> For the documentation index, fetch https://sync.so/docs/llms.txt. Append .md to a page URL for Markdown. Documentation-search MCP: https://sync.so/docs/_mcp/server.

# Use Cases

> Explore how teams use the sync. labs lip sync API for e-learning, marketing, content localization, entertainment, and personalized video at scale.

Sync Labs' lip sync API enables four primary use cases: video dubbing, e-learning localization, personalized video messaging, and content creation. It fits into any workflow where you need to change what someone appears to say in a video -- whether that means translating into a new language, personalizing a message, or creating entirely new dialogue. Here are the most common applications.

#### E-Learning & Training

**Localize training content for global teams.**

Record an instructor once. Then generate versions in every language your team needs -- with lip movements that match the translated audio. Employees get training in their native language without hiring voice actors for each locale or re-shooting video.

Sync Labs' lipsync models work with any language audio, so you can scale from one language to dozens without changing your pipeline.

[Build a translation pipeline ->](/tutorials/video-translation-api-guide)

#### Marketing & Personalized Outreach

**Create personalized video messages at scale.**

Record a single sales video. Use text-to-speech to generate a custom greeting for each prospect -- "Hi Sarah, I noticed your team at Acme is..." -- and lip sync it onto the original recording. One take becomes thousands of personalized videos.

This works for sales outreach, onboarding sequences, customer success check-ins, and event invitations.

[See the personalized video guide ->](/tutorials/personalized-video-messaging)

#### Content Localization & Dubbing

**Dub content for global audiences.**

Traditional dubbing produces mismatched lip movements that break immersion. With Sync Labs, the dubbed video shows lip movements that match the translated audio. Viewers in every language get the same natural viewing experience.

Use the built-in ElevenLabs integration to handle TTS and lipsync in a single API call, or bring your own translated audio.

[Build a dubbing pipeline ->](/tutorials/video-dubbing-api-guide)

#### Entertainment & Media

**Studio grade post-production dubbing.**

Sync Labs films and TV shows with natural-looking lip movements in any target language. sync-3 is the most advanced lipsync model to date with built-in intelligence to handle even the toughest studio edge cases. Side angles, low light, rapid movement and so much more, all handled by sync-3 out of the box. You can even edit dialogue in post without ADR sessions.

sync-3 builds a wide spatial context to not just lipsync the scene, but to understand it.

[Explore sync-3 ->](/models/sync-3)

#### Gaming & Animation

**Lip sync for game characters and animated content.**

Generate lip-synced dialogue for in-game characters from text or audio. Localize game cutscenes into multiple languages with matching lip movements. Create animated content where characters speak naturally in any language.

The API handles human-like faces, making it suitable for realistic and semi-realistic character styles.

[Get started with the API ->](/quickstart)

#### Social Media & Creator Tools

**Build lip sync features into creator platforms.**

Power translation features in video editing tools. Let creators dub their content into new languages with a single click. Build TTS-to-video features where users type text and get a talking head video.

The [Batch API](/api-reference/guides/batch-processing) handles high-volume processing for platform-scale workloads.

[See the TTS lip sync guide ->](/tutorials/text-to-speech-lipsync)

## Which model fits each use case?

| Use Case                             | Best Model                      | Key Benefit                                                                                   |
| :----------------------------------- | :------------------------------ | :-------------------------------------------------------------------------------------------- |
| E-learning & training localization   | lipsync-2                       | Fast, cost-efficient lipsync with solid quality across languages                              |
| Personalized video outreach at scale | lipsync-2 or lipsync-1.9.0-beta | General-purpose quality or legacy maximum-speed processing for simple videos                  |
| Content localization & dubbing       | sync-3                          | Most advanced production-quality lipsync for complex scenes, obstructions, and extreme angles |
| Premium film & TV dubbing            | sync-3                          | 4K native output with global shot understanding and stronger performance preservation         |
| Emotional performance editing        | react-1                         | Emotion prompts + facial expressions + head movements (up to 15s)                             |
| Platform-scale creator tools         | lipsync-2 + Batch API           | Cost-efficient processing plus up to 500 generations per batch on Scale+ plans                |

## Which Guide Should You Follow?

| Goal                                                               | Guide                                                                   |
| :----------------------------------------------------------------- | :---------------------------------------------------------------------- |
| Translate a video end-to-end (transcribe, translate, TTS, lipsync) | [Video Translation API Guide](/tutorials/video-translation-api-guide)   |
| Dub a video with pre-made translated audio                         | [Video Dubbing API Guide](/tutorials/video-dubbing-api-guide)           |
| Generate talking head videos from text                             | [Text-to-Speech Lip Sync Guide](/tutorials/text-to-speech-lipsync)      |
| Create personalized videos for outreach                            | [Personalized Video Messaging](/tutorials/personalized-video-messaging) |
| Process hundreds of videos at once                                 | [Batch API](/api-reference/guides/batch-processing)                     |
| Add emotion and expressions to short clips                         | [React Models](/models/react)                                           |

## Frequently Asked Questions

#### Can Sync Labs dub videos into other languages?

Yes. Sync Labs is designed for multilingual video dubbing. Provide a translated audio track in any language and Sync Labs generates lip movements that match the new audio naturally. You can combine Sync Labs with TTS services like ElevenLabs to build end-to-end translation and dubbing pipelines.

#### Which use case is cheapest?

Cost depends on video duration and the model you choose, not the use case. The lipsync-1.9.0-beta model offers the fastest and most affordable processing for simple videos. Use the cost estimation endpoint to check pricing before submitting a generation for any workflow.

#### Can I use Sync Labs for AI avatars?

Sync Labs is optimized for lip syncing real human faces in video, not for generating AI avatars from scratch. You can use Sync Labs to make a recorded person appear to say new dialogue by providing different audio, which is commonly used for personalized video messaging and content creation.

> Explore how teams use the sync. labs lip sync API for e-learning, marketing, content localization, entertainment, and personalized video at scale.