Infinitetalk Fast Video To Video Multi

Infinitetalk Fast Video To Video Multi

Playground

InfiniteTalk fast video-to-video multi converts a video and two audio inputs into multi-character talking or singing videos. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

InfiniteTalk Fast Video-to-Video Multi

InfiniteTalk Fast Video-to-Video Multi is the speed-optimized version of InfiniteTalk, creating lip-synced videos for multiple characters at half the cost. Upload a video with two characters and their audio tracks — the model generates accurate lip synchronization with fast processing, perfect for high-volume content production.

Why Choose This?

• Fastest processing Speed-optimized for quick turnaround on multi-character lip sync projects.

• Half the cost 50% cheaper than the standard version — ideal for high-volume production.

• Multi-character lip sync Synchronizes lip motion precisely with audio for two characters simultaneously.

• Flexible speaking order Choose meanwhile (simultaneous), left_right, or right_left speaking patterns.

• Full-body coherence Captures head movements, facial expressions, and posture changes beyond the lips.

• Long-form support Process videos up to 10 minutes in length.

Parameters

How to Use

1. Upload your video — provide a video clearly showing two people.
2. Upload left audio — add audio file for the left character.
3. Upload right audio — add audio file for the right character.
4. Add mask image (optional) — define which regions should animate.
5. Write prompt (optional) — guide scene, pose, or behavior.
6. Select speaking order — choose meanwhile, left_right, or right_left.
7. Run — submit and download your lip-synced video.

Pricing

Billing Rules

• Rate: $0.015 per second ($0.075 per 5 seconds)
• Minimum charge: 5 seconds ($0.075)
• Maximum duration: 600 seconds (10 minutes)
• Duration calculation:
  • Sequential (left_right / right_left): left_audio + right_audio
  • Simultaneous (meanwhile): max(left_audio, right_audio)

Best Use Cases

• High-Volume Production — Cost-effective lip sync for large content libraries.
• Dialogue Scenes — Create realistic conversations between two characters.
• Social Media Content — Quick turnaround for multi-character videos.
• Podcast Visuals — Add visual elements to two-person podcast recordings.
• Rapid Prototyping — Test concepts before using the standard version.

Pro Tips

• Use Fast version for iteration and testing, standard version for final quality.
• Ensure both characters are clearly visible in the source video.
• Use “meanwhile” for overlapping dialogue or simultaneous speech.
• Use “left_right” or “right_left” for sequential conversation flow.
• Mask only the regions you want to animate — full image masks result in black output.

Notes

• Maximum video length: 10 minutes (600 seconds).
• Processing time: faster than standard version.
• Mask safety: Do not upload the full image as mask — only cover animatable regions.
• Ensure uploaded file URLs are publicly accessible.

Related Models

• InfiniteTalk Video-to-Video Multi — Standard version with 720p support.
• InfiniteTalk Fast Video-to-Video — Fast single-character version.
• InfiniteTalk Fast Multi — Fast multi-character image-to-video.

Reference

• Build your own digital human

# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/infinitetalk-fast/video-to-video-multi" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
    "order": "meanwhile",
    "seed": -1
}'

# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"