Add resolution-aware subtitle scaling and configurable layout defaults

- replace fixed RG subtitle bottom positioning with resolution-scaled Y offset
- add centralized ScaleX, ScaleY, and ScaleFont helpers
- scale RG horizontal eye offset based on output width
- scale font size, SBS margins, and OU margins based on output/base resolution
- change default baseline behavior from legacy 384x288 to tunable base resolution
- add BaseResX/BaseResY options with 1280x720 defaults
- add CLI options for:
  - --baseresx
  - --baseresy
  - --bottomoffset
  - --sbssidemargin
  - --outopmargin
  - --verticalmargin
- replace remaining layout magic numbers with configurable options:
  - BottomOffset
  - SbsSideMargin
  - OuTopMargin
  - VerticalMargin
  - FontSize
  - OffsetX
- preserve original numeric defaults for layout settings when not specified (based off of my personal experiences and preferences.
- update WinForms designer to expose new converter settings
- update WinForms code-behind to pass new options to Converter.Main
- prefill GUI controls with converter-aligned default values
- improve mode-based UI enable/disable behavior for SBS, OU, and RG settings
- prepare shared-defaults approach via ConverterDefaults for keeping GUI and converter defaults in sync

ConvertSRTto3DASS/Converter.cs

@@ -16,20 +16,67 @@ namespace ConvertSRTto3DASS
         {
             SBS,
             OU,
-            RG  //Experimental
+            RG // Experimental
+        }
+
+        public static class ConverterDefaults
+        {
+            /// <summary>
+            ///720 as default is arbitary,it's my favorite resolution for space saving and most mobile 3d viewing doesn't benefit from much higher (IE google cardboard or Meta Quest Headset).
+            /// </summary>
+            public const int ResX = 1280;
+            public const int ResY = 720;
+
+            public const int BaseResX = 1280;
+            public const int BaseResY = 720;
+
+            public const int FontSize = 16;
+            public const int OffsetX = 4;
+            public const int BottomOffset = 18;
+            public const int SbsSideMargin = 640;
+            public const int OuTopMargin = 385;
+            public const int VerticalMargin = 25;
+
+            public const string DefaultMode = "sbs";
         }
 
         private class Options
         {
             public string InputPath { get; set; }
             public string OutputPath { get; set; }
+
             public StereoMode Mode { get; set; } = StereoMode.SBS;
-            public int ResX { get; set; } = 384;
+
-            public int ResY { get; set; } = 288;
+            public int ResX { get; set; } = ConverterDefaults.ResX;
-            public int FontSize { get; set; } = 16;
+            public int ResY { get; set; } = ConverterDefaults.ResY;
-            public int OffsetX { get; set; } = 4; // used for RG anaglyph
+            public int BaseResX { get; set; } = ConverterDefaults.BaseResX;
+            public int BaseResY { get; set; } = ConverterDefaults.BaseResY;
+            public int FontSize { get; set; } = ConverterDefaults.FontSize;
+            public int OffsetX { get; set; } = ConverterDefaults.OffsetX;
+            public int BottomOffset { get; set; } = ConverterDefaults.BottomOffset;
+            public int SbsSideMargin { get; set; } = ConverterDefaults.SbsSideMargin;
+            public int OuTopMargin { get; set; } = ConverterDefaults.OuTopMargin;
+            public int VerticalMargin { get; set; } = ConverterDefaults.VerticalMargin;
         }
 
+        private static readonly Dictionary<Regex, string> RegexReplacementDict =
+            new Dictionary<Regex, string>
+            {
+                { new Regex("<b>", RegexOptions.IgnoreCase), "{\\b1}" },
+                { new Regex("</b>", RegexOptions.IgnoreCase), "{\\b0}" },
+                { new Regex("<i>", RegexOptions.IgnoreCase), "{\\i1}" },
+                { new Regex("</i>", RegexOptions.IgnoreCase), "{\\i0}" },
+                { new Regex("<u>", RegexOptions.IgnoreCase), "{\\u1}" },
+                { new Regex("</u>", RegexOptions.IgnoreCase), "{\\u0}" },
+                { new Regex("</font>", RegexOptions.IgnoreCase), "{\\c&HFFFFFF&}" }
+            };
+
+        private static readonly Regex ColorRegex =
+            new Regex("<font color=\"#([0-9A-Fa-f]{6})\">", RegexOptions.IgnoreCase);
+
+        private static readonly Regex RemoveFormattingRegex =
+            new Regex("<.+?>|(\\r)", RegexOptions.IgnoreCase);
+
         public static void Main(string[] args)
         {
             try
@@ -48,7 +95,7 @@ namespace ConvertSRTto3DASS
                 if (string.IsNullOrWhiteSpace(options.OutputPath))
                 {
                     options.OutputPath = Path.Combine(
-                        Path.GetDirectoryName(options.InputPath) ?? "",
+                        Path.GetDirectoryName(options.InputPath) ?? string.Empty,
                         Path.GetFileNameWithoutExtension(options.InputPath) + ".ass");
                 }
 
@@ -56,13 +103,18 @@ namespace ConvertSRTto3DASS
                 Console.WriteLine("Output:          " + options.OutputPath);
                 Console.WriteLine("Mode:            " + options.Mode);
                 Console.WriteLine("Resolution:      " + options.ResX + "x" + options.ResY);
+                Console.WriteLine("Base Res:        " + options.BaseResX + "x" + options.BaseResY);
                 Console.WriteLine("Font size:       " + options.FontSize);
                 Console.WriteLine("OffsetX:         " + options.OffsetX);
+                Console.WriteLine("BottomOffset:    " + options.BottomOffset);
+                Console.WriteLine("SbsSideMargin:   " + options.SbsSideMargin);
+                Console.WriteLine("OuTopMargin:     " + options.OuTopMargin);
+                Console.WriteLine("VerticalMargin:  " + options.VerticalMargin);
 
                 var extracted = ExtractSubFromSRT(options.InputPath);
                 Console.WriteLine("Subtitle blocks parsed: " + extracted.Count);
 
-                var style = CreateStandardStyle(options.Mode, options.FontSize);
+                var style = CreateStandardStyle(options);
                 var header = CreateHeader(options.InputPath, options.ResY, options.ResX);
                 var eventsText = ProcessSubs(extracted, options);
 
@@ -74,7 +126,10 @@ namespace ConvertSRTto3DASS
                     "\n\n[Events]\n" +
                     eventsText;
 
-                File.WriteAllText(options.OutputPath, finished, new UTF8Encoding(encoderShouldEmitUTF8Identifier: true));
+                File.WriteAllText(
+                    options.OutputPath,
+                    finished,
+                    new UTF8Encoding(encoderShouldEmitUTF8Identifier: true));
 
                 Console.WriteLine("Conversion complete.");
             }
@@ -130,24 +185,60 @@ namespace ConvertSRTto3DASS
                         i += 2;
                         break;
 
+                    case "--baseresx":
+                        EnsureValueExists(args, i, "--baseresx");
+                        options.BaseResX = ParsePositiveInt(args[i + 1], "--baseresx");
+                        i += 2;
+                        break;
+
+                    case "--baseresy":
+                        EnsureValueExists(args, i, "--baseresy");
+                        options.BaseResY = ParsePositiveInt(args[i + 1], "--baseresy");
+                        i += 2;
+                        break;
+
                     case "--fontsize":
                         EnsureValueExists(args, i, "--fontsize");
                         options.FontSize = ParsePositiveInt(args[i + 1], "--fontsize");
                         i += 2;
                         break;
 
-                    case "--output":
-                        EnsureValueExists(args, i, "--output");
-                        options.OutputPath = args[i + 1];
-                        i += 2;
-                        break;
-
                     case "--offsetx":
                         EnsureValueExists(args, i, "--offsetx");
                         options.OffsetX = ParseNonNegativeInt(args[i + 1], "--offsetx");
                         i += 2;
                         break;
 
+                    case "--bottomoffset":
+                        EnsureValueExists(args, i, "--bottomoffset");
+                        options.BottomOffset = ParseNonNegativeInt(args[i + 1], "--bottomoffset");
+                        i += 2;
+                        break;
+
+                    case "--sbssidemargin":
+                        EnsureValueExists(args, i, "--sbssidemargin");
+                        options.SbsSideMargin = ParseNonNegativeInt(args[i + 1], "--sbssidemargin");
+                        i += 2;
+                        break;
+
+                    case "--outopmargin":
+                        EnsureValueExists(args, i, "--outopmargin");
+                        options.OuTopMargin = ParseNonNegativeInt(args[i + 1], "--outopmargin");
+                        i += 2;
+                        break;
+
+                    case "--verticalmargin":
+                        EnsureValueExists(args, i, "--verticalmargin");
+                        options.VerticalMargin = ParseNonNegativeInt(args[i + 1], "--verticalmargin");
+                        i += 2;
+                        break;
+
+                    case "--output":
+                        EnsureValueExists(args, i, "--output");
+                        options.OutputPath = args[i + 1];
+                        i += 2;
+                        break;
+
                     case "--help":
                     case "-h":
                     case "/?":
@@ -193,15 +284,23 @@ namespace ConvertSRTto3DASS
             Console.WriteLine("  --mode sbs|ou|rg");
             Console.WriteLine("  --resx <number>");
             Console.WriteLine("  --resy <number>");
+            Console.WriteLine("  --baseresx <number>      (scaling reference width, default 1280)");
+            Console.WriteLine("  --baseresy <number>      (scaling reference height, default 720)");
             Console.WriteLine("  --fontsize <number>");
-            Console.WriteLine("  --offsetx <number>   (used for rg mode)");
+            Console.WriteLine("  --offsetx <number>       (RG eye separation)");
+            Console.WriteLine("  --bottomoffset <number>  (RG bottom offset)");
+            Console.WriteLine("  --sbssidemargin <number> (SBS side margin)");
+            Console.WriteLine("  --outopmargin <number>   (OU top subtitle margin)");
+            Console.WriteLine("  --verticalmargin <number> (general vertical/bottom margin)");
             Console.WriteLine("  --output <path>");
             Console.WriteLine();
             Console.WriteLine("Examples:");
             Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --mode sbs");
-            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --mode ou --resx 384 --resy 288");
+            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --mode ou --resx 1280 --resy 720");
-            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --mode rg --offsetx 4");
+            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --mode rg --offsetx 6 --bottomoffset 24");
-            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --mode rg --fontsize 20 --output ""movie_rg.ass""");
+            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --resx 1920 --resy 1080 --baseresx 1280 --baseresy 720");
+            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --sbssidemargin 220 --verticalmargin 16");
+            Console.WriteLine(@"  ConvertSRTto3DASS.exe ""movie.srt"" --outopmargin 180 --fontsize 20 --output ""movie_custom.ass""");
         }
 
         private static StereoMode ParseStereoMode(string mode)
@@ -237,29 +336,31 @@ namespace ConvertSRTto3DASS
             }
         }
 
-        private static Dictionary<Regex, string> regexReplacementDict =
+        private static int ScaleX(int value, Options options)
-            new Dictionary<Regex, string> {
+        {
-                { new Regex("<b>", RegexOptions.IgnoreCase), "{\\b1}" },
+            return (int)Math.Round(value * (options.ResX / (double)options.BaseResX));
-                { new Regex("</b>", RegexOptions.IgnoreCase), "{\\b0}" },
+        }
-                { new Regex("<i>", RegexOptions.IgnoreCase), "{\\i1}" },
-                { new Regex("</i>", RegexOptions.IgnoreCase), "{\\i0}" },
-                { new Regex("<u>", RegexOptions.IgnoreCase), "{\\u1}" },
-                { new Regex("</u>", RegexOptions.IgnoreCase), "{\\u0}" },
-                { new Regex("</font>", RegexOptions.IgnoreCase), "{\\c&HFFFFFF&}" }
-            };
 
-        private static Regex color = new Regex("<font color=\"#([0-9A-Fa-f]{6})\">", RegexOptions.IgnoreCase);
+        private static int ScaleY(int value, Options options)
+        {
+            return (int)Math.Round(value * (options.ResY / (double)options.BaseResY));
+        }
+
+        private static int ScaleFont(int fontSize, Options options)
+        {
+            return Math.Max(1, ScaleY(fontSize, options));
+        }
 
         private static string ChangeFormatting(string line)
         {
-            foreach (var tuple in regexReplacementDict)
+            foreach (var tuple in RegexReplacementDict)
             {
                 line = tuple.Key.Replace(line, tuple.Value);
             }
 
-            while (color.IsMatch(line))
+            while (ColorRegex.IsMatch(line))
             {
-                var match = color.Match(line);
+                var match = ColorRegex.Match(line);
                 string rgb = match.Groups[1].Value; // RRGGBB
 
                 string rr = rgb.Substring(0, 2);
@@ -269,18 +370,15 @@ namespace ConvertSRTto3DASS
                 // ASS expects BBGGRR
                 string assColor = bb + gg + rr;
 
-                line = color.Replace(line, "{\\c&H" + assColor + "&}", 1);
+                line = ColorRegex.Replace(line, "{\\c&H" + assColor + "&}", 1);
             }
 
             return RemoveFormatting(line);
         }
 
-        private static Regex reg = new Regex("<.+?>|(\\r)", RegexOptions.IgnoreCase);
-
         private static string RemoveFormatting(string line)
         {
-            var replacement = reg.Replace(line, "");
+            return RemoveFormattingRegex.Replace(line, "");
-            return replacement;
         }
 
         private static string ProcessSubs(List<Tuple<string, string, string, string>> srt, Options options)
@@ -308,9 +406,12 @@ namespace ConvertSRTto3DASS
                 else if (options.Mode == StereoMode.RG)
                 {
                     int centerX = options.ResX / 2;
-                    int y = options.ResY - 18; // near bottom
+                    int scaledBottomOffset = ScaleY(options.BottomOffset, options);
-                    int redX = centerX - options.OffsetX;
+                    int y = options.ResY - scaledBottomOffset;
-                    int greenX = centerX + options.OffsetX;
+
+                    int scaledOffsetX = ScaleX(options.OffsetX, options);
+                    int redX = centerX - scaledOffsetX;
+                    int greenX = centerX + scaledOffsetX;
 
                     string redText = "{\\an2\\pos(" + redX + "," + y + ")}" + text;
                     string greenText = "{\\an2\\pos(" + greenX + "," + y + ")}" + text;
@@ -331,23 +432,31 @@ namespace ConvertSRTto3DASS
             return tmp.Replace(",", ".");
         }
 
-        private static string CreateStandardStyle(StereoMode stereoMode, int fontSize)
+        private static string CreateStandardStyle(Options options)
         {
-            switch (stereoMode)
+            int scaledFontSize = ScaleFont(options.FontSize, options);
+
+            switch (options.Mode)
             {
                 case StereoMode.SBS:
-                    return CreateSbsStyle(fontSize);
+                    return CreateSbsStyle(scaledFontSize, options);
+
                 case StereoMode.OU:
-                    return CreateOuStyle(fontSize);
+                    return CreateOuStyle(scaledFontSize, options);
+
                 case StereoMode.RG:
-                    return CreateRgStyle(fontSize);
+                    return CreateRgStyle(scaledFontSize, options);
+
                 default:
-                    throw new ArgumentOutOfRangeException(nameof(stereoMode));
+                    throw new ArgumentOutOfRangeException(nameof(options.Mode));
             }
         }
 
-        private static string CreateSbsStyle(int fontSize)
+        private static string CreateSbsStyle(int fontSize, Options options)
         {
+            int sideMargin = ScaleX(options.SbsSideMargin, options);
+            int verticalMargin = ScaleY(options.VerticalMargin, options);
+
             string style =
                 "Format: " +
                 "Name, " +
@@ -394,9 +503,9 @@ namespace ConvertSRTto3DASS
                 "1," +
                 "0," +
                 "2," +
-                "192," +
+                sideMargin + "," +
                 "0," +
-                "10," +
+                verticalMargin + "," +
                 "0\n" +
 
                 "Style: " +
@@ -420,15 +529,18 @@ namespace ConvertSRTto3DASS
                 "0," +
                 "2," +
                 "0," +
-                "192," +
+                sideMargin + "," +
-                "10," +
+                verticalMargin + "," +
                 "0";
 
             return style;
         }
 
-        private static string CreateOuStyle(int fontSize)
+        private static string CreateOuStyle(int fontSize, Options options)
         {
+            int bottomMargin = ScaleY(options.VerticalMargin, options);
+            int topMargin = ScaleY(options.OuTopMargin, options);
+
             string style =
                 "Format: " +
                 "Name, " +
@@ -477,7 +589,7 @@ namespace ConvertSRTto3DASS
                 "2," +
                 "0," +
                 "0," +
-                "154," +
+                topMargin + "," +
                 "0\n" +
 
                 "Style: " +
@@ -502,14 +614,16 @@ namespace ConvertSRTto3DASS
                 "2," +
                 "0," +
                 "0," +
-                "10," +
+                bottomMargin + "," +
                 "0";
 
             return style;
         }
 
-        private static string CreateRgStyle(int fontSize)
+        private static string CreateRgStyle(int fontSize, Options options)
         {
+            int verticalMargin = ScaleY(options.VerticalMargin, options);
+
             string style =
                 "Format: " +
                 "Name, " +
@@ -560,7 +674,7 @@ namespace ConvertSRTto3DASS
                 "2," +
                 "0," +
                 "0," +
-                "10," +
+                verticalMargin + "," +
                 "0\n" +
 
                 // Green = &H00FF00
@@ -586,16 +700,17 @@ namespace ConvertSRTto3DASS
                 "2," +
                 "0," +
                 "0," +
-                "10," +
+                verticalMargin + "," +
                 "0";
 
             return style;
         }
 
-        private static string CreateHeader(string file, int resY = 288, int resX = 384)
+        private static string CreateHeader(string file, int resY = 720, int resX = 1280)
         {
             var name = Path.GetFileNameWithoutExtension(file);
-            string scriptinfo =
+
+            string scriptInfo =
                 "; Generated by ConvertSRTto3D\n" +
                 "Title: " + name + "\n" +
                 "ScriptType: v4.00+\n" +
@@ -604,7 +719,7 @@ namespace ConvertSRTto3DASS
                 "PlayResY: " + resY + "\n" +
                 "ScaledBorderAndShadow: yes";
 
-            return scriptinfo;
+            return scriptInfo;
         }
 
         private static string ReadTextSmart(string path)
@@ -654,6 +769,7 @@ namespace ConvertSRTto3DASS
                         $"Warning: expected subtitle number {expectedDialogNumber}, but found {dialogNumber}.");
                     expectedDialogNumber = dialogNumber;
                 }
+
                 expectedDialogNumber++;
 
                 var timeMatch = Regex.Match(
@@ -668,7 +784,6 @@ namespace ConvertSRTto3DASS
 
                 string timestampStart = timeMatch.Groups["start"].Value;
                 string timestampEnd = timeMatch.Groups["end"].Value;
-
                 string subtitleText = string.Join("\\N", lines.Skip(2));
 
                 results.Add(new Tuple<string, string, string, string>(

ConvertSRTto3DASSGUI/Form1.Designer.cs

@@ -24,12 +24,30 @@
         private System.Windows.Forms.Label lblResY;
         private System.Windows.Forms.NumericUpDown nudResY;
 
+        private System.Windows.Forms.Label lblBaseResX;
+        private System.Windows.Forms.NumericUpDown nudBaseResX;
+
+        private System.Windows.Forms.Label lblBaseResY;
+        private System.Windows.Forms.NumericUpDown nudBaseResY;
+
         private System.Windows.Forms.Label lblFontSize;
         private System.Windows.Forms.NumericUpDown nudFontSize;
 
         private System.Windows.Forms.Label lblOffsetX;
         private System.Windows.Forms.NumericUpDown nudOffsetX;
 
+        private System.Windows.Forms.Label lblBottomOffset;
+        private System.Windows.Forms.NumericUpDown nudBottomOffset;
+
+        private System.Windows.Forms.Label lblSbsSideMargin;
+        private System.Windows.Forms.NumericUpDown nudSbsSideMargin;
+
+        private System.Windows.Forms.Label lblOuTopMargin;
+        private System.Windows.Forms.NumericUpDown nudOuTopMargin;
+
+        private System.Windows.Forms.Label lblVerticalMargin;
+        private System.Windows.Forms.NumericUpDown nudVerticalMargin;
+
         private System.Windows.Forms.Button btnConvert;
         private System.Windows.Forms.TextBox txtStatus;
 
@@ -66,16 +84,34 @@
             this.nudResX = new System.Windows.Forms.NumericUpDown();
             this.lblResY = new System.Windows.Forms.Label();
             this.nudResY = new System.Windows.Forms.NumericUpDown();
+            this.lblBaseResX = new System.Windows.Forms.Label();
+            this.nudBaseResX = new System.Windows.Forms.NumericUpDown();
+            this.lblBaseResY = new System.Windows.Forms.Label();
+            this.nudBaseResY = new System.Windows.Forms.NumericUpDown();
             this.lblFontSize = new System.Windows.Forms.Label();
             this.nudFontSize = new System.Windows.Forms.NumericUpDown();
             this.lblOffsetX = new System.Windows.Forms.Label();
             this.nudOffsetX = new System.Windows.Forms.NumericUpDown();
+            this.lblBottomOffset = new System.Windows.Forms.Label();
+            this.nudBottomOffset = new System.Windows.Forms.NumericUpDown();
+            this.lblSbsSideMargin = new System.Windows.Forms.Label();
+            this.nudSbsSideMargin = new System.Windows.Forms.NumericUpDown();
+            this.lblOuTopMargin = new System.Windows.Forms.Label();
+            this.nudOuTopMargin = new System.Windows.Forms.NumericUpDown();
+            this.lblVerticalMargin = new System.Windows.Forms.Label();
+            this.nudVerticalMargin = new System.Windows.Forms.NumericUpDown();
             this.btnConvert = new System.Windows.Forms.Button();
             this.txtStatus = new System.Windows.Forms.TextBox();
             ((System.ComponentModel.ISupportInitialize)(this.nudResX)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.nudResY)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudBaseResX)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudBaseResY)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.nudFontSize)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.nudOffsetX)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudBottomOffset)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudSbsSideMargin)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudOuTopMargin)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudVerticalMargin)).BeginInit();
             this.SuspendLayout();
             // 
             // lblInputFile
@@ -179,7 +215,7 @@
             this.nudResX.Size = new System.Drawing.Size(120, 22);
             this.nudResX.TabIndex = 9;
             this.nudResX.Value = new decimal(new int[] {
-            384,
+            1280,
             0,
             0,
             0});
@@ -210,7 +246,69 @@
             this.nudResY.Size = new System.Drawing.Size(120, 22);
             this.nudResY.TabIndex = 11;
             this.nudResY.Value = new decimal(new int[] {
-            288,
+            720,
+            0,
+            0,
+            0});
+            // 
+            // lblBaseResX
+            // 
+            this.lblBaseResX.AutoSize = true;
+            this.lblBaseResX.Location = new System.Drawing.Point(520, 178);
+            this.lblBaseResX.Name = "lblBaseResX";
+            this.lblBaseResX.Size = new System.Drawing.Size(81, 16);
+            this.lblBaseResX.TabIndex = 12;
+            this.lblBaseResX.Text = "Base Res X:";
+            // 
+            // nudBaseResX
+            // 
+            this.nudBaseResX.Location = new System.Drawing.Point(620, 176);
+            this.nudBaseResX.Maximum = new decimal(new int[] {
+            10000,
+            0,
+            0,
+            0});
+            this.nudBaseResX.Minimum = new decimal(new int[] {
+            1,
+            0,
+            0,
+            0});
+            this.nudBaseResX.Name = "nudBaseResX";
+            this.nudBaseResX.Size = new System.Drawing.Size(120, 22);
+            this.nudBaseResX.TabIndex = 13;
+            this.nudBaseResX.Value = new decimal(new int[] {
+            1280,
+            0,
+            0,
+            0});
+            // 
+            // lblBaseResY
+            // 
+            this.lblBaseResY.AutoSize = true;
+            this.lblBaseResY.Location = new System.Drawing.Point(760, 178);
+            this.lblBaseResY.Name = "lblBaseResY";
+            this.lblBaseResY.Size = new System.Drawing.Size(82, 16);
+            this.lblBaseResY.TabIndex = 14;
+            this.lblBaseResY.Text = "Base Res Y:";
+            // 
+            // nudBaseResY
+            // 
+            this.nudBaseResY.Location = new System.Drawing.Point(860, 176);
+            this.nudBaseResY.Maximum = new decimal(new int[] {
+            10000,
+            0,
+            0,
+            0});
+            this.nudBaseResY.Minimum = new decimal(new int[] {
+            1,
+            0,
+            0,
+            0});
+            this.nudBaseResY.Name = "nudBaseResY";
+            this.nudBaseResY.Size = new System.Drawing.Size(120, 22);
+            this.nudBaseResY.TabIndex = 15;
+            this.nudBaseResY.Value = new decimal(new int[] {
+            720,
             0,
             0,
             0});
@@ -221,7 +319,7 @@
             this.lblFontSize.Location = new System.Drawing.Point(24, 228);
             this.lblFontSize.Name = "lblFontSize";
             this.lblFontSize.Size = new System.Drawing.Size(65, 16);
-            this.lblFontSize.TabIndex = 12;
+            this.lblFontSize.TabIndex = 16;
             this.lblFontSize.Text = "Font Size:";
             // 
             // nudFontSize
@@ -239,7 +337,7 @@
             0});
             this.nudFontSize.Name = "nudFontSize";
             this.nudFontSize.Size = new System.Drawing.Size(120, 22);
-            this.nudFontSize.TabIndex = 13;
+            this.nudFontSize.TabIndex = 17;
             this.nudFontSize.Value = new decimal(new int[] {
             16,
             0,
@@ -252,7 +350,7 @@
             this.lblOffsetX.Location = new System.Drawing.Point(300, 228);
             this.lblOffsetX.Name = "lblOffsetX";
             this.lblOffsetX.Size = new System.Drawing.Size(55, 16);
-            this.lblOffsetX.TabIndex = 14;
+            this.lblOffsetX.TabIndex = 18;
             this.lblOffsetX.Text = "Offset X:";
             // 
             // nudOffsetX
@@ -265,43 +363,159 @@
             0});
             this.nudOffsetX.Name = "nudOffsetX";
             this.nudOffsetX.Size = new System.Drawing.Size(120, 22);
-            this.nudOffsetX.TabIndex = 15;
+            this.nudOffsetX.TabIndex = 19;
             this.nudOffsetX.Value = new decimal(new int[] {
             4,
             0,
             0,
             0});
             // 
+            // lblBottomOffset
+            // 
+            this.lblBottomOffset.AutoSize = true;
+            this.lblBottomOffset.Location = new System.Drawing.Point(520, 228);
+            this.lblBottomOffset.Name = "lblBottomOffset";
+            this.lblBottomOffset.Size = new System.Drawing.Size(89, 16);
+            this.lblBottomOffset.TabIndex = 20;
+            this.lblBottomOffset.Text = "Bottom Offset:";
+            // 
+            // nudBottomOffset
+            // 
+            this.nudBottomOffset.Location = new System.Drawing.Point(620, 226);
+            this.nudBottomOffset.Maximum = new decimal(new int[] {
+            1000,
+            0,
+            0,
+            0});
+            this.nudBottomOffset.Name = "nudBottomOffset";
+            this.nudBottomOffset.Size = new System.Drawing.Size(120, 22);
+            this.nudBottomOffset.TabIndex = 21;
+            this.nudBottomOffset.Value = new decimal(new int[] {
+            18,
+            0,
+            0,
+            0});
+            // 
+            // lblSbsSideMargin
+            // 
+            this.lblSbsSideMargin.AutoSize = true;
+            this.lblSbsSideMargin.Location = new System.Drawing.Point(24, 278);
+            this.lblSbsSideMargin.Name = "lblSbsSideMargin";
+            this.lblSbsSideMargin.Size = new System.Drawing.Size(112, 16);
+            this.lblSbsSideMargin.TabIndex = 22;
+            this.lblSbsSideMargin.Text = "SBS Side Margin:";
+            // 
+            // nudSbsSideMargin
+            // 
+            this.nudSbsSideMargin.Location = new System.Drawing.Point(140, 276);
+            this.nudSbsSideMargin.Maximum = new decimal(new int[] {
+            5000,
+            0,
+            0,
+            0});
+            this.nudSbsSideMargin.Name = "nudSbsSideMargin";
+            this.nudSbsSideMargin.Size = new System.Drawing.Size(120, 22);
+            this.nudSbsSideMargin.TabIndex = 23;
+            this.nudSbsSideMargin.Value = new decimal(new int[] {
+            192,
+            0,
+            0,
+            0});
+            // 
+            // lblOuTopMargin
+            // 
+            this.lblOuTopMargin.AutoSize = true;
+            this.lblOuTopMargin.Location = new System.Drawing.Point(300, 278);
+            this.lblOuTopMargin.Name = "lblOuTopMargin";
+            this.lblOuTopMargin.Size = new System.Drawing.Size(102, 16);
+            this.lblOuTopMargin.TabIndex = 24;
+            this.lblOuTopMargin.Text = "OU Top Margin:";
+            // 
+            // nudOuTopMargin
+            // 
+            this.nudOuTopMargin.Location = new System.Drawing.Point(410, 276);
+            this.nudOuTopMargin.Maximum = new decimal(new int[] {
+            5000,
+            0,
+            0,
+            0});
+            this.nudOuTopMargin.Name = "nudOuTopMargin";
+            this.nudOuTopMargin.Size = new System.Drawing.Size(120, 22);
+            this.nudOuTopMargin.TabIndex = 25;
+            this.nudOuTopMargin.Value = new decimal(new int[] {
+            154,
+            0,
+            0,
+            0});
+            // 
+            // lblVerticalMargin
+            // 
+            this.lblVerticalMargin.AutoSize = true;
+            this.lblVerticalMargin.Location = new System.Drawing.Point(560, 278);
+            this.lblVerticalMargin.Name = "lblVerticalMargin";
+            this.lblVerticalMargin.Size = new System.Drawing.Size(99, 16);
+            this.lblVerticalMargin.TabIndex = 26;
+            this.lblVerticalMargin.Text = "Vertical Margin:";
+            // 
+            // nudVerticalMargin
+            // 
+            this.nudVerticalMargin.Location = new System.Drawing.Point(670, 276);
+            this.nudVerticalMargin.Maximum = new decimal(new int[] {
+            5000,
+            0,
+            0,
+            0});
+            this.nudVerticalMargin.Name = "nudVerticalMargin";
+            this.nudVerticalMargin.Size = new System.Drawing.Size(120, 22);
+            this.nudVerticalMargin.TabIndex = 27;
+            this.nudVerticalMargin.Value = new decimal(new int[] {
+            10,
+            0,
+            0,
+            0});
+            // 
             // btnConvert
             // 
-            this.btnConvert.Location = new System.Drawing.Point(27, 283);
+            this.btnConvert.Location = new System.Drawing.Point(27, 329);
             this.btnConvert.Name = "btnConvert";
             this.btnConvert.Size = new System.Drawing.Size(145, 40);
-            this.btnConvert.TabIndex = 16;
+            this.btnConvert.TabIndex = 28;
             this.btnConvert.Text = "Convert";
             this.btnConvert.UseVisualStyleBackColor = true;
             this.btnConvert.Click += new System.EventHandler(this.btnConvert_Click);
             // 
             // txtStatus
             // 
-            this.txtStatus.Location = new System.Drawing.Point(27, 349);
+            this.txtStatus.Location = new System.Drawing.Point(27, 392);
             this.txtStatus.Multiline = true;
             this.txtStatus.Name = "txtStatus";
             this.txtStatus.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
             this.txtStatus.Size = new System.Drawing.Size(1033, 225);
-            this.txtStatus.TabIndex = 17;
+            this.txtStatus.TabIndex = 29;
             // 
             // Form1
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(1088, 609);
+            this.ClientSize = new System.Drawing.Size(1088, 640);
             this.Controls.Add(this.txtStatus);
             this.Controls.Add(this.btnConvert);
+            this.Controls.Add(this.nudVerticalMargin);
+            this.Controls.Add(this.lblVerticalMargin);
+            this.Controls.Add(this.nudOuTopMargin);
+            this.Controls.Add(this.lblOuTopMargin);
+            this.Controls.Add(this.nudSbsSideMargin);
+            this.Controls.Add(this.lblSbsSideMargin);
+            this.Controls.Add(this.nudBottomOffset);
+            this.Controls.Add(this.lblBottomOffset);
             this.Controls.Add(this.nudOffsetX);
             this.Controls.Add(this.lblOffsetX);
             this.Controls.Add(this.nudFontSize);
             this.Controls.Add(this.lblFontSize);
+            this.Controls.Add(this.nudBaseResY);
+            this.Controls.Add(this.lblBaseResY);
+            this.Controls.Add(this.nudBaseResX);
+            this.Controls.Add(this.lblBaseResX);
             this.Controls.Add(this.nudResY);
             this.Controls.Add(this.lblResY);
             this.Controls.Add(this.nudResX);
@@ -316,10 +530,17 @@
             this.Controls.Add(this.lblInputFile);
             this.Name = "Form1";
             this.Text = "Convert SRT to 3D ASS";
+            this.Load += new System.EventHandler(this.Form1_Load);
             ((System.ComponentModel.ISupportInitialize)(this.nudResX)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.nudResY)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudBaseResX)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudBaseResY)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.nudFontSize)).EndInit();
             ((System.ComponentModel.ISupportInitialize)(this.nudOffsetX)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudBottomOffset)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudSbsSideMargin)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudOuTopMargin)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.nudVerticalMargin)).EndInit();
             this.ResumeLayout(false);
             this.PerformLayout();
 

ConvertSRTto3DASSGUI/Form1.cs

@@ -1,15 +1,29 @@
-using System;
+using ConvertSRTto3DASS;
+using System;
 using System.IO;
 using System.Windows.Forms;
-using ConvertSRTto3DASS;
+using static ConvertSRTto3DASS.Converter;
 
 namespace ConvertSRTto3DASSGUI
 {
     public partial class Form1 : Form
     {
+        // Keep these in sync with Converter.cs defaults
+        private const int DefaultResX = Converter.ConverterDefaults.ResX;//1280
+        private const int DefaultResY = 720;
+        private const int DefaultBaseResX = 1280;
+        private const int DefaultBaseResY = 720;
+        private const int DefaultFontSize = 16;
+        private const int DefaultOffsetX = 4;
+        private const int DefaultBottomOffset = 18;
+        private const int DefaultSbsSideMargin = 192;
+        private const int DefaultOuTopMargin = 154;
+        private const int DefaultVerticalMargin = 10;
+
         public Form1()
         {
             InitializeComponent();
+            InitializeDefaults();
 
             if (cmbMode.Items.Count > 0)
                 cmbMode.SelectedIndex = 0;
@@ -17,6 +31,39 @@ namespace ConvertSRTto3DASSGUI
             UpdateModeUI();
         }
 
+        private void InitializeDefaults()
+        {
+            txtInputFile.Text = string.Empty;
+            txtOutputFile.Text = string.Empty;
+
+            nudResX.Value = ConverterDefaults.ResX;
+            nudResY.Value = ConverterDefaults.ResY;
+            nudBaseResX.Value = ConverterDefaults.BaseResX;
+            nudBaseResY.Value = ConverterDefaults.BaseResY;
+            nudFontSize.Value = ConverterDefaults.FontSize;
+            nudOffsetX.Value = ConverterDefaults.OffsetX;
+            nudBottomOffset.Value = ConverterDefaults.BottomOffset;
+            nudSbsSideMargin.Value = ConverterDefaults.SbsSideMargin;
+            nudOuTopMargin.Value = ConverterDefaults.OuTopMargin;
+            nudVerticalMargin.Value = ConverterDefaults.VerticalMargin;
+
+            switch (ConverterDefaults.DefaultMode.ToLowerInvariant())
+            {
+                case "sbs":
+                    cmbMode.SelectedIndex = 0;
+                    break;
+                case "ou":
+                    cmbMode.SelectedIndex = 1;
+                    break;
+                case "rg":
+                    cmbMode.SelectedIndex = 2;
+                    break;
+                default:
+                    cmbMode.SelectedIndex = 0;
+                    break;
+            }
+        }
+
         private void btnBrowseInput_Click(object sender, EventArgs e)
         {
             using (var ofd = new OpenFileDialog())
@@ -84,7 +131,7 @@ namespace ConvertSRTto3DASSGUI
 
                 string inputPath = txtInputFile.Text.Trim();
                 string outputPath = txtOutputFile.Text.Trim();
-                string mode = cmbMode.SelectedItem?.ToString() ?? "sbs";
+                string mode = GetSelectedModeValue();
 
                 if (string.IsNullOrWhiteSpace(inputPath))
                 {
@@ -106,26 +153,43 @@ namespace ConvertSRTto3DASSGUI
 
                 int resX = (int)nudResX.Value;
                 int resY = (int)nudResY.Value;
+                int baseResX = (int)nudBaseResX.Value;
+                int baseResY = (int)nudBaseResY.Value;
                 int fontSize = (int)nudFontSize.Value;
                 int offsetX = (int)nudOffsetX.Value;
+                int bottomOffset = (int)nudBottomOffset.Value;
+                int sbsSideMargin = (int)nudSbsSideMargin.Value;
+                int ouTopMargin = (int)nudOuTopMargin.Value;
+                int verticalMargin = (int)nudVerticalMargin.Value;
 
                 AppendStatus("Starting conversion...");
                 AppendStatus("Input: " + inputPath);
                 AppendStatus("Output: " + outputPath);
                 AppendStatus("Mode: " + mode);
                 AppendStatus("Resolution: " + resX + "x" + resY);
+                AppendStatus("Base Resolution: " + baseResX + "x" + baseResY);
                 AppendStatus("Font Size: " + fontSize);
                 AppendStatus("OffsetX: " + offsetX);
+                AppendStatus("BottomOffset: " + bottomOffset);
+                AppendStatus("SbsSideMargin: " + sbsSideMargin);
+                AppendStatus("OuTopMargin: " + ouTopMargin);
+                AppendStatus("VerticalMargin: " + verticalMargin);
 
-                ConvertSRTto3DASS.Converter.Main(new[]
+                Converter.Main(new[]
                 {
-                    txtInputFile.Text,
+                    inputPath,
-                    "--mode", GetSelectedModeValue(),
+                    "--mode", mode,
-                    "--resx", nudResX.Value.ToString(),
+                    "--resx", resX.ToString(),
-                    "--resy", nudResY.Value.ToString(),
+                    "--resy", resY.ToString(),
-                    "--fontsize", nudFontSize.Value.ToString(),
+                    "--baseresx", baseResX.ToString(),
-                    "--offsetx", nudOffsetX.Value.ToString(),
+                    "--baseresy", baseResY.ToString(),
-                    "--output", txtOutputFile.Text
+                    "--fontsize", fontSize.ToString(),
+                    "--offsetx", offsetX.ToString(),
+                    "--bottomoffset", bottomOffset.ToString(),
+                    "--sbssidemargin", sbsSideMargin.ToString(),
+                    "--outopmargin", ouTopMargin.ToString(),
+                    "--verticalmargin", verticalMargin.ToString(),
+                    "--output", outputPath
                 });
 
                 AppendStatus("Conversion complete.");
@@ -140,11 +204,26 @@ namespace ConvertSRTto3DASSGUI
 
         private void UpdateModeUI()
         {
-            string mode = cmbMode.SelectedItem?.ToString() ?? "sbs";
+            string mode = GetSelectedModeValue();
-            bool isRg = mode.Equals("rg", StringComparison.OrdinalIgnoreCase);
+
+            bool isSbs = mode == "sbs";
+            bool isOu = mode == "ou";
+            bool isRg = mode == "rg";
 
             nudOffsetX.Enabled = isRg;
             lblOffsetX.Enabled = isRg;
+
+            nudBottomOffset.Enabled = isRg;
+            lblBottomOffset.Enabled = isRg;
+
+            nudSbsSideMargin.Enabled = isSbs;
+            lblSbsSideMargin.Enabled = isSbs;
+
+            nudOuTopMargin.Enabled = isOu;
+            lblOuTopMargin.Enabled = isOu;
+
+            nudVerticalMargin.Enabled = true;
+            lblVerticalMargin.Enabled = true;
         }
 
         private void AppendStatus(string message)
@@ -154,5 +233,9 @@ namespace ConvertSRTto3DASSGUI
 
             txtStatus.AppendText(message);
         }
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+        }
     }
 }