Protect setWindowTitle from being called by a different thread (preview_thread - if sample_rate is updated). Protect preview_thread::update() method from triggering with 'sample_rate' update.

Author: jonoomph

src/windows/main_window.py

@@ -2545,26 +2545,17 @@ def SetWindowTitle(self, profile=None):
 
         # Is this a saved project?
         if not app.project.current_filepath:
-            # Not saved yet
-            self.setWindowTitle(
-                "%s %s [%s] - %s" % (
-                    save_indicator,
-                    _("Untitled Project"),
-                    profile,
-                    "OpenShot Video Editor",
-                    ))
+            # Not saved yet (use singleShot since this method can be invoked by our preview thread)
+            QTimer.singleShot(0, functools.partial(self.setWindowTitle,
+                "%s %s [%s] - %s" % (save_indicator, _("Untitled Project"), profile, "OpenShot Video Editor")))
         else:
             # Yes, project is saved
             # Get just the filename
             filename = os.path.basename(app.project.current_filepath)
             filename = os.path.splitext(filename)[0]
-            self.setWindowTitle(
-                "%s %s [%s] - %s" % (
-                    save_indicator,
-                    filename,
-                    profile,
-                    "OpenShot Video Editor",
-                    ))
+            # Use singleShot since this method can be invoked by our preview thread
+            QTimer.singleShot(0, functools.partial(self.setWindowTitle,
+                "%s %s [%s] - %s" % (save_indicator, filename, profile, "OpenShot Video Editor")))
 
     # Update undo and redo buttons enabled/disabled to available changes
     def updateStatusChanged(self, undo_status, redo_status):

src/windows/preview_thread.py

@@ -45,7 +45,8 @@ def changed(self, action):
         """ This method is invoked by the UpdateManager each time a change happens (i.e UpdateInterface) """
 
         # Ignore changes that don't affect libopenshot
-        if len(action.key) >= 1 and action.key[0].lower() in ["files", "history", "markers", "layers", "scale", "profile"]:
+        if len(action.key) >= 1 and action.key[0].lower() in ["files", "history", "markers", "layers",
+                                                              "scale", "profile", "sample_rate"]:
             return
 
         try: