# AI Video Thumbnail Generator - Vertical 9:16 Shorts

**Use case:** 

Generate dramatic vertical 9:16 thumbnails from a topic and custom prompt. Returns ready-to-use thumbnail image URLs for Shorts, Reels, and TikTok.

## Input

```json
{
  "videoFileUrl": [],
  "referenceImage": [],
  "mainTopic": "Epic Mountain Hiking Adventure Vlog",
  "numberOfImages": 2,
  "customPrompt": "Dramatic outdoor scenery thumbnail, high energy",
  "aspectRatio": "9:16"
}
```

## Output

```json
{
  "thumbnailUrl": {
    "label": "Thumbnail URL",
    "format": "link"
  },
  "thumbnailPreview": {
    "label": "Thumbnail Preview",
    "format": "image"
  },
  "aspectRatio": {
    "label": "Aspect Ratio",
    "format": "text"
  },
  "timestamp": {
    "label": "Generated At",
    "format": "datetime"
  }
}
```

## About this Actor

This example demonstrates how to use [Auto Video Thumbnail Generator](https://apify.com/parseforge/auto-video-thumbnail-generator) with a specific input configuration. Visit the [Actor detail page](https://apify.com/parseforge/auto-video-thumbnail-generator) to learn more, explore other use cases, and run it yourself.