If you have zero budget, download and the Rhubarb Live importer. You will have functional, convincing lip sync in under 5 minutes.
This is the fastest "no-plugin" method for a simple jaw-bounce effect. auto lip sync blender
Leo’s hands went cold. He opened the add-on’s Python script. Buried in a subroutine labeled inference_loop was a comment in a language he didn’t recognize—not Python, not C++. It looked like musical notation. He ran a decompiler. The code resolved into a neural net trained not on human speech, but on mouth movements from deleted scenes . Lost frames. Cels that had been recycled, bones that had been erased. MouthGod had been fed the discarded phonemes of every animated character who never got to speak. If you have zero budget, download and the
Works with 3D shape keys and 2D sprite-based mouths. Leo’s hands went cold