<string>();
             }
+            catch (DirectoryNotFoundException)
+            {
+                previouslyFailedImages = new List<string>();
+            }
 
             foreach (var video in videos)
             {