For anyone wondering how I manage to do this, here’s a quick explanation with a small tutorial

First, in Minimax, I use a prompt like this:

“The character remains completely frozen in place, perfectly still like a statue. The camera smoothly orbits 360 degrees around the character in one continuous shot. No character movement, no pose change, no cuts.”

Then I use COLMAP:

Create a new database and import the frames extracted from the Minimax video.

Go to Processing → Feature Extraction.

The important part is to select SIMPLE_PINHOLE as the camera model, then click “Extract”.

Next, go to “Feature Matching” and click “Run”.

After that, go to Reconstruction → Start Reconstruction.

Once the reconstruction is finished, select “Export Model” to export the camera and reconstruction data.

You can then import this data into Gaussian Splatting software such as Postshot or Brush.

And that’s it! You should now have a great Gaussian Splatting model generated from your AI video.

Important UPDATE : I forgot to mention that you need to use the same image for both the start frame and the end frame.