# Skill: effect/comment-cta — "תגובות: ״תגיבו מילה״" (Comments call to action)

A comments sheet slides up, “comment KEYWORD” slams in, the keyword arrives as a comment and a reply follows.
חלון תגובות עולה, ״תגיבו מילה״ נוחת, המילה מגיעה כתגובה ותשובה מגיעה אחריה.

Category: Overlays & graphics · שכבות וגרפיקה · a real preview: https://media.gpt.org.il/lookbook/effects/comment-cta.mp4?v=mv19exzc
Price: **60 credits per finished minute**: the render itself — 1 credit per second of 1080p output. Combined with captions, a hook or other effects: still one render, nothing more for combining.

Base URL: `https://apihub.co.il` · Auth: `Authorization: Bearer <API key>` · Docs: `/docs` (group "Video Effects")
Send `X-Tag: <job name>` on every call of one video; `GET /v1/usage?tag=<job name>` returns what it cost.
**Files are kept 24 hours** — download the finished video.

---

## 1. On its own — one call

```jsonc
POST /v1/effects/comment-cta             // x-wait-ms: 110000
{
  "video_url": "https://media.gpt.org.il/samples/sample-he.mp4",
  "start": 0.2,
  "duration": 4.7
}
```

A normal render: `status: processing` → poll `GET /v1/executions/{id}` until `completed`, then read `output.url`.
Leave out `video_url` and the effect is drawn on a plain black canvas (9:16 unless `output.aspect_ratio` says otherwise).

When it plays: a stretch: `start` + `duration` (seconds of the finished video), or `at` (a word id) + `duration`, or `during` { from, to } (word ids).

## 2. With captions, a hook and other effects — the same render

```jsonc
POST /v1/studio/edit               // x-wait-ms: 110000
{
  "video_url": "<the video>",
  "language_code": "he",
  "captions": {
    "style": "classic"
  },
  "effects": [
    {
      "id": "comment-cta",
      "start": 0.2,
      "duration": 4.7
    }
  ],
  "audio": {
    "normalize": true
  },
  "output": {
    "aspect_ratio": "9:16",
    "resolution": "1080",
    "fit": "crop",
    "quality": "high"
  }
}
```

`effects` is a list: add more entries for more effects. The engine applies them by pipeline stage (cuts and time →
camera → grade and looks → overlays → text and captions → sound), never by their order in the list. An edit has one
`transition`, one `color` grade, one `music` bed, one `speed` and one caption style: two effects that set the same
one are refused with a message that names them.

## 3. Params

| param | default | range / options | what it does |
|---|---|---|---|
| `keyword` | `"עריכה"` | string | The word to comment |
| `prompt` | `"תגיבו"` | string | The sticker's words before the keyword |
| `reply` | `"שלחתי לך בפרטי"` | string | The reply under the comment ("" = none; emoji show as plain symbols) |
| `user` | `""` | string | The commenter's name ("" = a generic one) |
| `reply_name` | `"אני"` | string | The replier's name |
| `header` | `"תגובות"` | string | The sheet's title |
| `theme` | `"dark"` | `dark` · `light` | The sheet's look |
| `accent` | `"#E11D48"` | string | The keyword's colour |
| `sheet_height` | `52` | 30–80 | The sheet's height, % of the frame |
| `size` | `6` | 3–12 | The sticker's letter size, % of the frame height |
| `sound` | `true` | boolean | A deep hit as the sticker lands |

GET `/v1/effects/comment-cta` returns the same as JSON (with the full body schema). Every field has a default; numbers
outside their range are refused with the field's name.