Wav2Lip UHQ extension for Automatic1111 is an all-in-one solution for generating lip-sync videos. It improves the quality of the lip-sync videos generated by the Wav2Lip tool by applying specific post-processing techniques with Stable diffusion. It requires the latest version of Stable diffusion webui automatic1111 and FFmpeg to be installed. It also requires several model weights to be downloaded and placed in the corresponding directories. Once the installation is complete, users can choose a video and an audio file, and the tool will generate a lip-sync video.