Video model guide

Seedance 2.5 video generation with clips up to 30 seconds

Seedance 2.5 creates a clip from a written description or from one starting image, with whole-second lengths from 4 to 30 seconds and three quality tiers.

Controls and specifications

There are two starting points. Text to video builds a shot from your description; image to video animates one uploaded still and keeps its framing as the first frame. Both run in the same workspace with the same length and quality controls.

Length is the practical reason to pick this model. A 30-second ceiling gives a sequence room to play out in one request instead of being stitched together from shorter clips afterwards.

Clip length
4–30 s
Quality tiers
480p · 720p · 1080p
Audio
Sound can be switched on or off
Shape options in text mode
1:1 · 4:3 · 3:4 · 16:9 · 9:16 · 21:9 · Automatic
Prompt limit
20000 characters

Length, quality tier, shape and sound are set before you generate. When a starting image defines the first frame, the output shape follows that image automatically, so the shape selector is not offered in that mode.

What this model is good at

Long single takes

Set any whole number of seconds between 4 and 30, so one continuous action can stay in a single clip.

Description or starting image

Write the shot from scratch, or upload one still to define the first frame and let the model move outward from it.

Sound when you want it

Render silent clips for edits that carry their own audio, or switch sound on so the clip arrives with atmosphere included.

Typical projects

One-take product stories

Describe a camera move around a product and let a single long clip carry the whole sequence.

Scene setting for campaigns

Establish a location with atmosphere and optional sound before cutting to tighter shots made with other models.

Animating a key visual

Bring an existing still to life while keeping its framing, because the output follows the uploaded image.

Limits to know before you start

  • One starting image per task. Multi-image reference input is not selectable for this model on the platform yet.
  • With a starting image the shape follows that image; a specific shape cannot be forced in image mode.
  • Draft preview mode, a last-frame image and automatic length are documented for this model family but are not offered in the workspace yet.
  • Length is requested in whole seconds and the finished file can differ from the request by a fraction of a second.

How to start

1

Open the workspace

Use a button on this page. It opens the right workspace with this model already selected, in the language you are reading now.

2

Describe the result

Write what should happen in the shot or image. Concrete subjects, framing and action give the model more to work with than short labels.

3

Set the controls and confirm

Choose length or quality tier, shape and sound where offered, then read the credit quote for those exact settings before you generate.

What it costs

Generation uses credits from your account balance. Video models are charged per generated second at the quality tier you choose, and image models per image. The exact amount is quoted in the workspace before you confirm, and the pricing page lists the current packages.

See credit packages

Questions about this model

How long can a Seedance 2.5 clip be?

Between 4 and 30 seconds, in whole seconds. You set the exact length in the workspace and the quote updates with it.

Can I use more than one reference image?

No. On this platform the model takes one starting image in image-to-video mode. If you need a multi-image reference workflow, use a model that exposes that mode.

Does it always add sound?

No. Sound is optional for this model, so you can render a silent clip or switch sound on before generating.

Which quality tiers are available?

480p, 720p and 1080p. Higher tiers cost more credits per second; the exact amount for your settings is shown before you confirm.

Why can I not choose a shape with a starting image?

When a still defines the first frame, the output follows that still automatically. Choose a shape in text-to-video mode instead if you need a specific one.