diff --git a/.github/workflows/dvrescue-gui.yml b/.github/workflows/dvrescue-gui.yml
index c1e1ac83..c6d1dabe 100644
--- a/.github/workflows/dvrescue-gui.yml
+++ b/.github/workflows/dvrescue-gui.yml
@@ -11,7 +11,7 @@ jobs:
         compiler: ['clang-9']
         include:
           - compiler: clang-9
-            packages: llvm@13
+            packages: llvm@15
             env: { 'CC': 'clang', 'CXX': 'clang++' }
 
     runs-on: macos-latest
@@ -72,7 +72,7 @@ jobs:
         compiler: ['clang-9']
         include:
           - compiler: clang-9
-            packages: llvm@13
+            packages: llvm@15
             env: { 'CC': 'clang-9', 'CXX': 'clang++-9', 'HOMEBREW_NO_INSTALL_CLEANUP': '1', 'HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK': '1' }
           - qt_version: "6.5.*"
             qt_modules: "qtmultimedia"
@@ -140,7 +140,7 @@ jobs:
         compiler: ['clang-9']
         include:
           - compiler: clang-9
-            packages: llvm@13
+            packages: llvm@15
             env: { 'CC': 'clang', 'CXX': 'clang++' }
 
     runs-on: macos-latest
@@ -218,7 +218,7 @@ jobs:
         compiler: ['clang-9']
         include:
           - compiler: clang-9
-            packages: llvm@13
+            packages: llvm@15
             env: { 'CC': 'clang-9', 'CXX': 'clang++-9', 'HOMEBREW_NO_INSTALL_CLEANUP': '1', 'HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK': '1' }
           - qt_version: "6.5.*"
             qt_modules: "qtmultimedia"
@@ -327,10 +327,10 @@ jobs:
             -c protocol.version=2 \
             submodule update --init --force --recursive --depth=1
 
-    - name: Install Python 3.7 version
+    - name: Install Python 3.10 version
       uses: actions/setup-python@v1
       with:
-        python-version: '3.7'
+        python-version: '3.10'
         architecture: 'x64'
 
     - name: Install compiler and FFmpeg dependencies
@@ -411,10 +411,10 @@ jobs:
             -c protocol.version=2 \
             submodule update --init --force --recursive --depth=1
 
-    - name: Install Python 3.7 version
+    - name: Install Python 3.10 version
       uses: actions/setup-python@v1
       with:
-        python-version: '3.7'
+        python-version: '3.10'
         architecture: 'x64'
 
     - name: Install compiler and FFmpeg dependencies
diff --git a/Source/ThirdParty/ccdecoder/ccdecoder_subrip.c b/Source/ThirdParty/ccdecoder/ccdecoder_subrip.c
index 9033c45f..9c25f38a 100644
--- a/Source/ThirdParty/ccdecoder/ccdecoder_subrip.c
+++ b/Source/ThirdParty/ccdecoder/ccdecoder_subrip.c
@@ -54,8 +54,11 @@ void to_timestamp(double Value_Double, wchar_t Result[20])
 
     /* Hours */
     Hours=value/(60*60*1000);
-    if (Hours>=1000)
-        return; /* Not supported */
+    if (Hours>=1000) /* Not supported */
+    {
+        memcpy(Result, L"??:??:??.???", 13*sizeof(wchar_t));
+        return;
+    }
     if (Hours>=100)
     {
         Result[pos]=L'0'+(wchar_t)Hours/100;
@@ -160,7 +163,7 @@ wchar_t* ccdecoder_subrip_parse(ccdecoder_subrip_handle* handle, ccdecoder_capti
         to_timestamp(priv->pts, pts_In);
         to_timestamp(pts, pts_Out);
         swprintf(ToReturn_Current, ToReturn_size, L"%i\n", (int)priv->Number); ToReturn_Current+=wcslen(ToReturn_Current);
-        swprintf(ToReturn_Current, ToReturn_size, L"%ls --> %ls\n", pts_In, pts_Out); ToReturn_Current+=wcslen(ToReturn_Current);
+        swprintf(ToReturn_Current, ToReturn_size-(ToReturn_Current-ToReturn), L"%ls --> %ls\n", pts_In, pts_Out); ToReturn_Current+=wcslen(ToReturn_Current);
         for (Output_Y=0; priv->Characters[Output_Y][0].value; Output_Y++)
         {
             uint8_t attributes=ccdecoder_noattribute;