Private asset library for Seedance video: upload once, reference with asset://

Feature update · 2026-10-14

OneFast now supports a private asset library for Seedance video generation.

Upload a reference image, video or audio clip once, wait for it to be processed, then reference it in any video task with an asset://<Id> URL — anywhere an image, video or audio URL is accepted. This is built for consistent virtual characters across many videos: the same character asset can be reused without re-uploading.

• Assets are private to your account.
• asset:// references work on the Volcengine Ark-compatible task endpoint and on POST /v1/video/generate.
• Task receipts, queries and asset listings show the public model name you used.

The library is for fictional or virtual characters only — uploading assets that resemble real people is not allowed. See Private asset library for the upload and reference steps.