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AI agent for video editors

Caption Accuracy Agent

A caption file that is accurate, in sync and within reading speed rules

Caption Accuracy Agent: what goes in, what the agent does and what you get

What it does

Automatic captions save time but are rarely right on the first pass, and errors on names and products look bad to clients. When picture is locked, this agent generates captions from the final audio, then checks every line. It compares names, brands and technical terms against the word list you keep for each client. It checks timing against the audio and measures line length and reading speed against your rules. It fixes what it can, such as correcting spellings, splitting long lines at a natural pause or nudging timing, and rechecks after each round. Anything that needs a human ear goes to the editor. Before export, it checks the file against the delivery format rules. The editor reviews flagged lines and approves the file. Edge case: when two people talk over each other, it marks that section for manual review instead of guessing.

How it works

Follow the arrows from top to bottom. The orange dashed arrow is the loop: when a check fails, the agent goes back and tries again.

Start and resultWhat it doesA check on its own workWaits for your OKGoes back and retries
Yes, continueApprovedYes, continueApprovedNoNo 1 STARTS WHEN Picture is locked 2 USES A TOOL Generate captions from the final audio 3 DOES Check names and terms against the client word list 4 DOES Check timing, line length and reading speed 5 CHECKS THE RESULT Does every caption pass all checks? If not: fix spelling, split lines or shift timing, thenmark the rest for manual review. Back to step 3. 6 YOU APPROVE Editor reviews flagged lines 7 CHECKS THE RESULT Does the file meet the delivery format rules? If not: rewrap lines or convert the format. Back to step5. 8 YOU APPROVE Editor approves the final file 9 RESULT Caption file exported in the delivery format
Read the steps as a list
  1. Picture is locked
  2. Generate captions from the final audio
  3. Check names and terms against the client word list
  4. Check timing, line length and reading speed
  5. Does every caption pass all checks?If not: fix spelling, split lines or shift timing, then mark the rest for manual review. Back to step 3.
  6. Editor reviews flagged linesThe agent waits here for your OK.
  7. Does the file meet the delivery format rules?If not: rewrap lines or convert the format. Back to step 5.
  8. Editor approves the final fileThe agent waits here for your OK.
  9. Caption file exported in the delivery format

How it decides

A caption passes when the words match the audio, start and end times are within tolerance, and reading speed is under the limit. Overlapping speech always goes to a person.

  • Use the client word list as the spelling source
  • Split any line over the length limit at a natural pause
  • Send overlapping speech to manual review

Make it yours

Every agent is a starting point. You choose these settings for your own situation.

  • Reading speed limit (default 17 characters per second)
  • Maximum characters per line (default 42)
  • Client word lists
  • Export formats such as SRT or VTT

What keeps you in control

It always asks you first

  • Final caption file before delivery

Hard limits

  • Never changes what a speaker said
  • Never delivers captions without approval

It stops when

  • Done: caption file approved and exported
  • Stop: audio too unclear to caption; ask for the script

Set it up

We guide you through the set-up, step by step

Members get the full set-up guide for this agent. No technical skills needed: you copy, paste and upload.

10 minto set it up in your AI
5 AIsChatGPT, Claude, Copilot, Gemini, Grok
  • One set of instructions to paste into your AI, with the clicks for ChatGPT, Claude, Microsoft 365 Copilot, Gemini and Grok
  • The agent then walks you through connecting your own data, one source at a time
  • A downloadable copy with the flow chart, the rules and the full guide
Get access to this agent

An example run

What happensA 12-minute training video produced 214 captions. Nine had the product name Velorin misspelled and 14 ran above 20 characters per second. The agent fixed the names and split the fast lines. The recheck flagged one overlap at 07:42 for the editor. The format check then failed on line breaks for the client's player, so it rewrapped them. The editor approved.

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