diff --git a/svt-av1_gui/AdvancedOptions.Designer.vb b/svt-av1_gui/AdvancedOptions.Designer.vb
new file mode 100644
index 0000000..c04ba51
--- /dev/null
+++ b/svt-av1_gui/AdvancedOptions.Designer.vb
@@ -0,0 +1,162 @@
+<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
+Partial Class AdvancedOptions
+    Inherits System.Windows.Forms.Form
+
+    'Form overrides dispose to clean up the component list.
+    <System.Diagnostics.DebuggerNonUserCode()> _
+    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
+        Try
+            If disposing AndAlso components IsNot Nothing Then
+                components.Dispose()
+            End If
+        Finally
+            MyBase.Dispose(disposing)
+        End Try
+    End Sub
+
+    'Required by the Windows Form Designer
+    Private components As System.ComponentModel.IContainer
+
+    'NOTE: The following procedure is required by the Windows Form Designer
+    'It can be modified using the Windows Form Designer.  
+    'Do not modify it using the code editor.
+    <System.Diagnostics.DebuggerStepThrough()> _
+    Private Sub InitializeComponent()
+        Me.HME2 = New System.Windows.Forms.CheckBox()
+        Me.HME1 = New System.Windows.Forms.CheckBox()
+        Me.HME0 = New System.Windows.Forms.CheckBox()
+        Me.HME = New System.Windows.Forms.CheckBox()
+        Me.GroupBox1 = New System.Windows.Forms.GroupBox()
+        Me.GroupBox2 = New System.Windows.Forms.GroupBox()
+        Me.OpenGOP = New System.Windows.Forms.RadioButton()
+        Me.ClosedGOP = New System.Windows.Forms.RadioButton()
+        Me.CloseBtn = New System.Windows.Forms.Button()
+        Me.GroupBox1.SuspendLayout()
+        Me.GroupBox2.SuspendLayout()
+        Me.SuspendLayout()
+        '
+        'HME2
+        '
+        Me.HME2.AutoSize = True
+        Me.HME2.Location = New System.Drawing.Point(182, 19)
+        Me.HME2.Name = "HME2"
+        Me.HME2.Size = New System.Drawing.Size(56, 17)
+        Me.HME2.TabIndex = 43
+        Me.HME2.Text = "HME2"
+        Me.HME2.UseVisualStyleBackColor = True
+        '
+        'HME1
+        '
+        Me.HME1.AutoSize = True
+        Me.HME1.Location = New System.Drawing.Point(120, 19)
+        Me.HME1.Name = "HME1"
+        Me.HME1.Size = New System.Drawing.Size(56, 17)
+        Me.HME1.TabIndex = 42
+        Me.HME1.Text = "HME1"
+        Me.HME1.UseVisualStyleBackColor = True
+        '
+        'HME0
+        '
+        Me.HME0.AutoSize = True
+        Me.HME0.Location = New System.Drawing.Point(62, 19)
+        Me.HME0.Name = "HME0"
+        Me.HME0.Size = New System.Drawing.Size(56, 17)
+        Me.HME0.TabIndex = 41
+        Me.HME0.Text = "HME0"
+        Me.HME0.UseVisualStyleBackColor = True
+        '
+        'HME
+        '
+        Me.HME.AutoSize = True
+        Me.HME.Location = New System.Drawing.Point(6, 19)
+        Me.HME.Name = "HME"
+        Me.HME.Size = New System.Drawing.Size(50, 17)
+        Me.HME.TabIndex = 40
+        Me.HME.Text = "HME"
+        Me.HME.UseVisualStyleBackColor = True
+        '
+        'GroupBox1
+        '
+        Me.GroupBox1.Controls.Add(Me.HME)
+        Me.GroupBox1.Controls.Add(Me.HME2)
+        Me.GroupBox1.Controls.Add(Me.HME0)
+        Me.GroupBox1.Controls.Add(Me.HME1)
+        Me.GroupBox1.Location = New System.Drawing.Point(12, 12)
+        Me.GroupBox1.Name = "GroupBox1"
+        Me.GroupBox1.Size = New System.Drawing.Size(247, 53)
+        Me.GroupBox1.TabIndex = 44
+        Me.GroupBox1.TabStop = False
+        Me.GroupBox1.Text = "HME"
+        '
+        'GroupBox2
+        '
+        Me.GroupBox2.Controls.Add(Me.ClosedGOP)
+        Me.GroupBox2.Controls.Add(Me.OpenGOP)
+        Me.GroupBox2.Location = New System.Drawing.Point(12, 71)
+        Me.GroupBox2.Name = "GroupBox2"
+        Me.GroupBox2.Size = New System.Drawing.Size(247, 46)
+        Me.GroupBox2.TabIndex = 45
+        Me.GroupBox2.TabStop = False
+        Me.GroupBox2.Text = "GOP Type:"
+        '
+        'OpenGOP
+        '
+        Me.OpenGOP.AutoSize = True
+        Me.OpenGOP.Location = New System.Drawing.Point(6, 19)
+        Me.OpenGOP.Name = "OpenGOP"
+        Me.OpenGOP.Size = New System.Drawing.Size(51, 17)
+        Me.OpenGOP.TabIndex = 0
+        Me.OpenGOP.TabStop = True
+        Me.OpenGOP.Text = "Open"
+        Me.OpenGOP.UseVisualStyleBackColor = True
+        '
+        'ClosedGOP
+        '
+        Me.ClosedGOP.AutoSize = True
+        Me.ClosedGOP.Location = New System.Drawing.Point(63, 19)
+        Me.ClosedGOP.Name = "ClosedGOP"
+        Me.ClosedGOP.Size = New System.Drawing.Size(57, 17)
+        Me.ClosedGOP.TabIndex = 1
+        Me.ClosedGOP.TabStop = True
+        Me.ClosedGOP.Text = "Closed"
+        Me.ClosedGOP.UseVisualStyleBackColor = True
+        '
+        'CloseBtn
+        '
+        Me.CloseBtn.Location = New System.Drawing.Point(12, 134)
+        Me.CloseBtn.Name = "CloseBtn"
+        Me.CloseBtn.Size = New System.Drawing.Size(247, 23)
+        Me.CloseBtn.TabIndex = 46
+        Me.CloseBtn.Text = "Close"
+        Me.CloseBtn.UseVisualStyleBackColor = True
+        '
+        'AdvancedOptions
+        '
+        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
+        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
+        Me.ClientSize = New System.Drawing.Size(278, 169)
+        Me.Controls.Add(Me.CloseBtn)
+        Me.Controls.Add(Me.GroupBox2)
+        Me.Controls.Add(Me.GroupBox1)
+        Me.MaximizeBox = False
+        Me.MinimizeBox = False
+        Me.Name = "AdvancedOptions"
+        Me.Text = "Advanced Options"
+        Me.GroupBox1.ResumeLayout(False)
+        Me.GroupBox1.PerformLayout()
+        Me.GroupBox2.ResumeLayout(False)
+        Me.GroupBox2.PerformLayout()
+        Me.ResumeLayout(False)
+
+    End Sub
+
+    Friend WithEvents HME2 As CheckBox
+    Friend WithEvents HME1 As CheckBox
+    Friend WithEvents HME0 As CheckBox
+    Friend WithEvents HME As CheckBox
+    Friend WithEvents GroupBox1 As GroupBox
+    Friend WithEvents GroupBox2 As GroupBox
+    Friend WithEvents ClosedGOP As RadioButton
+    Friend WithEvents OpenGOP As RadioButton
+    Friend WithEvents CloseBtn As Button
+End Class
diff --git a/svt-av1_gui/AdvancedOptions.resx b/svt-av1_gui/AdvancedOptions.resx
new file mode 100644
index 0000000..1af7de1
--- /dev/null
+++ b/svt-av1_gui/AdvancedOptions.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/svt-av1_gui/AdvancedOptions.vb b/svt-av1_gui/AdvancedOptions.vb
new file mode 100644
index 0000000..14f14e5
--- /dev/null
+++ b/svt-av1_gui/AdvancedOptions.vb
@@ -0,0 +1,36 @@
+Public Class AdvancedOptions
+    Private Sub HME_CheckedChanged(sender As Object, e As EventArgs) Handles HME.CheckedChanged
+        My.Settings.HME = HME.Checked
+        My.Settings.Save()
+    End Sub
+
+    Private Sub HME0_CheckedChanged(sender As Object, e As EventArgs) Handles HME0.CheckedChanged
+        My.Settings.HME0 = HME0.Checked
+        My.Settings.Save()
+    End Sub
+
+    Private Sub HME1_CheckedChanged(sender As Object, e As EventArgs) Handles HME1.CheckedChanged
+        My.Settings.HME1 = HME1.Checked
+        My.Settings.Save()
+    End Sub
+
+    Private Sub HME2_CheckedChanged(sender As Object, e As EventArgs) Handles HME2.CheckedChanged
+        My.Settings.HME2 = HME2.Checked
+        My.Settings.Save()
+    End Sub
+
+    Private Sub OpenGOP_CheckedChanged(sender As Object, e As EventArgs) Handles OpenGOP.CheckedChanged
+        My.Settings.OpenGOP = OpenGOP.Checked
+        My.Settings.Save()
+    End Sub
+
+    Private Sub ClosedGOP_CheckedChanged(sender As Object, e As EventArgs) Handles ClosedGOP.CheckedChanged
+        My.Settings.ClosedGOP = ClosedGOP.Checked
+        My.Settings.Save()
+
+    End Sub
+
+    Private Sub CloseBtn_Click(sender As Object, e As EventArgs) Handles CloseBtn.Click
+        Me.Close()
+    End Sub
+End Class
\ No newline at end of file
diff --git a/svt-av1_gui/App.config b/svt-av1_gui/App.config
index b53582d..a684c32 100644
--- a/svt-av1_gui/App.config
+++ b/svt-av1_gui/App.config
@@ -55,6 +55,12 @@
             <setting name="NoPipes" serializeAs="String">
                 <value>False</value>
             </setting>
+            <setting name="OpenGOP" serializeAs="String">
+                <value>False</value>
+            </setting>
+            <setting name="ClosedGOP" serializeAs="String">
+                <value>True</value>
+            </setting>
         </svtav1_gui.My.MySettings>
     </userSettings>
 </configuration>
diff --git a/svt-av1_gui/Form1.Designer.vb b/svt-av1_gui/Form1.Designer.vb
index 2f64713..cecbe24 100644
--- a/svt-av1_gui/Form1.Designer.vb
+++ b/svt-av1_gui/Form1.Designer.vb
@@ -39,10 +39,6 @@ Partial Class Form1
         Me.Label11 = New System.Windows.Forms.Label()
         Me.rows = New System.Windows.Forms.NumericUpDown()
         Me.Label10 = New System.Windows.Forms.Label()
-        Me.HME2 = New System.Windows.Forms.CheckBox()
-        Me.HME1 = New System.Windows.Forms.CheckBox()
-        Me.HME0 = New System.Windows.Forms.CheckBox()
-        Me.HME = New System.Windows.Forms.CheckBox()
         Me.Label3 = New System.Windows.Forms.Label()
         Me.quantizer = New System.Windows.Forms.NumericUpDown()
         Me.audioBitrate = New System.Windows.Forms.NumericUpDown()
@@ -56,13 +52,14 @@ Partial Class Form1
         Me.Label14 = New System.Windows.Forms.Label()
         Me.ProgressLog = New System.Windows.Forms.RichTextBox()
         Me.SplitContainer1 = New System.Windows.Forms.SplitContainer()
+        Me.OutputFolderBrowseBtn = New System.Windows.Forms.Button()
+        Me.InputFolderBrowseBtn = New System.Windows.Forms.Button()
         Me.NoPipes = New System.Windows.Forms.CheckBox()
         Me.ffmpegVersionLabel = New System.Windows.Forms.Label()
         Me.PauseResumeButton = New System.Windows.Forms.Button()
         Me.ClearLogBtn = New System.Windows.Forms.Button()
         Me.SaveLogBtn = New System.Windows.Forms.Button()
-        Me.InputFolderBrowseBtn = New System.Windows.Forms.Button()
-        Me.OutputFolderBrowseBtn = New System.Windows.Forms.Button()
+        Me.AdvancedOptionsButton = New System.Windows.Forms.Button()
         Me.GroupBox1.SuspendLayout()
         CType(Me.columns, System.ComponentModel.ISupportInitialize).BeginInit()
         CType(Me.rows, System.ComponentModel.ISupportInitialize).BeginInit()
@@ -167,6 +164,7 @@ Partial Class Form1
         Me.GroupBox1.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
             Or System.Windows.Forms.AnchorStyles.Left) _
             Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
+        Me.GroupBox1.Controls.Add(Me.AdvancedOptionsButton)
         Me.GroupBox1.Controls.Add(Me.TwoPassEncoding)
         Me.GroupBox1.Controls.Add(Me.AdditionalArguments)
         Me.GroupBox1.Controls.Add(Me.Label4)
@@ -174,10 +172,6 @@ Partial Class Form1
         Me.GroupBox1.Controls.Add(Me.Label11)
         Me.GroupBox1.Controls.Add(Me.rows)
         Me.GroupBox1.Controls.Add(Me.Label10)
-        Me.GroupBox1.Controls.Add(Me.HME2)
-        Me.GroupBox1.Controls.Add(Me.HME1)
-        Me.GroupBox1.Controls.Add(Me.HME0)
-        Me.GroupBox1.Controls.Add(Me.HME)
         Me.GroupBox1.Controls.Add(Me.Label3)
         Me.GroupBox1.Controls.Add(Me.quantizer)
         Me.GroupBox1.Controls.Add(Me.audioBitrate)
@@ -194,7 +188,7 @@ Partial Class Form1
         'TwoPassEncoding
         '
         Me.TwoPassEncoding.AutoSize = True
-        Me.TwoPassEncoding.Location = New System.Drawing.Point(247, 58)
+        Me.TwoPassEncoding.Location = New System.Drawing.Point(304, 35)
         Me.TwoPassEncoding.Name = "TwoPassEncoding"
         Me.TwoPassEncoding.Size = New System.Drawing.Size(58, 17)
         Me.TwoPassEncoding.TabIndex = 46
@@ -205,7 +199,7 @@ Partial Class Form1
         '
         Me.AdditionalArguments.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
             Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
-        Me.AdditionalArguments.Location = New System.Drawing.Point(9, 98)
+        Me.AdditionalArguments.Location = New System.Drawing.Point(9, 82)
         Me.AdditionalArguments.Name = "AdditionalArguments"
         Me.AdditionalArguments.Size = New System.Drawing.Size(415, 20)
         Me.AdditionalArguments.TabIndex = 45
@@ -213,7 +207,7 @@ Partial Class Form1
         'Label4
         '
         Me.Label4.AutoSize = True
-        Me.Label4.Location = New System.Drawing.Point(6, 82)
+        Me.Label4.Location = New System.Drawing.Point(6, 66)
         Me.Label4.Name = "Label4"
         Me.Label4.Size = New System.Drawing.Size(108, 13)
         Me.Label4.TabIndex = 44
@@ -253,50 +247,6 @@ Partial Class Form1
         Me.Label10.TabIndex = 40
         Me.Label10.Text = "Rows:"
         '
-        'HME2
-        '
-        Me.HME2.AutoSize = True
-        Me.HME2.Location = New System.Drawing.Point(185, 58)
-        Me.HME2.Name = "HME2"
-        Me.HME2.Size = New System.Drawing.Size(56, 17)
-        Me.HME2.TabIndex = 39
-        Me.HME2.Text = "HME2"
-        Me.HME2.UseVisualStyleBackColor = True
-        '
-        'HME1
-        '
-        Me.HME1.AutoSize = True
-        Me.HME1.Location = New System.Drawing.Point(123, 58)
-        Me.HME1.Name = "HME1"
-        Me.HME1.Size = New System.Drawing.Size(56, 17)
-        Me.HME1.TabIndex = 38
-        Me.HME1.Text = "HME1"
-        Me.HME1.UseVisualStyleBackColor = True
-        '
-        'HME0
-        '
-        Me.HME0.AutoSize = True
-        Me.HME0.Checked = True
-        Me.HME0.CheckState = System.Windows.Forms.CheckState.Checked
-        Me.HME0.Location = New System.Drawing.Point(65, 58)
-        Me.HME0.Name = "HME0"
-        Me.HME0.Size = New System.Drawing.Size(56, 17)
-        Me.HME0.TabIndex = 37
-        Me.HME0.Text = "HME0"
-        Me.HME0.UseVisualStyleBackColor = True
-        '
-        'HME
-        '
-        Me.HME.AutoSize = True
-        Me.HME.Checked = True
-        Me.HME.CheckState = System.Windows.Forms.CheckState.Checked
-        Me.HME.Location = New System.Drawing.Point(9, 58)
-        Me.HME.Name = "HME"
-        Me.HME.Size = New System.Drawing.Size(50, 17)
-        Me.HME.TabIndex = 36
-        Me.HME.Text = "HME"
-        Me.HME.UseVisualStyleBackColor = True
-        '
         'Label3
         '
         Me.Label3.AutoSize = True
@@ -342,7 +292,6 @@ Partial Class Form1
         Me.speed.Name = "speed"
         Me.speed.Size = New System.Drawing.Size(50, 20)
         Me.speed.TabIndex = 6
-        Me.speed.Value = New Decimal(New Integer() {8, 0, 0, 0})
         '
         'Label7
         '
@@ -454,6 +403,26 @@ Partial Class Form1
         Me.SplitContainer1.SplitterDistance = 448
         Me.SplitContainer1.TabIndex = 19
         '
+        'OutputFolderBrowseBtn
+        '
+        Me.OutputFolderBrowseBtn.Anchor = CType((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
+        Me.OutputFolderBrowseBtn.Location = New System.Drawing.Point(345, 65)
+        Me.OutputFolderBrowseBtn.Name = "OutputFolderBrowseBtn"
+        Me.OutputFolderBrowseBtn.Size = New System.Drawing.Size(91, 23)
+        Me.OutputFolderBrowseBtn.TabIndex = 49
+        Me.OutputFolderBrowseBtn.Text = "Browse Folder"
+        Me.OutputFolderBrowseBtn.UseVisualStyleBackColor = True
+        '
+        'InputFolderBrowseBtn
+        '
+        Me.InputFolderBrowseBtn.Anchor = CType((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
+        Me.InputFolderBrowseBtn.Location = New System.Drawing.Point(345, 23)
+        Me.InputFolderBrowseBtn.Name = "InputFolderBrowseBtn"
+        Me.InputFolderBrowseBtn.Size = New System.Drawing.Size(91, 23)
+        Me.InputFolderBrowseBtn.TabIndex = 48
+        Me.InputFolderBrowseBtn.Text = "Browse Folder"
+        Me.InputFolderBrowseBtn.UseVisualStyleBackColor = True
+        '
         'NoPipes
         '
         Me.NoPipes.AutoSize = True
@@ -505,25 +474,15 @@ Partial Class Form1
         Me.SaveLogBtn.Text = "Save Log"
         Me.SaveLogBtn.UseVisualStyleBackColor = True
         '
-        'InputFolderBrowseBtn
+        'AdvancedOptionsButton
         '
-        Me.InputFolderBrowseBtn.Anchor = CType((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
-        Me.InputFolderBrowseBtn.Location = New System.Drawing.Point(345, 23)
-        Me.InputFolderBrowseBtn.Name = "InputFolderBrowseBtn"
-        Me.InputFolderBrowseBtn.Size = New System.Drawing.Size(91, 23)
-        Me.InputFolderBrowseBtn.TabIndex = 48
-        Me.InputFolderBrowseBtn.Text = "Browse Folder"
-        Me.InputFolderBrowseBtn.UseVisualStyleBackColor = True
-        '
-        'OutputFolderBrowseBtn
-        '
-        Me.OutputFolderBrowseBtn.Anchor = CType((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
-        Me.OutputFolderBrowseBtn.Location = New System.Drawing.Point(345, 65)
-        Me.OutputFolderBrowseBtn.Name = "OutputFolderBrowseBtn"
-        Me.OutputFolderBrowseBtn.Size = New System.Drawing.Size(91, 23)
-        Me.OutputFolderBrowseBtn.TabIndex = 49
-        Me.OutputFolderBrowseBtn.Text = "Browse Folder"
-        Me.OutputFolderBrowseBtn.UseVisualStyleBackColor = True
+        Me.AdvancedOptionsButton.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
+        Me.AdvancedOptionsButton.Location = New System.Drawing.Point(304, 116)
+        Me.AdvancedOptionsButton.Name = "AdvancedOptionsButton"
+        Me.AdvancedOptionsButton.Size = New System.Drawing.Size(120, 23)
+        Me.AdvancedOptionsButton.TabIndex = 47
+        Me.AdvancedOptionsButton.Text = "Advanced Options"
+        Me.AdvancedOptionsButton.UseVisualStyleBackColor = True
         '
         'Form1
         '
@@ -578,10 +537,6 @@ Partial Class Form1
     Friend WithEvents quantizer As NumericUpDown
     Friend WithEvents ffmpegVersionLabel As Label
     Friend WithEvents Label3 As Label
-    Friend WithEvents HME2 As CheckBox
-    Friend WithEvents HME1 As CheckBox
-    Friend WithEvents HME0 As CheckBox
-    Friend WithEvents HME As CheckBox
     Friend WithEvents columns As NumericUpDown
     Friend WithEvents Label11 As Label
     Friend WithEvents rows As NumericUpDown
@@ -592,4 +547,5 @@ Partial Class Form1
     Friend WithEvents NoPipes As CheckBox
     Friend WithEvents OutputFolderBrowseBtn As Button
     Friend WithEvents InputFolderBrowseBtn As Button
+    Friend WithEvents AdvancedOptionsButton As Button
 End Class
diff --git a/svt-av1_gui/Form1.vb b/svt-av1_gui/Form1.vb
index 4fdcd6b..9a91e6d 100644
--- a/svt-av1_gui/Form1.vb
+++ b/svt-av1_gui/Form1.vb
@@ -63,10 +63,7 @@ Public Class Form1
         quantizer.Enabled = False
         rows.Enabled = False
         columns.Enabled = False
-        HME.Enabled = False
-        HME0.Enabled = False
-        HME1.Enabled = False
-        HME2.Enabled = False
+        AdvancedOptionsButton.Enabled = False
         AdditionalArguments.Enabled = False
         speed.Enabled = False
         tempLocationPath.Enabled = False
@@ -165,10 +162,7 @@ Public Class Form1
                                  quantizer.Enabled = True
                                  rows.Enabled = True
                                  columns.Enabled = True
-                                 HME.Enabled = True
-                                 HME0.Enabled = True
-                                 HME1.Enabled = True
-                                 HME2.Enabled = True
+                                 AdvancedOptionsButton.Enabled = True
                                  AdditionalArguments.Enabled = True
                                  tempLocationPath.Enabled = True
                                  BrowseTempLocation.Enabled = True
@@ -184,6 +178,10 @@ Public Class Form1
         MsgBox("Finished")
     End Function
     Private Function Run_svtav1(Input_File As String, Output_File As String, SecondPassEnabled As Boolean, Optional SecondPass As Boolean = False)
+        If IO.File.Exists(My.Settings.tempFolder + "/FirstPassComplete") And SecondPass = False Then
+            Run_svtav1(Input_File, Output_File, SecondPassEnabled, True)
+            Return True
+        End If
         UpdateLog("Getting Video Info")
         Dim InputPipe As New IO.Pipes.NamedPipeServerStream("in.y4m", IO.Pipes.PipeDirection.Out, -1, IO.Pipes.PipeTransmissionMode.Byte, IO.Pipes.PipeOptions.Asynchronous, PipeBuffer, 0)
         Dim SourceFrameCount As String = String.Empty
@@ -237,6 +235,10 @@ Public Class Form1
                     Exit While
                 End If
             End While
+            If SourceFrameCount = String.Empty Then
+                UpdateLog("This video cannot be encoded using pipes.")
+                Return True
+            End If
             If SourceFrameNum = String.Empty And SourceFrameDen = String.Empty And Not Convert.ToDouble(SourceFrameRate) Mod 1 = 0 Then
                 SourceFrameNum = Convert.ToString(Convert.ToDouble(SourceFrameRate) * 1000)
                 SourceFrameDen = "1000"
@@ -252,6 +254,7 @@ Public Class Form1
             If My.Settings.HME0 Then SVTAV1CommandLineString += " -hme-l0 1 " Else SVTAV1CommandLineString += " -hme-l0 0 "
             If My.Settings.HME1 Then SVTAV1CommandLineString += " -hme-l1 1 " Else SVTAV1CommandLineString += " -hme-l1 0 "
             If My.Settings.HME2 Then SVTAV1CommandLineString += " -hme-l2 1 " Else SVTAV1CommandLineString += " -hme-l2 0 "
+            If My.Settings.ClosedGOP Then SVTAV1CommandLineString += " -irefresh-type 2"
             If SourceFrameNum = String.Empty And SourceFrameDen = String.Empty Then
                 SVTAV1CommandLineString += " -fps " + SourceFrameRate
             Else
@@ -263,12 +266,12 @@ Public Class Form1
                     SVTAV1CommandLineString += " -enc-mode-2p " + My.Settings.speed.ToString() + " " + My.Settings.AdditionalArguments + " -n " + SourceFrameCount + " -w " + SourceWidth + " -h " + SourceHeight + " -i ""\\.\pipe\in.y4m"" -output-stat-file """ + My.Settings.tempFolder + "/OutputStatFile"""
                 Else
                     UpdateLog("Performing Second Pass Encoding")
-                    SVTAV1CommandLineString += " -enc-mode-2p " + My.Settings.speed.ToString() + "" + My.Settings.AdditionalArguments + " -n " + SourceFrameCount + " -w " + SourceWidth + " -h " + SourceHeight + " -i ""\\.\pipe\in.y4m"" -input-stat-file """ + My.Settings.tempFolder + "/OutputStatFile"" -b """ + Output_File + """"
+                    SVTAV1CommandLineString += " -enc-mode-2p " + My.Settings.speed.ToString() + " " + My.Settings.AdditionalArguments + " -n " + SourceFrameCount + " -w " + SourceWidth + " -h " + SourceHeight + " -i ""\\.\pipe\in.y4m"" -input-stat-file """ + My.Settings.tempFolder + "/OutputStatFile"" -b """ + Output_File + """"
                 End If
             Else
                 SVTAV1CommandLineString += " " + My.Settings.AdditionalArguments + " -n " + SourceFrameCount + " -w " + SourceWidth + " -h " + SourceHeight + " -i ""\\.\pipe\in.y4m"" -b """ + Output_File + """"
             End If
-            UpdateLog(SVTAV1CommandLineString)
+            UpdateLog("Using the following SVT-AV1 parameters: " + SVTAV1CommandLineString)
             svtav1Process.StartInfo.Arguments = SVTAV1CommandLineString
             svtav1Process.StartInfo.CreateNoWindow = True
             svtav1Process.StartInfo.RedirectStandardOutput = True
@@ -291,6 +294,8 @@ Public Class Form1
             WriteByteAsync(InputPipe, Input_File)
             svtav1Process.WaitForExit()
             If SecondPassEnabled And Not SecondPass Then
+                UpdateLog("First Pass encoding complete!")
+                IO.File.WriteAllText(My.Settings.tempFolder + "/FirstPassComplete", "")
                 Run_svtav1(Input_File, Output_File, SecondPassEnabled, True)
             Else
                 UpdateLog("Video encoding complete.")
@@ -326,7 +331,10 @@ Public Class Form1
         InputPipe.Dispose()
     End Sub
     Private Function Run_svtav1_no_pipe(Temp_Location As String, Output_File As String, SecondPassEnabled As Boolean, Optional SecondPass As Boolean = False)
-        UpdateLog("Getting Video Info")
+        If IO.File.Exists(My.Settings.tempFolder + "/FirstPassComplete") And SecondPass = False Then
+            Run_svtav1_no_pipe(Temp_Location, Output_File, SecondPassEnabled, True)
+            Return True
+        End If
         UpdateLog("Encoding Video")
         Using svtav1Process As New Process()
             svtav1Process.StartInfo.FileName = "SvtAv1EncApp.exe"
@@ -335,6 +343,7 @@ Public Class Form1
             If My.Settings.HME0 Then SVTAV1CommandLineString += " -hme-l0 1 " Else SVTAV1CommandLineString += " -hme-l0 0 "
             If My.Settings.HME1 Then SVTAV1CommandLineString += " -hme-l1 1 " Else SVTAV1CommandLineString += " -hme-l1 0 "
             If My.Settings.HME2 Then SVTAV1CommandLineString += " -hme-l2 1 " Else SVTAV1CommandLineString += " -hme-l2 0 "
+            If My.Settings.ClosedGOP Then SVTAV1CommandLineString += " -irefresh-type 2"
             If SecondPassEnabled Then
                 If Not SecondPass Then
                     UpdateLog("Performing First Pass Encoding")
@@ -346,7 +355,7 @@ Public Class Form1
             Else
                 SVTAV1CommandLineString += " " + My.Settings.AdditionalArguments + " -i """ + Temp_Location + "/y4m-video.y4m"" -b """ + Output_File + """"
             End If
-            UpdateLog(SVTAV1CommandLineString)
+            UpdateLog("Using the following SVT-AV1 parameters: " + SVTAV1CommandLineString)
             svtav1Process.StartInfo.Arguments = SVTAV1CommandLineString
             svtav1Process.StartInfo.CreateNoWindow = True
             svtav1Process.StartInfo.RedirectStandardOutput = True
@@ -368,6 +377,8 @@ Public Class Form1
             svtav1Process.BeginErrorReadLine()
             svtav1Process.WaitForExit()
             If SecondPassEnabled And Not SecondPass Then
+                UpdateLog("First Pass encoding complete!")
+                IO.File.WriteAllText(My.Settings.tempFolder + "/FirstPassComplete", "")
                 Run_svtav1_no_pipe(Temp_Location, Output_File, SecondPassEnabled, True)
             Else
                 UpdateLog("Video encoding complete.")
@@ -392,7 +403,13 @@ Public Class Form1
     End Function
     Private Function clean_temp_folder(tempFolder As String) As Boolean
         For Each File As String In IO.Directory.GetFiles(tempFolder)
-            If IO.Path.GetExtension(File) = ".ivf" Or IO.Path.GetFileName(File) = "y4m-video.y4m" Or IO.Path.GetFileName(File) = "opus-audio.opus" Or IO.Path.GetFileName(File) = "lock" Or IO.Path.GetFileName(File) = "InputVideo" Or IO.Path.GetFileName(File) = "OutputStatFile" Then
+            If IO.Path.GetExtension(File) = ".ivf" Or
+                IO.Path.GetFileName(File) = "y4m-video.y4m" Or
+                IO.Path.GetFileName(File) = "opus-audio.opus" Or
+                IO.Path.GetFileName(File) = "lock" Or
+                IO.Path.GetFileName(File) = "InputVideo" Or
+                IO.Path.GetFileName(File) = "OutputStatFile" Or
+                IO.Path.GetFileName(File) = "FirstPassComplete" Then
                 IO.File.Delete(File)
             End If
         Next
@@ -445,10 +462,12 @@ Public Class Form1
         speed.Value = My.Settings.speed
         rows.Value = My.Settings.TilingRows
         columns.Value = My.Settings.TilingColumns
-        HME.Checked = My.Settings.HME
-        HME0.Checked = My.Settings.HME0
-        HME1.Checked = My.Settings.HME1
-        HME2.Checked = My.Settings.HME2
+        AdvancedOptions.HME.Checked = My.Settings.HME
+        AdvancedOptions.HME0.Checked = My.Settings.HME0
+        AdvancedOptions.HME1.Checked = My.Settings.HME1
+        AdvancedOptions.HME2.Checked = My.Settings.HME2
+        AdvancedOptions.OpenGOP.Checked = My.Settings.OpenGOP
+        AdvancedOptions.ClosedGOP.Checked = My.Settings.ClosedGOP
         AdditionalArguments.Text = My.Settings.AdditionalArguments
         audioBitrate.Value = My.Settings.AudioBitrate
         tempLocationPath.Text = My.Settings.tempFolder
@@ -664,34 +683,6 @@ Public Class Form1
         End If
     End Sub
 
-    Private Sub HME_CheckedChanged(sender As Object, e As EventArgs) Handles HME.CheckedChanged
-        If GUILoaded Then
-            My.Settings.HME = HME.Checked
-            My.Settings.Save()
-        End If
-    End Sub
-
-    Private Sub HME0_CheckedChanged(sender As Object, e As EventArgs) Handles HME0.CheckedChanged
-        If GUILoaded Then
-            My.Settings.HME0 = HME0.Checked
-            My.Settings.Save()
-        End If
-    End Sub
-
-    Private Sub HME1_CheckedChanged(sender As Object, e As EventArgs) Handles HME1.CheckedChanged
-        If GUILoaded Then
-            My.Settings.HME1 = HME1.Checked
-            My.Settings.Save()
-        End If
-    End Sub
-
-    Private Sub HME2_CheckedChanged(sender As Object, e As EventArgs) Handles HME2.CheckedChanged
-        If GUILoaded Then
-            My.Settings.HME2 = HME2.Checked
-            My.Settings.Save()
-        End If
-    End Sub
-
     Private Sub AdditionalArguments_TextChanged(sender As Object, e As EventArgs) Handles AdditionalArguments.TextChanged
         If GUILoaded Then
             My.Settings.AdditionalArguments = AdditionalArguments.Text
@@ -742,4 +733,8 @@ Public Class Form1
             OutputTxt.Text = OutputBrowser.SelectedPath
         End If
     End Sub
+
+    Private Sub AdvancedOptionsButton_Click(sender As Object, e As EventArgs) Handles AdvancedOptionsButton.Click
+        AdvancedOptions.ShowDialog()
+    End Sub
 End Class
diff --git a/svt-av1_gui/My Project/Settings.Designer.vb b/svt-av1_gui/My Project/Settings.Designer.vb
index 5eff73d..a5c5943 100644
--- a/svt-av1_gui/My Project/Settings.Designer.vb	
+++ b/svt-av1_gui/My Project/Settings.Designer.vb	
@@ -15,7 +15,7 @@ Option Explicit On
 Namespace My
     
     <Global.System.Runtime.CompilerServices.CompilerGeneratedAttribute(),  _
-     Global.System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "16.4.0.0"),  _
+     Global.System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "16.5.0.0"),  _
      Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)>  _
     Partial Friend NotInheritable Class MySettings
         Inherits Global.System.Configuration.ApplicationSettingsBase
@@ -221,6 +221,30 @@ Namespace My
                 Me("NoPipes") = value
             End Set
         End Property
+        
+        <Global.System.Configuration.UserScopedSettingAttribute(),  _
+         Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
+         Global.System.Configuration.DefaultSettingValueAttribute("False")>  _
+        Public Property OpenGOP() As Boolean
+            Get
+                Return CType(Me("OpenGOP"),Boolean)
+            End Get
+            Set
+                Me("OpenGOP") = value
+            End Set
+        End Property
+        
+        <Global.System.Configuration.UserScopedSettingAttribute(),  _
+         Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
+         Global.System.Configuration.DefaultSettingValueAttribute("True")>  _
+        Public Property ClosedGOP() As Boolean
+            Get
+                Return CType(Me("ClosedGOP"),Boolean)
+            End Get
+            Set
+                Me("ClosedGOP") = value
+            End Set
+        End Property
     End Class
 End Namespace
 
diff --git a/svt-av1_gui/My Project/Settings.settings b/svt-av1_gui/My Project/Settings.settings
index 52ce7ed..a4ea9d4 100644
--- a/svt-av1_gui/My Project/Settings.settings	
+++ b/svt-av1_gui/My Project/Settings.settings	
@@ -44,5 +44,11 @@
     <Setting Name="NoPipes" Type="System.Boolean" Scope="User">
       <Value Profile="(Default)">False</Value>
     </Setting>
+    <Setting Name="OpenGOP" Type="System.Boolean" Scope="User">
+      <Value Profile="(Default)">False</Value>
+    </Setting>
+    <Setting Name="ClosedGOP" Type="System.Boolean" Scope="User">
+      <Value Profile="(Default)">True</Value>
+    </Setting>
   </Settings>
 </SettingsFile>
\ No newline at end of file
diff --git a/svt-av1_gui/svt-av1_gui.vbproj b/svt-av1_gui/svt-av1_gui.vbproj
index 4781017..becedfb 100644
--- a/svt-av1_gui/svt-av1_gui.vbproj
+++ b/svt-av1_gui/svt-av1_gui.vbproj
@@ -86,6 +86,12 @@
     <Import Include="System.Threading.Tasks" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="AdvancedOptions.Designer.vb">
+      <DependentUpon>AdvancedOptions.vb</DependentUpon>
+    </Compile>
+    <Compile Include="AdvancedOptions.vb">
+      <SubType>Form</SubType>
+    </Compile>
     <Compile Include="Form1.vb">
       <SubType>Form</SubType>
     </Compile>
@@ -111,6 +117,9 @@
     <Compile Include="SuspendResumeProcess.vb" />
   </ItemGroup>
   <ItemGroup>
+    <EmbeddedResource Include="AdvancedOptions.resx">
+      <DependentUpon>AdvancedOptions.vb</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="Form1.resx">
       <DependentUpon>Form1.vb</DependentUpon>
     </EmbeddedResource>