成片拆解
成片拆解 · 跟做教程

变形广告牌递霜
30 秒写实广告短片,怎么做出来的?

Seedance 2.5 一镜到底:时代广场变形 LED 屏里的模特探身,把面霜递给路人。

套路 · 破壁出屏套路 · 产品广告30 秒 · 6 节拍 · 一镜到底3 张参考图Seedance 2.5真人摄影 · 户外变形广告

钩子在哪

时间为抽帧估计

结构:3D 广告牌表演 → 递出产品 → 接住 → 欢呼

看完成片再对照:这条片子靠什么在几秒内抓住人。点时间可跳到成片对应位置。

开场钩子

雨夜时代广场式街口,转角裸眼 3D 大屏里女人侧躺,像要从屏幕里探出来;下方满街黄色出租车。

过程怎么推进

约 2–16s 她在屏里换姿势:坐起、站立、张开双臂、跪姿、伸懒腰,始终贴着屏幕边缘表演。

关键变化

约 18s 她捧出一个黑色罐子伸出屏外,约 22s 镜头前的手伸上去,约 23s 接住,罐子到了现实里。

结尾怎么收

约 25s 她在屏里举手欢呼,手握罐子在前景,约 28s 她退回屏中站好。

跟做照抄这一点

前半段只做「人在转角屏里」的立体感,产品留到后半从屏幕递到观众手里。

三步搞懂

别急着上视频模型。这个片子的秘密是:先把角色和场景锁死,再一次生成 6 个镜头。

1

生成 3 张参考图

Elena 角色设定板、夜景空广告牌街景板、黑金面霜产品图。顺序固定,后面当 @Image1–3。

2

打开 Seedance 2.5

设置:1080p · 约 30 秒 · 打开声音。把 3 张图按顺序挂上(Elena → 夜景广告牌 → 面霜罐)。

3

粘贴完整视频提示词

一次生成整段「变形屏递瓶」。必须一镜到底、广角手持抖动、不要推近;屏内人物始终小于屏幕。

步骤一 · 做出这 3 张参考图

推荐用 GPT Image / 同等图模,比例 4:3。每张点开即可复制完整英文提示词。

REF 01

Elena · 角色与状态板

角色设定板 · @Image1 · GPT Image · 4:3

第 1 步
Elena · 角色与状态板
▸查看完整出图提示词(点击复制区)
复制
Character-design reference sheet layout on a clean light cream background, neatly organized like an official character model sheet, all views showing the SAME woman, fully consistent. Layout: top-left a title block reading "ELENA" with a short info list (NAME: Elena / AGE: late 20s / ROLE: fashion model / PERSONALITY: playful, witty, big expressive face); below it a COLOR PALETTE section with labeled swatch rows for HAIR, EYES, SKIN, OUTFIT; center: a large FRONT VIEW bust portrait mid-laugh with a wide open-mouthed smile and crinkled eyes, and beside it a SECOND bust portrait with one eyebrow high and lips pursed to one side, both labeled; right: a full-body "START STATE" panel — she sits on a bare pale floor wearing ONLY a white cropped sleeveless tank top and plain white briefs, BAREFOOT, bare legs, with a pair of dark blue denim jeans lying crumpled on the floor beside her, labeled; below it a full-body "DRESSED" panel standing in the same tank top with the dark blue jeans pulled on, still barefoot, labeled; bottom: a DETAILS strip of four captioned close-up panels (voluminous wavy auburn-red hair, one eye caught mid-wink with deep eye-corner creases, bare feet, the crumpled dark blue jeans as a separate prop). The character: a late-20s Caucasian woman — voluminous wavy auburn-red hair, slate-blue eyes, fair natural skin, a big mobile expressive face. Every panel is a REAL candid photograph of the same woman — soft natural daylight, unedited raw photo look, gentle contrast, natural skin, no retouching. Clean minimal English labels only.
REF 02

夜景广告牌空镜

场景空镜板 · @Image2 · GPT Image · 4:3

第 2 步
夜景广告牌空镜
▸查看完整出图提示词(点击复制区)
复制
Empty scene plate, no featured character: a low-angle view from a crowded street-level crosswalk looking up at a massive curved corner 3D LED billboard on a modern skyscraper at a Times Square style intersection at night. IMPORTANT SCALE: the billboard is enormous — roughly ten storeys tall — and the pedestrians and yellow taxis at the bottom of frame are tiny by comparison; the building's corner edges, neighbouring glowing ad screens and scaffolding are all visible around the billboard, and the crowded crosswalk with taxis fills the lower third of the frame. The 3D LED stage area is EMPTY. Vibrant neon night lighting, wet asphalt reflections, soft haze. Photoreal broadcast camera look, flat realistic contrast, raw unedited footage look, no text anywhere on the screens, no logos.
REF 03

黑金面霜 · 产品图

产品静物板 · @Image3 · GPT Image · 4:3

第 3 步
黑金面霜 · 产品图
▸查看完整出图提示词(点击复制区)
复制
Product photograph of a high-end luxury skincare cream jar: a glossy jet-black rounded bulbous jar with a matching black domed lid, turned about 30 degrees away from camera so the front label area catches a soft highlight and is only partly legible; slim gold metallic lettering runs across the front. Sitting on a clean dark neutral surface, soft studio reflections, crisp macro focus on the jar's curved edge and lid. Photorealistic, luxury cosmetics product photography.

步骤二 · 6 镜头故事板(人话版)

方便你对照成片理解每一镜在干什么。

  1. Shot 1 — 苏醒 · ~5s:Elena 蜷在暗色 LED 舞台上,穿白背心与内裤、赤脚;身旁扔着深蓝牛仔裤。撑起身,整颗头猛地转向街面,双手「whoa」举到脸侧
  2. Shot 2 — 穿裤 · ~5s:坐起拖过牛仔裤套上、扭胯踮脚扣好;双臂大张、抬下巴、侧胯「ta-da」定格——头仍只到屏幕中部,上方留白
  3. Shot 3 — 转身 · ~5s:背对街道、双手撑地、塌腰扭胯两下,红发甩过肩;猛回头看人群,一掌拍上自己胯侧;下方手机齐刷刷举起
  4. Shot 4 — 递瓶 · ~5s:从屏底捞起黑金面霜举过头顶,再探出下沿做透视;对镜头口型同步喊出:「The harder you go on me... the softer I get.」
  5. Shot 5 — 交接 · ~5s:前景真人手伸入画面接过罐子;屏上 Elena 空手一合、双臂上举佯怒、赤脚跺地,再捂嘴前俯大笑
  6. Shot 6 — 定格 · ~5s:前景手略放低罐子、金字反光;屏上 Elena 站直、双手大吹吻,笑声里出租车与人群继续流动。定格,结束
关键约束:一镜到底广角手持不推近;屏内人物始终小于屏幕;不要加 BGM(仅环境声);尺度锁定;开场仅穿背心内裤赤脚、牛仔裤在地上。

步骤三 · 完整视频提示词

直接全选复制到 Seedance。@Image 1–3 必须对应上面 REF 01–03。

GEN 01

HR Replasty · Anamorphic Billboard · ~30s · 1 Shot / 6 Beats

Seedance 2.5 · continuous wide handheld · diegetic sound only

复制
[GEN 1 — ANAMORPHIC BILLBOARD HANDOFF]
[GLOBAL] NO background music — diegetic sound only. ONE continuous 16-second WIDE shot from one street-level position. NO cuts in the camera shot or billboard content; both keep the same framing. Raw unedited broadcast footage, natural night contrast, vibrant neon glow, wet asphalt reflections, soft haze.

CAMERA (critical): VERY SHAKY HANDHELD — organic jitter, drift, breathing sway and imperfect corrections from a person in the crowd. Keep WIDE throughout: NO push-in, NO zoom, NO re-centring, and the camera does NOT follow Elena or reframe when she stands. Keep the billboard the same size throughout. The building's corner edge, the neighbouring ad screens and the crowded crosswalk with yellow taxis remain visible in frame the whole time.

SCALE LOCK (critical): the billboard is enormous — about ten storeys tall — and the pedestrians and taxis in the lower third of frame are tiny by comparison and stay in frame as the size reference. The LED stage inside the billboard is about THREE TIMES Elena's standing height: when she stands up fully she occupies only the middle third of the screen's height, with a large area of empty LED stage above her head and open space on both sides. She must never fill or overflow the screen area, and never appear larger than the screen that contains her.

CHARACTERS & ENVIRONMENT: ELENA (match @Image1 exactly) — voluminous wavy auburn-red hair, slate-blue eyes. TSX-style night intersection (match @Image2 exactly) with a dense pedestrian crowd and continuous taxi traffic. The skincare jar (match @Image3 exactly).

START STATE (critical): at the very first frame Elena is lying curled on the dark LED stage floor wearing ONLY a white cropped sleeveless tank top and plain white briefs — BARE LEGS, BARE FEET, NO jeans, NO shoes, NO socks. A pair of dark blue denim jeans lies crumpled on the stage floor beside her, clearly visible as a separate object before she touches it. She stays barefoot for the entire film — she never puts on shoes.

ACTING — PROJECT WITH THE BODY (critical): Elena is small inside a giant screen. Project each emotion through a LARGE, silhouette-readable action: whole-head snaps and tilts, shoulders thrown up or shaking, arms flung wide, a hand slapped over the mouth, a hip cocked, a bare foot stamped, a blown kiss. Give ONE clear big action per beat and let it hold — never several small ones at once. Grins, brow lifts and a wink accompany the readable body actions. Accurate lip-sync on the spoken line.

CROWD: people on the crosswalk stop walking, tip their heads back, raise phones, point up and react audibly as the 3D illusion works.

No on-screen text, no burn-in subtitles, no captions, no logos anywhere except the jar's own lettering. NO background music — diegetic sound only: heavy traffic rumble, taxi horns, dense crowd chatter, gasps and cheers from the onlookers, her voice carrying down over the street, night city hum.

Shot 1: ONE continuous wide shot from a low-angle street-level position at the crosswalk, the giant curved billboard above and the crowd and yellow taxis in the lower third, very shaky handheld, no cuts. Elena performs six consecutive beats in this uninterrupted frame:
(1) WAKE: on the empty dark LED stage Elena lies curled on her side in just the white tank top and briefs, bare feet tucked up, the crumpled dark blue jeans on the floor beside her. She pushes up onto one elbow — then her WHOLE HEAD snaps toward the street below and her upper body recoils back an inch, both hands flying up beside her face in a big open-palmed "whoa"; she holds that shape a beat while the crowd noise swells.

(2) DRESSING: she sits up, drags the crumpled jeans across the stage floor toward her, and works them up her bare legs — a full hip shimmy, a hop up onto her toes, both hands hauling the waistband and buttoning it. Then she throws both arms straight out wide, chin up and one hip cocked, holding a big "ta-da" silhouette for a beat. The camera keeps drifting and shaking but does not push in; her head has risen only to the middle of the screen, with empty LED stage still above her.

(3) THE TURN: she pivots her back to the street, plants both hands on the stage floor, arches her back and rocks her hips twice, her long auburn hair swinging heavily forward over one shoulder. She whips her head around to look back over her shoulder at the crowd — the head turn itself is the beat — and smacks one hand down on her own hip. Below, phones go up along the crosswalk.

(4) THE OFFER: she straightens, reaches down out of the bottom of the screen and comes back up holding the glossy black skincare jar — she raises it OVER HER HEAD in both hands like a trophy, a big unmistakable silhouette, then lowers it and leans far out over the screen's lower edge, one arm extended in forced perspective so the jar appears to break out of the billboard. Head tilting on the first word and a shrug rolling through both shoulders on the last, she calls down at the lens, lips in accurate sync: "The harder you go on me... the softer I get."

(5) THE HANDOFF: a real human hand rises into the bottom foreground of the camera frame, reaches up toward the billboard and TAKES the jar — the physical jar now solid in the foreground hand, while up on the screen Elena's hand closes on nothing. She snaps her empty fingers shut, throws both arms up in mock outrage and stamps one bare foot on the stage — then claps a hand over her mouth and doubles forward, shoulders shaking with laughter.

(6) HOLD: still the same wide handheld frame — the foreground hand lowers the jar a little, its gold lettering catching a highlight, and up on the enormous billboard Elena straightens, blows a big two-handed kiss down at the street, and stands there laughing as taxis and the crowd keep moving below. Hold. End.

REPEAT: NO background music at any point — diegetic sound only. Camera and billboard stay wide and uncut.

这是 Demo

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