Video Cropper
Crop the frame so attention stays on what matters.
Problem it solves
A video can be technically fine but compositionally wrong for the job: too much empty space, distracting edges, irrelevant background, or a subject that needs to fill the frame better. This skill helps tighten framing for platform use and better viewer focus.
Use when
- - The subject is too small in frame
- The edges contain distracting or unnecessary information
- The user wants a tighter product, face, or demo crop
- The same source needs cleaner framing for social or ecommerce placement
Do not use when
- - The subject moves too much for static crop logic
- Intelligent motion tracking is required
- Resize or compression is the real problem, not framing
Inputs
- - Source video file
- Area to preserve: face, hands, product, subtitles, full object, etc.
- Target use case or platform
- Desired framing style: tight, balanced, or conservative
Workflow
- 1. Identify what should remain in frame.
- Remove wasted or distracting space.
- Keep the crop useful for platform context and subject readability.
- Export the tighter composition.
- Flag when a static crop may fail because subject motion is too large.
Output
Return:
- 1. Chosen crop focus
- Framing rationale
- Output fit for the target use case
- Risks if motion may leave the crop area
Quality bar
- - Preserve the true subject, not just the geometric center
- Avoid awkward amputations of hands, products, or subtitles
- Prefer useful framing over maximum zoom-in
- Warn when static crop is likely to break on motion-heavy footage
Resource
See
references/output-template.md.
视频裁剪器
裁剪画面,让注意力集中在关键内容上。
解决的问题
一段视频在技术上可能没有问题,但在具体用途上构图不当:空白区域过多、边缘存在干扰、背景无关紧要,或者主体需要更好地填充画面。此技能有助于优化画面构图,使其更适合平台使用,并提升观众的注意力集中度。
适用场景
- - 画面中的主体过小
- 边缘包含分散注意力或不必要的信息
- 用户需要对产品、人脸或演示进行更紧凑的裁剪
- 同一素材需要更干净的构图用于社交媒体或电商展示
不适用场景
- - 主体运动幅度过大,不适合静态裁剪逻辑
- 需要智能运动追踪
- 实际问题是调整尺寸或压缩,而非构图问题
输入
- - 源视频文件
- 需要保留的区域:人脸、手部、产品、字幕、完整物体等
- 目标用途或平台
- 期望的构图风格:紧凑、均衡或保守
工作流程
- 1. 确定画面中应保留的内容。
- 移除多余或分散注意力的空间。
- 确保裁剪结果适用于平台场景且主体清晰可辨。
- 导出更紧凑的构图。
- 当主体运动幅度过大可能导致静态裁剪失败时,进行标记。
输出
返回:
- 1. 选定的裁剪焦点
- 构图理由
- 符合目标用途的输出效果
- 若运动可能导致主体移出裁剪区域的风险提示
质量标准
- - 保留真正的主体,而非仅仅几何中心
- 避免对手部、产品或字幕进行生硬的裁切
- 优先选择有用的构图,而非最大程度放大
- 当静态裁剪在运动幅度大的素材上可能失效时,发出警告
参考资料
参见 references/output-template.md。