527: interframe interval = 1/30.43 s  avg=1/25.94  stddev=1/50.60
  527: interframe interval = 1/34.68 s  avg=1/24.43  stddev=1/49.06
  539: interframe interval = 1/33.02 s  avg=1/25.44  stddev=1/51.97
  527: interframe interval = 1/22.19 s  avg=1/25.46  stddev=1/53.17
  539: interframe interval = 1/35.94 s  avg=1/26.62  stddev=1/57.27
  539: interframe interval = 1/26.98 s  avg=1/24.74  stddev=1/50.74
  540: interframe interval = 1/28.49 s  avg=1/24.84  stddev=1/51.69