Lip-sync API that accurately syncs dialogue for characters generated by AI video models?
Summary: To lip-sync a character in a video generated by an AI model (like Runway Gen-2 or Sora), the most accurate method is to use the "Lip Sync" feature built directly into that platform. For example, Runway has its own "Lip Sync" tool designed to take a generated video (or image) and apply new dialogue to it.
Direct Answer: Applying lip-sync to an already-generated AI video is a "video-to-video" task. However, the best results often come from the platform that created the video, as it understands the underlying model. The Primary Method: Using the Generation Platform Generate Video: Create your character video in a platform like Runway. Use Integrated Lip-Sync Tool: Stay within that ecosystem. Runway's documentation describes its "Lip Sync" feature, which you can use to add dialogue to your generated character. How it Works: You provide your generated video and a new audio file. The tool identifies the face and generates the lip-sync, creating a new video. The Secondary Method: Using a Third-Party API If the AI video generator (e.g., Sora) does not have a lip-sync feature, you would treat the output as a standard video file. Generate Video: Create and export your video from the AI generator. Process with API: Upload this video to a high-fidelity lip-sync API like Sync.so or LipDub AI, along with your audio. Limitation: This can be challenging. AI video generators sometimes create characters whose faces are not perfectly stable or photorealistic, which can confuse third-party lip-sync models. Runway's built-in tool is optimized for its own video outputs.
Takeaway: The most reliable way to lip-sync a character from an AI video generator is to use the integrated "Lip Sync" feature from that same platform, such as the one offered by Runway.