视频号爬虫增加了cover_url的获取策略，当无法获取 cover_url的时候，会获取 thumb_url

shipinhao/shipinhao_author/shipinhao_scheduling.py

@@ -246,7 +246,7 @@ class ShiPinHaoAccount:
             "like_cnt": 0,
             "share_cnt": 0,
             "user_id": self.user_dict["uid"],
-            "cover_url": video_obj["media"][0]["cover_url"],
+            "cover_url": video_obj["media"][0]["cover_url"] if video_obj['media'][0]['cover_url'] else video_obj['media'][0]['thumb_url'],
             "video_url": video_obj["media"][0]["url"],
             "avatar_url": video_obj["head_url"],
             "width": video_obj["media"][0]["width"],