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POST
/
v1
/
videos
/
generations
doubao-seedance-1.0-pro-fast API
curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "doubao-seedance-1.0-pro-fast",
  "prompt": "A cat playing piano"
}'
{
  "created": 1761313744,
  "id": "task-unified-1761313744-vux2jw0k",
  "model": "doubao-seedance-1.0-pro-fast",
  "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_call",
    "credits_reserved": 8,
    "user_group": "default"
  }
}

Authorizations

​
Authorization
string
header
required

##All APIs require Bearer Token authentication##

Get API Key:

Visit API Key Management Page to get your API Key

Add to request header:

Authorization: Bearer YOUR_API_KEY

Body

application/json
​
model
string
default:doubao-seedance-1.0-pro-fast
required

Video generation model name

Example:

"doubao-seedance-1.0-pro-fast"

​
prompt
string
required

Prompt describing the video you want to generate

Maximum length: 1000
Example:

"A cat playing piano"

​
duration
integer

Specifies the duration of the generated video (in seconds), defaults to 5 seconds

Note:

  • Supports any integer value between 2 and 12 seconds
  • Billing for a single request is based on the duration value; longer durations result in higher costs
Required range: 2 <= x <= 12
​
quality
enum<string>

Video resolution, defaults to 1080p

Note:

  • 720p: Standard definition, standard pricing
  • 1080p: High definition, higher pricing, this is the default value
Available options:
720p,
1080p
Example:

"1080p"

​
aspect_ratio
string

Video aspect ratio

Text-to-video mode:

  • Default value: 16:9
  • Supported values: 16:9 (landscape), 9:16 (portrait), 1:1 (square), 4:3, 3:4, 21:9 (ultra-wide)

Image-to-video mode (when using image_urls):

  • Default value: adaptive
  • Supported values: In addition to the above 6 ratios, also supports keep_ratio (keep original aspect ratio) and adaptive (adaptive)
Example:

"16:9"

​
image_urls
string<uri>[]

Reference image URL list for image-to-video functionality

Note:

  • Number of images supported per request: 1 image
  • Image size: Not exceeding 10MB
  • Supported file formats: .jpg, .jpeg, .png, .webp
  • Image URLs must be directly viewable by the server, or the URL should trigger a direct download when accessed (typically these URLs end with image extensions like .png, .jpg)
Maximum length: 1
Example:
["https://example.com/image.jpg"]
​
callback_url
string<uri>

HTTPS callback URL after task completion

Callback timing:

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

Security restrictions:

  • Only HTTPS protocol is supported
  • Callbacks to internal network 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
  • Maximum of 3 retries after failure (retries occur after 1/2/4 seconds following failure)
  • Callback response body format is consistent with task query API response format
  • Callback URL returning 2xx status code is considered successful; other status codes will 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-1761313744-vux2jw0k"

​
model
string

Actual model name used

Example:

"doubao-seedance-1.0-pro-fast"

​
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 detailed information

​
type
enum<string>

Output type of the task

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

"video"

​
usage
object

Usage and billing information