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Audio to Video

Sync React-1

Generate emotionally synchronized videos with lip movements, facial expressions, and head movements using Sync Labs' React-1 model. Best for short-form content (15 seconds or less)

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Inputs

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Execution Steps

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Overview

Sync React-1 combines a source video with an audio track to create an emotionally synchronized video with lip movement, facial expression, and head movement. Use it for short talking-head edits where expressive face and head motion matter, not just mouth sync.

Use cases

  • Turn a short source video and new audio into a more expressive talking-head edit.
  • Test lips-only, face, or head movement synchronization for a voiceover clip.
  • Add an optional emotion cue to guide the generated facial performance.

Input tips

  • Provide public video_url and audio_url values that can be fetched without login.
  • Use short-form source footage; the model is best suited for clips around 15 seconds or less.
  • Choose model_mode: lips for mouth sync, face for expressions, or head for broader movement.
  • Set emotion only when a happy, sad, angry, disgusted, surprised, or neutral cue is useful.
  • Use sync_mode to handle audio and video duration mismatches.
  • Enable active-speaker or occlusion controls when the scene needs them.

Expected output

The AI Tool returns one generated synchronized video file with a downloadable URL, optional content type, file name, file size, and cost metadata. The shared video template renders the result for playback, review, and download.

Caveats

  • Source video and audio URLs must be public and reachable.
  • React-1 is best suited for short-form content around 15 seconds or less.
  • Emotion and model-mode settings guide the result but do not guarantee exact expression or motion.
  • Face visibility, audio timing, video resolution, motion, and occlusions affect the result.
  • This AI Tool does not generate the audio track; provide the audio separately.

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