update all subtitles

render.py

@@ -825,9 +825,16 @@ def load_defaults(options):
 
 def update_subtitles(options):
     import item.models
-
     options = load_defaults(options)
     prefix = Path(options['prefix'])
+
+    if options['offset'] is None:
+        offsets = [int(folder) for folder in os.listdir(prefix / 'render') if folder.isdigit()]
+        for offset in offsets:
+            options['offset'] = offset
+            update_subtitles(options)
+        return
+
     base = int(options['offset'])
     lang, tlang = parse_lang(options["lang"])