[bilibili] Fix extraction for videos without backup_url (#10647)

[youtube-dl] / youtube_dl / extractor / bilibili.py

diff --git a/youtube_dl/extractor/bilibili.py b/youtube_dl/extractor/bilibili.py
index 9f5c12ab91a90e1da10f066423e173f8e4c92a4a..2d174e6f9a81da7412cd58ac316c7b5924dcde78 100644 (file)
--- a/youtube_dl/extractor/bilibili.py
+++ b/youtube_dl/extractor/bilibili.py
@@ -67,7 +67,7 @@ class BiliBiliIE(InfoExtractor):
                 'url': durl['url'],
                 'filesize': int_or_none(durl['size']),
             }]
-            for backup_url in durl['backup_url']:
+            for backup_url in durl.get('backup_url', []):
                 formats.append({
                     'url': backup_url,
                     # backup URLs have lower priorities