Seedance 1.5 Pro Video API

Quick start

Platform: Wizzx gateway; Authorization: Bearer <your_api_key>.
Submit: POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro → returns task_id.
Poll: POST https://api.wizzx.ai/api/v1/task/status with task_id.
Modes: text-to-video / image-to-video; fixed 24fps; the current HTTP contract accepts 4-12 seconds and explicit 720p.
Key feature: generate_audio - generates video with synchronized audio (voice, sound effects, background music).

Auth

Authorization: Bearer <your_api_key>

Submit job

Endpoint: POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro, Content-Type: application/json

Required

Field	Type	Notes
`prompt`	string	Video description
`type`	string	`text-to-video` or `image-to-video`

Optional

Field	Type	Default	Notes
`image_urls`	[]string	-	Required for `image-to-video`, max 2 images (first frame + last frame)
`duration`	int	5	`4` to `12` seconds; `-1` is temporarily rejected by gateway binding
`resolution`	string	720p	Explicit `720p`; `480p` is temporarily rejected by gateway binding
`aspect_ratio`	string	adaptive	`16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `21:9`, `adaptive`
`seed`	int	-1	RNG seed; -1 for random, range [0, 4294967295]
`watermark`	bool	false	Add watermark
`camera_fixed`	bool	false	Lock camera position
`generate_audio`	bool	true	Generate synchronized audio (voice, sound effects, music)
`return_last_frame`	bool	false	Return the last frame image (useful for consecutive video generation)

Image requirements (image-to-video)

Formats: jpeg/png/webp/bmp/tiff/gif
Aspect ratio: 0.4-2.5
Short side >300px, long side <6000px
Size <30MB
Max 2 images: first image = first frame, second image = last frame

First + Last Frame Support Seedance 1.5 Pro supports first frame + last frame image-to-video generation. Provide 2 images in image_urls to control both the start and end of your video.

Example: Text2Video with Audio

curl -X POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro \
  -H "Authorization: Bearer <api_key>" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A cat playing piano in a cozy living room, gentle jazz music playing",
    "type": "text-to-video",
    "duration": 8,
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  }'

Example: Text2Video without Audio

curl -X POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro \
  -H "Authorization: Bearer <api_key>" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A serene mountain landscape with flowing clouds",
    "type": "text-to-video",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": false
  }'

Example: Image2Video (First + Last Frame)

curl -X POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro \
  -H "Authorization: Bearer <api_key>" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "The character walks forward gracefully and waves at the camera",
    "type": "image-to-video",
    "image_urls": [
      "https://example.com/first_frame.jpg",
      "https://example.com/last_frame.jpg"
    ],
    "duration": 6,
    "resolution": "720p",
    "generate_audio": true
  }'

Success response:

{
  "code": 0,
  "message": "success",
  "data": {
    "task_id": "4bbbc9e0-8de8-4f35-a31e-8596c1a6d18a",
    "model_key": "seedance-1.5-pro",
    "credits_deducted": 300
  },
  "request_id": "d54c66a8-0f0f-439c-bd3a-36f3fd275881"
}

Query status

Endpoint: POST https://api.wizzx.ai/api/v1/task/status

{
  "task_id": "4bbbc9e0-8de8-4f35-a31e-8596c1a6d18a"
}

Response example:

{
  "code": 0,
  "message": "success",
  "data": {
    "task_id": "4bbbc9e0-8de8-4f35-a31e-8596c1a6d18a",
    "status": "SUCCEEDED",
    "result_urls": [
      "https://cdn.example.com/video.mp4"
    ],
    "error": "",
    "credits_deducted": 300
  },
  "request_id": "499347b1-ff99-4ba2-a977-ad655431919d"
}

Client-visible states: PENDING, QUEUED, PROCESSING, REVIEW_REQUIRED, SUCCEEDED, and FAILED.

Pricing

The backend catalog includes a 480p tier, but the current shared gateway binding rejects explicit 480p. Use 720p until the backend contract is fixed.

Seedance 1.5 Pro pricing varies by resolution and audio generation:

Resolution	With Audio (credits/s)	Without Audio (credits/s)
480p	22	11
720p	50	25

Example costs (with audio):

Resolution	5s video	8s video	12s video
480p	110 credits	176 credits	264 credits
720p	250 credits	400 credits	600 credits

Example costs (without audio):

Resolution	5s video	8s video	12s video
480p	55 credits	88 credits	132 credits
720p	125 credits	200 credits	300 credits

Seedance 1.5 Pro vs Seedance Pro Fast

Feature	Seedance 1.5 Pro	Seedance Pro Fast
Audio generation	Yes (default on)	No
First + Last frame	Yes (2 images)	No (1 image only)
Resolutions	Current HTTP contract: 720p	Omit for 480p; explicit 720p/1080p
Duration range	Current HTTP contract: 4-12s	5s or 10s
Auto duration	Intended, but currently blocked by gateway binding	No

FAQ

What’s unique about Seedance 1.5 Pro? Audio generation and first+last frame support for more controlled video creation.
How does generate_audio work? When enabled (default), the model generates synchronized audio including voice, sound effects, and background music based on your prompt.
What’s the difference between 1.5 Pro and Pro Fast? 1.5 Pro adds audio generation and first+last frame control, but doesn’t support 1080p resolution. Pro Fast is silent-only but supports higher resolution.
How to create consecutive videos? Use return_last_frame: true to get the last frame, then use it as the first frame for the next video.
Why no 1080p? Seedance 1.5 Pro currently only supports 480p and 720p resolutions.
Can fps be changed? Fixed at 24fps.

Getting started

Agent integrations

Video Generation

Image Generation

Audio Generation

Seedance 1.5 Pro Video API

Quick start

Auth

Submit job

Required

Optional

Example: Text2Video with Audio

Example: Text2Video without Audio

Example: Image2Video (First + Last Frame)

Query status

Pricing

Seedance 1.5 Pro vs Seedance Pro Fast

FAQ

​Quick start

​Auth

​Submit job

​Required

​Optional

​Example: Text2Video with Audio

​Example: Text2Video without Audio

​Example: Image2Video (First + Last Frame)

​Query status

​Pricing

​Seedance 1.5 Pro vs Seedance Pro Fast

​FAQ

Quick start

Auth

Submit job

Required

Optional

Example: Text2Video with Audio

Example: Text2Video without Audio

Example: Image2Video (First + Last Frame)

Query status

Pricing

Seedance 1.5 Pro vs Seedance Pro Fast

FAQ