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POST
/
v1
/
videos
/
generations
curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "seedance-2.0-reference-to-video",
  "prompt": "Use the first-person perspective framing of video 1 throughout, use audio 1 as background music throughout. First-person perspective fruit tea promotional video...",
  "image_urls": [
    "https://example.com/ref1.jpg",
    "https://example.com/ref2.jpg"
  ],
  "video_urls": [
    "https://example.com/reference.mp4"
  ],
  "audio_urls": [
    "https://example.com/bgm.mp3"
  ],
  "duration": 10,
  "quality": "720p",
  "aspect_ratio": "16:9",
  "generate_audio": true
}
'
{
  "created": 1761313744,
  "id": "task-unified-1774857405-abc123",
  "model": "seedance-2.0-reference-to-video",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 165,
    "video_duration": 8
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 50,
    "user_group": "default"
  }
}

Authorizations

​
Authorization
string
header
required

##All endpoints require Bearer Token authentication##

Get API Key:

Visit the API Key Management Page to obtain your API Key

Add to request header:

Authorization: Bearer YOUR_API_KEY

Body

application/json
​
model
enum<string>
default:seedance-2.0-reference-to-video
required

Video generation model name

Available options:
seedance-2.0-reference-to-video
Example:

"seedance-2.0-reference-to-video"

​
prompt
string
required

Text prompt describing the desired video. Supports both Chinese and English, recommended no more than 500 characters for Chinese

Details:

  • You can use natural language to specify the purpose of each material, e.g., "use image 1 as the first frame", "use the camera movement from video 1 throughout", "use audio 1 as background music"
  • The model will automatically understand the correspondence between material numbers and their intended uses
Example:

"Use the first-person perspective framing of video 1 throughout, use audio 1 as background music throughout. First-person perspective fruit tea promotional video..."

​
image_urls
string<uri>[]

Reference image URL array, 0–9 images

Role description:

Media TypeRoleTypical Usage
Imagereference_imageStyle reference, product image, first/last frame (specified via prompt)

Image requirements:

  • Supported formats: .jpeg, .png, .webp
  • Aspect ratio (width/height): 0.4 ~ 2.5
  • Width/height pixels: 300 ~ 6000 px
  • Max size per image: 30MB
  • Total request body size must not exceed 64MB, do not use Base64 encoding
  • Image URLs must be directly accessible by the server

Note: You cannot provide only audio_urls; at least 1 image (image_urls) or 1 video (video_urls) must be included

Maximum array length: 9
Example:
[
  "https://example.com/ref1.jpg",
  "https://example.com/ref2.jpg"
]
​
video_urls
string<uri>[]

Reference video URL array, 0–3 videos

Role description:

Media TypeRoleTypical Usage
Videoreference_videoCamera movement reference, motion reference, original video for editing/extension

Video requirements:

  • Supported formats: .mp4, .mov
  • Resolution: 480p, 720p
  • Duration per video: 2 ~ 15 seconds, max 3 videos, total duration of all videos ≤ 15 seconds
  • Aspect ratio (width/height): 0.4 ~ 2.5
  • Width/height pixels: 300 ~ 6000 px
  • Frame pixels (width × height): 409,600 ~ 927,408 (e.g., 640×640 ~ 834×1112)
  • Max size per video: 50MB
  • Frame rate: 24 ~ 60 FPS
  • Total request body size must not exceed 64MB, do not use Base64 encoding
  • Using video references will increase costs (input video duration is counted in billing)
  • Video URLs must be directly accessible by the server

Note: You cannot provide only audio_urls; at least 1 image (image_urls) or 1 video (video_urls) must be included

Maximum array length: 3
Example:
["https://example.com/reference.mp4"]
​
audio_urls
string<uri>[]

Reference audio URL array, 0–3 clips

Role description:

Media TypeRoleTypical Usage
Audioreference_audioBackground music, sound effects, voice/dialogue reference

Audio requirements:

  • Supported formats: .wav, .mp3
  • Duration per clip: 2 ~ 15 seconds, max 3 clips, total duration of all audio ≤ 15 seconds
  • Max size per clip: 15MB
  • Total request body size must not exceed 64MB, do not use Base64 encoding
  • Audio URLs must be directly accessible by the server

Note: Audio cannot be provided alone; at least 1 reference video or image must be included

Maximum array length: 3
Example:
["https://example.com/bgm.mp3"]
​
duration
integer
default:5

Output video duration (seconds), defaults to 5 seconds

Details:

  • Supports any integer value between 4–15 seconds
  • Duration directly affects billing
Required range: 4 <= x <= 15
Example:

10

​
quality
enum<string>
default:720p

Video resolution, defaults to 720p

Options:

  • 480p: Lower clarity, lower cost
  • 720p: Standard clarity, this is the default
Available options:
480p,
720p
Example:

"720p"

​
aspect_ratio
enum<string>
default:16:9

Video aspect ratio, defaults to 16:9

Options:

  • 16:9 (landscape), 9:16 (portrait), 1:1 (square), 4:3, 3:4, 21:9 (ultrawide)
  • adaptive: Determined based on prompt intent, priority: video > image > prompt

Pixel values per resolution:

Aspect Ratio480p720p
16:9864×4961280×720
4:3752×5601112×834
1:1640×640960×960
3:4560×752834×1112
9:16496×864720×1280
21:9992×4321470×630
Available options:
16:9,
9:16,
1:1,
4:3,
3:4,
21:9,
adaptive
Example:

"16:9"

​
generate_audio
boolean
default:true

Whether to generate synchronized audio, defaults to true

Options:

  • true: Video includes synchronized audio at no additional charge
  • false: Output silent video
Example:

true

​
callback_url
string<uri>

HTTPS callback URL for task completion

Callback timing:

  • Triggered when the task is completed, failed, or cancelled
  • Sent after billing confirmation is complete

Security restrictions:

  • Only HTTPS protocol is supported
  • Callbacks to private IP addresses are prohibited (127.0.0.1, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.)
  • URL length must not exceed 2048 characters

Callback mechanism:

  • Timeout: 10 seconds
  • Up to 3 retries after failure (at 1/2/4 seconds after failure respectively)
  • Callback response body format is consistent with the task query endpoint response format
  • A 2xx status code is considered successful; other status codes trigger retries
Example:

"https://your-domain.com/webhooks/video-task-completed"

Response

Video generation task created successfully

​
created
integer

Task creation timestamp

Example:

1761313744

​
id
string

Task ID

Example:

"task-unified-1774857405-abc123"

​
model
string

Actual model name used

Example:

"seedance-2.0-reference-to-video"

​
object
enum<string>

Specific type of the task

Available options:
video.generation.task
​
progress
integer

Task progress percentage (0-100)

Required range: 0 <= x <= 100
Example:

0

​
status
enum<string>

Task status

Available options:
pending,
processing,
completed,
failed
Example:

"pending"

​
task_info
object

Video task details

​
type
enum<string>

Output type of the task

Available options:
text,
image,
audio,
video
Example:

"video"

​
usage
object

Usage and billing information