Media

Video Chroma Key

Remove green screen or any colored background from video and replace with another video

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/video-chroma-key' \
  -F 'file=@/path/to/foregroundVideo.ext'
curl -X POST 'https://api.elysiatools.com/upload/video-chroma-key' \
  -F 'file=@/path/to/backgroundVideo.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/video-chroma-key' \
  -F 'foregroundVideo=/path/to/file.ext' \
  -F 'backgroundVideo=/path/to/file.ext' \
  -F 'color=green' \
  -F 'customColor=0x00FF00' \
  -F 'similarity=0.15' \
  -F 'blend=0.1' \
  -F 'outputFormat=mp4'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/video-chroma-key

Parameters

Name	Type	Required	Description
foregroundVideo	fileupload required	Yes	—
backgroundVideo	fileupload required	Yes	—
color	select	No	—
customColor	text	No	Custom color in hex format (e.g., 0x00FF00 for green)
similarity	range	No	Color similarity threshold (0.01-1). Lower = more exact color match, Higher = more colors removed
blend	range	No	Blend factor for edges (0-1). Higher = softer edges, Lower = harder edges
outputFormat	select	No	—

File-type parameters must be uploaded first via POST /upload/video-chroma-key, then the returned filePath is passed to the corresponding file field.

Response format

File result

JSON

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-video-chroma-key": {
      "name": "video-chroma-key",
      "description": "Remove green screen or any colored background from video and replace with another video",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=video-chroma-key",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "video-chroma-key",
    "arguments": {
  "foregroundVideo": "https://example.com/file.ext",
  "backgroundVideo": "https://example.com/file.ext",
  "color": "green",
  "customColor": "0x00FF00",
  "similarity": 0.15,
  "blend": 0.1,
  "outputFormat": "mp4"
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

File parameters accept a public file URL only (https://…). Local paths, data: URIs, and Base64 strings are not supported.

Questions or issues? Contact [email protected]