如何用 Nano Banana 和 Gemini Omni Flash 把商品图变成电商短视频

2026/05/20

对电商卖家来说,最实用的 AI 工作流不是一次生成很炫的画面,而是先把商品图做准确、做干净,再把已经确认的商品图变成短视频,用于广告、产品页和社媒。

商品图 → Nano Banana 图片编辑 → 电商场景图 → Gemini Omni Flash 视频生成 → 广告 / 产品页 / 社媒素材

案例图:产品图 + 模特图可以生成一张更完整的电商宣传图。来源:Nano Banana Pro 搜索结果。

这篇教程会讲: 如何选择原始商品图,如何用 Nano Banana 清理和生成场景图,如何用 Gemini Omni Flash 把定稿图变成视频,以及如何用追加提示词修正结果。

1. 先选一张可信的商品图

不要一开始就追求创意效果。电商素材的第一原则是商品准确。选择一张产品主体清楚、Logo 可见、颜色接近真实商品、材质和包装文字尽量清楚的图片。

如果原图太模糊、遮挡严重或背景非常复杂,后面生成视频时更容易出现产品变形。

2. 用 Nano Banana 清理商品图

Nano Banana 适合处理商品图:清理背景、替换场景、生成产品 Mockup,并在提示词足够明确时保持商品一致。建议先用它做一张"定稿图",再进入视频生成。

Edit this product image for an ecommerce store. Keep the product shape, logo, packaging text, color, and material unchanged. Remove distractions, improve lighting, increase clarity, and use a clean professional background. Make the product look realistic and ready for a product page.

这条提示词适合普通手机拍摄图、背景杂乱图、偏暗图。关键是反复强调:产品不能变、Logo 不能变、包装文字不能变

3. 生成白底图和生活方式图

电商店铺通常至少需要两类图片:一类用于清楚展示商品,另一类用于让用户想象真实使用场景。

白底产品图

Create a clean white background product image. Keep the product exactly the same, including its shape, color, logo, packaging text, and material. Add realistic lighting and soft shadows. Make it suitable for an ecommerce product listing.

生活方式场景图

Place this product in a realistic lifestyle scene. Keep the product exactly the same. Do not change the logo, packaging text, color, or shape. Use natural lighting, realistic shadows, and a clean background that matches the product category.

案例图:干净、清楚的护肤品产品图,适合在进入视频生成前作为参考图。

不同品类可以换不同场景:护肤品放浴室台面,咖啡放厨房桌面,香薰蜡烛放卧室或书桌,户外用品放露营场景,时尚配饰放高级感桌面或试衣间。

4. 为不同渠道生成不同版本

不要一张图到处用。产品页、广告、短视频平台需要不同构图和比例。

网站首页 Hero 图

Create a 16:9 website hero image from this product photo. Keep the product on the right side and leave clean empty space on the left for headline text and a call-to-action button. Use a modern, premium ecommerce style.

竖版社媒图

Create a 9:16 vertical image for TikTok, Instagram Reels, and YouTube Shorts. Keep the product centered and clearly visible on mobile. Leave space at the top for a short headline. Use a clean and eye-catching ecommerce style.

广告素材图

Create a high-converting ecommerce ad creative from this product image. Keep the product accurate and recognizable. Use strong lighting, a clean background, and a clear focal point. Leave space for a short benefit-driven headline.

案例图:一张商品图可以继续生成详情页素材组,例如主视觉、卖点图、包装图和信任背书图。

5. 用 Gemini Omni Flash 把定稿图变成视频

Gemini Omni 的视频生成页面把它描述为"像 Nano Banana 一样做视频":可以把文字、图片和视频结合起来生成动态内容。对电商用户来说,最稳妥的方法是把已经确认过的商品图作为精确参考。

打开 Gemini Omni 视频生成页 · 打开 Google Flow

案例图:电商商品视觉可以继续转成产品页视频和广告视频素材。

商品图转短视频

Use this product image as the exact visual reference. Create a short 9:16 ecommerce product video for TikTok, Instagram Reels, and YouTube Shorts. Keep the product shape, logo, packaging text, colors, and material unchanged. Add a slow camera push-in, soft lighting, realistic shadows, and subtle background movement. Do not change the product design.

网站 Hero 视频

Turn this product image into a subtle 16:9 website hero video. Keep the product, logo, layout, text, and background style unchanged. Add gentle camera movement, soft lighting changes, and slight background motion. Make it calm, premium, and suitable for a landing page hero section.

生活方式产品视频

Create a short lifestyle product video from this image. Keep the product exactly the same. Add natural camera movement, soft light, realistic shadows, and small environmental motion. Make the scene feel real, warm, and suitable for ecommerce marketing.

6. 用追加提示词修正视频

第一次结果不一定完美。比起重新写一大段提示词,更建议用短句继续修改。

如果产品变形了

The product changed slightly. Please keep the product exactly the same as the reference image, especially the logo, packaging text, shape, color, and material. Regenerate the video with better product consistency.

如果运动太夸张

The motion is too strong. Keep the same video concept, but make the camera movement slower and more subtle. Do not change the product or background.

如果画面不够高级

Make the video feel more premium and professional. Use softer lighting, cleaner shadows, slower movement, and a more elegant ecommerce style. Keep the product unchanged.

如果需要留标题空间

Keep the product and video style unchanged, but leave more clean empty space at the top for a short headline. Do not add text inside the video.

三个电商实操案例

护肤品短视频

Create a 9:16 skincare product video from this image. Keep the bottle, logo, text, color, and shape unchanged. Place it in a clean bathroom scene with soft morning light, subtle water reflection, and slow camera movement. Make it suitable for TikTok and Instagram Reels.

咖啡产品广告

Create a short ecommerce video from this coffee product image. Keep the package exactly the same. Place it in a warm kitchen scene with morning light, subtle steam, realistic shadows, and slow camera movement. Make it cozy, natural, and suitable for a product ad.

时尚配饰展示

Create a premium 9:16 product video from this fashion accessory image. Keep the product shape, color, material, and details unchanged. Add slow camera movement, soft studio lighting, and a clean luxury background. Make it suitable for a fashion ecommerce ad.

发布前检查

  • 检查产品形状、Logo、包装文字、颜色和材质。
  • 价格、折扣、卖点、CTA 建议后期用 Canva、CapCut、剪映、Premiere 或店铺编辑器添加。
  • 至少导出三个版本:产品页图、竖版社媒图、产品短视频。
  • 先用简单动态:慢镜头推进、光影变化、轻微蒸汽、水面反射或背景微动。

一句话原则: 先让商品准确,再让它动起来。

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