Add files

.gitignore

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+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# Build results
+bin/
+obj/
+
+.vs/
+
+*.user

App.xaml

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+<Application x:Class="LoadRetimer.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:LoadRetimer"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+    </Application.Resources>
+</Application>

App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace LoadRetimer {
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application {
+    }
+}

AssemblyInfo.cs

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+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]

FinalRetimeWindow.xaml

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+<Window x:Class="LoadRetimer.FinalRetimeWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:LoadRetimer"
+        mc:Ignorable="d"
+        Icon="/Icon.ico"
+        Title="Final Retime" Height="300" Width="500" ResizeMode="NoResize">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="2*" />
+            <RowDefinition Height="2*" />
+            <RowDefinition Height="2*" />
+            <RowDefinition Height="2*" />
+            <RowDefinition Height="1*" />
+            <RowDefinition Height="2*" />
+        </Grid.RowDefinitions>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="1*" />
+            <ColumnDefinition Width="1*" />
+        </Grid.ColumnDefinitions>
+        <Label Grid.Row="0" Grid.ColumnSpan="2" Content="Final Retime without loads:" HorizontalAlignment="Center" Margin="0,10,0,0" VerticalAlignment="Top" FontSize="25"/>
+        <Label x:Name="WOLoads" Grid.Row="1" Grid.ColumnSpan="2" Content="--:--.---" HorizontalAlignment="Center" Margin="0,10,0,0" VerticalAlignment="Top" FontSize="25"/>
+        <Label Grid.Row="2" Content="Retime with loads:" HorizontalAlignment="Center" Margin="0,10,0,0" VerticalAlignment="Top" FontSize="15"/>
+        <Label Grid.Row="2" Grid.Column="1" Content="Loads:" HorizontalAlignment="Center" Margin="0,10,0,0" VerticalAlignment="Top" FontSize="15"/>
+        <Label x:Name="WLoads" Grid.Row="3" Content="--:--.---" HorizontalAlignment="Center" Margin="0,10,0,0" VerticalAlignment="Top" FontSize="15"/>
+        <Label x:Name="Loads" Grid.Row="3" Grid.Column="1" Content="--:--.---" HorizontalAlignment="Center" Margin="0,10,0,0" VerticalAlignment="Top" FontSize="15"/>
+        <Label Grid.Row="4" Grid.ColumnSpan="2" Content="Generated with LoadRetimer v1.0.0" HorizontalAlignment="Center" FontSize="10" />
+        <Button Grid.Row="5" Grid.ColumnSpan="2" Content="Close" Click="Button_Click" />
+    </Grid>
+</Window>

FinalRetimeWindow.xaml.cs

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+using System;
+using System.Windows;
+
+namespace LoadRetimer {
+    /// <summary>
+    /// Interaction logic for Info.xaml
+    /// </summary>
+    public partial class FinalRetimeWindow : Window {
+        public FinalRetimeWindow() {
+            InitializeComponent();
+        }
+
+        public FinalRetimeWindow(TimeSpan wloads, TimeSpan loads) {
+            InitializeComponent();
+            WLoads.Content = String.Format("{0:hh\\:mm\\:ss\\.fff}", wloads);
+            Loads.Content = String.Format("{0:hh\\:mm\\:ss\\.fff}", loads);
+            WOLoads.Content = String.Format("{0:hh\\:mm\\:ss\\.fff}", wloads - loads);
+        }
+
+        private void Button_Click(object sender, RoutedEventArgs e) {
+            Close();
+        }
+    }
+}

Info.xaml

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+<Window x:Class="LoadRetimer.Info"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:LoadRetimer"
+        mc:Ignorable="d"
+        Icon="/Icon.ico"
+        Title="Info" Height="300" Width="500" ResizeMode="NoResize">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="5*" />
+            <RowDefinition Height="10*" />
+            <RowDefinition Height="2*" />
+            <RowDefinition Height="3*" />
+        </Grid.RowDefinitions>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="1*" />
+        </Grid.ColumnDefinitions>
+        <Label Content="Load Retimer v1.0.0" HorizontalAlignment="Center" Margin="0,10,0,0" VerticalAlignment="Top" FontSize="25"/>
+        <TextBlock Grid.Row="1" HorizontalAlignment="Center" TextWrapping="Wrap" VerticalAlignment="Top" Padding="2,0,0,0">
+            Controls:<LineBreak/>
+            A/D: go back/forwards 1 frame<LineBreak/>
+            Q/E: seek 10 seconds backwards/forwards<LineBreak/>
+            S/F: Set start/end of load<LineBreak/>
+            Space: Pause/Unpause<LineBreak/>
+        </TextBlock>
+        <Label Grid.Row="2" Content="© TheCodingBoy 2021" HorizontalAlignment="Center" />
+        <Button Grid.Row="3" Content="Close" Click="Button_Click" />
+    </Grid>
+</Window>

Info.xaml.cs

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+using System.Windows;
+
+namespace LoadRetimer {
+    /// <summary>
+    /// Interaction logic for Info.xaml
+    /// </summary>
+    public partial class Info : Window {
+        public Info() {
+            InitializeComponent();
+        }
+
+        private void Button_Click(object sender, RoutedEventArgs e) {
+            Close();
+        }
+    }
+}

LoadInfo.xaml

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+<UserControl x:Class="LoadRetimer.LoadInfo"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:local="clr-namespace:LoadRetimer"
+             mc:Ignorable="d" >
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="1*" />
+            <RowDefinition Height="1*" />
+        </Grid.RowDefinitions>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="1*" />
+            <ColumnDefinition Width="1*" />
+        </Grid.ColumnDefinitions>
+        <Label x:Name="LoadName" Content="Load" Grid.ColumnSpan="2" FontSize="20" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" />
+        <Separator VerticalAlignment="Top" Margin="0,49,0,0" Grid.ColumnSpan="2"/>
+        <Label x:Name="LoadFrameDurationF" Grid.Row="1" Content="---" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontWeight="Bold"/>
+        <Label x:Name="LoadFrameDurationS" Grid.Row="2" Content="---" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontWeight="Bold"/>
+        <Label x:Name="LoadFrameBeginS" Grid.Row="1" Grid.Column="1" Content="---" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
+        <Label x:Name="LoadFrameEndS" Grid.Row="2" Grid.Column="1" Content="---" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
+
+    </Grid>
+</UserControl>

LoadInfo.xaml.cs

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+using System;
+using System.Windows.Controls;
+
+namespace LoadRetimer {
+    /// <summary>
+    /// Interaction logic for LoadInfo.xaml
+    /// </summary>
+    public partial class LoadInfo : UserControl {
+
+        public long frameStart = -1;
+        public long frameEnd = -1;
+
+        public LoadInfo() {
+            InitializeComponent();
+            TryCalculate();
+        }
+
+        public LoadInfo(string name) {
+            InitializeComponent();
+            SetName(name);
+            TryCalculate();
+        }
+
+        public void SetName(string s) {
+            LoadName.Content = s;
+        }
+
+        public void SetBegin(TimeSpan begin) {
+            frameStart = (long) Math.Round(begin.TotalSeconds * MainWindow.frameRate);
+            TryCalculate();
+        }
+
+        public void SetEnd(TimeSpan begin) {
+            frameEnd = (long)Math.Round(begin.TotalSeconds * MainWindow.frameRate);
+            TryCalculate();
+        }
+
+        private void TryCalculate() {
+            LoadFrameDurationF.Content = "---";
+            LoadFrameDurationS.Content = "---";
+            if (frameStart > -1) {
+                LoadFrameBeginS.Content = String.Format("{0:hh\\:mm\\:ss\\.fff}", new TimeSpan((long)(frameStart / MainWindow.frameRate * 10_000_000)));
+            }
+            if (frameEnd > -1) {
+                LoadFrameEndS.Content = String.Format("{0:hh\\:mm\\:ss\\.fff}", new TimeSpan((long)(frameEnd / MainWindow.frameRate * 10_000_000)));
+            }
+            if (frameStart > -1 && frameEnd > -1) {
+                int frameDuration = FrameDuration();
+                LoadFrameDurationF.Content = String.Format("{0} frames", frameDuration);
+                LoadFrameDurationS.Content = String.Format("{0:hh\\:mm\\:ss\\.fff}", new TimeSpan((long)(frameDuration / MainWindow.frameRate * 10_000_000)));
+            }
+        }
+
+        public int FrameDuration() {
+            if (frameStart > -1 && frameEnd > -1) {
+                return (int)(frameEnd - frameStart);
+            } else {
+                return 0;
+            }
+        }
+    }
+}

LoadRetimer.csproj

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+<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net5.0-windows</TargetFramework>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="Icon.ico" />
+    <None Remove="Shader\brightness.ps" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FFME.Windows" Version="4.3.340" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Resource Include="Icon.ico" />
+    <Resource Include="Shader\brightness.ps" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Update="FinalRetimeWindow.xaml.cs">
+      <SubType>Code</SubType>
+    </Compile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Page Update="FinalRetimeWindow.xaml">
+      <XamlRuntime>$(DefaultXamlRuntime)</XamlRuntime>
+      <SubType>Designer</SubType>
+    </Page>
+  </ItemGroup>
+
+</Project>

LoadRetimer.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30711.63
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LoadRetimer", "LoadRetimer.csproj", "{02DDEF8A-6CCB-4597-A224-A8D4E9B6891B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{02DDEF8A-6CCB-4597-A224-A8D4E9B6891B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{02DDEF8A-6CCB-4597-A224-A8D4E9B6891B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{02DDEF8A-6CCB-4597-A224-A8D4E9B6891B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{02DDEF8A-6CCB-4597-A224-A8D4E9B6891B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {7AE40F5E-98E9-4649-9DB4-686C5DF8B16C}
+	EndGlobalSection
+EndGlobal

MainWindow.xaml

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+<Window x:Class="LoadRetimer.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:LoadRetimer"
+        xmlns:ffme="clr-namespace:Unosquare.FFME;assembly=ffme.win"
+        mc:Ignorable="d"
+        Icon="/Icon.ico"
+        Title="Load Retimer" Height="450" Width="1000" PreviewKeyDown="Window_KeyDown" MinHeight="300" MinWidth="900" SizeChanged="Window_SizeChanged">
+    <Grid MouseDown="Video_MouseDown">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="2*" />
+            <RowDefinition Height="3*" />
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="40" />
+        </Grid.RowDefinitions>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="8*" />
+            <ColumnDefinition Width="2*" />
+            <ColumnDefinition Width="3*" />
+        </Grid.ColumnDefinitions>
+        <Menu Grid.Row="0" Grid.ColumnSpan="3">
+            <MenuItem Header="_File">
+                <MenuItem Header="_Open Video" Click="OpenFile_Click" />
+                <MenuItem Header="_Open Loads" Click="OpenLoads_Click" />
+                <MenuItem Header="_Save Loads" Click="SaveLoads_Click" />
+                <MenuItem Header="_Info" Click="Info_Click" />
+            </MenuItem>
+        </Menu>
+        <Label Content="No video loaded." Grid.Row="1" Grid.Column="0" Grid.RowSpan="2" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/>
+        <ffme:MediaElement Grid.Row="1" Grid.Column="0" Grid.RowSpan="2" LoadedBehavior="Pause" x:Name="Video" MediaOpened="Video_MediaOpened"/>
+        <Rectangle x:Name="Rect" Grid.Row="1" Grid.RowSpan="2" HorizontalAlignment="Left" VerticalAlignment="Top" Fill="#20000000" />
+
+        <Rectangle Grid.Row="1" Grid.Column="1">
+            <Rectangle.Fill>
+                <VisualBrush x:Name="Magnifier" Visual="{Binding ., ElementName=Video}" Stretch="Uniform" Viewbox="0, 0, 533, 352" ViewboxUnits="Absolute" Viewport="0, 0, 1, 1" ViewportUnits="RelativeToBoundingBox" />
+            </Rectangle.Fill>
+            <Rectangle.Effect>
+                <local:BrightnessEffect />
+            </Rectangle.Effect>
+        </Rectangle>
+        <StackPanel Name="VideoInfo" Grid.Row="2" Grid.Column="1">
+            <Label Content="Video info" FontWeight="Bold" />
+            <Label x:Name="FPSLabel" Content="FPS:" />
+            <Label x:Name="DurationLabel" Content="Duration:" />
+        </StackPanel>
+
+        <Grid Grid.Row="1" Grid.Column="2">
+            <Grid.RowDefinitions>
+                <RowDefinition Height="1*" />
+                <RowDefinition Height="Auto" />
+            </Grid.RowDefinitions>
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="1*" />
+                <ColumnDefinition Width="1*" />
+            </Grid.ColumnDefinitions>
+            <local:LoadInfo Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" x:Name="TotalRunInfo"/>
+            <Button Grid.Row="1" Grid.Column="0" Content="Start Run" Click="StartRun_Click" />
+            <Button Grid.Row="1" Grid.Column="1" Content="End Run" Click="EndRun_Click" />
+        </Grid>
+
+        <ListBox Grid.Row="2" Grid.Column="2" Grid.RowSpan="2" x:Name="LoadBox" HorizontalContentAlignment="Stretch" />
+        <Grid Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="1*" />
+                <ColumnDefinition Width="1*" />
+                <ColumnDefinition Width="1*" />
+                <ColumnDefinition Width="2*" />
+                <ColumnDefinition Width="2*" />
+            </Grid.ColumnDefinitions>
+            <Button Grid.Column="0" Content="-1 frame" Click="FrameBack_Click" />
+            <Button Grid.Column="1" x:Name="PlayPause" Content="Play" Click="ButtonPlayPause_Click" />
+            <Button Grid.Column="2" Content="+1 frame" Click="FrameForward_Click" />
+            <Button Grid.Column="3" Content="Begin Load" Click="BeginLoad_Click" />
+            <Button Grid.Column="4" Content="End Load" Click="EndLoad_Click" />
+        </Grid>
+        <Slider Grid.Row="3" HorizontalAlignment="Stretch" VerticalAlignment="Center" x:Name="Slider" Thumb.DragStarted="Slider_DragStarted" Thumb.DragCompleted="Slider_DragCompleted" ValueChanged="Slider_ValueChanged" Maximum="1000" LargeChange="0" SmallChange="0"/>
+        <Label x:Name="TimePosition" Grid.Row="3" Grid.Column="1" Content="00:00.000" HorizontalAlignment="Center" VerticalAlignment="Center" FontFamily="Courier New" />
+        <Button Grid.Row="4" Grid.Column="2" Content="Retime!" Click="Retime_Click" />
+    </Grid>
+</Window>