If you get a missing keys error, it means you are trying to load a checkpoint into a different model architecture. Ensure the Wav2Lip class definition matches the one used in the training script that produced vox-adv-cpk.pth.tar .
Introduced by researchers at Università di Bologna and Snap Inc., FOMM is a framework for animating arbitrary objects (not just faces) using a sparse set of keypoints. For the vox-adv variant, the process is: Vox-adv-cpk.pth.tar