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Outputs mask overlay, raw mask, and cut-out subject.\n\n## Nodes\n\n- **Load Video** — upload clip. `frame_load_cap` low while testing, `0` for full run.\n- **SAM3 Video Masking** — the engine.\n - `mask_prompt` — what to mask (`person`, `dog`, `red car`). Be specific if multiple candidates.\n - `obj_id` — `0` is the first subject, `1` is the next, this is visualized in the Mask Visualizer. Re-run the workflow with different `obj_id` selected to get each separate mask.\n - `score_threshold` — `0.30` default. Lower if subject is missed or flickering, raise if background bleeds in.\n- **Mask Visualizer** — preview with mask overlaid. Check this first.\n- **Mask Output** — B&W mask video.\n- **Subject** — subject on a black background.\n\n## Run order\n\nUpload → set prompt → test on capped frames → check visualizer → tune threshold → run full.\n\n## Tips\n\n- Specific prompts disambiguate (`woman in yellow dress` > `person`).\n- SAM3 tracks from frame 1 — skip early frames if subject isn't clean there." ] } ], "revision": 0, "version": 0.4 }