Workaround for: undefined symbol: PyFloat_Type

[kwk]

On Fedora 32 I see this error when opening the script log and the obs-zoom-and-follow script was installed:

[zoom_and_follow_mouse.py] Traceback (most recent call last):
[zoom_and_follow_mouse.py]   File "/home/kkleine/Documents/obs/scripts/obs-zoom-and-follow/zoom_and_follow_mouse.py", line 2, in <module>
[zoom_and_follow_mouse.py]     from pynput.mouse import Controller  # python -m pip install pynput
[zoom_and_follow_mouse.py]   File "/usr/local/lib/python3.8/site-packages/pynput/__init__.py", line 40, in <module>
[zoom_and_follow_mouse.py]     from . import keyboard
[zoom_and_follow_mouse.py]   File "/usr/local/lib/python3.8/site-packages/pynput/keyboard/__init__.py", line 28, in <module>
[zoom_and_follow_mouse.py]     from pynput._util import backend, Events
[zoom_and_follow_mouse.py]   File "/usr/local/lib/python3.8/site-packages/pynput/_util/__init__.py", line 34, in <module>
[zoom_and_follow_mouse.py]     import six
[zoom_and_follow_mouse.py]   File "/usr/lib/python3.8/site-packages/six.py", line 633, in <module>
[zoom_and_follow_mouse.py]     import struct
[zoom_and_follow_mouse.py]   File "/usr/lib64/python3.8/struct.py", line 13, in <module>
[zoom_and_follow_mouse.py]     from _struct import *
[zoom_and_follow_mouse.py] ImportError: /usr/lib64/python3.8/lib-dynload/_struct.cpython-38-x86_64-linux-gnu.so: undefined symbol: PyFloat_Type

It looks like /usr/lib64/python3.8/lib-dynload/_struct.cpython-38-x86_64-linux-gnu.so is missing a symbol that happens to be defined in /usr/lib64/libpython3.so. To overcome the problem above, simply start obs from the command line using:

LD_PRELOAD=/usr/lib64/libpython3.so bin/obs

Let me know if you ran into the same issue and if this tip fixes it for you.

[kwk]

One addition to y proposal is to update the *.desktop file that controls how to start OBS from an applications menu. There you can change the Exec=obs part to Exec=env LD_PRELOAD="/usr/lib64/libpython3.so" obs. My /usr/share/applications/com.obsproject.Studio.desktop file looks like this now:

[Desktop Entry]
Version=1.0
Name=OBS Studio
GenericName=Streaming/Recording Software
GenericName[fr]=Logiciel d'enregistrement/diffusion
Comment=Free and Open Source Streaming/Recording Software
Comment[fr]=Logiciel libre d'enregistrement et de diffusion sur Internet
Comment[ru]=Бесплатная программа с открытым кодом для записи/трансляции видео
Exec=env LD_PRELOAD="/usr/lib64/libpython3.so" obs
Icon=com.obsproject.Studio
Terminal=false
Type=Application
Categories=AudioVideo;Recorder;
StartupNotify=true
StartupWMClass=obs