clear stream info
diff --git a/src/you_get/extractors/bilibili.py b/src/you_get/extractors/bilibili.py
index 49334d5bd7..c61a0567d0 100644
--- a/src/you_get/extractors/bilibili.py
+++ b/src/you_get/extractors/bilibili.py
@@ -141,6 +141,8 @@ def url_size(url, faker=False, headers={},err_value=0):
 
     def prepare(self, **kwargs):
         self.stream_qualities = {s['quality']: s for s in self.stream_types}
+        self.streams.clear()
+        self.dash_streams.clear()
 
         try:
             html_content = get_content(self.url, headers=self.bilibili_headers(referer=self.url))

When download video consecutively, like ```you-get -I download.txt ...```, previous stream info is not clear, may cause download wrong video.
连续下载，例如使用-I模式时，前一个视频的信息未被清除，导致下载视频错误