This plugin will compare the current frame of a source with a images loaded from disk and executes a program, if one of the images matches.
The initial intension was to use it for auto splitting of speedruns regardless if you play a game that is game captured, an emulator that is window captured or even play on console that is captured using a video device sources. But it can certainly used for other purposes too.
To build the plugin you have to integrate it into the build of OBS
Studio. Check out the repository into a subdirectory of the plugins
folder in the OBS Studio source and add it to the CMakeLists.txt.