Seedance 2.0

Seedance 2.0 supports text-to-video, image-to-video, first-and-last-frame generation, multimodal references, video editing, and video extension. Start with the Seedance 2.0 Series Guide for new integrations. Use the Seedance 2.0 Material Library to prepare reusable image, video, and audio inputs.

Supported Models

Model	Supported Resolutions	Recommended Use
seedance2.0	480p, 720p, 1080p, 4k	Full capabilities with quality prioritized.
seedance2.0-fast	480p, 720p	Faster generation.
seedance2.0-mini	480p, 720p	Lightweight and speed-focused tasks.

Endpoint

POST /v1/videos
GET  /v1/videos/{task_id}
GET  /v1/videos/{task_id}/content

The older /v1/videos/generations and /v1/video/generations creation endpoints remain available for compatible clients.

Authentication

Authorization: Bearer sk-***
Content-Type: application/json

Request Parameters

Parameter	Type	Required	Description
model	string	Yes	seedance2.0, seedance2.0-fast, or seedance2.0-mini.
resolution	string	Yes	A resolution supported by the selected model.
prompt	string	Conditional	Video prompt. Use a type=text item for content[] requests.
duration	integer/string	Yes	Output duration from 4 to 15 seconds.
aspect_ratio	string	No	Output aspect ratio; ratio is the compatibility alias.
content	object[]	No	Multimodal text, image, video, and audio inputs with explicit roles.
operation	string	Conditional	reference_to_video, edit_video, or extend_video.
generate_audio	boolean	No	Whether to generate a video with audio.
return_last_frame	boolean	No	Whether to return the generated video's last frame.

Request Example

curl -X POST "https://api.uniall.ai/v1/videos" \
  -H "Authorization: Bearer sk-***" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance2.0",
    "prompt": "A clean commercial product video with slow camera movement, soft reflections, and realistic lighting.",
    "resolution": "720p",
    "duration": 8,
    "aspect_ratio": "16:9",
    "generate_audio": false,
    "seed": 42,
    "watermark": false
  }'

Multi-Reference Example

curl -X POST "https://api.uniall.ai/v1/videos" \
  -H "Authorization: Bearer sk-***" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance2.0-fast",
    "resolution": "720p",
    "duration": 6,
    "aspect_ratio": "9:16",
    "operation": "reference_to_video",
    "content": [
      {
        "type": "text",
        "text": "Create a fast fashion lookbook clip while preserving the product identity."
      },
      {
        "type": "image_url",
        "image_url": {"url": "https://example.com/model.png"},
        "role": "reference_image"
      },
      {
        "type": "image_url",
        "image_url": {"url": "https://example.com/outfit.png"},
        "role": "reference_image"
      }
    ],
    "generate_audio": true
  }'

Task Status And Result

After creation, save id or task_id, then poll GET /v1/videos/{task_id} until the task reaches completed or failed. See Video Generation Overview for the shared polling interval, status fields, error contract, result URL, and authenticated download flow.

Common Errors

• Using an old create task interface for a new integration.
• Sending more than 9 reference images.
• Sending more than 3 reference videos or reference videos whose total duration exceeds 15 seconds.
• Using a duration outside 4 to 15.
• Passing incompatible operation hints together with the new input format.

Related Pages

• Seedance 2.0 Series Guide
• Seedance 2.0 Material Library
• Video Generation Overview