diff --git a/media/calc_10bit.py b/media/calc_10bit.py
index f741907..7e29eae 100644
--- a/media/calc_10bit.py
+++ b/media/calc_10bit.py
@@ -45,7 +45,7 @@ class S:
         docs = self.col_video.find({}, projection=prj)
         for d in docs[:10]:
             vid = safe_get_int(d, "_id")
-            src_id_h264 = safe_get_str(docs, d)
+            src_id_h264 = safe_get_str(d, "src_id_h264")
             url = host + src_id_h264
             print(vid, url)