diff --git a/src/Forms/Main.cs b/src/Forms/Main.cs
index 2f28ea9a5..b4f81186b 100644
--- a/src/Forms/Main.cs
+++ b/src/Forms/Main.cs
@@ -387,6 +387,15 @@ namespace Nikse.SubtitleEdit.Forms
                         format = cavena890;
                     }
                 }
+                if (format == null)
+                {
+                    var spt = new Spt();
+                    if (spt.IsMine(null, fileName))
+                    {
+                        spt.LoadSubtitle(sub, null, fileName);
+                        format = spt;
+                    }
+                }
 
                 if (format == null)
                 {
@@ -1318,6 +1327,19 @@ namespace Nikse.SubtitleEdit.Forms
                     }
                 }
 
+                if (format == null)
+                {
+                    var spt = new Spt();
+                    if (spt.IsMine(null, fileName))
+                    {
+                        spt.LoadSubtitle(_subtitle, null, fileName);
+                        _oldSubtitleFormat = spt;
+                        SetFormatToSubRip();
+                        justConverted = true;
+                        format = GetCurrentSubtitleFormat();
+                    }
+                }
+
                 if (format == null)
                 {
                     var bdnXml = new BdnXml();
diff --git a/src/Forms/Main.resx b/src/Forms/Main.resx
index 9f847b8d4..e6c0d71f9 100644
--- a/src/Forms/Main.resx
+++ b/src/Forms/Main.resx
@@ -684,7 +684,7 @@
         AAEAAAD/////AQAAAAAAAAAMAgAAAFdTeXN0ZW0uV2luZG93cy5Gb3JtcywgVmVyc2lvbj00LjAuMC4w
         LCBDdWx0dXJlPW5ldXRyYWwsIFB1YmxpY0tleVRva2VuPWI3N2E1YzU2MTkzNGUwODkFAQAAACZTeXN0
         ZW0uV2luZG93cy5Gb3Jtcy5JbWFnZUxpc3RTdHJlYW1lcgEAAAAERGF0YQcCAgAAAAkDAAAADwMAAAD2
-        CAAAAk1TRnQBSQFMAgEBAgEAAVgBBwFYAQcBEAEAARABAAT/AQkBAAj/AUIBTQE2AQQGAAE2AQQCAAEo
+        CAAAAk1TRnQBSQFMAgEBAgEAAWABBwFgAQcBEAEAARABAAT/AQkBAAj/AUIBTQE2AQQGAAE2AQQCAAEo
         AwABQAMAARADAAEBAQABCAYAAQQYAAGAAgABgAMAAoABAAGAAwABgAEAAYABAAKAAgADwAEAAcAB3AHA
         AQAB8AHKAaYBAAEzBQABMwEAATMBAAEzAQACMwIAAxYBAAMcAQADIgEAAykBAANVAQADTQEAA0IBAAM5
         AQABgAF8Af8BAAJQAf8BAAGTAQAB1gEAAf8B7AHMAQABxgHWAe8BAAHWAucBAAGQAakBrQIAAf8BMwMA
diff --git a/src/Logic/SubtitleFormats/Spt.cs b/src/Logic/SubtitleFormats/Spt.cs
new file mode 100644
index 000000000..ee2123aec
--- /dev/null
+++ b/src/Logic/SubtitleFormats/Spt.cs
@@ -0,0 +1,168 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+namespace Nikse.SubtitleEdit.Logic.SubtitleFormats
+{
+    class Spt : SubtitleFormat
+    {
+        public override string Extension
+        {
+            get { return ".spt"; }
+        }
+
+        public override string Name
+        {
+            get { return "spt"; }
+        }
+
+        public override bool HasLineNumber
+        {
+            get { return false; }
+        }
+
+        public override bool IsTimeBased
+        {
+            get { return true; }
+        }
+
+        public void Save(string fileName, Subtitle subtitle)
+        {
+            FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write);
+
+            // header
+            fs.WriteByte(1);
+            for (int i = 1; i < 23; i++)
+                fs.WriteByte(0);
+            fs.WriteByte(0x60);
+
+            // paragraphs
+            int number = 0;
+            foreach (Paragraph p in subtitle.Paragraphs)
+            {
+                WriteParagraph(fs, p, number);
+                number++;
+            }
+
+            // footer
+            fs.WriteByte(0xff);
+            for (int i = 0; i < 11; i++)
+                fs.WriteByte(0);
+            fs.WriteByte(0x11);
+            byte[] footerBuffer = System.Text.Encoding.ASCII.GetBytes("dummy end of file");
+            fs.Write(footerBuffer, 0, footerBuffer.Length);
+
+            fs.Close();
+        }
+
+        private void WriteParagraph(FileStream fs, Paragraph p, int number)
+        {
+            WriteTimeCode(fs, p.StartTime);
+            WriteTimeCode(fs, p.EndTime);
+
+            string text = p.Text; 
+            if (Utilities.CountTagInText(text, Environment.NewLine)> 1)
+                text = Utilities.AutoBreakLine(p.Text);
+
+            string[] lines = text.Split(Environment.NewLine.ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
+            int textLengthFirstLine = 0;
+            int textLengthSecondLine = 0;
+            if (lines.Length > 0)
+            {
+                textLengthFirstLine = lines[0].Length;
+                if (lines.Length > 1)
+                    textLengthSecondLine = lines[1].Length;
+            }
+        }
+
+        private void WriteTimeCode(FileStream fs, TimeCode timeCode)
+        {
+            // write 8 bytes time code
+        }
+
+        public override bool IsMine(List<string> lines, string fileName)
+        {
+            if (!string.IsNullOrEmpty(fileName) && File.Exists(fileName))
+            {
+                FileInfo fi = new FileInfo(fileName);
+                if (fi.Length > 100 && fi.Length < 1024000) // not too small or too big
+                {
+                    byte[] buffer = File.ReadAllBytes(fileName);
+
+                    if (buffer[00] > 10 && 
+                        buffer[01] == 0 &&
+                        fileName.ToLower().EndsWith(".spt"))
+                        return true;
+                }
+            }
+            return false;
+        }
+
+        public override string ToText(Subtitle subtitle, string title)
+        {
+            return "Not supported!";
+        }
+
+        public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
+        {
+            subtitle.Paragraphs.Clear();
+            byte[] buffer = File.ReadAllBytes(fileName);
+
+            int index = buffer[0]; // go to first subtitle paragraph
+            while (index < buffer.Length)
+            {
+                Paragraph p = GetPacParagraph(ref index, buffer);
+                if (p != null)
+                    subtitle.Paragraphs.Add(p);
+            }
+            subtitle.Renumber(1);
+        }
+
+        private Paragraph GetPacParagraph(ref int index, byte[] buffer)
+        {
+            if (index + 16 + 20 + 4 >= buffer.Length)
+                return null;
+
+            int textLengthFirstLine = buffer[index + 16 + 20];
+            int textLengthSecondLine = buffer[index + 16 + 20 + 4];
+
+            try
+            {
+
+                var p = new Paragraph();
+                p.StartTime = GetTimeCode(Encoding.Default.GetString(buffer, index, 8));
+                p.EndTime = GetTimeCode(Encoding.Default.GetString(buffer, index + 8, 8));
+
+                p.Text = Encoding.Default.GetString(buffer, index + 16 + 20 + 16, textLengthFirstLine);
+
+                if (textLengthSecondLine > 0)
+                    p.Text += Environment.NewLine + Encoding.Default.GetString(buffer, index + 16 + 20 + 16 + textLengthFirstLine, textLengthSecondLine);
+
+                index += (16 + 20 + 16 + textLengthFirstLine + textLengthSecondLine);
+                return p;
+            }
+            catch
+            {
+                index += (16 + 20 + 16 + textLengthFirstLine + textLengthSecondLine);
+                _errorCount++;
+                return null;
+            }
+        }
+
+        private TimeCode GetTimeCode(string timeCode)
+        {
+            int hour = int.Parse(timeCode.Substring(0, 2));
+            int minute = int.Parse(timeCode.Substring(2, 2));
+            int second = int.Parse(timeCode.Substring(4, 2));
+            int frames = int.Parse(timeCode.Substring(6, 2));
+
+            int milliseconds = (int)((1000 / Configuration.Settings.General.CurrentFrameRate) * frames);
+            if (milliseconds > 999)
+                milliseconds = 999;
+
+            return new TimeCode(hour, minute, second, milliseconds);
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/src/Logic/Utilities.cs b/src/Logic/Utilities.cs
index 2a375bcbc..6c9bdf2a0 100644
--- a/src/Logic/Utilities.cs
+++ b/src/Logic/Utilities.cs
@@ -1089,6 +1089,7 @@ namespace Nikse.SubtitleEdit.Logic
             }
             sb.Append("*" + new Pac().Extension + ";");
             sb.Append("*" + new Cavena890().Extension + ";");
+            sb.Append("*" + new Spt().Extension + ";");
             sb.Append("*.sup");
             sb.Append("|" + Configuration.Settings.Language.General.AllFiles + "|*.*");
             return sb.ToString();
diff --git a/src/SubtitleEdit.csproj b/src/SubtitleEdit.csproj
index 8e3aea621..7ec6faf79 100644
--- a/src/SubtitleEdit.csproj
+++ b/src/SubtitleEdit.csproj
@@ -559,6 +559,7 @@
     <Compile Include="Logic\SubtitleFormats\Ebu.cs" />
     <Compile Include="Logic\SubtitleFormats\SonyDVDArchitect.cs" />
     <Compile Include="Logic\SubtitleFormats\Spruce.cs" />
+    <Compile Include="Logic\SubtitleFormats\Spt.cs" />
     <Compile Include="Logic\SubtitleFormats\SubtitleEditorProject.cs" />
     <Compile Include="Logic\SubtitleFormats\TimedText10.cs" />
     <Compile Include="Logic\SubtitleFormats\TranscriberXml.cs" />