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Guides and insights for captioning professionals

Compliance explainers, hands-on training, and broadcast workflow deep-dives from the team that builds Closed Caption Creator.

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What will I find on the Closed Caption Creator blog?

Practical articles on closed captioning, subtitling, and audio description: FCC and EAA compliance explainers, step-by-step workflow tutorials, automation guides, tool comparisons, and product updates. Every post is written by the engineers and captioning specialists who build Closed Caption Creator.

Featured Articles

Featured Post

Drop Frame vs Non-Drop Frame: Why Your Captions Drift

Drop frame skips numbers, not pictures. Why 29.97 and 23.976 both drift 3.6 seconds an hour, and how to tell which mistake you are looking at.

By Nathaniel Deshpande ·

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Information

Closed Captioning for Mobile (9x16) Video

Safe zones, character limits, and workflows for TikTok & YouTube Shorts.

Information

AI-Driven Captioning: ChatBot to MCP Server

How we built TimBot with OpenAI Agents, and our roadmap to an MCP server.

Review

The Best Audio Description Software for Broadcast

Six AD tools compared: scripting, synthetic voice, mixing, and delivery.

Latest Articles

Every guide, review, and product update — filter by topic to find what you need.

Diagram comparing drop frame and non-drop frame timecode labelling across five identical video frames at a minute boundary, showing that only the numbers differ.
TechnicalInformation

Drop Frame vs Non-Drop Frame: Why Your Captions Drift

Drop frame skips numbers, not pictures. Why 29.97 and 23.976 both drift 3.6 seconds an hour, and how the size of the error tells you the cause.

Read Now
Diagram of a TTML document showing the tt root element with namespace declarations, a head section containing styling and layout regions, and a body section containing timed paragraph elements.
TechnicalInformation

What Is a TTML File? TTML, DFXP, and IMSC Explained

How DFXP, SMPTE-TT, EBU-TT-D, and IMSC relate to TTML, why the media time base matters, and what actually fails a streaming delivery.

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Diagram of an SCC file showing the Scenarist_SCC V1.0 header line, a SMPTE timecode, and hexadecimal byte pairs annotated with the control codes they represent.
TechnicalInformation

What Is an SCC File? Inside the Scenarist Closed Caption Format

What the hex byte pairs mean, why odd parity breaks hand-edited files, how the 32 by 15 grid limits placement, and why SCC is 29.97 fps only.

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Diagram of an EBU-STL file showing a 1024-byte GSI block followed by 128-byte TTI blocks, with the Display Standard Code, Disk Format Code, and Character Code Table fields listed below.
TechnicalInformation

EBU-STL and Teletext Subtitles: A Broadcast Delivery Guide

How the GSI and TTI blocks are built, what the Display Standard Code decides, how OP-42 and OP-47 carry teletext, and why control codes change your line length.

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YouTube caption styling title card showing an italic caption line and a yellow caption line in a video player, beside a list marking SRT as unstyled and TTML as supporting styling and positioning.
TechnicalTraining

How to Add Italics, Bold, and Color to YouTube Captions

Why SRT italics never render, which formats YouTube actually styles, and how to export a TTML file that keeps your formatting and positioning.

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Subtitle reading speed title card showing the 20 characters per second limit for adult programming and 17 characters per second for children's programming.
TechnicalInformation

Subtitle Reading Speed: CPS and WPM Limits Explained

Characters per second versus words per minute, the published platform limits, why broadcast has a hard ceiling, and how to fix events that run too fast.

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Audio description requirements title card showing the FCC quotas of 50 and 37.5 hours per quarter and the April 26, 2027 ADA Title II deadline.
InformationCompliance

Audio Description Requirements: The 2026 Compliance Guide

FCC hour quotas and the DMA phase-in, the new ADA Title II and Section 504 deadlines, WCAG levels, and how described audio is delivered.

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FCC closed captioning requirements title card listing the four quality standards and the August 17, 2026 caption display settings deadline.
InformationCompliance

FCC Closed Captioning Requirements: The 2026 Compliance Guide

The four FCC caption quality standards, the thirteen exemptions, streaming rules under the CVAA, and what changes on August 17, 2026.

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person holding a phone near cliff during daytime
Information

Closed Captioning for Mobile (9x16) Video

Best practices for 9x16 vertical video captioning. Learn safe zones, character limits, and workflows for TikTok & YouTube Shorts using Closed Caption Creator.

Read Now
A diagram of an AI captioning chatbot workflow, from media input through transcription to caption file delivery
Information

AI-Driven Captioning: ChatBot to MCP Server Implementation

How we built TimBot using OpenAI Agents for caption conversion and our roadmap to develop an MCP server enabling agentic automation in media workflows.

Read Now
Screenshot showing the extended AD Workspace in Closed Caption Creator.
InformationTraining

How To | Extended Audio Description (EAD)

Create Extended Audio Description with Closed Caption Creator and Premiere Pro. Step-by-step guide for accessible educational and corporate video content.

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landscape photography of white box van
TrainingTechnical

Automate Your Closed Caption Workflows - Pt. 3

Three-part series covering Closed Caption Converter automation: clean JSON profiles, frame-accurate segment timing, and Postman API integration for professional caption workflows.

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flat screen monitor
TrainingTechnical

Automate Your Closed Caption Workflows - Pt. 2

Master precise segment timing control in Closed Caption Converter. Extract manifest data to create frame-accurate caption conversions with custom break durations for professional delivery specs.

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The Closed Caption Converter interface showing a batch of caption files queued for conversion
TrainingTechnical

Automate Your Closed Caption Workflows - Pt. 1

Learn to create clean JSON configurations for Closed Caption Converter CLI and API workflows. Streamline caption conversion with clean, maintainable profiles instead of bloated auto-generated configs.

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Illustration for the article "How to Closed Caption Video | A Complete Guide"
Training

How to Closed Caption Video | A Complete Guide

Master closed captioning with Closed Caption Creator. Step-by-step tutorial covers transcription, timing, QC & export for broadcast, web & streaming video.

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Screenshot of the updated Closed Caption Creator interface showing the video preview on the left, and caption editor list on the right.
Technical

Closed Caption Creator: Easy Subtitle Editor Integration

Integrate a professional subtitle editor into your existing workflow with Closed Caption Creator. Explore API integrations, iFrame Embed options, Iconik MAM connector, and custom solutions for broadcasters and video platforms. Simplify captioning without system overhaul.

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Woman holding camera standing near people
Information

EU Accessibility Act 2025: Video Compliance Guide for Business

Complete guide to EU Accessibility Act 2025 video compliance. Learn requirements, deadlines, penalties, and how to make your video content accessible for business success.

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Avid Media Composer, showing a timeline used for closed caption conform work
Information

Avid AAF Export For Media Composer

Export AAF files with embedded closed captioning (608/708) for Avid Media Composer and Media Central. Support for multiple languages, and advanced formatting.

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black laptop computer on brown wooden table
Information

Audio Description With Control Track

Easily create broadcast-ready audio descriptions with control tracks using Closed Caption Creator and Emotion Systems’ Engine Desktop.

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Closed Caption Creator release announcement graphic
InformationTechnical

Build vs. Buy | Subtitle Editor

Explore the hidden complexities and costs of building your own web-based subtitle editor. Learn how Closed Caption Creator's IFrame integration offers a powerful, cost-effective alternative for professional captioning.

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Screenshot of the updated Closed Caption Creator interface showing the video preview on the left, and caption editor list on the right.
Review

The Best Closed Caption & Subtitle Editors for Broadcast in 2026

Seven broadcast caption editors compared for 2026: platform support, format coverage, frame accuracy, QC, and which ones survive a delivery spec review.

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Illustration for the article "The Best Media & Video APIs for Broadcast"
Review

The Best Media & Video APIs for Broadcast

Discover the top media and video APIs for broadcast developers, including transcode APIs, closed caption tools, and automatic transcription solutions.

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Illustration for the article
Information

Closed Captioning & Subtitle QC & Review | Best Practices

Ensure the highest quality closed captions for broadcast with these best practices for QC. Learn expert tips and techniques for error-free captions.

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Illustration for the article "How to Conform Closed Captioning for Netflix"
TrainingTechnical

How to Conform Closed Captioning for Netflix

Meet Netflix's strict closed captioning requirements with ease. Learn the guidelines and best practices for delivering compliant captions.

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Illustration for the article "The Best Audio Description Software for Broadcast in 2026"
Review

The Best Audio Description Software for Broadcast in 2026

Six audio description tools compared for 2026: scripting, synthetic voice, mixing, and which ones deliver the WAV and ESEF files broadcasters actually ask for.

Read Now
Illustration for the article "Subtitle Translation - How to Translate Video Subtitles for Broadcast"
Training

Subtitle Translation - How to Translate Video Subtitles for Broadcast

Learn the ins and outs of video subtitle translation for broadcast. Reach global audiences with accurate, culturally-appropriate translations.

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A Closed Caption Converter release announcement graphic
Review

The Best Closed Caption & Subtitle File Converters in 2026

Six caption and subtitle file converters compared for 2026, with format coverage, frame rate handling, and which ones are safe for broadcast delivery.

Read Now
Illustration for the article "Closed Captions vs Subtitles vs SDH: The Differences Explained"
Information

Closed Captions vs Subtitles vs SDH: The Differences Explained

Closed captions, subtitles, SDH, and open captions are four different things. Here is what separates them and which one your delivery spec requires.

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The QC and Review panel in Closed Caption Creator flagging caption errors, including events that exceed two lines and 32 characters per line
Training

How to QC Closed Captions & Subtitles: A 2026 Checklist

A practical QC checklist for caption and subtitle files: the technical checks, the readability limits that cause rejections, and how to automate validation.

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Illustration for the article "How To Embed 608/708 Closed Captioning for Broadcast"
TrainingTechnical

How To Embed 608/708 Closed Captioning for Broadcast

How CTA-608 and CTA-708 captions are carried in MXF, MOV, and MP4, which tools embed them, and why ATSC 3.0 delivery uses IMSC instead.

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Three-Part Series

Automate Your Closed Caption Workflows

Move from manual caption conversion to a fully automated pipeline with Closed Caption Converter — from clean JSON profiles to frame-accurate segmentation and API testing.

  1. Part 1 Getting Started with Clean JSON Profiles Create clean, maintainable configurations for Closed Caption Converter CLI and API workflows.
  2. Part 2 Segmentation and Conform Extract manifest data to create frame-accurate caption conversions with custom break durations.
  3. Part 3 API Testing with Postman Integrate the Conversion API into professional caption workflows and test it with Postman.
Additional resources · Free course

Closed Caption Creator For New Users

Learn how to create closed captioning and subtitles using Closed Caption Creator. Watch our comprehensive 4-part video course, where you'll learn the ins and outs of transcription, timing (spotting), and delivering accurate closed captions.

Watch Now 
A video tutorial thumbnail for Closed Caption Creator