Changes to Transfer motion from a reference video or a named animation preset onto a static sprite image, producing an animated spritesheet that mimics the reference movement. Provide the sprite as image (URL or base64) plus either a video URL or a preset_id together with perspective and direction. Synchronous until September 10, 2026: the call blocks and returns a single sprite result directly (spritesheet URL, plus optional GIF, individual frames, or with-background spritesheet when requested) with no polling step. It returns HTTP 400 if neither a video nor a complete preset_id/perspective/direction triple is supplied, if the named preset, perspective, or direction cannot be resolved, or if the model/duration combination is invalid. Credits are charged only on success, based on the spritesheet's actual produced duration (which may be shorter than requested if the reference video is shorter). Use this when you have an existing motion clip or preset to copy; prefer animateSprite to generate animation purely from a text prompt, and call listAnimationPresets first to get valid preset_id, perspective, and direction values. Pass an optional request_id to tag the result so you can retrieve it later via `GET /assets/sprites/results`. Requires an API key (user scope). Async is the intended integration pattern: pass `async: true` and the call returns 202 with a job id - poll `GET /assets/jobs/{id}` (`getApiJob` in MCP), honouring poll_after_ms or long-polling with wait=30, until status is succeeded, whose result field is exactly the response documented for this operation. Synchronous responses are deprecated: they remain the default until September 10, 2026, after which requests default to async and return 202 with a job id; set `async: false` explicitly to keep synchronous behavior during and after the transition. Synchronous calls run on the same queue: the response carries an X-Ludo-Job-Id header, and a job still running after 15 minutes comes back as 202 with the job instead of an error. Each account may have up to 50 generations queued or running at once via the API; a request beyond that returns 429 (code PENDING_JOBS_LIMIT).

POST /assets/sprite/transfer-motion

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