ByteDance's flagship multimodal video model with native audio, native 30-second generation, and large multimodal reference sets.
One POST request. Get the result back directly — as an image, video, or JSON depending on the tool.
curl -X POST https://apiai.me/api/workflow/seedance-2.5 \
-H "X-API-Key: YOUR_API_KEY" \
-F "image=@input.jpg" \
-F "aspect_ratio=16:9" \
-F "duration=5" \
-F "generate_audio=true" \
-F "last_frame_image=@image.jpg" \
-F "format=mp4" \
-F "prompt=VALUE" \
-F "reference_audios=@image.jpg" \
-F "reference_images=@image.jpg" \
-F "reference_videos=@image.jpg" \
-F "resolution=720p" \
-F "seed=VALUE" \
-F "watermark=false"
--output result.mp4
Test this tool visually before writing any code. Upload an image, set parameters, and see the result live. When it looks right, copy the auto-generated curl command and paste it into your app.
Process hundreds of images at once without writing a loop. Upload a CSV with one row per item, set your parameters, and download the results as a ZIP when they're done.
| Name | Type | Required | Description | Default / Options |
|---|---|---|---|---|
aspect_ratio |
string | optional | Video aspect ratio. Set to 'adaptive' to let the model choose the best ratio based on inputs. First/last-frame, editing, and extension modes require 'adaptive'. | 16:94:31:13:49:1621:9adaptive
|
duration |
string | optional | Video duration in seconds. Set to -1 for intelligent duration (the model picks the best length). Editing mode requires -1. | 5
|
generate_audio |
string | optional | Generate synchronized audio with the video, including dialogue (use double quotes in prompt), sound effects, and background music. | true
|
last_frame_image |
file | optional | Last-frame image. Requires a first-frame image. Cannot be combined with reference images, videos, or audios. | — |
format |
string | optional | Output video container format. | mp4mov
|
prompt |
string | optional | Text prompt for video generation. Optional when a media input (image, reference images/videos/audios) is supplied. Seedance 2.5 works best with detailed, structured 'production brief' style prompts. | — |
reference_audios |
file | optional | Reference audio files (up to 10, combined duration max 30s) for audio-driven generation and lip-sync. Requires at least one reference image or video. Reference them in your prompt as [Audio1], [Audio2], etc. | — |
reference_images |
file | optional | Reference images (up to 30) for character consistency, style guidance, and scene composition. Cannot be combined with first/last frame images. Reference them in your prompt as [Image1], [Image2], etc. | — |
reference_videos |
file | optional | Reference videos (up to 10, combined duration max 30s) for motion transfer, style reference, editing, and extension. Reference them in your prompt as [Video1], [Video2], etc. | — |
resolution |
string | optional | Video resolution. | 480p720p
|
seed |
string | optional | Random seed. Set for reproducible generation. Reproducibility is not guaranteed. | — |
watermark |
string | optional | Add a watermark to the generated video. | false
|
Get an API key, test Seedance 2.5 in the dashboard, and copy the curl command.