Can't calibrate on windows

Arthur

Trying to do this: https://docs.luxonis.com/hardware/platform/depth/manual-calibration
Works on linux, but on windows, I get this:

python3 calibrate.py -s 3.8823 --board OAK-D-PRO -nx 17 -ny 9
<frozen importlib._bootstrap>:491: Warning: Numpy built with MINGW-W64 on Windows 64 bits is experimental, and only available for
testing. You are advised not to use it for production.

CRASHES ARE TO BE EXPECTED - PLEASE REPORT THEM TO NUMPY DEVELOPERS
C:\Users\arthu\AppData\Roaming\Python\Python314\site-packages\numpy\core\getlimits.py:225: RuntimeWarning: invalid value encountered in exp2
  epsneg_f128 = exp2(ld(-113))
C:\Users\arthu\AppData\Roaming\Python\Python314\site-packages\numpy\core\getlimits.py:226: RuntimeWarning: invalid value encountered in exp2
  tiny_f128 = exp2(ld(-16382))
C:\Users\arthu\AppData\Roaming\Python\Python314\site-packages\numpy\core\getlimits.py:240: RuntimeWarning: invalid value encountered in exp2
  eps=exp2(ld(-112)),
C:\Users\arthu\AppData\Roaming\Python\Python314\site-packages\numpy\core\getlimits.py:41: RuntimeWarning: invalid value encountered in nextafter
  self._smallest_subnormal = nextafter(
C:\Users\arthu\AppData\Roaming\Python\Python314\site-packages\numpy\core\getlimits.py:52: RuntimeWarning: invalid value encountered in log10
  self.precision = int(-log10(self.eps))

I was running in a venv because my global interpreter is a dumpsterfire of random packages. I got it to work by explicitly running the python exe from the venv. Maybe it's not your fault, but I usually don't have to do this. Seems like the install script installed packages in the wrong interpreter. Once it runs, the camera feed is EXTREMELY laggy. Like 5+ full seconds of latency. That also happened on my linux pc, but not as bad. Makes it a real pain to take all those sample photos.

SasoTamse

Hi Arthur - As a first step, could you please try creating a new virtual environment using Python 3.12 and run the calibration script from there?

Please let us know whether this resolves the NumPy warnings and whether the camera feed is still experiencing the same high latency.

Thanks,

Sašo

Arthur

venv with 3.12 gives different error:

(.venv) PS C:\repos\depthai> py calibrate.py -s 3.8823 --board OAK-D-PRO -nx 17 -ny 9
ImportError: numpy.core.multiarray failed to import
Traceback (most recent call last):
  File "C:\repos\depthai\calibrate.py", line 16, in <module>
    import cv2
  File "C:\repos\depthai\.venv\Lib\site-packages\cv2\__init__.py", line 8, in <module>
    from .cv2 import *
ImportError: numpy.core.multiarray failed to import

installing packages seems to have worked though:

(.venv) PS C:\repos\depthai> pip list
Package               Version
--------------------- -----------
certifi               2026.7.22
charset-normalizer    2.0.12
contourpy             1.3.3
cycler                0.12.1
depthai               3.8.0
ffmpy3                0.2.4
fonttools             4.63.0
idna                  3.18
kiwisolver            1.5.0
lz4                   4.4.5
matplotlib            3.11.1
mcap                  1.4.0
mcap-ros1-support     0.0.8
numpy                 1.26.4
opencv-contrib-python 4.5.5.62
opencv-python         4.5.5.62
packaging             26.2
pillow                12.3.0
pip                   26.1.2
pyparsing             3.3.2
PyQt5                 5.15.5
PyQt5-Qt5             5.15.2
PyQt5_sip             12.18.0
python-dateutil       2.9.0.post0
pyusb                 1.2.1
Qt.py                 2.0.5
requests              2.26.0
rosbags               0.9.11
ruamel.yaml           0.19.1
scipy                 1.17.1
sentry-sdk            1.14.0
setuptools            65.5.0
six                   1.17.0
types-PySide6         6.10.1.1
urllib3               1.26.20
zstandard             0.25.0

SasoTamse

Arthur

Sorry about that. Please try creating the virtual environment with Python 3.11 instead.