SkillsLib.ai

Live Caption Formatter

Format and verify live captions for broadcast and streaming compliance

3.5(4 reviews)
100+ downloads
Updated Nov 2026

What You Can Do

This skill formats raw captions with speaker identification, precise timing, and platform-specific requirements for compliance. You can verify captions meet accessibility standards (WCAG 2.1, CEA-708) and broadcast regulations for major platforms like YouTube Live, Twitch, and Facebook Live. It automatically corrects timing drift, validates speaker labels, and ensures compliance verification before you go live.

Features

Speaker ID Assignment

Automatically tag and format speaker identifications in captions for clarity and accessibility

Timing Validation

Detect and correct timing sync issues, drift, and overlap problems between video and captions

Platform-Specific Standards

Generate output formatted for YouTube Live, Twitch, Facebook Live, and other major streaming platforms

Accessibility Compliance

Verify captions meet WCAG 2.1, CEA-708, and broadcast accessibility requirements automatically

Caption Formatting

Enforce line breaks, character limits, and layout rules specific to each platform's requirements

Quality Checking

Flag common errors including spelling mistakes, sync issues, speaker inconsistencies, and formatting violations

Format Export

Output captions in SRT, VTT, JSON, or platform-native formats ready for immediate use

Example Output

Formatted Caption Output (YouTube Live)

code
00:00:15,000 --> 00:00:20,500
[SPEAKER: Host] Welcome to today's live
stream. Thanks for joining us.

00:00:20,500 --> 00:00:25,200
[SPEAKER: Guest] Thanks for having me.
I'm excited to be here today.

00:00:25,200 --> 00:00:30,800
[SPEAKER: Host] Let's dive into the
main topic we're discussing.

Compliance Report

  • ✅ Timing sync: Valid (no drift detected)
  • ✅ Speaker labels: Consistent formatting
  • ✅ Character limits: 42 chars/line (within YouTube limits)
  • ✅ Accessibility: WCAG 2.1 Level AA compliant
  • ⚠️ Suggestion: Add sound effect description at 00:15,200 [SOUND: Notification ping]

What's Included

  • Caption Formatter: Core engine that processes raw captions and applies formatting rules
  • Compliance Checker: Validates captions against WCAG 2.1, CEA-708, and platform-specific standards
  • Platform Adapters: Converts captions to YouTube, Twitch, Facebook Live, and other platform formats
  • Timing Validator: Detects and corrects timing synchronization issues and overlaps
  • Batch Processor: Process multiple caption files and archive captions in a single operation

Who It's For

  • Live streaming producers
  • Broadcast engineers and technical directors
  • Video accessibility specialists
  • Content creators and streamers
  • Live event coordinators

Best For

  • Preparing captions for YouTube Live broadcasts
  • Verifying accessibility compliance before streaming
  • Converting between caption file formats (SRT, VTT, JSON)
  • Formatting team-generated raw captions for quality assurance
  • Batch-processing archived caption files for regulatory compliance

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