diff --git a/VideoNodes/FfmpegBuilderNodes/Models/FfmpegSubtitleStream.cs b/VideoNodes/FfmpegBuilderNodes/Models/FfmpegSubtitleStream.cs
index 113e9df0..b03da754 100644
--- a/VideoNodes/FfmpegBuilderNodes/Models/FfmpegSubtitleStream.cs
+++ b/VideoNodes/FfmpegBuilderNodes/Models/FfmpegSubtitleStream.cs
@@ -11,7 +11,7 @@
             if (Deleted)
                 return new string[] { };
 
-            var results = new List<string> { "-map", "0:s:{sourceTypeIndex}", "-c:s:{index}" };
+            List<string> results= new List<string> { "-map", Stream.InputFileIndex + ":s:{sourceTypeIndex}", "-c:s:{index}" };
 
             if(args.DestinationExtension == "mkv" && Stream.Codec == "mov_text")
             {
diff --git a/VideoNodes/FfmpegBuilderNodes/Subtitle/FfmpegBuilderSubtitleTrackMerge.cs b/VideoNodes/FfmpegBuilderNodes/Subtitle/FfmpegBuilderSubtitleTrackMerge.cs
index d876292f..ec236109 100644
--- a/VideoNodes/FfmpegBuilderNodes/Subtitle/FfmpegBuilderSubtitleTrackMerge.cs
+++ b/VideoNodes/FfmpegBuilderNodes/Subtitle/FfmpegBuilderSubtitleTrackMerge.cs
@@ -39,6 +39,9 @@ public class FfmpegBuilderSubtitleTrackMerge : FfmpegBuilderNode
     [Boolean(2)]
     [DefaultValue(true)]
     public bool UseSourceDirectory { get; set; } = true;
+
+    [Boolean(3)]
+    public bool MatchFilename { get; set; }
     
     public override int Execute(NodeParameters args)
     {
@@ -64,11 +67,39 @@ public class FfmpegBuilderSubtitleTrackMerge : FfmpegBuilderNode
             if (Subtitles.Contains(ext) == false)
                 continue;
 
+            if (MatchFilename)
+            {
+                var origFile = new FileInfo(args.FileName);
+                string origFilename = origFile.Name.Replace(origFile.Extension, "");
+                bool matchesOriginal = file.Name.Replace(file.Extension, string.Empty).ToLowerInvariant().Equals(origFilename.ToLowerInvariant());
+
+                var workingFile = new FileInfo(args.WorkingFile);
+                string workingFilename = workingFile.Name.Replace(workingFile.Extension, "");
+                bool matchesWorking = file.Name.Replace(file.Extension, string.Empty).ToLowerInvariant().Equals(workingFilename.ToLowerInvariant());
+
+                if (matchesOriginal == false && matchesWorking == false)
+                    continue;
+            }
+
             args.Logger.ILog("Adding file: " + file.FullName + " [" + ext + "]");
             this.Model.InputFiles.Add(file.FullName);
+            this.Model.SubtitleStreams.Add(new FfmpegSubtitleStream
+            {
+                Stream = new SubtitleStream()
+                {
+                    InputFileIndex = this.Model.InputFiles.Count - 1,
+                    TypeIndex = 0,
+                    Title = file.Name.Replace(file.Extension, ""),
+                    Codec = file.Extension[1..],
+                    IndexString = (this.Model.InputFiles.Count - 1) + ":s:0"
+                },
+                
+            });
             ++count;
         }
         args.Logger.ILog("Subtitles added: " + count);
+        if (count > 0)
+            this.Model.ForceEncode = true;
         return count > 0 ? 1 : 2;
     }
 }
diff --git a/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs b/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs
index f271b2f5..8f7e0181 100644
--- a/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs
+++ b/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs
@@ -1183,6 +1183,42 @@ public class FfmpegBuilder_BasicTests
         string log = logger.ToString();
         Assert.AreEqual(1, result);
     }
+
+
+
+    [TestMethod]
+    public void FfmpegBuilder_SubtitleTrackMerge()
+    {
+        const string file = @"D:\videos\testfiles\dummy.mkv";
+        var logger = new TestLogger();
+        const string ffmpeg = @"C:\utils\ffmpeg\ffmpeg.exe";
+        var vi = new VideoInfoHelper(ffmpeg, logger);
+        var vii = vi.Read(file);
+        var args = new NodeParameters(file, logger, false, string.Empty);
+        args.GetToolPathActual = (string tool) => ffmpeg;
+        args.TempPath = @"D:\videos\temp";
+        args.Parameters.Add("VideoInfo", vii);
+
+
+        FfmpegBuilderStart ffStart = new();
+        ffStart.PreExecute(args);
+        Assert.AreEqual(1, ffStart.Execute(args));
+
+
+        FfmpegBuilderSubtitleTrackMerge ffSubMerge = new();
+        ffSubMerge.Subtitles = new List<string> { "srt" };
+        ffSubMerge.MatchFilename = true;
+        ffSubMerge.PreExecute(args);
+        Assert.AreEqual(1, ffSubMerge.Execute(args));
+
+        FfmpegBuilderExecutor ffExecutor = new();
+        ffExecutor.HardwareDecoding = true;
+        ffExecutor.PreExecute(args);
+        int result = ffExecutor.Execute(args);
+
+        string log = logger.ToString();
+        Assert.AreEqual(1, result);
+    }
 }
 
 #endif
\ No newline at end of file
diff --git a/VideoNodes/VideoInfo.cs b/VideoNodes/VideoInfo.cs
index d3672946..9609c0f2 100644
--- a/VideoNodes/VideoInfo.cs
+++ b/VideoNodes/VideoInfo.cs
@@ -53,6 +53,11 @@ namespace FileFlows.VideoNodes
         /// Gets or sets if the stream is HDR
         /// </summary>
         public bool HDR { get; set; }
+
+        /// <summary>
+        /// Gets or sets the input file index
+        /// </summary>
+        public int InputFileIndex { get; set; } = 0;
     }
 
     public class VideoStream : VideoFileStream
diff --git a/VideoNodes/VideoNodes.en.json b/VideoNodes/VideoNodes.en.json
index 5c413f0d..c0794085 100644
--- a/VideoNodes/VideoNodes.en.json
+++ b/VideoNodes/VideoNodes.en.json
@@ -306,7 +306,9 @@
           "Subtitles": "Subtitles",
           "Subtitles-Help": "Select which subtitles to search for to add",
           "UseSourceDirectory": "Use Source Directory",
-          "UseSourceDirectory-Help": "If checked the original source directory will be searched, otherwise the working directory will be used."
+          "UseSourceDirectory-Help": "If checked the original source directory will be searched, otherwise the working directory will be used.",
+          "MatchFilename": "Match Filename",
+          "MatchFilename-Help": "When checked only subtitles with the same filename as the input file or the working file will be merged"
         }
       },
       "FfmpegBuilderCropBlackBars": {