diff --git a/video_decoder.py b/video_decoder.py
index d36f305..ae37526 100644
--- a/video_decoder.py
+++ b/video_decoder.py
@@ -39,7 +39,7 @@ class VideoDecoder(PyOperator):
         elif self._sample_type.lower() == SAMPLE_TYPE.UNIFORM_TEMPORAL_SUBSAMPLE:
             end_time = self._end_time if self._end_time is not None and self._end_time <= duration else duration
             start_time = self._start_time if self._start_time is not None else 0
-            nums = int(stream.rate * (end_time - start_time))
+            nums = int(stream.average_rate * (end_time - start_time))
             return partial(self._uniform_temporal_subsample, total_frames=nums)
         elif self._sample_type.lower() == SAMPLE_TYPE.TIME_STEP_SAMPLE:
             start_time = self._start_time if self._start_time is not None else 0