From 984f9233c49ce99c2d754c143b95ce5674e3121f Mon Sep 17 00:00:00 2001
From: Simon Sawicki <contact@grub4k.xyz>
Date: Sat, 16 Nov 2024 00:13:12 +0100
Subject: [PATCH] [ie/rutube] Use `subs_list_to_dict`

---
 yt_dlp/extractor/common.py |  2 +-
 yt_dlp/extractor/rutube.py | 15 +++++++++------
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 01915acf23..bbb896679a 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -3767,7 +3767,7 @@ class InfoExtractor:
         """ Merge subtitle dictionaries, language by language. """
         if target is None:
             target = {}
-        for d in dicts:
+        for d in filter(None, dicts):
             for lang, subs in d.items():
                 target[lang] = cls._merge_subtitle_items(target.get(lang, []), subs)
         return target
diff --git a/yt_dlp/extractor/rutube.py b/yt_dlp/extractor/rutube.py
index abf9aec727..20365ac5d1 100644
--- a/yt_dlp/extractor/rutube.py
+++ b/yt_dlp/extractor/rutube.py
@@ -13,7 +13,10 @@ from ..utils import (
     unified_timestamp,
     url_or_none,
 )
-from ..utils.traversal import traverse_obj
+from ..utils.traversal import (
+    subs_list_to_dict,
+    traverse_obj,
+)
 
 
 class RutubeBaseIE(InfoExtractor):
@@ -92,11 +95,11 @@ class RutubeBaseIE(InfoExtractor):
                 hls_url, video_id, 'mp4', fatal=False, m3u8_id='hls')
             formats.extend(fmts)
             self._merge_subtitles(subs, target=subtitles)
-        for caption in traverse_obj(options, ('captions', lambda _, v: url_or_none(v['file']))):
-            subtitles.setdefault(caption.get('code') or 'ru', []).append({
-                'url': caption['file'],
-                'name': caption.get('langTitle'),
-            })
+        self._merge_subtitles(traverse_obj(options, ('captions', ..., {
+            'id': 'code',
+            'url': 'file',
+            'name': ('langTitle', {str}),
+        }, all, {subs_list_to_dict(lang='ru')})), target=subtitles)
         return formats, subtitles
 
     def _download_and_extract_formats_and_subtitles(self, video_id, query=None):