diff --git a/DialogToolkit.cpp b/DialogToolkit.cpp
index e200929..01a8786 100644
--- a/DialogToolkit.cpp
+++ b/DialogToolkit.cpp
@@ -60,8 +60,10 @@ void add_filter_file_dialog( GtkWidget *dialog, int const countfilterPatterns, c
     GtkFileFilter *filter;
     filter = gtk_file_filter_new();
     gtk_file_filter_set_name( filter, filterDescription );
-    for (int i = 0; i < countfilterPatterns; i++ )
-        gtk_file_filter_add_pattern( filter, filterPatterns[i] );
+    for (int i = 0; i < countfilterPatterns; i++ ) {
+        gtk_file_filter_add_pattern( filter, g_ascii_strdown(filterPatterns[i], -1) );
+        gtk_file_filter_add_pattern( filter, g_ascii_strup(filterPatterns[i], -1) );
+    }
     gtk_file_chooser_add_filter( GTK_FILE_CHOOSER(dialog), filter );
 }
 
@@ -215,12 +217,12 @@ bool DialogToolkit::MultipleImagesDialog::closed()
 std::string saveSessionFileDialog(const std::string &label, const std::string &path)
 {
     std::string filename = "";
-    char const * save_pattern[2] = { "*.mix", "*.MIX" };
+    char const * save_pattern[1] = { VIMIX_FILES_PATTERN };
 
 #if USE_TINYFILEDIALOG
     char const * save_file_name;
 
-    save_file_name = tinyfd_saveFileDialog( label.c_str(), path.c_str(), 2, save_pattern, "vimix session");
+    save_file_name = tinyfd_saveFileDialog( label.c_str(), path.c_str(), 1, save_pattern, "vimix session");
 
     if (save_file_name)
         filename = std::string(save_file_name);
@@ -237,7 +239,7 @@ std::string saveSessionFileDialog(const std::string &label, const std::string &p
     gtk_file_chooser_set_do_overwrite_confirmation( GTK_FILE_CHOOSER(dialog), TRUE );
 
     // set file filters
-    add_filter_file_dialog(dialog, 2, save_pattern, "vimix session");
+    add_filter_file_dialog(dialog, 1, save_pattern, "vimix session");
     add_filter_any_file_dialog(dialog);
 
     // Set the default path
@@ -277,11 +279,11 @@ std::string openSessionFileDialog(const std::string &label, const std::string &p
 {
     std::string filename = "";
     std::string startpath = SystemToolkit::file_exists(path) ? path : SystemToolkit::home_path();
-    char const * open_pattern[2] = { "*.mix", "*.MIX" };
+    char const * open_pattern[1] = { VIMIX_FILES_PATTERN };
 
 #if USE_TINYFILEDIALOG
     char const * open_file_name;
-    open_file_name = tinyfd_openFileDialog( label.c_str(), startpath.c_str(), 2, open_pattern, "vimix session", 0);
+    open_file_name = tinyfd_openFileDialog( label.c_str(), startpath.c_str(), 1, open_pattern, "vimix session", 0);
 
     if (open_file_name)
         filename = std::string(open_file_name);
@@ -297,7 +299,7 @@ std::string openSessionFileDialog(const std::string &label, const std::string &p
                                               "_Open", GTK_RESPONSE_ACCEPT,  NULL );
 
     // set file filters
-    add_filter_file_dialog(dialog, 2, open_pattern, "vimix session");
+    add_filter_file_dialog(dialog, 1, open_pattern, "vimix session");
     add_filter_any_file_dialog(dialog);
 
     // Set the default path
@@ -333,17 +335,11 @@ std::string openMediaFileDialog(const std::string &label, const std::string &pat
 {
     std::string filename = "";
     std::string startpath = SystemToolkit::file_exists(path) ? path : SystemToolkit::home_path();
-    char const * open_pattern[52] = { "*.mix", "*.mp4", "*.mpg", "*.mpeg", "*.m2v", "*.m4v", "*.avi", "*.mov",
-                                      "*.mkv", "*.webm", "*.mod", "*.wmv", "*.mxf", "*.ogg",
-                                      "*.flv", "*.hevc", "*.asf", "*.jpg", "*.png",  "*.gif",
-                                      "*.tif", "*.tiff", "*.webp", "*.bmp", "*.ppm", "*.svg,"
-                                      "*.MIX", "*.MP4", "*.MPG", "*.MPEG","*.M2V", "*.M4V", "*.AVI", "*.MOV",
-                                      "*.MKV", "*.WEBM", "*.MOD", "*.WMV", "*.MXF", "*.OGG",
-                                      "*.FLV", "*.HEVC", "*.ASF", "*.JPG", "*.PNG",  "*.GIF",
-                                      "*.TIF", "*.TIFF", "*.WEBP", "*.BMP", "*.PPM", "*.SVG"  };
+    char const * open_pattern[26] = { MEDIA_FILES_PATTERN };
+
 #if USE_TINYFILEDIALOG
     char const * open_file_name;
-    open_file_name = tinyfd_openFileDialog( label.c_str(), startpath.c_str(), 18, open_pattern, "All supported formats", 0);
+    open_file_name = tinyfd_openFileDialog( label.c_str(), startpath.c_str(), 26, open_pattern, "All supported formats", 0);
 
     if (open_file_name)
         filename = std::string(open_file_name);
@@ -360,7 +356,7 @@ std::string openMediaFileDialog(const std::string &label, const std::string &pat
                                               "_Open", GTK_RESPONSE_ACCEPT,  NULL );
 
     // set file filters
-    add_filter_file_dialog(dialog, 52, open_pattern, "Supported formats (videos, images, sessions)");
+    add_filter_file_dialog(dialog, 26, open_pattern, "Supported formats (videos, images, sessions)");
     add_filter_any_file_dialog(dialog);
 
     // Set the default path
@@ -396,11 +392,11 @@ std::string openImageFileDialog(const std::string &label, const std::string &pat
 {
     std::string filename = "";
     std::string startpath = SystemToolkit::file_exists(path) ? path : SystemToolkit::home_path();
-    char const * open_pattern[10] = { "*.jpg", "*.png", "*.bmp", "*.ppm", "*.gif",
-                                      "*.JPG", "*.PNG", "*.BMP", "*.PPM", "*.GIF"};
+    char const * open_pattern[5] = { IMAGES_FILES_PATTERN };
+
 #if USE_TINYFILEDIALOG
     char const * open_file_name;
-    open_file_name = tinyfd_openFileDialog( label.c_str(), startpath.c_str(), 4, open_pattern, "Image JPG or PNG", 0);
+    open_file_name = tinyfd_openFileDialog( label.c_str(), startpath.c_str(), 5, open_pattern, "Image (JPG, PNG, BMP, PPM, GIF)", 0);
 
     if (open_file_name)
         filename = std::string(open_file_name);
@@ -417,7 +413,7 @@ std::string openImageFileDialog(const std::string &label, const std::string &pat
                                               "_Open", GTK_RESPONSE_ACCEPT,  NULL );
 
     // set file filters
-    add_filter_file_dialog(dialog, 10, open_pattern, "Image (JPG, PNG, BMP, PPM, GIF)");
+    add_filter_file_dialog(dialog, 5, open_pattern, "Image (JPG, PNG, BMP, PPM, GIF)");
     add_filter_any_file_dialog(dialog);
 
     // Set the default path
@@ -506,12 +502,11 @@ std::list<std::string> selectImagesFileDialog(const std::string &label,const std
     std::list<std::string> files;
 
     std::string startpath = SystemToolkit::file_exists(path) ? path : SystemToolkit::home_path();
-    char const * open_pattern[6] = {  "*.jpg", "*.png", "*.tif",
-                                      "*.JPG", "*.PNG", "*.TIF"  };
+    char const * open_pattern[6] = {  "*.jpg", "*.png", "*.tif" };
 
 #if USE_TINYFILEDIALOG
     char const * open_file_names;
-    open_file_names = tinyfd_openFileDialog(label.c_str(), startpath.c_str(), 6, open_pattern, "Images", 1);
+    open_file_names = tinyfd_openFileDialog(label.c_str(), startpath.c_str(), 3, open_pattern, "Images (JPG, PNG, TIF)", 1);
 
     if (open_file_names) {
 
@@ -547,7 +542,7 @@ std::list<std::string> selectImagesFileDialog(const std::string &label,const std
                                               "_Open", GTK_RESPONSE_ACCEPT,  NULL );
 
     // set file filters
-    add_filter_file_dialog(dialog, 6, open_pattern, "Images (JPG, PNG, TIF)");
+    add_filter_file_dialog(dialog, 3, open_pattern, "Images (JPG, PNG, TIF)");
     add_filter_any_file_dialog(dialog);
 
     // multiple files
diff --git a/DialogToolkit.h b/DialogToolkit.h
index c512b66..d4e5483 100644
--- a/DialogToolkit.h
+++ b/DialogToolkit.h
@@ -6,6 +6,12 @@
 #include <vector>
 #include <future>
 
+#define VIMIX_FILES_PATTERN "*.mix"
+#define MEDIA_FILES_PATTERN "*.mix", "*.mp4", "*.mpg", "*.mpeg", "*.m2v", "*.m4v", "*.avi", "*.mov",\
+    "*.mkv", "*.webm", "*.mod", "*.wmv", "*.mxf", "*.ogg",\
+    "*.flv", "*.hevc", "*.asf", "*.jpg", "*.png",  "*.gif",\
+    "*.tif", "*.tiff", "*.webp", "*.bmp", "*.ppm", "*.svg,"
+#define IMAGES_FILES_PATTERN "*.jpg", "*.png", "*.bmp", "*.ppm", "*.gif"
 
 namespace DialogToolkit
 {