How to Check AI Captions After Splitting a Recording

Short answer

Track each excerpt’s position in the original recording before you generate captions. Correct words can still appear at the wrong time when separately transcribed clips are combined. Review the final timeline, not only the individual exports.

Download the public caption join checklist. This is a proposed workflow, not a benchmark result or a guarantee of accessibility compliance.

1. Keep the original timeline

Preserve an unchanged original recording. Create a simple log with clip filename, original start time, original end time and any overlap. Use a consistent time format. Do not rely on filenames alone to reconstruct the sequence later.

Choose split points during pauses when practical. Cutting inside a word or a sentence can remove context from recognition and make the join hard to inspect. If you add an overlap for context, record it so it does not become duplicated speech in the final captions.

2. Choose limits before preparing clips

The WhisperWeb website documents 200 MB and 20 minutes per file, with editable timing and subtitle exports. Other tools have their own limits. Check the selected tool before splitting, including whether the actual file encoding is supported.

Process a short excerpt first. Keep the spoken language and output settings consistent across clips unless the source needs a deliberate change. A website’s display language is not necessarily its recognition-language setting.

3. Apply offsets once

If a clip begins at ten minutes in the original, a caption at five seconds within that clip belongs at ten minutes and five seconds in the combined timeline. Add the original start offset to both the start and end of each caption.

Check your editor’s import behavior before manually changing timestamps. Some workflows position a subtitle track on import; others expect absolute times in the file. Applying both methods can shift the captions twice. Use a clearly recognizable line as an anchor to verify the chosen method.

4. Inspect every join

Listen before and after each split. Look for repeated captions, missing phrases, backward timestamps and a caption that remains visible into the next speaker’s turn. Keep overlap handling explicit rather than deleting anything that merely looks repetitive.

If your preparation removed silence or changed playback speed, a simple fixed offset may no longer be enough. Return to the actual edited media timeline and verify alignment there. Preserve a note of the edit so another person can reproduce it.

5. Check content and timing together

Replay names, amounts, negations and corrections against the audio. Confirm that a caption does not reveal a later statement too early or remain after it is spoken. Review readable line breaks at the viewing size your audience will use.

Include the final line in the check. Small timing errors can accumulate or remain unnoticed near the end when only the opening is inspected. If there is uncertainty in the words, mark it for review rather than inventing a confident replacement.

6. Verify in the destination

Import the finished SRT or VTT into the actual player or publishing platform. Check the opening, each join and the final minute. Save the approved subtitle file with the media version it matches; replacing the video can invalidate an otherwise correct caption file.

Our WhisperWeb review explains the documented tool limits. Use the checklist without signup, and keep the recording until a reviewer confirms the final export.