Is there a way to create a real-time or live "edge to spline" object?
You can see an equivalent of what I am after here in Maya:
Spline generator objects are ObjectData plugins implementing GetContour().
I guess it could be possible to make that function read the properties of a child object. But there is no spline generator in Cinema that does that, so I don't know if that will work.
Another idea would be a Python Tag that continuously accesses your mesh, performs MCOMMAND_EDGE_TO_SPLINE and writes the result into an existing Spline object.
https://www.youtube.com/watch?v=A0k9XFRGp-Q&t=674s its free and open source :)
@PluginStudent and @m_adam
The plugin from @noseman works.
It works for now in my use case, but correct me if I'm wrong it cannot have a priority parameter because it is a generator (?).