Numpy not detected if installed the recommended way.

[etrigan63]

I followed your instructions to install Duetlapse on a clean install of raspiOS Minimal. I installed python3, installed python3-pip and pip installed numpy and compiled mjpg-streamer from source. However, when I launched Deutlapse, it reported that numpy was missing. I checked again and numpy was there. I uninstalled numpy and installed it via apt and it worked. I suggest you update the instructions to reflect this.

[GiulianoM]

Verified steps to correct the issue:

If you installed numpy via python3 pip:

sudo pip3 uninstall numpy

Then:
sudo apt install python3
sudo apt install python3-numpy
sudo apt install fswebcam

You of course can combine the 3 apt installs:

sudo apt install python3 python3-numpy fswebcam

[JohnOCFII]

I can confirm the same issue, and the resolution from @GiulianoM worked correctly for me.