拍摄前把脚本拆成镜头清单、演员调度、场地和设备依赖。每个镜头标记“必须有”和“有则更好”，现场遇到时间或天气变化时可以优先保住叙事主干。 Break the script into shots, blocking, location, and equipment dependencies before production. Mark each shot as essential or nice-to-have so schedule and weather changes do not destroy the story spine.