video-background-removal

视频背景移除

使用 each::sense 移除并替换视频背景。此技能可为任何视频内容实现透明背景、虚拟环境、专业合成和创意背景效果。

功能

• 透明背景：彻底移除背景，便于合成
• 纯色替换：替换为任意纯色（白色、黑色、品牌色）
• 图片背景：将主体合成到静态图片背景上
• 视频背景：将主体置于动态视频背景中
• 虚拟办公室：适用于远程办公的专业会议背景
• 绿幕效果：无需实际绿幕即可实现色键抠像效果
• 背景模糊：为视频通话添加保护隐私的模糊效果
• 动态背景：在主体后方添加动态运动图形
• 产品视频：移除或替换背景，打造干净的产品视频素材
• 访谈视频：打造专业的演讲者背景

快速开始

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove the background from this video and make it transparent"}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/my-video.mp4"]
  }'

使用场景示例

1. 移除视频背景（透明）

创建透明背景视频，以便在视频编辑器中进行合成。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove the background from this video completely. Output should have a transparent background so I can composite it in my video editor. Keep the subject cleanly isolated with smooth edges."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/presenter-video.mp4"]
  }'

2. 替换为纯色

将背景替换为干净的纯色，打造专业内容。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Replace the background of this video with a solid white background. Keep the subject sharp and well-isolated. Clean edges, professional look suitable for corporate presentations."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/interview-clip.mp4"]
  }'

3. 替换为图片背景

将主体合成到静态图片背景上。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove the background from this video and replace it with the provided image. Blend the subject naturally into the new scene with appropriate lighting and shadows."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/person-talking.mp4"],
    "image_urls": ["https://example.com/beach-sunset-background.jpg"]
  }'

4. 替换为视频背景

使用动态视频背景制作动态合成效果。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove the background from my video and replace it with the second video as the new background. Sync the timing and make the composite look natural."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": [
      "https://example.com/foreground-subject.mp4",
      "https://example.com/cityscape-background.mp4"
    ]
  }'

5. 虚拟办公室背景

打造专业的虚拟会议背景。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Replace the background with a professional modern office environment. Clean minimalist design with bookshelves, plants, and soft natural lighting. Suitable for executive video calls and professional meetings."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/webcam-recording.mp4"]
  }'

6. 绿幕替换（无需绿幕）

从任意视频中实现色键抠像般的效果，无需绿幕。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Extract the person from this video as if it was shot on a green screen. Clean matte extraction with no background spill. Output with transparent background or green screen color for post-production keying."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/filmed-at-home.mp4"]
  }'

7. 模糊视频背景

为视频通话和内容添加保护隐私的背景模糊效果。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Apply a smooth gaussian blur to the background while keeping the person in focus. Moderate blur intensity - enough to hide details but keep sense of depth. Natural bokeh effect like a portrait mode camera."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/home-office-call.mp4"]
  }'

8. 替换为动态背景

添加动态运动图形或动态背景。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove the background and replace it with an animated gradient background. Smooth flowing colors transitioning between blue and purple. Subtle movement, not distracting. Professional motion graphics style."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/content-creator.mp4"]
  }'

9. 移除产品视频背景

为电商和营销打造干净的产品视频素材。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove the background from this product video. The product is a rotating sneaker on a turntable. Make the background pure white for e-commerce use. Maintain all product details, reflections, and shadows."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/product-360-spin.mp4"]
  }'

10. 替换访谈视频背景

为演讲者和访谈视频打造专业背景。

curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Replace the background in this talking head video with a professional studio setting. Dark backdrop with subtle colored accent lighting like a podcast studio or news desk. Keep the presenter well-lit and naturally composited."}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/youtube-video.mp4"]
  }'

多轮工作流示例

使用 session_id 在多个请求中迭代调整背景替换效果。

# Initial background removal
curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove the background from this video of me presenting"}],
    "model": "eachsense/beta",
    "stream": true,
    "session_id": "bg-removal-project-001",
    "video_urls": ["https://example.com/presentation.mp4"]
  }'

# Iterate with different background
curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Now replace it with a modern tech office background instead"}],
    "model": "eachsense/beta",
    "stream": true,
    "session_id": "bg-removal-project-001"
  }'

# Fine-tune the result
curl -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "The edges look a bit rough around my hair. Can you refine the matte for better edge quality?"}],
    "model": "eachsense/beta",
    "stream": true,
    "session_id": "bg-removal-project-001"
  }'

模式选择

根据需求选择合适的模式：

模式	最适合	速度	质量
max	最终成片、客户交付内容	较慢	质量最高，边缘检测效果最佳
eco	快速预览、概念测试、草稿	较快	质量良好，适合审核

建议： 使用 eco 模式测试背景，使用 max 模式渲染最终成片。

最佳实践

获得干净的抠像效果

• 光线：光线充足的主体比低光素材更容易抠像
• 对比度：主体与背景之间的对比度越高，效果越好
• 运动：较慢的动作能产生更干净的遮罩
• 头发／细节：对于头发复杂的主体，请求“精细边缘”

实现自然的合成效果

• 光线匹配：请求与素材光线相匹配的背景
• 色彩分级：要求匹配主体与背景的色彩
• 阴影：请求自然的阴影位置，使合成画面更有落地感
• 景深：使背景模糊程度与摄像机的景深相匹配

实现专业效果

• 指明使用场景（企业、社交媒体、广播）
• 说明输出要求（分辨率、格式）
• 请求符合品牌风格的特定背景样式

提示词技巧

请求移除或替换背景时，请包含以下信息：

1. 源素材描述：视频中有什么（人物、产品等）
2. 背景目标：透明、纯色、特定场景、模糊
3. 质量要求：边缘质量、阴影处理、反射
4. 使用场景：视频将用于何处
5. 风格匹配：光线、色调、氛围

提示词结构示例

"Remove/replace the background from this [subject type] video.
[New background description or transparent/solid color].
[Edge quality and compositing requirements].
For use in [context/platform]."

错误处理

错误	原因	解决方案
Failed to create prediction: HTTP 422	余额不足	在 eachlabs.ai 充值
超时	视频处理需要时间	将客户端超时设为至少 10 分钟
边缘质量较差	头发等复杂细节	在提示词中要求“精细的边缘检测”
未能检测到主体	视频素材对比度较低	尝试使用光线更好的素材，或指定主体位置

超时配置

视频背景移除需要大量计算。请为 HTTP 客户端配置足够的超时时间：

• 建议的最短超时时间：10 分钟（600 秒）
• 对于较长的视频：按比例增加超时时间（视频每 10 秒设置 1 分钟超时）

# Example with explicit timeout using curl
curl --max-time 600 -X POST https://eachsense-agent.core.eachlabs.run/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $EACHLABS_API_KEY" \
  -H "Accept: text/event-stream" \
  -d '{
    "messages": [{"role": "user", "content": "Remove background from this video"}],
    "model": "eachsense/beta",
    "stream": true,
    "mode": "max",
    "video_urls": ["https://example.com/long-video.mp4"]
  }'

相关技能

• each-sense - 核心 API 文档
• product-video-generation - 创建电商视频
• video-generation - AI 视频生成
• image-background-removal - 静态图像背景移除