AI B-Roll 生成器

在与您的影片相同的画布上,通过一张静止图像和一段简短提示词,制作主场景周围的建立镜头、细节、天气和转场。

一幅墨水画,画着导演椅,旁边有一个扩音器,地上有散落的胶片条

仅由主要动作剪辑而成的短片会让人感到窒息:每个场景都从台词中间开场,然后直接跳到下一个。B-roll,即围绕主要动作的辅助镜头,如地点全景、细节特写、天气场景或过渡画面,能让剪辑获得呼吸空间。在 AI b-roll 生成器出现之前,获得这些镜头意味着需要进行二次拍摄或使用永远不匹配的素材库片段。我们从 10 部在 Flick 中制作的影片中提取了 10 个 b-roll 片段,其中 9 个是从起始帧动画生成的,并阅读了它们背后的每个提示词。本页面展示了每个片段及其精确提示词、在 Flick 中制作你自己的 b-roll 的四个步骤,以及这些提示词共享的五个习惯。

描述一个 b-roll 镜头

描述镜头,或从下方选择一个真实提示词,它将作为新 Flick 项目中的第一个请求打开。

什么是 AI b-roll?

AI b-roll 是辅助素材,即剪辑在影片主要动作周围的镜头,由视频模型从静态图像或提示词生成,而非实际拍摄。
  • 定场镜头:一个广角视图,告诉观众下一个场景发生的地点和时间。
  • 插入镜头:剪入场景的特写细节,如灯具、手部或标识。
  • 切出镜头:暂时离开主要动作的镜头,如窗外的鸟,然后再返回。
  • 过渡镜头:将影片从一个场景、地点或时间带到下一个的镜头。

AI 建立镜头

定场镜头最好是对地点的一次缓慢的镜头移动,并在提示词中说明光线和时间。
Drone view of a small sedan on a winding autumn road through misty hills
第一帧:Drone view of a small sedan on a winding autumn road through misty hills
第一帧
00:05

无人机在黎明时分从乡村道路上拉远

Wide cinematic drone shot slowly pulling back from the winding country road as the small sedan cruises forward peacefully through rolling autumn hills. Soft morning mist drifts across the landscape. Autumn leaves swirl gently in the breeze. Golden light filters through the haze. Calm, unhurried movement — peaceful and idyllic.
M.E. Owens 执导的《One More Day》
含义:无人机广角镜头缓缓后拉小轿车在秋日薄雾山丘间宁静行驶金色晨光
Aerial view of an English country garden with hedges and a brick manor
第一帧:Aerial view of an English country garden with hedges and a brick manor
第一帧
00:25

从起始帧到结束帧的摇镜头转推镜头

Opening establishing shot, 16:9, 25 seconds, one continuous uninterrupted take. The shot begins wide on the open countryside of the start frame and slowly transitions to settle on the painting cottage of the end frame.

Camera Movement: Begin with a slow, smooth lateral pan drifting across the countryside, gliding over rolling fields, water, and treelines, letting the landscape reveal itself gradually. After the pan carries across the vista, the camera eases into a gentle, steady push-in that zooms toward the cottage, tightening from a sweeping wide vista down to a composed medium framing of the painting cottage as it comes to rest. The motion is continuous and cinematic throughout, one flowing move with no cuts, never rushed.

Scene: Soft natural daylight, gentle atmospheric depth and haze on the horizon, subtle drifting of grass and leaves in a light breeze, calm water surface with faint ripples. Serene, contemplative, cinematic mood.

Audio Constraint: No sound. Completely silent shot.
Sandi Jerome 执导的《Churchill's Mum》
含义:摄影机横摇推进从开阔乡村景观到湖边小屋柔和日光宁静电影感无声
Wet truck stop parking lot at night with rows of semi-trucks under lamps00:04

夜晚卡车休息站上方的俯冲镜头

[00:00] camera booms down on the truck stop at night. a large semi-truck "big rig" drives past camera.
Dr. Dreams 执导的《Catch Out》
含义:夜晚摄影机俯冲拍摄卡车停靠站大型半挂卡车驶过镜头
Pastel cartoon spaceship with round portholes drifting through space
第一帧:Pastel cartoon spaceship with round portholes drifting through space
第一帧
00:05

卡通飞船的缓慢漂移

The spaceship travels slowly through space. The thrusters glow and pulse gently. Subtle light glare sliding across the round windows. Very slow, calm, cinematic drift. Do not rotate. Establishing shot mood.
Katrin Ann Orbeta 执导的《Mila & Sasa》
含义:宇宙飞船在太空中缓慢漂移推进器发光脉动窗户反光平静电影感镜头

AI 插入和切换镜头

对于特写或切入镜头,保持镜头静止,只说出那个移动的东西,这样画面在一两秒内就能读懂。
Oil lamp glowing beside an old theatre poster on a blue wall
第一帧:Oil lamp glowing beside an old theatre poster on a blue wall
第一帧
00:10

用一句话描述闪烁的油灯

The oil lamp’s flame flickers, which makes the shadow flickers accordingly.
Jaime Yao 执导的《In Our Time》
含义:油灯火焰闪烁导致影子随之摇曳变化
Black crow on a weathered fence post above a golden prairie
第一帧:Black crow on a weathered fence post above a golden prairie
第一帧
00:05

一只乌鸦落下,其他一切静止

A single black crow flies in and lands on top of the weathered wooden fence post. Once perched, it settles its wings and looks around with quick, natural bird movements, tilting and turning its head to survey the surroundings. Subtle feather ruffle in the light breeze. Everything else stays still: the fence, wires, and blurred golden prairie background hold steady with warm late-afternoon light. Grounded, realistic wildlife motion, no camera movement.
Marius Jensen 执导的《Still Time》
含义:一只黑乌鸦飞来落在木栅栏柱上整理羽毛转头观察温暖午后光线

AI 天气和氛围镜头

氛围空镜将所有运动放在天气中——暴风雨、雨或风,围绕着一个原本静止的画面。
Metal chamber half buried in sand in an orange sandstorm
第一帧:Metal chamber half buried in sand in an orange sandstorm
第一帧
00:06

锁定画面周围的沙尘暴

GLOBAL SETTINGS:
Duration: 6s. Aspect ratio: 16:9. No background music, no score. Ambient sound effects only — a deafening sandstorm roar, wind howling, sand hissing and rattling against the metal chamber.

@image1 is the start frame — the exterior of the chamber in the storm. Preserve it exactly.

Camera: locked-off and completely static — no drift, no pan, no tilt, no push. The frame stays exactly where it starts.

Color grade: strict palette — deep teals and cool greys for the chamber #161E20, #253534, #1B2727, #3F5153, #545456, #777775, warm amber #F2A462 and burnt sienna #BE704A for the sandstorm and light. No colors outside this palette. Cinematic photorealism, heavy atmospheric haze, film grain.

MOTION (0–6s):
The sandstorm rages around the static chamber. Sand streams and churns across the frame at speed, driven hard by the wind — tan haze billowing and rolling, thickening and thinning unevenly over the six seconds but never clearing. Loose sand blows and drifts against the base of the chamber, small grains kicking up off the ground. The chamber itself is unmoving, sealed, indifferent — everything alive in the shot is the storm. Relentless, violent, uninhabitable. Camera never moves.
Owen Doerr 执导的《Lifeguard》
含义:沙尘暴中静止镜头金属舱体在狂风呼啸飞沙中屹立不动青灰与琥珀色调
Stone kitchen window as a sunny day turns to a thunderstorm
第一帧:Stone kitchen window as a sunny day turns to a thunderstorm
第一帧
00:04

透过窗户,晴天转为暴风雨

Pema's POV looking out through the kitchen window. What was a sunny day suddenly turns: heavy rain lashes the glass, a violent thunderstorm rolls in, wind whipping, a flash of lightning, water streaming down the windowpanes. Handheld camera settling at the window as if she has just stopped there. Anamorphic old lens distortion, muted colors, low contrast, soft focus, cinematic realism.
Raj Rishi More 执导的《Seasons》
含义:佩玛从厨房窗户向外看,晴天突然变成暴雨雷电,雨水冲刷玻璃,手持摄影机,变形镜头,柔和写实风格。

AI 转场镜头

过渡镜头以某种下一个场景可以切入的画面结束,例如全黑或留空的房间。
Candlelit chapel with hanging oil lamps just before a gust of wind
第一帧:Candlelit chapel with hanging oil lamps just before a gust of wind
第一帧
00:04

一阵风吹灭所有火焰,然后黑屏

One continuous locked-off shot.
The camera stays in place with visible irregular handheld drift and small natural balance corrections.
The flames flicker naturally. Smoke continues rising slowly through the firelight.

A sudden gust of wind passes through the chapel.

The visible candle flames and hanging oil-lamp flames bend sharply in the same gust, then extinguish rapidly across the room.

The remaining firelight disappears.

The frame becomes completely black.

Hold briefly on full black.
Jaime Yao 执导的《In ’twixt Vows》
含义:固定镜头拍摄教堂内,蜡烛和油灯火焰摇曳,突然一阵风吹过,所有火焰熄灭,画面完全变黑。
Toy knight in armour raising one hand in a bare room, before he dissolves into pencil powder
第一帧:Toy knight in armour raising one hand in a bare room, before he dissolves into pencil powder
第一帧
00:10

一个骑士消失,留下空荡的房间

Locked camera.
The little knight raises one hand and looks at it.
The hand starts dissolving into colored pencil powder first.
The powder spreads from the hand to the arm and the rest of the body.
He quickly dissolves completely into colored pencil powder.
No character remains at the end. No backgoround music.
Jaime Yao 执导的《A Proper Introduction》
含义:小骑士举起手看着它从手开始溶解成彩色铅笔粉末,粉末蔓延全身直到角色完全消失。

如何在 Flick 中用 AI 制作 b-roll?

制作一张与你场景匹配的静帧,用简短的运动提示词让它动起来,保留最佳镜头并将其剪辑到场景之间。
  1. 第 1 步

    制作匹配的静帧

    在场景所属位置生成或上传一个画面,保持相同的地点、光线和色调,就像《One More Day》的开场画面一样。

    Still of a silver sedan on a country road in autumn hills, the start frame of a drone shot
    M.E. Owens 执导的《One More Day》
  2. 第 2 步

    只描述运动

    使用该静止画面作为起始帧打开图像转视频功能,然后描述哪些部分在运动,因为画面已经确定了地点和外观。

    Miniature market street in late afternoon haze, where one small figure walks across a still crowd
    第一帧:Miniature market street in late afternoon haze, where one small figure walks across a still crowd
    第一帧
    00:10
    Jaime Yao 执导的《The Herder》 · Seedance 1.5 Pro · 图像转视频
  3. 第 3 步

    生成多个版本

    多次运行提示词,每次只改变一行,然后将最佳版本与其他版本并排放在画布上。

    Wet wooden ladder rising into heavy rain, filmed as the camera climbs rung by rung
    第一帧:Wet wooden ladder rising into heavy rain, filmed as the camera climbs rung by rung
    第一帧
    00:05
    Jaime Yao 执导的《The Herder》 · Seedance Pro · 图像转视频
  4. 第 4 步

    在场景之间进行剪辑

    在场景前放置建立镜头,在场景内插入特写和插入镜头,在一个场景过渡到下一个场景的位置添加转场。

    Night still of a rail yard behind a chain link fence, written as the opening shot of a scene
    Dr. Dreams 执导的《Catch Out》

什么让 b-roll 提示词有效?

这10部影片中的B-roll提示词保持镜头稳定,明确说明运动和光线,并重复主场景的外观。
  1. 1. 锁定镜头或放慢移动速度

    10个提示词中有7个锁定了镜头或要求缓慢移动,因为稳定的画面会被理解为刻意的镜头而非故障。

    Everything else stays still: the fence, wires, and blurred golden prairie background hold steady with warm late-afternoon light.
    Marius Jensen 执导的《Still Time》
    含义:栅栏电线和模糊金色草原背景保持静止,沐浴在温暖的午后阳光中。
  2. 2. 说明什么在运动,保持简短

    10个提示词中有4个不超过50个单词,因为有了起始帧后,提示词只需描述动作,几乎不需要其他内容。

    The oil lamp’s flame flickers, which makes the shadow flickers accordingly.
    Jaime Yao 执导的《In Our Time》
    含义:油灯火焰闪烁导致影子随之摇曳变化
  3. 3. 描述光线

    在提示词中说明光线和时段,可以让B-roll与周围场景保持在同一时间。

    Soft morning mist drifts across the landscape. Autumn leaves swirl gently in the breeze. Golden light filters through the haze.
    M.E. Owens 执导的《One More Day》
    含义:清晨薄雾飘过景观,秋叶在微风中轻轻旋转,金色光线透过雾霭洒落。
  4. 4. 匹配主场景的外观

    在提示词中重复影片的镜头、色彩和颗粒感,这样B-roll剪入时画面风格不会突变。

    Anamorphic old lens distortion, muted colors, low contrast, soft focus, cinematic realism.
    Raj Rishi More 执导的《Seasons》
    含义:变形老镜头畸变,柔和色彩,低对比度,柔焦,电影写实风格。
  5. 5. 在镜头中写入剪辑点

    对于转场,在提示词中以你想要剪切的画面结尾,例如全黑画面。

    The frame becomes completely black. Hold briefly on full black.
    Jaime Yao 执导的《In ’twixt Vows》
    含义:画面完全变黑并短暂保持全黑状态。

人们对 AI b-roll 有哪些疑问?

什么是B-roll?

B-roll是围绕影片主要动作(即A-roll)剪辑的辅助镜头:包括建立镜头、细节镜头、切出镜头和转场,用于交代地点和平滑剪辑。

AI能生成B-roll吗?

可以。图像转视频模型可以将某个地点或细节的静态画面转换为短片段,镜头运动和动态效果在提示词中描述。

有免费的AI B-roll生成器吗?

你可以在Flick中免费制作B-roll:注册时获得100积分,加入Flick Discord还能获得200积分。Free计划包含MiniMax H3 Fast、MiniMax H3 Max和Pruna Draft视频,Seedance 2.0和2.5包含在Standard计划中(每月$20)。

B-roll镜头应该多长?

几秒钟即可,足够让观众看清地点或细节,又不会拖慢故事节奏。在Flick制作的影片B-roll中,大多数片段时长为4到6秒。

如何让AI B-roll与我的主要镜头匹配?

从与主场景相同地点、光线和色调的静态画面开始制作每个B-roll片段,然后在提示词中再次说明镜头、色彩和颗粒感。

B-roll 和切出镜头有什么区别?

切出镜头是 B-roll 的一种,指短暂离开主要动作后再回归的镜头;B-roll 还包括确立镜头、插入镜头和转场镜头。

哪些镜头运动最适合用于 AI B-roll?

固定镜头和单一缓慢运动,例如无人机后拉、摇镜或下摇,因为一个平稳的运动能让模型需要创造的内容更少。

我可以在商业项目中使用 AI B-roll 吗?

可以。您在 Flick 上生成的内容归您所有,可用于个人和商业项目;详情请参阅使用条款。

更多关于在 Flick 中制作 AI 视频的内容

本页的影片

制作场景之间的镜头

从场景的静止画面开始。确立镜头、细节镜头和转场镜头与您的影片保持在同一画布上。

在 Flick 中制作 b-roll

免费试用,无需信用卡。

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