~/Seedance 2.0 Fast Video Extend
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Video to Video

Seedance 2.0 Fast Video Extend

Fast video extension and clip stitching at lower cost.

Schema

Hint: You can drag and drop a file or click to upload

Add videos (0/2)

Upload up to 2 videos

Hint: You can drag and drop a file or click to upload

Example

Input

Video

Sample output shown above. The prompt and settings are pre-filled on the left.

Your request will cost $2.00 per run. ($0.20/s) For $10 you can run this model approximately 5 times.

One more thing:

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README

ByteDance / Seedance 2.0 Fast Video Extend — Video to Video (seedance-2.0-fast-video-extend)

Seedance 2.0 Fast video extend is the speed-optimized variant for extending videos or stitching clips at lower cost.

Highlights

  • •Faster Generation – Speed-optimized extension.
  • •Lower Cost – $0.218/s at 720p vs $0.273/s for standard.
  • •Multi-Clip Stitching – Connect up to 3 clips.

Parameters

  • •video_url* – Source video to extend. Formats: mp4, mov.
  • •prompt* – Describe the continuation or transition. Reference clips with [video 1], [video 2] syntax.
  • •reference_video_urls – Additional video clips to stitch (max 2 more).
  • •end_image_url – Optional target end frame.
  • •duration – Total output video duration in seconds.
  • •resolution – Video resolution
    • • 480P
    • • 720P
  • •generate_audio – Generate synchronized AI audio (included in base cost)

Pricing

$2.00 per generation

ResolutionPrice
480P with video input$0.045/s input + output
720P with video input$0.100/s input + output

How to Use

    Related Guides

    Best AI Video APIs ComparedText to Video API GuideBest AI API Platforms 2026AI API Pricing Comparison

    Frequently Asked Questions

    What is the Seedance 2.0 Fast Video Extend API?
    Fast video extension and clip stitching at lower cost.
    How much does Seedance 2.0 Fast Video Extend cost via API?
    Seedance 2.0 Fast Video Extend costs $2.0000 per generation through Renderful's API. No subscription required — pay only for what you use.
    How do I use Seedance 2.0 Fast Video Extend via API?
    Sign up for a free Renderful API key, then send a POST request to the /v1/predictions endpoint with model "seedance-2.0-fast-video-extend". See the documentation at renderful.ai/docs for code examples in Python, JavaScript, and cURL.
    What type of content does Seedance 2.0 Fast Video Extend generate?
    Seedance 2.0 Fast Video Extend is a video to video model by ByteDance. Key features include: Video extension, Multi-clip stitching (up to 3), 480P/720P.
    Is the Seedance 2.0 Fast Video Extend API fast?
    Seedance 2.0 Fast Video Extend has fast generation speed. Results are delivered via polling or webhook callback for seamless integration.