Seedance 2.5 video generation

Seedance 2.5 supports text-to-video, image-to-video, and image, video, or audio references through asynchronous tasks.

Base URL: https://apimaster.ai/v1 is https://apimaster.ai/v1.

Parameters

Field	Type	Required	Description
model	string	yes	seedance-2.5
prompt	string	yes	Video description
duration	integer	no	4–30 seconds; -1 for automatic duration
resolution	string	no	480p, 720p, or 1080p
aspect_ratio	string	no	16:9, 4:3, 1:1, 3:4, 9:16, 21:9, or adaptive
image_urls / video_urls / audio_urls	string[]	no	Public reference media URLs
image_with_roles	object[]	no	Reference images with role descriptions
generate_audio / audio	boolean	no	Generate or enable audio
watermark	boolean	no	Add a watermark
seed	integer	no	Random seed
output_format	string	no	mp4 or mov
return_last_frame	boolean	no	Return the final frame

Submit a task

curl -s "https://apimaster.ai/v1/videos/generations" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.5",
    "prompt": "A calm ocean horizon at sunrise, static camera, no text",
    "duration": 4,
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": false
  }'

{"code":200,"data":[{"status":"submitted","task_id":"task_xxxxxxxx"}]}

Poll and download

curl -s "https://apimaster.ai/v1/videos/task_xxxxxxxx" -H "Authorization: Bearer YOUR_API_KEY"
curl -L "https://apimaster.ai/v1/videos/task_xxxxxxxx/content" -H "Authorization: Bearer YOUR_API_KEY" -o output.mp4

Statuses include submitted, in_progress, completed, and failed. Download promptly after completion.

Billing

Billing is based on generated duration and output resolution. Reference media is billed under the applicable media rules. Check the current Video/media pricing in the dashboard. Failed tasks are not charged for generation.

Errors

400 invalid parameters, 401 invalid API key, 402 insufficient balance, 429 rate limited, and 500/502 temporary service errors.

See also: Video generation overview · Seedance 2.0.