A slider whose range comes from the model. Switching models applies that model’s default.Seedance models offer auto duration. With it on, the slider disappears and the model decides how long the clip should be. The cost estimate then shows a per-second rate rather than a total, because the final charge depends on what the model produces.
If a model supports them, slots appear for a start image and an end image. You can upload a file, pick from your asset library, or take a frame from a history result. A swap button exchanges the two.Filter the video model list by first frame or first and last frame to see only models that support this.
At least one reference video, and edit keywords in the prompt
Extend
Continue an existing clip
At least one reference video, and extend keywords in the prompt
Task mode and prompt wording must agree. Edit mode needs words like edit, add, remove, or replace in the prompt; extend mode needs extend or continue. A generate-mode prompt containing edit keywords will be rejected so it is not misclassified.
Edit and extend mode force the aspect ratio to adaptive and hide the ratio picker. Edit mode also forces MOV output.
Scenario — general, UGC short video, AIGC, short drama, or classic film restoration
Enhancement level — fast, standard, or pro
Resolution — original, 720p, 1080p, 2K, or 4K
Bit depth — 8, 10, or 12-bit
Seedance results also offer HD upscaling directly from the history card, provided the original has a seed. The available resolutions depend on the model and the original resolution.
WJI has no timeline editor in this app, and no way to cancel a running generation. Selective regeneration of part of a clip exists, but only on the Infinite Canvas.
