SeeDance 1.5 Pro API

Image to Video

Professional videos with first & last frame support at 720p/1080p, 5-12 seconds.

·Features·FAQ

Documentation

Prompt

Text description of the desired video

Mode

Aspect Ratio

Only used for text-to-video mode

Duration

Video duration in seconds (5, 10, or 12)

Resolution

Seed

Seed for reproducibility

Output

Your generated video will appear here

Features

What SeeDance 1.5 Pro API offers

Text-to-video and first and last frame modes

Six aspect ratios for text-to-video (including ultra-wide)

720p or 1080p output

5, 10, or 12 second duration selections

Optional seed

REST API with JSON responses

Use cases

Built for

Primary

Premium social: pick 1080p when quality matters more than cost

Interpolation shots: lock endpoints with first and optional last frame

Campaigns: twelve second cuts for longer hero clips than 1.0 Pro

Format tests: compare the same prompt across 720p and 1080p

FAQ

About SeeDance 1.5 Pro API

SeeDance 1.5 Pro generates ByteDance video from text or from first and optional last frame images, with 720p or 1080p output and 5, 10, or 12 second duration choices.

In first and last frame mode you upload a required first frame and may upload an optional last frame image; text-to-video mode instead uses aspect ratio presets.

There is no separate audio generation toggle in the Unifically playground for this model.

1:1, 3:4, 4:3, 9:16, 16:9, and 21:9 in the selector.