tiktokify - SKILL.md Agent Skill

name: tiktokify description: Transform any video into viral-ready TikTok/Reels format with auto-captions, fast cuts, and vertical cropping compatibility: Created for Zo Computer metadata: author: dioni.zo.computer version: 1.0.0

TikTokify Video Skill

Automatically transforms horizontal videos into viral-ready vertical shorts for TikTok, Reels, and YouTube Shorts.

What It Does

Converts to 9:16 vertical aspect ratio (1080x1920)
Extracts most engaging 15-60 second clips
Adds auto-generated captions (burned in)
Removes silence and dead air
Fast-paced cuts (avg 2-3 seconds per cut)
Optional: Add trending audio, zoom effects
Outputs ready-to-upload MP4

Usage

Basic TikTokify

bun scripts/tiktokify.ts --input video.mp4

Advanced Options

bun scripts/tiktokify.ts \
  --input video.mp4 \
  --duration 30 \
  --add-captions \
  --auto-crop \
  --remove-silence \
  --output viral.mp4

Batch Process

bun scripts/tiktokify.ts --batch /path/to/videos/*.mp4

Parameters

Flag	Description	Default
`--input`	Source video file	Required
`--duration`	Target length (seconds)	30
`--add-captions`	Burn-in auto-generated captions	true
`--auto-crop`	Smart crop to keep subject centered	true
`--remove-silence`	Cut out silent sections	true
`--fast-cuts`	Apply trending fast-cut style	true
`--output`	Output file path	`{input}_tiktok.mp4`

How It Works

Transcription: Uses transcribe_video to get timestamp-aligned text
Scene Detection: FFmpeg analyzes scenes, identifies best moments
Smart Cropping: Detects faces/subjects, crops to keep them centered
Caption Rendering: Burns captions with TikTok-style formatting
Silence Removal: Cuts dead air using audio analysis
Fast Cuts: Speeds up by 1.1-1.3x, removes pauses
Export: Outputs 9:16 MP4 optimized for mobile

Examples

Convert YouTube video to TikTok

# Download YouTube video
yt-dlp "https://youtube.com/watch?v=..." -o input.mp4

# TikTokify it
bun scripts/tiktokify.ts --input input.mp4 --duration 45

Batch process all videos in a folder

bun scripts/tiktokify.ts --batch ~/Videos/raw/*.mp4 --output ~/Videos/tiktok/

Technical Stack

FFmpeg: Video processing, cropping, cutting
Whisper (via transcribe_video): Accurate transcription with timestamps
ImageMagick: Caption rendering with custom fonts
Scene detection: FFmpeg's scene filter for smart cuts

Output Format

Resolution: 1080x1920 (9:16)
Codec: H.264 (best compatibility)
Bitrate: 8 Mbps (high quality, small file)
Audio: AAC 128kbps
Captions: Burned-in, yellow text, black outline

Tips for Best Results

Start with good source: 1080p+ horizontal video works best
Keep subjects centered: Auto-crop works better when subject is in frame
Good audio: Clear speech = better captions
Action-packed: Videos with movement convert better than talking heads
Test durations: Try 15s, 30s, 60s to see what performs

Roadmap

Add trending audio library integration
AI-powered "hook detector" (finds most engaging 3 seconds)
Template system for different niches (fitness, tech, comedy)
Auto-upload to TikTok/Reels via APIs
A/B test multiple versions with different hooks