diff --git a/frigate/record.py b/frigate/record.py
index 21e42dfc0..4b0b4ed15 100644
--- a/frigate/record.py
+++ b/frigate/record.py
@@ -169,6 +169,11 @@ class RecordingMaintainer(threading.Thread):
                     p = sp.run(ffprobe_cmd, capture_output=True)
                     if p.returncode == 0 and p.stdout.decode():
                         duration = float(p.stdout.decode().strip())
+                    else:
+                        duration = -1
+
+                    # ensure duration is within expected length
+                    if 0 < duration < 600:
                         end_time = start_time + datetime.timedelta(seconds=duration)
                         self.end_time_cache[cache_path] = (end_time, duration)
                     else: