推拉补偿变焦

Still-image prompt

Initial-frame preparation only. A still image cannot demonstrate motion, editing or audible timing.

Create only the initial frame; motion is specified separately.
Scene: A hospital thriller: at 4 a.m. in a hospital corridor, a night nurse in her thirties with a tight bun and teal scrubs stands frozen at the nurses' station as she realizes the patient in room twelve is not who he claims to be. The corridor stretches behind her to a pair of swinging double doors 5 m away under pale fluorescent tubes.
Initial state: Camera 2 m from the nurse, 40 mm lens, eye height; her torso centered and the double doors 5 m behind.
Still reference: Full-frame 36 mm wide reference, 16:9 framing; optics 40 mm on the zoom lens at the initial setting; f/5.6; exposure 1/48 s; ISO 800; WB 4600 K
Lighting: Pale 5000 K fluorescent tubes line the ceiling, with one dying tube flickering above the far doors; a warm 3000 K desk lamp at the station keys her face from below. White balance 4600 K. Keep the floor reflections and the wall handrails legible.
Color: Teal scrubs and mint walls against cold white light and a warm lamp on skin; greenish shadows and clean highlights on the waxed floor, tense and clinical.
Do not depict multiple future moments in this one frame.

Production prompt

Complete execution and assembly recipe. Independent sources below must be acquired separately where specified.

PRODUCTION RECIPE: Dolly Zoom / Vertigo / Dolly Zoom
Output: 8 s. Workflow: single_take. Format: Full-frame 36 mm wide reference, 16:9 framing.
Core constraint: Couple camera translation with the opposite focal-length change. Hold the selected subject height within a designed ±5% tolerance while background scale changes relative to it; never fake this with elastic geometry.
Scene: A hospital thriller: at 4 a.m. in a hospital corridor, a night nurse in her thirties with a tight bun and teal scrubs stands frozen at the nurses' station as she realizes the patient in room twelve is not who he claims to be. The corridor stretches behind her to a pair of swinging double doors 5 m away under pale fluorescent tubes.
Initial state: Camera 2 m from the nurse, 40 mm lens, eye height; her torso centered and the double doors 5 m behind.
Action / timeline: During seconds one to seven, retreat from 2 m to 4 m while zooming from 40 to 80 mm roughly in proportion to subject distance, holding the nurse's bounding-box height within ±5 percent of the first held frame. Pull focus with distance. The double doors and corridor walls grow relative to the fixed-size nurse through true perspective, never through warping.
End state: The nurse remains near her starting image height while the distant doors appear larger behind her.
Camera design reference: Full-frame 36 mm wide reference, 16:9 framing; optics 40-80 mm zoom; simultaneous retreat 2→4 m and zoom 40→80 mm; f/5.6; exposure 1/48 s; ISO 800; WB 4600 K; capture 24 fps; playback 24 fps; focus: Follow the eyes from 2 m to 4 m.
Lighting: Pale 5000 K fluorescent tubes line the ceiling, with one dying tube flickering above the far doors; a warm 3000 K desk lamp at the station keys her face from below. White balance 4600 K. Keep the floor reflections and the wall handrails legible.
Color: Teal scrubs and mint walls against cold white light and a warm lamp on skin; greenish shadows and clean highlights on the waxed floor, tense and clinical.
Assembly / finishing: No compositing or speed change. Keep the intended camera geometry in the rendered sequence; a still image alone cannot demonstrate the movement.
Avoid: Uniform scaling of subject and background; Melting structures instead of geometric perspective
Parameters are design references; generated output requires visual and, where applicable, audible verification.

相关技法族

• 水平摇摄

  摄影机机位不动，绕竖直轴改变水平观察方向。

• 垂直摇摄

  机位和支撑高度不动，绕横轴改变俯仰观察方向。

• 推轨与纵深移机

  摄影机实际接近或远离场景，也可沿斜向轨迹移动；透视和遮挡随位置变化。

• 固定机位变焦

  机位不动，通过焦距变化改变画面覆盖范围和放大率。