obs-shaderfilter is not available for Ubuntu. The only option -for now- is to compile OBS-studio with obs-shaderfilter plugin on your computer. While I'm at it, I also include what is required to run a loopback camera.
The principal steps:
install git on your computer.
Download obs-shaderfilter source code repository.
Download OBS-Studio source code (Recursive) and additional modules.
Install all dependency packages on your computer.
Copy obs-shaderfilter folder into OBS-Studio repo.
Modify OBS-Studio configuration to include obs-shaderfilter.
copy obs-shaderfilter folder into obs-studio repo. cp -R ./obs-shaderfilter ./obs-studio/plugins/obs-shaderfilter
modify OBS-Studio configuration to include obs-shaderfilter. echo "add_subdirectory(obs-shaderfilter)" >> ./obs-studio/plugins/CMakeLists.txt
build and install OBS-Studio.
cd obs-studio
mkdir build && cd build
cmake -DUNIX_STRUCTURE=1 -DENABLE_PIPEWIRE=OFF -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_BROWSER=ON -DCEF_ROOT_DIR="../../cef_binary_4638_linux64" ..
make -j$(nproc)
sudo make install