AmiReel/MainWindow.xaml

<Window x:Class="AmigaDB.VideoRenderer.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="AmiReel" Height="850" Width="1120" MinHeight="720" MinWidth="940"
        WindowStartupLocation="CenterScreen">
    <Grid Margin="24">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>

        <Grid Margin="0,0,0,20">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="220"/>
            </Grid.ColumnDefinitions>

            <StackPanel>
                <TextBlock Text="AmiReel" Foreground="{StaticResource AccentBrush}" FontSize="18" FontWeight="Bold"/>
                <TextBlock Text="Video Renderer" FontSize="38" FontWeight="SemiBold"/>
                <TextBlock Text="AVI recordings → 4K50 YouTube video, thumbnails and animated preview"
                           Foreground="{StaticResource MutedBrush}" Margin="0,6,0,0"/>
            </StackPanel>

            <Border Grid.Column="1" Style="{StaticResource SecondaryPanel}" Padding="14,10" HorizontalAlignment="Right">
                <StackPanel>
                    <TextBlock Text="Theme" Foreground="{StaticResource MutedBrush}" Margin="0,0,0,4"/>
                    <ComboBox x:Name="ThemeBox" SelectionChanged="ThemeBox_SelectionChanged">
                        <ComboBoxItem Content="Dark" Tag="Dark"/>
                        <ComboBoxItem Content="Light" Tag="Light"/>
                    </ComboBox>
                </StackPanel>
            </Border>
        </Grid>

        <Grid Grid.Row="1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="1.05*"/>
                <ColumnDefinition Width="18"/>
                <ColumnDefinition Width="0.95*"/>
            </Grid.ColumnDefinitions>

            <ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled">
                <StackPanel>
                    <GroupBox Header="Source recordings">
                        <Grid>
                            <Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition Height="125"/></Grid.RowDefinitions>
                            <StackPanel Orientation="Horizontal" Margin="0,0,0,8">
                                <Button Content="Add AVI files…" Click="AddInputs_Click" Margin="0,0,8,0"/>
                                <Button Content="Clear" Click="ClearInputs_Click"/>
                            </StackPanel>
                            <ListBox x:Name="InputList" Grid.Row="1"/>
                        </Grid>
                    </GroupBox>

                    <GroupBox Header="End card and output">
                        <Grid>
                            <Grid.ColumnDefinitions><ColumnDefinition Width="*"/><ColumnDefinition Width="Auto"/></Grid.ColumnDefinitions>
                            <Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition/><RowDefinition/><RowDefinition/></Grid.RowDefinitions>
                            <TextBlock Text="Leave blank to use a built-in black end card." Foreground="{StaticResource MutedBrush}" Margin="0,0,0,6"/>
                            <TextBox x:Name="EndCardBox" Grid.Row="1" Margin="0,0,8,8" ToolTip="Optional end-card image"/>
                            <Button Grid.Row="1" Grid.Column="1" Content="Browse…" Click="BrowseEndCard_Click" Margin="0,0,0,8"/>
                            <TextBox x:Name="OutputFolderBox" Grid.Row="2" Margin="0,0,8,8" ToolTip="Output folder"/>
                            <Button Grid.Row="2" Grid.Column="1" Content="Browse…" Click="BrowseOutput_Click" Margin="0,0,0,8"/>
                            <TextBox x:Name="OutputNameBox" Grid.Row="3" Grid.ColumnSpan="2" Text="amigadb_intro" ToolTip="Output filename prefix"/>
                        </Grid>
                    </GroupBox>

                    <GroupBox Header="Video encoding">
                        <Grid>
                            <Grid.ColumnDefinitions><ColumnDefinition Width="*"/><ColumnDefinition Width="*"/></Grid.ColumnDefinitions>
                            <Grid.RowDefinitions><RowDefinition/><RowDefinition/></Grid.RowDefinitions>
                            <StackPanel Margin="0,0,8,8">
                                <TextBlock Text="Encoder" Foreground="{StaticResource MutedBrush}" Margin="0,0,0,4"/>
                                <ComboBox x:Name="EncoderBox" SelectedIndex="0">
                                    <ComboBoxItem Content="Auto (NVENC → CPU fallback)" Tag="Auto"/>
                                    <ComboBoxItem Content="NVIDIA NVENC" Tag="NvidiaNvenc"/>
                                    <ComboBoxItem Content="CPU libx264" Tag="CpuX264"/>
                                </ComboBox>
                            </StackPanel>
                            <StackPanel Grid.Column="1" Margin="8,0,0,8">
                                <TextBlock Text="Output" Foreground="{StaticResource MutedBrush}" Margin="0,0,0,4"/>
                                <TextBox Text="3840 × 2160 · 50 FPS" IsReadOnly="True"/>
                            </StackPanel>
                            <TextBlock Grid.Row="1" Grid.ColumnSpan="2" Foreground="{StaticResource MutedBrush}"
                                       Text="NVENC: preset P6 / CQ 16   ·   CPU: slow / CRF 13"/>
                        </Grid>
                    </GroupBox>

                    <GroupBox Header="FFmpeg tools">
                        <Grid>
                            <Grid.ColumnDefinitions><ColumnDefinition Width="*"/><ColumnDefinition Width="Auto"/></Grid.ColumnDefinitions>
                            <Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition/><RowDefinition/></Grid.RowDefinitions>
                            <TextBlock Text="Optional override. Leave blank to use embedded FFmpeg and FFprobe."
                                       Foreground="{StaticResource MutedBrush}" Margin="0,0,0,6"/>
                            <TextBox x:Name="FfmpegPathBox" Grid.Row="1" Margin="0,0,8,8" ToolTip="Path to ffmpeg.exe"/>
                            <Button Grid.Row="1" Grid.Column="1" Content="Browse…" Click="BrowseFfmpeg_Click" Margin="0,0,0,8"/>
                            <TextBox x:Name="FfprobePathBox" Grid.Row="2" Margin="0,0,8,0" ToolTip="Path to ffprobe.exe"/>
                            <Button Grid.Row="2" Grid.Column="1" Content="Browse…" Click="BrowseFfprobe_Click"/>
                        </Grid>
                    </GroupBox>
                </StackPanel>
            </ScrollViewer>

            <ScrollViewer Grid.Column="2" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled">
                <StackPanel>
                    <GroupBox Header="Timing and screenshots">
                        <Grid>
                            <Grid.ColumnDefinitions><ColumnDefinition/><ColumnDefinition/></Grid.ColumnDefinitions>
                            <Grid.RowDefinitions><RowDefinition/><RowDefinition/></Grid.RowDefinitions>
                            <StackPanel Margin="0,0,8,10">
                                <TextBlock Text="Trim start (seconds)" Foreground="{StaticResource MutedBrush}"/>
                                <TextBox x:Name="TrimBox" Text="4.414"/>
                            </StackPanel>
                            <StackPanel Grid.Column="1" Margin="8,0,0,10">
                                <TextBlock Text="Fade (seconds)" Foreground="{StaticResource MutedBrush}"/>
                                <TextBox x:Name="FadeBox" Text="3"/>
                            </StackPanel>
                            <StackPanel Grid.Row="1" Margin="0,0,8,0">
                                <TextBlock Text="End-card hold (seconds)" Foreground="{StaticResource MutedBrush}"/>
                                <TextBox x:Name="HoldBox" Text="4"/>
                            </StackPanel>
                            <StackPanel Grid.Row="1" Grid.Column="1" Margin="8,0,0,0">
                                <TextBlock Text="Thumbnail interval (seconds)" Foreground="{StaticResource MutedBrush}"/>
                                <TextBox x:Name="IntervalBox" Text="10"/>
                            </StackPanel>
                        </Grid>
                    </GroupBox>

                    <GroupBox Header="Render progress">
                        <StackPanel>
                            <DockPanel Margin="0,0,0,8">
                                <TextBlock x:Name="StageText" Text="Ready" FontWeight="SemiBold"/>
                                <TextBlock x:Name="PercentText" Text="0%" Foreground="{StaticResource AccentBrush}" DockPanel.Dock="Right"/>
                            </DockPanel>
                            <ProgressBar x:Name="RenderProgress" Minimum="0" Maximum="100" Foreground="{StaticResource AccentBrush}"/>
                            <TextBlock x:Name="StatusText" Text="Select the recordings and start the render. The end card is optional."
                                       Foreground="{StaticResource MutedBrush}" TextWrapping="Wrap" Margin="0,8,0,0"/>
                        </StackPanel>
                    </GroupBox>

                    <GroupBox Header="FFmpeg log">
                        <TextBox x:Name="LogBox" Height="280" IsReadOnly="True" AcceptsReturn="True"
                                 VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"
                                 FontFamily="Consolas" FontSize="11" TextWrapping="NoWrap"/>
                    </GroupBox>
                </StackPanel>
            </ScrollViewer>
        </Grid>

        <DockPanel Grid.Row="2" Margin="0,18,0,0">
            <Button x:Name="OpenOutputButton" Content="Open output folder" Click="OpenOutput_Click" IsEnabled="False"/>
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
                <Button x:Name="CancelButton" Content="Cancel" Click="Cancel_Click" IsEnabled="False" Margin="0,0,10,0"/>
                <Button x:Name="RenderButton" Content="Start render" Style="{StaticResource PrimaryButton}" Click="Render_Click"/>
            </StackPanel>
        </DockPanel>
    </Grid>
</Window>