Seedance 2.0 Fast integration
Seedance 2.0 Fast is the speed-optimized variant of the Seedance 2.0 family, generating videos from text or images at 480p and 720p for quick-turnaround creative workflows.
prompt is always required; supplying a first-frame image (and optionally a last-frame image_end) switches the model into image-to-video or first-to-last-frame transition mode.
Resolution is selected at generation time: there is a dedicated 480p and 720p generate endpoint. Task listing and status use a single generic endpoint regardless of the resolution used to create the task.
Key capabilities
- Text-to-video and image-to-video: Generate from a text prompt alone, or guide generation with a first-frame
imageand optional last-frameimage_end - First-to-last-frame transitions: Provide both
imageandimage_endto generate a video that transitions between the two frames - Resolution by generate endpoint: Dedicated
480pand720pgenerate endpoints; resolution is not a body parameter - Unified task tracking: One generic list endpoint and one generic status endpoint cover tasks of any resolution
- Durations:
5or10seconds (default5) - Seven aspect ratios: From ultra-wide
film_horizontal_21_9to ultra-tallfilm_vertical_9_21, defaultwidescreen_16_9 - Camera control: Set
camera_fixedtotruefor a static tripod shot orfalsefor natural camera movement - Reproducible output: Provide a
seed(0 to 4294967295) to repeat results;-1selects a random seed - Safety filtering: Content safety checker is enabled by default via
enable_safety_checker - Async processing: Webhook notifications or polling for task completion
- 24-hour delivery: Generated MP4 video is returned via a URL valid for 24 hours
Use cases
- Fast iteration: Generate videos quickly when turnaround speed matters more than maximum fidelity
- Social media content: Produce vertical
social_story_9_16clips for TikTok, Instagram Reels, and YouTube Shorts - High-volume generation: Batch-generate many videos for testing, previews, and A/B variations
- Product animation: Animate a product image, or transition between two product shots with first and last frame control
- Ad variations: Generate multiple aspect ratios and durations from a single concept
Generation modes
| Mode | Required input | Optional input | Output behavior |
|---|---|---|---|
| Text-to-Video | prompt | aspect_ratio, duration, seed, camera_fixed | Video generated entirely from the text prompt |
| Image-to-Video | prompt + image | duration, seed, camera_fixed | Video starts from the first-frame image |
| First-to-last frame | prompt + image + image_end | duration, seed, camera_fixed | Video transitions from the first frame to the last frame |
API Operations
Generate a video using the480p or 720p endpoint, then track it with the generic list and status endpoints. Generation returns a task ID for async polling or webhook notification.
POST /v1/ai/video/seedance-2-fast-480p
Generate a 480p video from text or image
POST /v1/ai/video/seedance-2-fast-720p
Generate a 720p video from text or image
GET /v1/ai/video/seedance-2-fast
List all Seedance 2.0 Fast tasks (any resolution)
GET /v1/ai/video/seedance-2-fast/{task-id}
Get task status and result by ID
Endpoint structure
| Operation | Endpoint |
|---|---|
| Generate 480p | POST /v1/ai/video/seedance-2-fast-480p |
| Generate 720p | POST /v1/ai/video/seedance-2-fast-720p |
| List tasks | GET /v1/ai/video/seedance-2-fast |
| Get task | GET /v1/ai/video/seedance-2-fast/{task-id} |
Parameters
Resolution is determined by the generate endpoint you call (-480p or -720p) and is not a body parameter. The request body is identical for both endpoints.
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
prompt | string | Yes | - | Text description of the video, including scene, motion, visual style, and camera movements. Up to 2000 characters |
image | string | No | - | First-frame image for image-to-video, as a public URL or Base64 string. When provided, the video starts from this image |
image_end | string | No | - | Last-frame image, as a public URL or Base64 string. When provided together with image, the video transitions from the first frame to this frame |
duration | integer | No | 5 | Video length in seconds: 5 or 10 |
aspect_ratio | string | No | widescreen_16_9 | Output ratio: film_horizontal_21_9, widescreen_16_9, classic_4_3, square_1_1, traditional_3_4, social_story_9_16, film_vertical_9_21 |
camera_fixed | boolean | No | false | When true, the camera stays fixed (tripod shot); when false, natural camera movement may be applied |
seed | integer | No | -1 | Random seed for reproducible results (0 to 4294967295). Use -1 for a random seed |
enable_safety_checker | boolean | No | true | Enables content safety filtering on the generated video |
webhook_url | string | No | - | URL for async status notifications when the task completes |
Frequently Asked Questions
What is Seedance 2.0 Fast and how does it work?
What is Seedance 2.0 Fast and how does it work?
Seedance 2.0 Fast is the speed-optimized variant of the Seedance 2.0 family. You submit a text
prompt (and optionally a first-frame image and last-frame image_end) to a resolution-specific generate endpoint and receive a task ID immediately. Poll the generic GET status endpoint or supply a webhook_url to be notified when the task completes, then download the MP4 video from the returned URL (valid for 24 hours).How do I choose 480p or 720p?
How do I choose 480p or 720p?
Resolution is selected by the generate endpoint, not by a body parameter. Call
POST /v1/ai/video/seedance-2-fast-480p for 480p or POST /v1/ai/video/seedance-2-fast-720p for 720p. Task listing and status use the same generic endpoints regardless of resolution.What is the difference between Seedance 2.0 Fast, Pro, and Mini?
What is the difference between Seedance 2.0 Fast, Pro, and Mini?
Seedance 2.0 Fast is the speed-optimized variant and supports 480p and 720p. Seedance 2.0 Pro is the highest-quality variant and supports 480p, 720p, and 1080p. Seedance 2.0 Mini is the most affordable variant and supports 480p and 720p. All three share the same request parameters; choose Fast when turnaround speed is the priority.
Do I need different endpoints to check task status by resolution?
Do I need different endpoints to check task status by resolution?
No. Status and listing are generic:
GET /v1/ai/video/seedance-2-fast lists all tasks and GET /v1/ai/video/seedance-2-fast/{task-id} returns the status of a single task, whether it was generated at 480p or 720p.What is the difference between text-to-video and image-to-video?
What is the difference between text-to-video and image-to-video?
The
prompt field is always required. For text-to-video, send only the prompt and the video is generated entirely from your description. For image-to-video, also send an image to use as the first frame; the video then starts from that image. To generate a transition video, send both image (first frame) and image_end (last frame).What video durations does Seedance 2.0 Fast support?
What video durations does Seedance 2.0 Fast support?
Seedance 2.0 Fast supports
5 or 10 second videos. The default is 5 seconds. Duration is an integer value.What aspect ratios are available?
What aspect ratios are available?
Seven aspect ratios are available:
film_horizontal_21_9 (21:9), widescreen_16_9 (16:9, default), classic_4_3 (4:3), square_1_1 (1:1), traditional_3_4 (3:4), social_story_9_16 (9:16), and film_vertical_9_21 (9:21).What image formats can I use for image-to-video?
What image formats can I use for image-to-video?
Provide
image and image_end either as a publicly accessible URL or as a Base64-encoded string. image sets the first frame; adding image_end produces a first-to-last-frame transition.Can I reproduce the same video?
Can I reproduce the same video?
Yes. Provide a fixed
seed value (from 0 to 4294967295) together with the same prompt and parameters to get consistent results. Use -1 (the default) for a random seed on each request.How long does generation take and how do I get the result?
How long does generation take and how do I get the result?
Seedance 2.0 Fast is optimized for quick turnaround. Poll the GET task endpoint or provide a
webhook_url to be notified on completion. The result MP4 is delivered via a URL that remains valid for 24 hours.What are the rate limits for Seedance 2.0 Fast?
What are the rate limits for Seedance 2.0 Fast?
Rate limits depend on your subscription tier. See the Rate Limits page for current limits by plan.
How much does Seedance 2.0 Fast cost?
How much does Seedance 2.0 Fast cost?
Pricing varies by resolution and duration. See the Pricing page for current rates and credit costs.
Best practices
- Resolution choice: Use the
-480pendpoint for the fastest iterations, and the-720pendpoint when you need more detail - Prompt writing: Be specific about the scene, subjects, motion, camera movement, lighting, and visual style for better results
- Image-to-video: Provide a clear, high-quality first-frame
image; addimage_endonly when you want a transition between two frames - Camera control: Set
camera_fixedtotruefor stable product or talking-head shots, andfalseto let the model add natural motion - Reproducibility: Fix the
seedwhile iterating on a prompt so you can compare changes consistently - Duration selection: Start at
5seconds for fast iterations, then switch to10seconds for final outputs - Production integration: Use webhooks instead of polling for scalable applications
- Result retrieval: Download the output promptly, as the delivery URL is valid for 24 hours
Related APIs
- Seedance 2.0 Pro: Highest-quality Seedance 2.0 variant with 480p, 720p, and 1080p generate endpoints
- Seedance 2.0 Mini: Most affordable Seedance 2.0 variant with 480p and 720p generate endpoints
- Kling 3: Higher-fidelity Kling 3.0 model for premium output