Experimental launch.py changes, to remove our main() function and add some additional protection for render_cache_json() timer during shutdown.

Author: jonoomph

src/launch.py

@@ -52,7 +52,7 @@
     from classes import info
 
 
-def main():
+if __name__ == "__main__":
     """"Initialize settings (not implemented) and create main window/application."""
 
     parser = argparse.ArgumentParser(description = 'OpenShot version ' + info.SETUP['version'])
@@ -141,7 +141,3 @@ def main():
 
     # Run and return result
     sys.exit(app.run())
-
-
-if __name__ == "__main__":
-    main()

src/windows/views/webview.py

@@ -3145,20 +3145,21 @@ def render_cache_json(self):
 
         # Get final cache object from timeline
         try:
-            cache_object = self.window.timeline_sync.timeline.GetCache()
-            if not cache_object or cache_object.Count() <= 0:
-                return
-            # Get the JSON from the cache object (i.e. which frames are cached)
-            cache_json = self.window.timeline_sync.timeline.GetCache().Json()
-            cache_dict = json.loads(cache_json)
-            cache_version = cache_dict["version"]
-
-            if self.cache_renderer_version == cache_version:
-                # Nothing has changed, ignore
-                return
-            # Cache has changed, re-render it
-            self.cache_renderer_version = cache_version
-            self.run_js(JS_SCOPE_SELECTOR + ".renderCache({});".format(cache_json))
+            if self.window.timeline_sync and self.window.timeline_sync.timeline:
+                cache_object = self.window.timeline_sync.timeline.GetCache()
+                if not cache_object or cache_object.Count() <= 0:
+                    return
+                # Get the JSON from the cache object (i.e. which frames are cached)
+                cache_json = self.window.timeline_sync.timeline.GetCache().Json()
+                cache_dict = json.loads(cache_json)
+                cache_version = cache_dict["version"]
+
+                if self.cache_renderer_version == cache_version:
+                    # Nothing has changed, ignore
+                    return
+                # Cache has changed, re-render it
+                self.cache_renderer_version = cache_version
+                self.run_js(JS_SCOPE_SELECTOR + ".renderCache({});".format(cache_json))
         except Exception as ex:
             # Log the exception and ignore
             log.warning("Exception processing timeline cache: %s", ex)