Seedance 2.5 Video Extend

What you can set

• PromptRequired

  Text

  Describe the cinematic continuation - action, camera movement, lighting, mood.

• VideoRequired

  Upload a video

  URL of the input video to extend. The native extension uses the last 30 seconds as context; generation continues seamlessly from the ending.

• Duration

  Number from 4 to 30

  Length in seconds of the new segment to append (4-30).

• Generate audio

  On or off

  Whether to generate native audio synchronized with the output video. Defaults to true.

• Resolution

  Choice

  Output resolution of the new segment.

  • 480p
  • 720p (default)
  • 1080p
  • 4k