API-Clippers: How I Automated My Viral Video Workflow with AI (No Cap)

POV: You're a content creator (or just a dev with too many ideas) and you're tired of spending hours in Premiere Pro just to crop a 16:9 video into a TikTok-friendly 9:16 format. Oh, and the subtitles? Total vibe killer to do manually.

I decided to fix that. Say hello to API-Clippers — the automated engine that turns long-form content into viral-ready clips while you sleep.

The "Manual Edit" Struggle is Real

If you've ever tried to make a "viral" clip, you know the drill:

1. Find the good part.
2. Crop it to vertical.
3. Add subtitles (and make them look actually good).
4. Add a "Hook" caption at the top.
5. Export, wait, repeat.

It's tedious. It's slow. And it's exactly what AI should be doing for us.

What Does API-Clippers Actually Do?

Basically, it's a FastAPI server that takes a video file and a few timestamps, then spits out a fully edited clip.

• AI Subtitles: Powered by OpenAI Whisper. It transcribes the audio and overlays subtitles with perfect timing.
• Smart 9:16 Cropping: No more black bars. It crops your video for mobile-first platforms like TikTok, Reels, and Shorts.
• Hook Overlays: You can specify a "Hook" (like "Wait for it...") and the engine styles it and slaps it on top.
• Bulk Mode: Need 10 clips from one podcast? Send one bulk request and go grab a coffee.

The Tech Under the Hood

I built this using:

• FastAPI: For the snappy, asynchronous backend.
• MoviePy & FFmpeg: The heavy hitters for video rendering.
• OpenAI Whisper: For the state-of-the-art speech-to-text.
• Pydantic: To keep the data clean and validated.

Show Me the Code (The API Call)

Triggering a clip is literally one JSON request away:

{
  "clip_title": "The Viral Moment",
  "start_timestamp": "02:15",
  "end_timestamp": "02:45",
  "hook_caption": "Mind-blowing 🤯",
  "source_video": "my_video.mp4"
}

The server handles everything else. No UI needed, just pure automation.

What's Next?

This is just the start. I'm looking into adding Face Tracking (so the crop always stays on the speaker) and Auto-Music Overlay.

If you're tired of the manual grind, this is the way. Local AI, local processing, zero fees. Just vibes and viral clips.

Got questions? Or want to see the repo? Drop a comment below. Let's build something cool.