Seedance video editor: edit and extend clips

Try the editor controls

The generator below opens in edit mode on Seedance 2.5, so you can see exactly what an edit asks for: the source clip, your instruction and optional reference images, plus a credit estimate. You can switch to extend or to the other modes at any time. Configuring is free; generating needs a subscription, and edit and extend are part of the Pro plan.

What edit and extend do

Edit

Edit changes part of an existing clip with a written instruction and keeps the rest: swap the weather, restyle a wardrobe, remove an object, change the time of day. Reference images can show what the new element should look like. Say explicitly what must stay the same (framing, motion, lighting), because anything you leave open can drift.

Extend

Extend continues a clip: the model picks up from the end of your shot and follows a new instruction for what happens next, keeping the look and the sound. ByteDance states a Seedance 2.5 clip can be extended up to twice, which is how you build a sequence longer than a single generation.

How to edit a clip on Seedancee

1. 01

   Generate the source clip

   Create the shot on Seedance 2.5 with text, image or reference mode. Edit and extend work on clips from a model that supports them.

2. 02

   Open it from your library

   On the finished generation's result screen, choose Edit or Extend. The workspace opens in that mode with the clip attached as the source.

3. 03

   Write the instruction

   For an edit, name the change and what must stay identical. For an extension, describe the next beat of action and repeat the camera, lighting and sound you want to keep.

4. 04

   Check the estimate and generate

   The credit estimate is shown before you confirm. The result is saved as a new generation next to the original, which stays unchanged in your library.

Instructions that work

Edit the clip: replace the rain with light snow, add a faint breath cloud from the subject, and keep the framing, motion, lighting and colour otherwise identical.

Continue the shot: the woman in the yellow raincoat steps under the awning, shakes water from her sleeve, and looks up at the string of lanterns as they sway. Camera holds, slight push-in. Keep the same lighting and rain intensity. Sound continues: rain, market ambience.

Which models can edit and extend

Edit and extend depend on the model. Today they are exposed for Seedance 2.5 only; the table below is generated from the live model registry, so it changes as soon as the provider adds or removes the capability.

Cost

Every edit or extension is a new generation, quoted like any other from the model's per-second rate at the output duration and resolution you choose. The exact reservation is shown before you confirm, and if the provider fails the job the reserved credits are released automatically. Edit and extend need the Pro plan, which also includes Seedance 2.5; Starter does not include them.

Current limits

• Output follows the model: 4–30s per generation at 480p, 720p, 1080p on Seedance 2.5.
• ByteDance states a clip can be extended up to twice; for longer sequences, chain shots by using the returned last frame as the next first frame.
• There is no timeline, trimming, captions or multi-clip assembly on Seedancee. Download the result and finish it in your editor.
• Edits are generative: the model re-renders the shot, so small details outside your instruction can change. Iterate with one change at a time.