Best input
Use one visible, front-facing speaker with a clear mouth.
Audio controls length
The output follows the audio, up to 30 seconds.
Avoid poor fits
Crowded scenes, covered mouths, or rapid cuts can reduce alignment quality.
Volcengine video tool
AI Lip Sync Video
Upload a talking-head video and speech audio. AuraTuner uses Volcengine Lite to align visible lip movement and returns an MP4.
Add video and speech audio
Lite mode · 20 credits per output second. The audio sets the output length; longer videos are trimmed and shorter videos may loop.
Lip-sync result
Your MP4 result will appear here and stay available in My Assets.
AI Lip Sync Video FAQ
What files can I use for AI lip sync?
Upload an MP4 or MOV video up to 50MB and a WAV or M4A audio file up to 10MB. Audio can be up to 30 seconds.
How is the output length decided?
The audio sets the output duration. A longer source video is trimmed; a shorter source video may loop to match the audio.
How many credits does lip sync use?
Lip sync uses 20 AuraTuner credits per output second. AuraTuner reads the uploaded audio duration before charging.