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🎥 Video Generation

LongCat Multi Avatar

Audio-driven video generation for two people. Creates super-realistic, lip-synchronized videos with natural dynamics. Perfect for conversations and dialogues with dual audio support

Example Output

Inputs

Input Image

Input Image
Image

Audio (Person 1)

Audio (Person 2)

Output

~30-60 seconds

Try LongCat Multi Avatar

Fill in the parameters below and click "Generate" to try this model

Image containing two speakers

Audio file for person 1 (left side)

Audio file for person 2 (right side)

Text prompt to guide video generation

Negative prompt to avoid unwanted elements

Audio combination mode (parallel=simultaneous, sequential=person 1 then 2)

Bounding box for person 1 (JSON format, defaults to left half)

Bounding box for person 2 (JSON format, defaults to right half)

Video resolution (480p=1 unit/sec, 720p=4 units/sec)

Video segments (1st=~5.8s, additional=5s each)

Number of inference steps

Text guidance scale for classifier-free guidance

Audio guidance scale (higher=exaggerated mouth)

Your inputs will be saved and ready after sign in

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About LongCat Multi Avatar

LongCat Multi Avatar is a cutting-edge AI model designed for audio-driven video generation featuring two people. Leveraging advanced deep learning, it transforms a single image containing two speakers and their respective audio files into hyper-realistic videos where both avatars display natural lip synchronization, facial expressions, and dynamic movements. The model supports simultaneous or sequential audio, making it ideal for recreating authentic conversations, interviews, or duet performances. At its core, LongCat Multi Avatar utilizes sophisticated neural rendering to map audio cues to visual mouth movements and expressions, delivering a seamless and highly believable video output. Its dual audio support allows users to assign unique voices to each speaker, ensuring that both participants are accurately represented. The model also provides granular control over video generation through adjustable prompts, negative prompts to exclude undesired elements, and bounding box customization for precise avatar placement. Users can select between standard (480p) and HD (720p) resolutions, control the length of the video by specifying the number of segments, and fine-tune the quality and realism with adjustable inference steps and guidance scales. Whether you want a short conversational clip or a longer, multi-segment dialogue, LongCat Multi Avatar adapts to your needs with ease. This model is especially powerful for content creators, educators, marketers, and AI enthusiasts seeking to generate engaging, dialogue-driven videos without expensive equipment or complex filming processes. It's perfect for virtual interviews, explainer videos, interactive storytelling, social media content, and more. The intuitive interface accepts both file uploads and URLs, making it accessible for users at any technical level. LongCat Multi Avatar’s robust safety checker and negative prompt system help ensure outputs remain high-quality and appropriate for your audience. Its pay-as-you-go credit system provides flexible access, making advanced AI video generation accessible to projects of all sizes. By seamlessly blending image, audio, and AI, LongCat Multi Avatar opens new possibilities for digital storytelling, virtual communication, and creative video production.

✨ Key Features

Generates highly realistic, lip-synced videos of two people from a single image and dual audio inputs.

Supports both parallel (simultaneous speaking) and sequential (one after another) audio modes for flexible conversations.

Customizable prompts and negative prompts allow for guided video generation and exclusion of unwanted elements.

Adjustable video resolution options (480p and 720p) and segment lengths to fit various project requirements.

Bounding box controls enable precise positioning and cropping of each speaker within the frame.

Fine-tuning parameters such as inference steps and guidance scales for optimal quality and motion realism.

Built-in safety checker and robust error handling for reliable and appropriate outputs.

💡 Use Cases

Creating virtual interviews or two-person dialogue videos for podcasts and YouTube channels.

Producing AI-driven explainer or educational videos featuring conversational scenarios.

Generating realistic avatars for marketing campaigns, product demos, or customer service bots.

Powering interactive storytelling or role-play content with dynamic character interactions.

Building demo videos for voice AI, speech synthesis, or multilingual applications.

Developing social media content with engaging, talking avatar duets or conversations.

Enabling remote team presentations or announcements with personalized, animated avatars.

🎯

Best For

Content creators, educators, marketers, and AI enthusiasts seeking realistic two-person video generation from images and audio.

👍 Pros

  • Delivers ultra-realistic, synchronized lip movements and natural facial dynamics.
  • Supports flexible audio arrangements for authentic conversations or duets.
  • Highly customizable with advanced prompt and bounding box controls.
  • Easy to use with simple file uploads or URLs—no technical expertise required.
  • Multiple output resolutions and segment options to fit diverse needs.
  • Integrated safety features help maintain output quality and appropriateness.

⚠️ Considerations

  • Requires high-quality input images for best results.
  • Primarily designed for two-person scenarios; not suited for group conversations.
  • Generation times may vary depending on video length and resolution.
  • Advanced settings may require experimentation for optimal output.

📚 How to Use LongCat Multi Avatar

1

Upload or provide a URL for an image containing two speakers.

2

Upload or link audio files for each person (left and right), or use the default examples.

3

Optionally, enter a prompt to guide the video’s expressions and movements, and a negative prompt to exclude unwanted elements.

4

Select the audio mode (parallel or sequential), desired video resolution, and the number of segments.

5

Adjust advanced settings such as inference steps, guidance scales, and bounding boxes as needed.

6

Submit your inputs and wait for the model to generate and deliver your lip-synced, conversational video.

Frequently Asked Questions

🏷️ Related Keywords

audio to video lip sync AI avatar video generation AI video conversation dual speaker video realistic talking avatars dialogue video AI virtual interviews AI content creation deep learning video synthesis