callout — Screencast MCP

00:00PARAMETERS

Name	Type	Description
`input` required	`string`	Path to the source video.
`items` required	`object[]`	Boxes, text labels, and arrows, drawn in order (later on top), in video pixels. Each shows from..to seconds (default: whole video); color is a name, #RRGGBB, or name@alpha. at least 1 items, at most 50 items
`items[box].x` required	`number`
`items[box].y` required	`number`
`items[box].width` required	`number`	> 0
`items[box].height` required	`number`	> 0
`items[box].thickness`	`number`	Outline px (default 4). > 0
`items[box].fill`	`boolean`	Fill instead of outline.
`items[box].from`	`number`	≥ 0
`items[box].to`	`number`	> 0
`items[box].color`	`string`
`items[text].x` required	`number`
`items[text].y` required	`number`
`items[text].text` required	`string`
`items[text].size`	`number`	Font size px (default 32). > 0
`items[text].background`	`boolean`	Dark panel behind the text (default true).
`items[text].from`	`number`	≥ 0
`items[text].to`	`number`	> 0
`items[text].color`	`string`
`items[arrow].x1` required	`number`
`items[arrow].y1` required	`number`
`items[arrow].x2` required	`number`	Head (x2,y2) is the point the arrow points at.
`items[arrow].y2` required	`number`
`items[arrow].thickness`	`number`	Shaft px (default 8). > 0
`items[arrow].from`	`number`	≥ 0
`items[arrow].to`	`number`	> 0
`items[arrow].color`	`string`
`fontFile`	`string`	Font: a .ttf/.otf/.ttc path or a C:\Windows\Fonts file name. Default: bundled Inter, with a covering system font for scripts it lacks (CJK, emoji, Arabic, ...).
`output`	`string`	Optional output path. Defaults under SCREENCAST_HOME/edits.
`overwrite`	`boolean`	Allow replacing an existing file at the output path (default false).

00:05A MINIMAL CALL

callout {
  "input": "recording.mp4",
  "items": [
    {
      "type": "box",
      "x": 1,
      "y": 1,
      "width": 1,
      "height": 1
    }
  ]
}

The required arguments only, with placeholder values. Everything else takes its default.

00:10WHAT COMES BACK

Structured content (structuredContent), alongside a text summary:

Field	Type	Description
`outputPath` always	`string`	Path of the file written.

00:15SEEN IN

REC 01Bug-repro clip for a PRstart_recording → find_text → redact_region → trim → callout → export_gif
REC 07The whole edit in one callstart_recording → find_text → pipeline (redact → trim → callout → export_gif)

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