Media
Add hardcoded subtitles to videos using SRT, ASS, or VTT subtitle files with customizable font styling
Call this tool from your code in three languages.
# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/video-subtitle-add' \
-F 'file=@/path/to/videoFile.ext'
curl -X POST 'https://api.elysiatools.com/upload/video-subtitle-add' \
-F 'file=@/path/to/subtitleFile.ext'
# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/video-subtitle-add' \
-F 'videoFile=/path/to/file.ext' \
-F 'subtitleFile=/path/to/file.ext' \
-F 'fontSize=24' \
-F 'fontName=Arial' \
-F 'fontColor=#FFFFFF' \
-F 'bottomAlignment=true' \
-F 'marginBottom=20' \
-F 'outputFormat=mp4'Send a POST request with your inputs as JSON. File parameters require a separate upload first.
POST https://api.elysiatools.com/en/api/tools/video-subtitle-add| Name | Type | Required | Description |
|---|---|---|---|
| videoFile | fileupload required | Yes | — |
| subtitleFile | fileupload required | Yes | — |
| fontSize | range | No | Font size for subtitles (8-72 pixels, ignored for ASS/SSA files) |
| fontName | text | No | Font family name (ignored for ASS/SSA files with embedded fonts) |
| fontColor | color | No | Font color in hex format (ignored for ASS/SSA files) |
| bottomAlignment | checkbox | No | Align subtitles to bottom of screen (uncheck for top alignment) |
| marginBottom | range | No | Distance from bottom edge (0-200 pixels) |
| outputFormat | select | No | — |
File result
{
"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)"
}Add this tool to your Model Context Protocol server so AI agents can list and call it.
Add this block to your MCP client configuration:
{
"mcpServers": {
"elysiatools-video-subtitle-add": {
"name": "video-subtitle-add",
"description": "Add hardcoded subtitles to videos using SRT, ASS, or VTT subtitle files with customizable font styling",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=video-subtitle-add",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}After connecting to the SSE endpoint, list the exposed tools:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Invoke the tool by its id, passing arguments built from its parameters:
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "video-subtitle-add",
"arguments": {
"videoFile": "https://example.com/file.ext",
"subtitleFile": "https://example.com/file.ext",
"fontSize": 24,
"fontName": "Arial",
"fontColor": "#FFFFFF",
"bottomAlignment": true,
"marginBottom": 20,
"outputFormat": "mp4"
}
}
}Questions or issues? Contact [email protected]