LatentSync vs LipDub

LatentSync is a free, open-source lip-sync method for Linux and self-hosted deployment. It uses audio-conditioned latent diffusion models: Whisper converts mel spectrograms into audio embeddings, which enter a U-Net through cross-attention layers. The project offers a Gradio application and command-line inference, plus checkpoints, training code and a data-processing pipeline. LatentSync 1.6 was trained on 512 × 512 videos to address blurry teeth and lips. Minimum inference memory is listed as 8 GB of VRAM for version 1.5 and 18 GB for version 1.6. More inference steps can improve visual quality but slow generation; increasing guidance scale can improve lip-sync accuracy while introducing distortion or jitter. Training configurations for the U-Net require 20–55 GB of VRAM, depending on configuration. The documented pipeline uses PySceneDetect for scene detection and InsightFace landmarks for face transformation. The repository lists Apache-2.0, while the model card lists openrail++.

LipDub localizes videos by dubbing them into other languages while keeping the person on camera and synchronizing their lips. The workflow covers uploading video, translating and refining a transcript, choosing or cloning a voice, lip syncing, and exporting localized versions. It supports 80+ languages out of the box; user-provided audio can extend use to other languages, dialects, accents, or fictional languages. Listed tools include lip sync, audio dubbing, a translation editor, stock voices, and instant voice cloning. The free Seed plan allows one minute of video at 1080p and adds a watermark. Core costs $29 a month and supports videos up to 10 minutes; Growth allows up to 60 minutes, and Scale up to 120 minutes with 4K output and API access. Enterprise offers unlimited length at custom pricing. The pricing FAQ says the platform works best with simple productions and broadcast-grade footage where the speaker is clearly visible. Paid plans include unlimited seats and concurrent jobs, while security and support options vary by plan.