# VoiceLayer

> VoiceLayer is an all-in-one AI video production studio and developer API.
> It combines AI voice cloning, AI clip finding (long-to-short video repurposing), AI auto-editing (silence removal & jump cuts), AI video narration scripting, and animated subtitle generation into a fast, browser-based and API-accessible pipeline.

## Product Capabilities & Features

### 1. AI Voice Cloning & WPS Duration Engine
- **3-Sample Instant Voice Cloning**: Upload 3 clean audio samples to clone any voice profile.
- **Words-Per-Second (WPS) Calibration**: Every voice clone is calibrated with an exact speech velocity rate.
- **Pre-Compile Duration Calculation**: Know the exact millisecond duration of any narration line *before* generating audio, eliminating wasted API credits and trial-and-error re-renders.
- **Landing Page**: https://voicelayer.studio/ai-voice-cloning/

### 2. AI Clip Finder (Long-to-Shorts Video Repurposing)
- **Viral Moment & Hook Detection**: Multimodal AI analyzes long videos (podcasts, webinars, YouTube videos, interviews, streams) to identify high-impact moments, funny reactions, and standalone narratives.
- **Custom Duration Presets**: Extract clips targeted to 15s, 30s, 45s, 60s, or custom ranges (3s–300s).
- **Auto 9:16 Vertical Reframing**: Crops and formats horizontal video into vertical format with integrated animated captions.
- **Landing Page**: https://voicelayer.studio/ai-clip-finder/

### 3. AI Auto-Editor & Smart Silence Remover
- **Automated Jump-Cut Editing**: Detects silent intervals, filler pauses, and dead air, stripping them out instantly.
- **Configurable dB Thresholds & Padding**: Fine-tune volume cut thresholds (-30dB to -60dB) and buffer padding (50ms–500ms) to ensure natural speech cadence without clipping word endings.
- **High Retention Pacing**: Boosts viewer watch time for talking-head videos, tutorials, vlogs, and podcasts.
- **Landing Page**: https://voicelayer.studio/ai-auto-editor/

### 4. AI Narration Agent (Video-to-Script Voiceover)
- **Vision-Powered Video Comprehension**: Multimodal AI inspects video scenes, detects on-screen action, and authors contextual voiceover scripts.
- **Scene-Aware Timestamping**: Automatically spaces narration blocks to match visual transitions and scene changes.
- **One-Click Narration & Subtitle Generation**: Synthesizes cloned voiceovers and generates synchronized subtitles in a single flow.
- **Landing Page**: https://voicelayer.studio/ai-narration-generator/

### 5. Production Desk & Multi-Set Timeline
- **Interactive Multi-Card Timeline**: Compose complex multi-narrator scenes with precise start/end timestamps.
- **Video Ducking**: Automatically ducks/mutes background video audio by 20% during narration marks.
- **Real-Time Visual Preview**: Live canvas preview of custom font choices, color palettes, and coordinate positioning.

### 6. Animated Subtitle & Kinetic Caption Engine
- **ASS Subtitle Renderer**: High-performance subtitle engine supporting kinetic typography.
- **Animation Styles**: Word-by-word pop, karaoke color highlighting, word stack, bounce, fade, and typewriter.
- **Multi-Platform Presets**: Optimized safe-zone layouts for TikTok, YouTube Shorts, and Instagram Reels.
- **Landing Pages**:
  - TikTok Subtitles: https://voicelayer.studio/tiktok-subtitle-generator/
  - YouTube Shorts Subtitles: https://voicelayer.studio/youtube-shorts-caption-generator/
  - Instagram Reels Subtitles: https://voicelayer.studio/instagram-reels-subtitle-generator/
  - Animated Captions: https://voicelayer.studio/animated-captions-generator/
  - General Subtitles: https://voicelayer.studio/ai-subtitle-generator/

---

## Developer REST API

### Base URL
`https://voicelayer.studio/api`

### Authentication
Include your API key in the `X-API-Key` HTTP header:
`X-API-Key: <your_api_key>`

---

### Endpoint 1: Estimate Narration Durations
Calculates the exact duration (in seconds) of text blocks before rendering.

```http
POST https://voicelayer.studio/api/estimate-durations
X-API-Key: <your_api_key>
Content-Type: application/json

{
  "voice_id": "voice_abc123",
  "narrations": [
    { "text": "Welcome to our channel today." }
  ]
}
```

Response:
```json
{
  "durations": [
    { "index": 0, "safe_duration_s": 2.14, "wps": 2.8 }
  ]
}
```

---

### Endpoint 2: Submit Video Compile Job
Renders voiceover audio, burns animated .ASS subtitles, and compiles final MP4 video.

```http
POST https://voicelayer.studio/api/compile
X-API-Key: <your_api_key>
Content-Type: application/json

{
  "video_url": "https://assets.voicelayer.studio/uploads/sample.mp4",
  "mute_where_speech": "true",
  "narrations": [
    {
      "timestamp": "00:02.500",
      "text": "Check out this incredible feature.",
      "font": "Inter",
      "effect": "karaoke",
      "text_color": "#FFFFFF",
      "effect_color": "#38BDF8",
      "aspect_ratio": "9:16",
      "voice_id": "voice_abc123",
      "subtitles": true,
      "x_position": 540,
      "y_position": 1400,
      "size": 1.2
    }
  ]
}
```

Response:
```json
{
  "job_id": "job_98471209384",
  "status": "processing",
  "message": "Compile job queued. Poll GET /api/jobs/job_98471209384 for status."
}
```

---

### Endpoint 3: AI Auto-Editor (Silence Remover)
Cuts pauses and dead air from talking-head videos.

```http
POST https://voicelayer.studio/api/ai-auto-editor
X-API-Key: <your_api_key>
Content-Type: application/json

{
  "video_url": "https://assets.voicelayer.studio/uploads/raw_interview.mp4",
  "db_threshold": -40,
  "min_silence_duration": 0.5,
  "margin_buffer": 0.1
}
```

---

### Endpoint 4: AI Viral Clip Finder
Extracts top-performing short segments from long videos.

```http
POST https://voicelayer.studio/api/ai-clip-finder
X-API-Key: <your_api_key>
Content-Type: application/json

{
  "video_url": "https://assets.voicelayer.studio/uploads/full_podcast.mp4",
  "prompt": "Find the top 3 most exciting debate moments",
  "min_duration": 15,
  "max_duration": 60,
  "max_clips": 3
}
```

---

### Endpoint 5: Poll Job Status & Get CDN Output
Check progress of any background rendering or clipping job.

```http
GET https://voicelayer.studio/api/jobs/job_98471209384
X-API-Key: <your_api_key>
```

Response when done:
```json
{
  "job_id": "job_98471209384",
  "status": "done",
  "video_url": "https://assets.voicelayer.studio/rendered/job_98471209384.mp4"
}
```

> **CDN Note**: All public media URLs use CloudFront CDN domain `https://assets.voicelayer.studio/` for ultra-fast, unauthenticated streaming and downloads.

---

## Direct Links & Sitemap Index

- Main Studio App: https://voicelayer.studio/
- AI Voice Cloning: https://voicelayer.studio/ai-voice-cloning/
- AI Clip Finder: https://voicelayer.studio/ai-clip-finder/
- AI Auto-Editor: https://voicelayer.studio/ai-auto-editor/
- AI Narration Generator: https://voicelayer.studio/ai-narration-generator/
- AI Subtitle Generator: https://voicelayer.studio/ai-subtitle-generator/
- Animated Captions: https://voicelayer.studio/animated-captions-generator/
- TikTok Subtitles: https://voicelayer.studio/tiktok-subtitle-generator/
- YouTube Shorts Captions: https://voicelayer.studio/youtube-shorts-caption-generator/
- Instagram Reels Subtitles: https://voicelayer.studio/instagram-reels-subtitle-generator/
- Full Technical Manifest: https://voicelayer.studio/llms-full.txt
- Sitemap: https://voicelayer.studio/sitemap.xml
- Creator / Company: https://pdvautomations.com (polat@pdvautomations.com)