What is AI lip sync and how does it create talking videos?

AI lip sync converts a static portrait image into a talking head video driven by an audio file. The engine segments your audio into phoneme boundaries (individual speech sounds), maps each phoneme to a viseme (mouth shape), and generates frame-by-frame facial animation — including jaw movement, lip position, and head sway — synchronized to the original audio timing. The output is an MP4 video where the portrait appears to speak naturally.

What lip sync models are available and how do they compare?

Three models at different price-quality tiers: Kling Avatar Standard (720p) for reliable general-purpose lip sync, Kling Avatar Pro (1080p) for production-grade output with sharper facial detail, and Latiai Lip Sync (480p or 720p) with seed reproducibility. All three animate mouth, jaw, head, and upper body — the difference is resolution, rendering fidelity, and seed support.

What portrait image formats work best for lip sync?

JPG, PNG, and WebP up to 10 MB. For best results, use front-facing portraits with visible mouth, chin, and jaw. Even lighting without hard shadows on the lower face improves viseme mapping accuracy. Resolution above 512px is recommended; 1024px+ gives the AI more detail to animate, especially for 1080p output via Kling Avatar Pro.

What audio formats and lengths are supported?

MP3, WAV, AAC, M4A, and OGG files up to 10 MB and 15 seconds maximum. WAV and AAC preserve the most waveform detail for phoneme extraction. Clear speech in a quiet environment produces the most accurate lip sync. Background music or heavy noise degrades phoneme boundary detection.

Which lip sync model should I choose for my project?

Choose based on your output requirements and production stage. For rapid iteration and draft previews, Latiai Lip Sync at 480p provides the fastest and most economical path — test multiple audio takes and script variations before committing to a higher resolution. For social media content and internal communications, Kling Avatar Standard at 720p delivers reliable lip sync with natural head motion suitable for TikTok, Reels, and training videos. For client-facing deliverables, product marketing, and broadcast content, Kling Avatar Pro at 1080p produces the highest fidelity with sharper facial detail. Latiai Lip Sync at 720p adds seed reproducibility — essential when you need identical visual output across script revisions.

What is seed reproducibility in Latiai Lip Sync?

Latiai Lip Sync accepts a seed value between 10,000 and 1,000,000. When you lock a seed, the same portrait-plus-audio-plus-seed combination generates near-identical output every time. Change the audio while keeping the seed and portrait to produce visually consistent videos across script revisions — essential for course content and marketing campaigns that require visual continuity.

How long does lip sync generation take?

Typically 1–5 minutes depending on model, resolution, and audio length. Kling Avatar Standard and Pro generally complete within 2–3 minutes for a 10-second clip. Latiai Lip Sync processes faster at 480p. The frontend polls automatically with a 10-minute timeout, though most generations finish well before that.

Can I use Text to Speech output directly with lip sync?

Yes. Generate dialogue audio with our Text to Speech tool (113 voices, 75 languages, audio tags for emotion), download the MP3 output, then upload it as the audio input for lip sync. This creates a complete text-to-talking-video pipeline: type a script, generate the voice, generate the lip sync video — no microphone needed at any step.

Does AI lip sync work in any language?

Yes. The lip sync engine analyzes audio waveforms rather than text, making it fully language-agnostic. It maps the sounds it hears — vowels, consonants, pauses, emphasis — to mouth shapes regardless of whether the audio is English, Mandarin, Arabic, Hindi, or any other language. Accent and dialect do not affect sync accuracy because the AI works with acoustic data, not linguistic rules.

Can I use lip sync avatars for commercial purposes?

Yes. Videos generated through AI lip sync on a paid plan can be used commercially — marketing campaigns, e-learning platforms, customer support libraries, social media advertising, and client deliverables. Ensure your portrait image and audio do not infringe third-party rights (likeness rights, voice rights, copyright), as the platform does not verify source material licensing.

Model

Avatar image

Click to upload or drag and drop

JPEG, PNG, WebP (max 10MB)

Input Audio

Click to upload or drag and drop

MP3, WAV, AAC, M4A, OGG (max 10MB, up to 15s)

Audio duration must be 15 seconds or less.

Prompt

Translate Prompt

0 / 5000

Resolution

Latiai

Kling

AI Lip Sync Avatar — Turn One Photo and Audio into a Talking Video

A single portrait photograph and a 15-second audio clip are all you need to produce a talking head video. The AI lip sync engine analyzes your audio waveform — extracting phoneme boundaries, pitch contour, and speech rhythm — then generates synchronized mouth movements, jaw motion, and natural head sway frame by frame. Kling Avatar Standard renders at 720p, Kling Avatar Pro at 1080p, and Latiai Lip Sync offers 480p or 720p with seed control for reproducible output. This pay-per-second model means you generate only what you need — no monthly minute caps. Accepts JPG, PNG, or WebP portraits and MP3, WAV, AAC, M4A, or OGG audio — both capped at 10 MB and 15 seconds.

Multi-Model Lip Sync

Audio-Driven Animation

480p to 1080p Output

Seed Reproducibility

Full-Body Lip Sync

Audio Up to 15s

Explore Image to Video

What Is AI Lip Sync Video Generation?

AI lip sync video generation converts a static portrait image into a talking head video driven entirely by an audio file. The process begins with audio analysis: the AI segments your recording into phoneme boundaries — the individual sounds that make up speech — and maps each phoneme to a corresponding mouth shape (viseme). It then generates frame-by-frame jaw movement, lip position, and subtle facial micro-expressions that stay synchronized with the original audio timing. The result looks like the portrait is speaking naturally.

Three models serve different production needs on this platform. Kling Avatar Standard (720p) uses Kuaishou's avatar pipeline for reliable lip sync with natural head motion. Kling Avatar Pro (1080p) produces higher-fidelity output with sharper detail, suitable for production-grade content. Latiai Lip Sync (480p or 720p) adds seed reproducibility — lock a seed value between 10,000 and 1,000,000, and the same portrait-plus-audio combination generates near-identical output every time, which is critical for iterative production workflows.

AI Lip Sync Features

Audio-driven facial animation across three models, from draft previews to production-grade output.

Multi-Model Lip Sync Pipeline

Kling Avatar Standard (720p) handles routine production. Kling Avatar Pro (1080p) delivers higher fidelity for client-facing content. Latiai Lip Sync (480p or 720p) adds seed reproducibility for iterative workflows. Select the model that matches your resolution requirement and budget.

Phoneme-Level Audio Analysis

The lip sync engine segments audio into individual phonemes, maps each to a viseme (mouth shape), and generates frame-by-frame jaw, lip, and facial movement. This audio-driven approach works with any spoken language — the AI reads sound waveforms, not text — so accent, dialect, and language do not affect sync accuracy.

480p to 1080p Resolution Range

480p (Latiai only) is ideal for rapid iteration — test multiple audio takes before committing to higher resolution. 720p suits social media and internal content. 1080p (Kling Pro only) meets broadcast and e-commerce production standards. Cost scales with resolution, so you control budget by choosing the right tier for each stage of production.

Seed-Controlled Reproducibility

Latiai Lip Sync accepts a seed value between 10,000 and 1,000,000. The same portrait, audio, and seed combination produces near-identical output every time. This is essential for iterative production — adjust the prompt or audio while keeping visual consistency, or generate batches with predictable results.

Head and Upper-Body Animation

Beyond mouth movement, the lip sync AI generates natural head tilts, nodding, shoulder sway, and subtle upper-body gestures that match speech rhythm and emphasis. Competitors like HeyGen call this 'Avatar IV' technology — our implementation produces similar natural body language across all three models.

Five Audio Format Support

Upload MP3, WAV, AAC, M4A, or OGG files up to 10 MB and 15 seconds. No format conversion required before upload. WAV and AAC produce the cleanest waveforms for phoneme extraction; compressed formats like MP3 and OGG also work but may slightly reduce sync precision at very low bitrates.

How to Create an AI Lip Sync Video

One portrait image, one audio file, one generation — talking video in minutes.

Upload a Portrait Image

Select a JPG, PNG, or WebP portrait (max 10 MB). Front-facing photos with visible mouth, jaw, and shoulders produce the most accurate lip sync. Avoid sunglasses, masks, or heavy shadows across the lower face — the AI needs clear visibility of the mouth region to map visemes correctly.

Upload Your Audio Clip

Upload MP3, WAV, AAC, M4A, or OGG audio (max 10 MB, max 15 seconds). Clear speech recordings in a quiet environment produce the best phoneme extraction. If you don't have audio yet, use our Text to Speech tool to generate dialogue from text, then feed the output directly into lip sync.

Select Model and Generate

Choose Kling Avatar Standard (720p), Kling Avatar Pro (1080p), or Latiai Lip Sync (480p or 720p). Optionally set a seed value for Latiai Lip Sync to enable reproducible output. Processing typically completes within 1–5 minutes. Download the finished MP4 when ready.

AI Lip Sync Use Cases

Audio-driven video generation for marketing, education, support, and content repurposing.

Virtual Brand Spokesperson

One photo shoot, unlimited script updates

Photograph your spokesperson once, then generate new talking head videos for every product launch, seasonal campaign, or A/B test variant. Update the script without rescheduling talent. A 15-second ad generates in minutes — a fraction of the time and cost of a studio reshoot.

AI Instructor for Course Content

Scale narration without re-recording

Upload an instructor portrait and lesson audio to produce narrated course modules. When curriculum changes, re-record only the audio and regenerate the video — the visual presenter stays consistent. Latiai Lip Sync with seed control ensures identical visual output across module updates, maintaining course continuity.

Camera-Free Video Presence

Post talking-head content without filming

Record a voiceover on your phone, upload it with a portrait, and get a TikTok-ready talking video in under 5 minutes. Latiai Lip Sync at 480p offers the most economical path to talking-head content. No ring light, no makeup, no editing. Pair with our Text to Speech tool to skip recording entirely.

Always-Available Virtual Agent

Put a human face on automated help

Generate lip sync FAQ videos and onboarding walkthroughs that customers can watch 24/7. A library of 20 support videos at 10 seconds each generates faster than recording them manually — and updates require only a new audio file. Update answers by replacing only the audio track.

Same Face, Any Language

Localize video without re-filming

The lip sync AI reads audio waveforms, not text, so it works with any spoken language. Record or synthesize audio in English, Mandarin, Spanish, Arabic, or Hindi, and generate a matching talking head video from the same portrait. The viseme mapping adapts to each language's phoneme set automatically.

Audio-to-Video Repurposing

Turn podcast clips into watchable content

Extract a 15-second highlight from your podcast, pair it with a speaker portrait, and generate a lip sync video clip for YouTube Shorts or Instagram Reels. The AI maps speech rhythm to head movement and facial expression, making audio-only content visually engaging for video-first platforms.

AI Lip Sync Best Practices

Portrait Selection Tips

Front-facing portraits with visible mouth, chin, and jaw produce the most accurate viseme mapping
Even, diffused lighting avoids hard shadows across the lower face that confuse the AI
Avoid sunglasses, masks, scarves, or hands near the mouth — occluded areas reduce sync quality
Resolution above 512px gives the model more facial detail to animate — 1024px+ is ideal for 1080p output

Audio Quality Tips

Record in a quiet environment — background noise degrades phoneme boundary detection
Maintain consistent volume and mic distance to avoid volume spikes that distort lip timing
WAV and AAC formats preserve more waveform detail than highly compressed MP3 or OGG
Natural speaking pace with clear consonants produces the most convincing lip sync — avoid mumbling

AI Lip Sync Technical Specifications

Available Lip Sync Models

Kling Avatar Standard: 720p output, Kuaishou avatar pipeline
Kling Avatar Pro: 1080p output, higher-fidelity rendering
Latiai Lip Sync: 480p or 720p, seed 10,000–1,000,000

Input Requirements

Portrait image: JPG, PNG, or WebP, max 10 MB
Audio file: MP3, WAV, AAC, M4A, or OGG, max 10 MB, max 15 seconds
Optional: text prompt for style guidance
Optional: seed value 10,000–1,000,000 (Latiai Lip Sync only)

Output Specifications

Resolution: 480p, 720p, or 1080p (model dependent)
Duration: matches audio length, up to 15 seconds
Format: MP4 video file
Processing time: typically 1–5 minutes

Related AI Tools

Text to Speech (TTS)

Image to Video Animator

Kling Motion Control

AI Lip Sync FAQ

Answers to common questions about AI lip sync video generation, models, pricing, and audio requirements.

One Photo + One Audio = Talking Video

Upload a portrait and an audio file, select a model from 480p to 1080p, and generate a lip sync video in minutes. Latiai Lip Sync covers 480p–720p with seed reproducibility. Kling Avatar Pro delivers production-grade 1080p output. Pair with Text to Speech for a complete text-to-video pipeline.