diff --git a/unshackle/core/manifests/dash.py b/unshackle/core/manifests/dash.py
index 3e7913b..a2c92a3 100644
--- a/unshackle/core/manifests/dash.py
+++ b/unshackle/core/manifests/dash.py
@@ -372,6 +372,9 @@ class DASH:
 
                 if not end_number:
                     end_number = len(segment_durations)
+                # Handle high startNumber in DVR/catch-up manifests where startNumber > segment count
+                if start_number > end_number:
+                    end_number = start_number + len(segment_durations) - 1
 
                 for t, n in zip(segment_durations, range(start_number, end_number + 1)):
                     segments.append(