The game engine I'm using asks for each frame to be in its own .obj file, how can I convert an arbitraty fbx animation into that. If not possible, how can I create such sequence starting from a single obj file? I'm not yet using any software, just experimenting with downloaded assets
Try this: In Blender(version of testing: 2.93) import the fbx animation file.
Now select, in object mode, only the object you want, and go to menu Object>Animation>bake action.
On the Export dialog check animation.
Here are the obj's imported back to Blender:
I hope this helps you.