Seedance 2.5 Lite Image to Video
Seedance 2.5 Lite Image to Video is the special-price full-capability route that animates a first frame (and optionally a last frame) into video. It supports durations up to 30 seconds and outputs 720p only. This is a full-capability variant: media URLs are submitted to the asset review service before the task is submitted by default (real_person=true); set real_person=false only when the materials are confirmed face-free to pass media URLs through as-is, so plain public URLs always work in requests.
Key Parameters and Limits
Seedance 2.5 Lite Image to Video animates a first frame (and optionally a last frame) into a 4–30 second clip with native audio. It shares the full 2.5 contract with the discount routes and differs only in billing tier and resolution: special-offer billing, 720p-only output.- Image input: First frame via
image_url/image_urls, with an optional last frame — at most 2 images per request. - Image formats: jpeg, png, webp, bmp, tiff, gif, heic, and heif; each image under 30 MB; aspect ratio range (0.4, 2.5); width and height range (300px, 6000px).
- Text prompt: For Chinese, keep it under 500 characters; for English, under 1,000 words.
- Duration: 4–30 seconds per clip (default 4s).
- Resolution: 720p only — 480p, 1080p, 2K and 4K are not supported on this route.
- Aspect ratio:
adaptive(default),16:9,9:16,1:1,4:3,3:4,21:9. - Native audio: generated with the picture and on by default (
generate_audio=true); disable per request if not needed.
Real-person review (real_person)
When a request carries reference materials, the booleanreal_person field controls whether materials are submitted to face review first:
real_person: true(default): materials are submitted to the asset review service first, and the task is created withassetId://{assetId}references; the task waits during review and fails if review rejects the materials.real_person: false: review is skipped and material URLs are passed through to task creation as-is.
false only when the materials are confirmed face-free to save the review round trip; keep the default true for materials containing real people.
Asset library references
Besides publicly accessible URLs, theimage_url / image_urls, video_urls, and audio_url / audio_urls fields also accept asset library references in the form assetId://{assetId}. Asset IDs are shared across the platform: any account may reference a known assetId, regardless of who submitted it — the same sharing semantics as a public URL. Only ACTIVE assets pass validation. Submit and track assets via asset upload and asset detail.Authorizations
Use your APIPod API key as a Bearer token in the Authorization header.
Body
Public APIPod model ID.
"seedance-2.5-lite-i2v"Generation or editing instructions, up to 30000 characters. It is recommended to keep the prompt to no more than 500 Chinese characters or 1,000 English words. Lengthy text will lead to scattered information, and the model may ignore details and only focus on key points, resulting in missing elements in the generated video.
30000First frame image URL; a second URL is used as the last frame constraint. 1 to 2 images are supported.
1 - 2 elementsVideo duration in seconds, from 4 to 30.
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 4 <= x <= 30Generate video resolution.
720p Aspect ratio of the generated video,When the ratio is configured as adaptive, the model will automatically adapt the aspect ratio according to the generation scenario.
adaptive, 16:9, 4:3, 1:1, 3:4, 9:16, 21:9 Controls whether the generated video contains audio synchronized with the visuals.
Whether the reference materials contain real people (human faces). Defaults to true: materials are submitted to the asset review service and replaced with assetId:// references before task creation. Set to false only when the materials are confirmed face-free to skip review and pass material URLs through as-is.