AutoSub — AI Animated Video Captions

Overview

Over 85% of short-form social videos on TikTok, Instagram Reels, and YouTube Shorts are viewed without sound. Uncaptioned videos experience severe drop-off rates and diminished algorithmic reach. AutoSub is an automated video captioning engine that transforms raw spoken videos into polished, viral-ready clips featuring animated, word-timed subtitles, smart emoji injections, and dynamic kinetic highlights in seconds.

Powered by OpenAI Whisper for acoustic alignment and ChatGPT for semantic keyword emphasis, AutoSub eliminates hours of tedious manual subtitle creation while ensuring pixel-exact synchronization between your preview and final export.

Key Capabilities

1. Word-Level Acoustic Alignment: Millisecond-precision timestamps for every spoken word using Whisper-1.
2. 12 Proven Viral Typography Styles: Hormozi Lime, Bold Impact, Boxed Headline, Cyber Neon, Clean Minimal, Classic Karaoke, and more.
3. Semantic Keyword & Emoji Tagging: Automatically bolds high-impact words and injects contextually relevant emojis.
4. Multi-Format Pro Exports: High-bitrate 1080p/4K MP4 burns alongside raw SRT, VTT, and ASS tracks.
5. Multi-Ratio Aspect Support: Seamless preview and render in 9:16 Vertical, 1:1 Square, and 16:9 Landscape.
6. WYSIWYG Subtitle Engine: Exact font and animation parity powered by FFmpeg libass compiler.

Use Cases

• Short-Form Creators: Turn daily talking-head videos into viral Reels and TikToks in under 30 seconds.
• Performance Marketers: Boost video ad engagement and CTR across muted mobile feeds.
• Podcasters: Extract and repurpose high-retention audio-video soundbites effortlessly.
• Video Agencies: Eliminate tedious manual subtitle keyframing and delivery bottlenecks.