Aspect Pad

Add solid-color letterbox or pillarbox bars to fit a video into a target aspect ratio without cropping.

API Endpoint

POST /api/v1/tools/aspect-pad

Accepts multipart form data with a video file and a JSON settings field.

Parameters

Parameter	Type	Required	Default	Description
target	string	No	"9:16"	Target aspect ratio: 16:9, 9:16, 1:1, 4:3, 3:4
color	string	No	"#000000"	Hex color for the padding bars (e.g. "#000000" for black)

Example Request

curl -X POST http://localhost:1349/api/v1/tools/aspect-pad \
  -H "Authorization: Bearer si_your-api-key" \
  -F "[email protected]" \
  -F 'settings={"target": "1:1", "color": "#ffffff"}'

Example Response

{
  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/clip.mp4",
  "originalSize": 12500000,
  "processedSize": 13200000
}

Notes

• If the video already matches the target aspect ratio, the file is returned unchanged.
• Use 9:16 for vertical/portrait social media formats (TikTok, Reels, Shorts).
• For blurred padding instead of solid color, use the Blur Pad tool.