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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-text-to-video",
  "prompt": "A cat playing the Moonlight Sonata on a piano, cinematic lighting, close-up shot",
  "duration": 8,
  "quality": "720p",
  "aspect_ratio": "16:9",
  "generate_audio": true,
  "content_filter": true
}
'
{
  "created": 1761313744,
  "id": "task-unified-1774857405-abc123",
  "model": "seedance-2.0-text-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>
required

Video generation model name

Model IDModeVersion
seedance-2.0-text-to-videoText-to-VideoStandard
seedance-2.0-image-to-videoImage-to-VideoStandard
seedance-2.0-reference-to-videoMultimodal ReferenceStandard
seedance-2.0-fast-text-to-videoText-to-VideoFast
seedance-2.0-fast-image-to-videoImage-to-VideoFast
seedance-2.0-fast-reference-to-videoMultimodal ReferenceFast
seedance-2.0-mini-text-to-videoText-to-VideoMini
seedance-2.0-mini-image-to-videoImage-to-VideoMini
seedance-2.0-mini-reference-to-videoMultimodal ReferenceMini
Available options:
seedance-2.0-text-to-video,
seedance-2.0-image-to-video,
seedance-2.0-reference-to-video,
seedance-2.0-fast-text-to-video,
seedance-2.0-fast-image-to-video,
seedance-2.0-fast-reference-to-video,
seedance-2.0-mini-text-to-video,
seedance-2.0-mini-image-to-video,
seedance-2.0-mini-reference-to-video
Example:

"seedance-2.0-text-to-video"

​
prompt
string
required

Text prompt describing the desired video. Supports both Chinese and English, recommended no more than 500 characters for Chinese or 1000 words for English. Maximum prompt length: 10000 tokens

Prompt usage for different models:

  • Text-to-Video: Pure text description, does not support using image_urls, video_urls, audio_urls in the prompt
  • Image-to-Video: Pure text description, does not support using video_urls, audio_urls in the prompt
  • Reference-to-Video: 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"
Example:

"A cat playing the Moonlight Sonata on a piano, cinematic lighting, close-up shot"

​
image_urls
string<uri>[]

Image URL array

Applicable models and quantity limits:

  • Text-to-Video: Not supported
  • Image-to-Video: Required, 1-2 images
  • Reference-to-Video: Optional, 0-9 images

Image-to-Video image behavior:

Image CountBehaviorRole
1First frame image-to-videoAutomatically set as first_frame
2First and last frame image-to-video1st image -> first_frame, 2nd image -> last_frame

Reference-to-Video image roles:

  • Style reference, product image, character appearance, 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
  • When providing first and last frames, both images can be identical. If aspect ratios differ, the first frame takes priority and the last frame will be automatically cropped to match
  • Image URLs must be directly accessible by the server
Maximum array length: 9
Example:
["https://example.com/image1.jpg"]
​
video_urls
string<uri>[]

Reference video URL array

Only applicable to Reference-to-Video models, other models do not support this parameter

Quantity limit: 0-3 videos

Role description:

  • Camera movement reference, motion reference, original video for editing/extension

Video requirements:

  • Supported formats: .mp4, .mov
  • Resolution: 480p, 720p, 1080p
  • 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 x height): 409,600 ~ 2,086,876 (e.g., 640x640 ~ 2206x946)
  • Max size per video: 50MB
  • Frame rate: 24 ~ 60 FPS
  • 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

Only applicable to Reference-to-Video models, other models do not support this parameter

Quantity limit: 0-3 clips

Role description:

  • Background 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
  • Audio URLs must be directly accessible by the server

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

  • Supports any integer value between 4-15 seconds
  • Duration directly affects billing
  • Applicable to all 9 models
Required range: 4 <= x <= 15
Example:

8

​
quality
enum<string>
default:720p

Video resolution, defaults to 720p

Options:

  • 480p: Lower clarity, lower cost
  • 720p: Standard clarity, this is the default
  • 1080p: Ultra HD clarity, only supported by standard models (Text-to-Video, Image-to-Video, Reference-to-Video); the 3 Fast models and 3 Mini models are not supported

480p and 720p apply to all 9 models

Available options:
480p,
720p,
1080p
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: Automatically select the best ratio

adaptive behavior per model:

  • Text-to-Video: Automatically selected based on prompt content
  • Image-to-Video: Automatically adapts based on first frame image aspect ratio
  • Reference-to-Video: Priority: video material ratio > image material ratio > prompt inference

Pixel values per resolution:

Aspect Ratio480p720p1080p
16:9864×4961280×7201920×1080
4:3752×5601112×8341664×1248
1:1640×640960×9601440×1440
3:4560×752834×11121248×1664
9:16496×864720×12801080×1920
21:9992×4321470×6302206×946

1080p only supported by standard models

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

  • true: Video includes synchronized audio (voice, sound effects, background music) at no additional charge
  • false: Output silent video

Applicable to all 9 models

Example:

true

​
content_filter
boolean
default:true

Content filter, enabled by default true

Options:

  • true: Standard content safety check, this is the default
  • false: Relaxes content restrictions, billed at +10% (1.1x). Illegal and prohibited content is always enforced regardless of this setting
Example:

true

​
model_params
object

Model extension parameters

Only applicable to Text-to-Video models (standard and fast versions)

​
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

Applicable to all 9 models

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-text-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