Watermark Video
Burn a text watermark onto every frame of a video with configurable position, size, opacity, and color.
API Endpoint
POST /api/v1/tools/watermark-video
Accepts multipart form data with a video file and a JSON settings field.
Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
| text | string | Yes | - | Watermark text (1-200 characters) |
| position | string | No | "br" | Position on the frame: tl, tc, tr, l, c, r, bl, bc, br |
| fontSize | integer | No | 36 | Font size in pixels (8-120) |
| opacity | number | No | 0.5 | Watermark opacity (0.05-1) |
| color | string | No | "#ffffff" | Hex color for the text (e.g. "#ffffff") |
Position Values
- tl - Top left, tc - Top center, tr - Top right
- l - Middle left, c - Center, r - Middle right
- bl - Bottom left, bc - Bottom center, br - Bottom right
Example Request
bash
curl -X POST http://localhost:1349/api/v1/tools/watermark-video \
-H "Authorization: Bearer si_your-api-key" \
-F "[email protected]" \
-F 'settings={"text": "PREVIEW", "position": "c", "fontSize": 48, "opacity": 0.3}'Example Response
json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/clip.mp4",
"originalSize": 12500000,
"processedSize": 12400000
}Notes
- The watermark is permanently rendered into the video frames and cannot be removed after processing.
- The watermark uses a sans-serif font built into FFmpeg.
- For image watermarks, use the image Watermark tool instead.