I am starting to get into the world of film making/editing.
I tried to use iMovie, but it just doesn't have the functionality that I need.
Is there a good movie editing software that has a chroma keyer for free?
Cinelerra is a Sophisticated Movie Editor. It is having all most all the features found in Commercially available popular video editors
It is Having Chroma Key.
You can Install Cinelerra with ppa:cinelerra-ppa/ppa repository
In its Resource Window > Video Effects > Chroma Key you can get chroma key.
You need to Drag and Drop this Icon to the Compositor Window.
Then, Chroma key Track will appear in Timeline
There is a small Button in this track. By click in it, You can get the Settings window for Chroma Key.