Takes a video of up to 5 minutes and returns it with a text watermark rendered i
Takes a video of up to 5 minutes and returns it with a text watermark rendered into the picture in DejaVu Sans, at top-left, top-right, bottom-left, bottom-right or centre, with selectable size relative to the picture height and opacity, optionally followed by a running timecode — useful for review copies and drafts. Sound is copied unchanged. Output MP4 (H.264/AAC) inline as base64, max 24 MB. Runs locally with ffmpeg. Billing per started video minute.
Answeringour last check, 2026-10-31
1 of 1checks answered this week
1034 msmedian answer time
$0.008listed price per call
$0.008price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://medien.halowerk.com/v1/video-watermark
| Category | Image and media |
|---|---|
| Provider host | medien.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-31 | valid payment request | 402 | $0.008 | 1034 ms |
Example input (from the provider)
{
"body": {
"duration_minutes": 1,
"position": "top_right",
"source": {
"url": "https://medien.halowerk.com/beispiel/vortrag.mp4"
},
"text": "ENTWURF",
"timecode": true
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"duration_minutes": {
"maximum": 5,
"minimum": 1,
"type": "integer"
},
"opacity": {
"default": 0.6,
"maximum": 1,
"minimum": 0.1,
"type": "number"
},
"position": {
"default": "bottom_right",
"enum": [
"top_left",
"top_right",
"bottom_left",
"bottom_right",
"center"
],
"type": "string"
},
"size_percent": {
"default": 5,
"description": "Text height as percent of the picture height.",
"maximum": 20,
"minimum": 2,
"type": "number"
},
"source": {
"additionalProperties": false,
"properties": {
"content_base64": {
"maxLength": 12000000,
"type": "string"
},
"filename": {
"maxLength": 260,
"type": "string"
},
"url": {
"maxLength": 2048,
"type": "string"
}
},
"type": "object"
},
"text": {
"maxLength": 80,
"minLength": 1,
"type": "string"
},
"timecode": {
"default": false,
"type": "boolean"
}
},
"required": [
"source",
"duration_minutes",
"text"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}