Mischief 1

What happens in the video. Long, specific prompts steer WAN best.

http(s) URL of the condition image the video starts from, at most 25 MiB and 100 megapixels. A JPEG or PNG within the endpoint's byte budget (2.5 MB by default) renders as sent; anything larger, and any other format, is re-encoded to fit (a JPEG stays JPEG, anything else becomes lossless PNG), scaled down only as far as needed and never below the requested resolution; where that resolution stops the shrink, it is sent as a JPEG of slightly lower quality instead.

Clip length in seconds: 3 or 5. Rendered at 16 fps on the model's 4N+1 frame grid, so the clip runs slightly longer than asked: 3 s -> 49 frames (3.0625 s), 5 s -> 81 frames (5.0625 s). Billing follows the requested seconds, not the slightly longer rendered clip.