diff --git a/mpv.net/Misc/Command.cs b/mpv.net/Misc/Command.cs
index 2908958..93d980a 100644
--- a/mpv.net/Misc/Command.cs
+++ b/mpv.net/Misc/Command.cs
@@ -203,7 +203,6 @@ namespace mpvnet
                 {
                     d.InitialDirectory = Path.GetDirectoryName(mp.get_property_string("path", false));
                     d.Multiselect = true;
-
                     if (d.ShowDialog() == DialogResult.OK)
                         foreach (string i in d.FileNames)
                             mp.commandv("sub-add", i);
diff --git a/mpv.net/Misc/Misc.cs b/mpv.net/Misc/Misc.cs
index dfd920d..10c701b 100644
--- a/mpv.net/Misc/Misc.cs
+++ b/mpv.net/Misc/Misc.cs
@@ -17,8 +17,9 @@ namespace mpvnet
 {
     public class App
     {
-        public static string[] VideoTypes { get; } = "mkv mp4 mpg avi mov webm vob wmv flv avs 264 h264 asf webm mpeg mpv y4m avc hevc 265 h265 m2v m2ts vpy mts m4v".Split(" ".ToCharArray());
-        public static string[] AudioTypes { get; } = "mp3 mp2 ac3 ogg opus flac wav w64 m4a dts dtsma dtshr dtshd eac3 thd thd+ac3 mka aac mpa".Split(" ".ToCharArray());
+        public static string[] VideoTypes    { get; } = "mkv mp4 mpg avi mov webm vob wmv flv avs 264 h264 asf webm mpeg mpv y4m avc hevc 265 h265 m2v m2ts vpy mts m4v".Split(' ');
+        public static string[] AudioTypes    { get; } = "mp3 mp2 ac3 ogg opus flac wav w64 m4a dts dtsma dtshr dtshd eac3 thd thd+ac3 mka aac mpa".Split(' ');
+        public static string[] SubtitleTypes { get; } = "srt ass idx sup ttxt ssa smi".Split(' ');
 
         public static bool IsDarkMode { 
             get {
diff --git a/mpv.net/Resources/mpvConfToml.txt b/mpv.net/Resources/mpvConfToml.txt
index 2671cc3..92d6c3a 100644
--- a/mpv.net/Resources/mpvConfToml.txt
+++ b/mpv.net/Resources/mpvConfToml.txt
@@ -202,7 +202,7 @@ name = "sub-border-color"
 default = ""
 type = "color"
 filter = "Subtitle"
-help = "See --sub-color. Color used for the sub font border. Ignored when sub-back-color is specified (or more exactly: when that option is not set to completely transparent)."
+help = "See sub-color. Color used for the sub font border. Ignored when sub-back-color is specified (or more exactly: when that option is not set to completely transparent)."
 
 [[settings]]
 name = "sub-back-color"
diff --git a/mpv.net/mpv/mp.cs b/mpv.net/mpv/mp.cs
index d6c60a2..b3c0b21 100644
--- a/mpv.net/mpv/mp.cs
+++ b/mpv.net/mpv/mp.cs
@@ -562,6 +562,18 @@ namespace mpvnet
         {
             if (files is null || files.Length == 0) return;
             HideLogo();
+            List<string> fileList = files.ToList();
+
+            foreach (string file in files) {
+                string ext = Path.GetExtension(file).TrimStart('.').ToLower();
+                if (App.SubtitleTypes.Contains(ext)) {
+                    mp.commandv("sub-add", file);
+                    fileList.Remove(file);
+                }
+            }
+
+            if (fileList.Count == 0) return;
+            files = fileList.ToArray();
             int count = mp.get_property_int("playlist-count");
 
             foreach (string file in files)