Sometimes you will need to get a camera track on a 2d shot to add 3d elements to it. C4D has a user-friendly tracker that provides a camera for other programs, such as Houdini. Here are the steps for that workflow

1. Export the original 2d video as a jpeg sequence from AE
2. In AE create a C4D maxon layer
   1. this will prompt you to save a c4d file somewhere
3. Open up that C4D file and change the project settings to match the AE sequence (ex: 24fps)
4. Create a motion tracker object in C4D
5. Add jpeg sequence to motion tracker
6. Run the 2d track
   1. If the 2d track isn’t working, delete some of the tracking points that are causing issues
7. Run the 3d camera track
8. Drop a null/cube/figure object to help identify scale and where the camera is when exported
   1. This also confirms if the camera track is moving correctly
9. Export as an FBX into any other DCC