The --record-length parameter in k4arecorder does not match the actual length of the recorded video

[Kratos-Wen]

Hello, when I use the command:

k4arecorder -d NFOV_UNBINNED -c 720p -r [record length] -l 15 --imu OFF /my/output/directory

to record, if I set the recording time to 60, I end up with a video of about 102 seconds. If the recording time is set to 3600, the resulting video is around 6240 seconds. I'm wondering if this discrepancy is related to my hardware, or if the clock that your time calculation is based on is inaccurate.

Expected behavior:
The length of the output video matches the set recording length.

Desktop (please complete the following information):

• OS with Version: Ubuntu 20.04.6 LTS
• SDK Version: v 1.4.1
• Firmware version:
  RGB camera firmware: 1.6.110
  Depth camera firmware: 1.6.80
  Depth config file: 6109.7
  Audio firmware: 1.6.14
  Build Config: Production
  Certificate Type: Microsoft