AI B-roll 生成器
通过文字提示词或参考图片生成一条 5–10 秒、带音频的连续镜头，可直接剪进你的成片。
Direct the frame. Choose the engine.
i2v-portrait.jpg上传首帧示例
用 AI 生成短 B-roll 镜头
描述一个补充镜头的主体、动作、运镜、光线和声音氛围。iiss 会生成一条连续短片，供你预览、下载并剪入最终视频。
AI B-roll 视频示例
以下展示四个计划制作的 B-roll 案例。视频将在 iiss 完成生成与审核后展示在这里。
Create an 8-second horizontal 16:9 commercial B-roll clip in one continuous shot. A premium amber glass serum bottle sits on a pale travertine pedestal. The camera slowly pushes in as a narrow beam of morning light travels across the glass and a few water droplets catch the highlights. Add subtle studio room tone and a delicate glass chime. Keep the bottle shape stable; no readable text, no logos, no hands, no cuts, no voiceover, no music. End on a clean product detail shot.
Create an 8-second horizontal 16:9 nature B-roll clip in one continuous low tracking shot along coastal dune grass moving gently in the sea breeze. Soft waves roll in the background and late-afternoon light glints on the water. Add natural wind, distant surf, and faint seabirds. Keep camera movement smooth and realistic; no people, no text, no music, no scene cuts.
Create an 8-second horizontal 16:9 urban B-roll shot in one continuous lateral tracking move along a rain-soaked downtown crosswalk at blue hour. Headlights glide across wet pavement and reflections shimmer in puddles; pedestrians remain distant and indistinct. Include soft traffic wash, light rain, and footsteps in the distance. No readable signs, no logos, no dialogue, no music, no cuts.
Create an 8-second horizontal 16:9 abstract texture B-roll clip in one continuous macro shot. Pearlescent ink slowly curls and diffuses through clear water, forming layered ribbons of deep teal, silver, and warm amber. The camera drifts gently sideways as tiny particles catch a soft studio light. Add delicate underwater bubbling and a subtle liquid swish, no voice, no music, no text, no logos, no cuts.
一个镜头，一个清晰动作
好的 B-roll 提示词应写明主体、简单动作、一个运镜、光线情绪和声音氛围。保持每条素材聚焦，方便自然地插入主视频镜头之间。
5–10 秒、带音频、直接可剪
生成一条带有相应环境声或音效的连续镜头。可用作产品细节、自然空镜、城市补充镜头或抽象视觉素材。正式使用前，请检查实际运动和音频效果。
可复制的 B-roll 提示词
先描述主体和动作，再补充构图、一个运镜、光线和具体的声音氛围。每条提示词只描述一个短镜头。
Create an 8-second horizontal 16:9 product B-roll shot: an amber serum bottle on pale stone, a slow push-in, morning light moving across the glass, soft room tone and a delicate glass chime. One continuous shot, no text or logos.
Create an 8-second horizontal 16:9 nature insert of coastal grass bending in the sea breeze, soft waves in the background, a smooth low tracking shot, natural wind and distant surf. One continuous shot, no text or music.
Create an 8-second horizontal 16:9 city cutaway at blue hour: rain-slick pavement reflecting passing headlights, a slow lateral camera move, soft traffic wash and light rain. One continuous shot, no readable signs or logos.
AI B-roll 生成器常见问题
什么是 AI B-roll 生成器？
AI B-roll 生成器用于创建可剪入较长视频的补充镜头。iiss 专注于单条 5–10 秒短片，而不是自动拼接完整的多场景视频。
iiss 的 B-roll 素材有多长？
iiss 面向 5–10 秒的单镜头连续短片。实际时长取决于所选模型和生成设置。
B-roll 视频包含音频吗？
支持的模型可以随视频生成音频。具体声音会因提示词和模型而异，剪入成片前请检查生成结果。
可以把产品照片变成 B-roll 吗？
可以。在图生视频模式上传参考图，再描述运镜、光线或环境运动。生成后请检查产品外观和标签的一致性。