skip folders without scene.json

render.py

@@ -626,7 +626,10 @@ def update_subtitles(options):
     base_prefix = prefix / 'render' / str(base)
     for folder in os.listdir(base_prefix):
         folder = base_prefix / folder
-        with open(folder / "scene.json") as fd:
+        scene_json = folder / "scene.json"
+        if not os.path.exists(scene_json):
+            continue
+        with open(scene_json) as fd:
             scene = json.load(fd)
         offset = 0
         subs = []