Camera Preview No Longer Showing

Hi erik ,

Sure, after cloning the depth-experiments I installed the requirements for the 'gen2-deeplabv3_depth' example, and ran the main.py script. This worked fine, and I was able to see the camera output, and the segmentation output via a seperate popup window that was created after running the script. I then tried to run the 'gen2-calc-spatials-on-host' example, but before doing that I realised the requirements.txt required a different version of the depthai module so I created a virtual environment to install the dependencies into. This made me notice my pip version was outdated so I updated that aswell using 'python3 -m pip install --upgrade pip'. After checking my history, I've noticed that I also ran 'python3 -m pip install --upgrade depthai' for some reason.

Since doing that I can no longer run the 'gen2-deeplabv3_depth' example, and the 'gen2-calc-spatials-on-host' doesn't work either. By not working, I mean that I can hear the camera click when I run the script which implies it can reach the camera, but no popup window with the camera feed is appearing, despite the terminal output being as expected:
'Use WASD keys to move ROI.
Use 'r' and 'f' to change ROI size.'
for 'gen2-calc-spatials-on-host'.

The strange thing is that I haven't modified the example code and my own basic code extracting the RGB and depth data from the camera is running fine.