What is MeiGen AI

MeiGen AI is an advanced research team focused on next-generation AI video generation and speech animation, combining text, audio, and visual cues to create lifelike, expressive, and interactive video content. MeiGen AI has successively released MultiTalk and InfiniteTalk, two groundbreaking AI models for audio-driven video generation that push the boundaries of how AI understands and recreates human expressions, motion, and emotion in digital form.

From MultiTalk to InfiniteTalk: A Leap Beyond Limits

MultiTalk made it possible for multiple characters to interact naturally in the same video. Each character could be driven by a separate audio input, maintaining distinct identities and synchronized motion. Its biggest strengths are:

• Interactive Character Control. 

Multiple speaking roles with accurate lip sync and expression.

• Cartoon & Stylized Avatars. 

Generate characters in realistic or animated styles.

• Multi-modal Input Support. 

Combine audio, reference images, and text to design dynamic scenes.

Then came InfiniteTalk, designed for creators who wanted more. InfiniteTalk is a major milestone for long-form storytelling and real-time video production. Its highlights include:

• Full-body Sync

InfiniteTalk uses a sparse-frame video dubbing technique that not only synchronizes lip movements but also aligns head motion, body gestures, and facial expressions with the input audio. It intelligently preserves the key frames of the original video to maintain consistent appearance and background, while re-rendering intermediate frames based on the rhythm and emotion of the speech. The output video is lifelike, smooth, and emotionally rich.

• Infinite Duration

InfiniteTalk can seamlessly extend conversations or monologues without time constraints while maintaining precise lip-sync and consistent character identity throughout the entire sequence.

• Enhanced Stability

InfiniteTalk delivers more consistent and stable motion, minimizing distortions in hand movements, body gestures, and overall posture, ensuring natural and realistic full-body animation.

Now, MeiGen AI offers InfiniteTalk Multi, you can generate multi-person dialogue videos with long audio input, bringing podcasts, debates, and interviews to life with natural expressions and continuous flow.

How to Use InfiniteTalk Multi

1. Upload Images

Provide high-quality portrait images as character references to ensure multiple characters remain consistent throughout the video.

2. Add Audio

Upload two separate audio files (supports MP3, WAV, M4A, OGG, FLAC) for dialogue or background sound.

3. Text Control

Enter text prompts to describe character actions, environmental details, and other video nuances for fine-grained control.

4. Select Interaction

Choose the interaction sequence based on the uploaded audio. Characters can speak simultaneously or follow a fixed order.

5. Generate & Share

Click Generate. InfiniteTalk Multi will automatically analyze your references and produce synchronized, natural, and lifelike audio-video output ready to share.

Applications of MeiGen AI InfiniteTalk

🔊Brand Promotion

Bring mascots or ambassadors to life for social campaigns. 

📚Education & Training

Create lifelike instructors for e-learning or training sessions.

✨ Personalized Storytelling

Use custom images, videos, and audio to produce unique AI-generated narratives. 

💬Podcast & Dialogue Creation

With InfiniteTalk Multi, craft entire talk shows or animated panel discussions with ease.

For truly immersive and lifelike audio-visual storytelling, InfiniteTalk 🔗brings every expression and motion to life. For multi-person interactive videos, InfiniteTalk Multi 🔗delivers a natural, seamless experience.

Start creating your own dynamic, audio-driven AI videos today!

Reference：https://arxiv.org/abs/2508.14033