How do I add lip sync to AI-generated video?
Quick Answer
Provide a clear audio track or script, select a consistent character reference, and use a lip-sync model that maps phonemes to mouth shapes frame by frame.
Scenario
Marketing teams creating spokesperson videos, testimonial content, or multilingual ad variants with synchronized speech.
Best mode
Recommended workflow
Lip Sync That Looks Natural, Not Uncanny
Produce character-driven video content with believable lip sync for marketing, education, and entertainment applications.
Recommended workflow
Lip Sync That Looks Natural, Not Uncanny
Use the answer to choose the right workflow, then move into the matching tool page before generating inside Create.
AI-generated characters that speak need mouths that move convincingly. Poor lip sync breaks immersion instantly and makes content look amateurish. HappyHorse Lab mode provides precise control over speech-to-motion mapping, producing lip sync that matches audio cadence naturally — for UGC-style content, narrator-driven explainers, and character-based series where believable speech is non-negotiable.
Step-by-Step Guide
- 1
Record or generate the audio narration track with clear pronunciation and natural pacing.
- 2
Select or generate a character reference with a clearly visible face at a consistent angle.
- 3
Run the lip-sync process to map audio phonemes to corresponding mouth movements.
- 4
Review the output for sync accuracy, especially on plosive sounds and sentence endings.
Prompt Template
Generate a spokesperson video with lip sync matching this audio script. Use a front-facing character reference with neutral expression and good lighting.
Common Pitfalls to Avoid
Using audio with background noise or mumbled speech that confuses phoneme detection
Choosing a character reference with an obscured or angled face
Skipping the review step — lip-sync errors are immediately obvious to viewers
Common Questions
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