~/Seedance 2.5 Video Extend
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Video to Video

Seedance 2.5 Video Extend

Extend videos or stitch clips into coherent sequences.

Schema

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

Add videos (0/2)

Upload up to 2 videos

Run the model to see output

Your request will cost $3.80 per run. ($0.38/s) For $10 you can run this model approximately 2 times.

One more thing:

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README

ByteDance / Seedance 2.5 Video Extend — Video to Video (seedance-2.5-video-extend)

Seedance 2.5 video extend generates continuation footage from an input video, or stitches up to 3 video clips into a coherent sequence up to 30 seconds with smooth transitions.

Highlights

  • •Video Extension – Continue a video forward with natural motion.
  • •Multi-Clip Stitching – Connect up to 3 clips with smooth transitions.
  • •Extended Output – Up to 30 seconds of total output.
  • •Native Audio – Audio generation for the extended segment.

Parameters

  • •video_url* – Source video to extend. Formats: mp4, mov.
  • •prompt* – Describe the continuation or transition. Reference clips with [video 1], [video 2], [video 3] syntax.
  • •reference_video_urls – Additional video clips to stitch (max 2 more, 3 total including main video).
  • •duration – Total output video duration in seconds.
  • •resolution – Video resolution
    • • 480P
    • • 720P
  • •generate_audio – Generate synchronized AI audio (included in base cost)

Pricing

$3.80 per generation

ResolutionPrice
480P with video input$0.085/s input + output
720P with video input$0.190/s input + output

How to Use

  1. 1.Upload the source video to extend.
  2. 2.For extension: Describe what should happen next.
  3. 3.For stitching: Upload additional clips and describe transitions using [video 1], [video 2] syntax.

More Models to Try

•Content Extension: Extend short clips into longer sequences.
•Scene Transitions: Create smooth transitions between different scenes.
•Story Building: Stitch narrative clips into coherent videos.

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 2.5 Video Extend API?
Extend videos or stitch clips into coherent sequences.
How much does Seedance 2.5 Video Extend cost via API?
Seedance 2.5 Video Extend costs $3.8000 per generation through Renderful's API. No subscription required — pay only for what you use.
How do I use Seedance 2.5 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-2.5-video-extend". See the documentation at renderful.ai/docs for code examples in Python, JavaScript, and cURL.
What type of content does Seedance 2.5 Video Extend generate?
Seedance 2.5 Video Extend is a video to video model by ByteDance. Key features include: Video extension, Multi-clip stitching (up to 3), Smooth transitions.
Is the Seedance 2.5 Video Extend API fast?
Seedance 2.5 Video Extend has medium generation speed. Results are delivered via polling or webhook callback for seamless integration.