CHAMELAION LipSync API vs SadTalker

CHAMELAION LipSync API takes video and audio input and produces a video with lip movements matched to the audio. It accepts MP4 video and WAV or MP3 audio by public URL or direct upload. Active-speaker detection runs automatically but can be disabled for an individual request. The maker says the model retains speaker identity, speaking style, and expressions while adapting mouth movements to new audio. Listed uses include dubbing and translation, AI avatars, creative ads, and dialogue replacement or personalization. SDKs are listed for Python 3.8+ and TypeScript/Node.js 18+. Requests require a Bearer token or x-api-key header, except at the health endpoint; generation endpoints are limited to 60 requests per minute, and concurrent job limits depend on the plan. Starter is free and includes 24,000 tokens and two minutes of translation and lip sync, with a watermark. Basic costs €4.00 per year and lists 60,000 tokens and five minutes. The maker says its servers are in Europe and users retain ownership of generated videos. Profile views may work when the mouth remains visible; extreme close-ups, side views above 90 degrees, and cropped mouths are difficult cases.

SadTalker creates a talking-head video from a portrait image and speech audio. It derives 3D head-pose and facial-expression coefficients from the audio to animate the face. The project describes still, reference, and resize modes, along with full-image animation. Command-line examples include GFPGAN enhancement. You can use a local Gradio demo or command-line inference, with setup paths for Linux, Windows, and macOS; Hugging Face and Colab demos are also linked. The documented Linux setup includes Python 3.8, PyTorch, FFmpeg, and the repository requirements. Windows setup also calls for Python, Git, FFmpeg, and model files. Pre-trained models are linked from Google Drive, GitHub Releases, and Baidu. The project says its open-source code runs offline and collects no personal information or other data. SadTalker is free at free under Apache 2.0, except for listed third-party components. Output is 720p or lower and has no watermark. Integrations include Discord and a Stable Diffusion WebUI extension.