green-screen SKILL.md skillA
green-screen from zju-real/easel is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add zju-real/easel/green-screen@git:20261012.0d53744Pins git:20261012.0d53744 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- zju-real/easel
- Path
skills/builtin/green-screen/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261012.0d53744, committed Oct 12, 2026
- Size
- 3,267 bytes
- Repository stars
- 4,469
- License
- Apache-2.0
绿幕抠像 / 换背景 / 合成：把绿幕（或蓝幕/指定色）拍摄的前景人物抠出来，合成到新背景——图片、视频、纯色或前景自身模糊。当用户说 绿幕、抠像、抠图换背景、去绿幕、chromakey、绿幕合成、换背景、蓝幕、把绿幕背景换掉、人物抠出来、绿布 时使用。基于 shared/scripts/chromakey.py（ffmpeg chromakey + despill）。与 video-reframe 区别：reframe 只改画幅不换背景；与 ai-image-gen 区别：那个生成新图，本 SKILL 处理已拍的绿幕素材。.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 绿幕抠像 / 换背景合成 > 把绿幕前景抠出来合成到新背景。全部走 `skills/shared/scripts/chromakey.py`， > **不要手拼 chromakey/overlay 滤镜**——脚本已处理抠像、溢色抑制(despill)、边缘融合、 > 背景缩放、音轨保留。 > 只改画幅见 **video-reframe**；从零 AI 生成画面见 **ai-video-gen**；通用剪辑见 **video-editing**。 ## 输入 | 字段 | 必填 | 说明 | |------|------|------| | 前景视频 | 是 | 绿幕/蓝幕拍摄的素材（没给就问） | | 背景 | 是 | 四选一：图片 / 视频 / 纯色 / 前景自身模糊 | | 幕布色 | 否 | 默认绿 `0x00ff00`；蓝幕用 `0x0000ff` | ## 输出（`outputs/主题名/`） - 合成后视频（`*-composited.mp4`） - 报告：分辨率、抠掉的颜色、所用背景 ## 执行步骤 脚本路径（相对项目根）：`skills/shared/scripts/chromakey.py`（`key -h` 看参数）。 ```bash # 合成到图片背景 python skills/shared/scripts/chromakey.py key -i <绿幕视频> \ --bg <背景图> -o outputs/主题名/<名>-composited.mp4 # 合成到视频背景（背景自动循环补足） python skills/shared/scripts/chromakey.py key -i <绿幕视频> \ --bg <背景视频> -o outputs/主题名/<名>.mp4 # 合成到纯色背景 python skills/shared/scripts/chromakey.py key -i <绿幕视频> \ --bg-color white -o outputs/主题名/<名>.mp4 # 背景=前景自身放大模糊（虚化景深感） python skills/shared/scripts/chromakey.py key -i <绿幕视频> \ --bg-blur -o outputs/主题名/<名>.mp4 ``` ## 调参（抠不干净时） - **绿边残留 / 抠不净**：调大 `--similarity`（默认 0.30，可到 0.4）。 - **主体边缘被吃 / 镂空**：调小 `--similarity`，或加大 `--blend`（默认 0.10）柔化边缘。 - **主体泛绿（溢色）**：脚本已自动 `despill`；仍明显时说明幕布打光不匀，属素材问题。 …
Read the whole file at its exact version.
How to install
mdr add zju-real/easel/green-screen@sha256:516f15c58eefa9e3The line at the top of this page pins the label git:20261012.0d53744, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_mh4e53dmdxvkswu6)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 12, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3267 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
zju-real/easel · 4,469 stars · license Apache-2.0 · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mh4e53dmdxvkswu6 GET https://markdownregistry.com/api/v1/resolve?ref=zju-real/easel/green-screen GET https://markdownregistry.com/api/v1/blob/516f15c58eefa9e398ee972bd00b2f1e37cb9b5c5309bb427cbab3f47764d785
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.