diff --git a/youtube_dl/extractor/twitter.py b/youtube_dl/extractor/twitter.py
index 3411fcf7e..94186c924 100644
--- a/youtube_dl/extractor/twitter.py
+++ b/youtube_dl/extractor/twitter.py
@@ -170,7 +170,7 @@ class TwitterCardIE(TwitterBaseIE):
 
                     formats.append(a_format)
 
-            duration = float_or_none(media_info.get('duration', {}).get('nanos'), scale=1e9)
+            duration = float_or_none(media_info.get('duration', {}).get('nanos'), scale=1e12)
 
         self._sort_formats(formats)