The short answer
Match captions to the final video cut, check wording and important sounds, then review each cue’s start, end and reading time. The local tool checks a plain-text SRT subset and can shift all times equally. It cannot hear the audio, verify meaning, detect drift or certify LinkedIn acceptance. Play the processed version before calling the task finished.
What you’ll take away
- A constant offset fixes a constant displacement, not accumulating timing drift.
- Caption syntax and readable, accurate captions are different checks.
- Keep captions for each language and edit revision distinct.
Begin with the final cut and the intended meaning
Finish timing edits before aligning the caption track. Record which video revision it belongs to, its spoken language and whether the text is a same-language caption or a translation. Do not silently combine captions from an old cut with a newly trimmed opening.
In a constructed example, the speaker says that a comparison does not establish causation. If an automatic draft loses the word “not”, correcting commas does not repair the meaning. Listen while reading, check names and numbers, and include speaker or meaningful sound information when it is needed to follow the content. W3C explains why automatic captions need accuracy review.
Inspect structure before changing the timing
SRT represents numbered text cues with start and end timestamps, separated into blocks. Our checker uses hours:minutes:seconds,milliseconds, emits UTF-8 without a byte-order mark and uses CRLF line endings. The Library of Congress documents that SRT support is widespread but not fully standardized; rendering and encoding support still depend on the destination.
Paste a copy of your own plain-text SRT or explicitly load the constructed example. The checker rejects malformed times, empty text, overlapping or unsorted cues and shifts below zero. Overlap rejection and the exclusion of styling tags are deliberate restrictions of this simple tool, not universal rules for every SRT file. Keep a separate original if your workflow needs richer captions.
Distinguish a fixed offset from drift
Suppose every cue appears 250 milliseconds before the corresponding speech. A positive 250-millisecond shift moves all cues later. Inspect the shifted beginning and end before export. If the first cue is close but the final one is several seconds wrong, a constant shift is not the right repair.
A replaced introduction, removed pause or different-speed export can require realignment of individual cues. Use your caption editor and the final media timeline. Do not stretch times blindly until one selected moment looks correct. The tool does not load a media file and therefore cannot establish the correct shift or whether the track ends within the video.
| Observation | Next check |
|---|---|
| Similar displacement throughout | Try one measured constant shift, then inspect several points |
| Displacement grows through the video | Check cut, playback rate and track revision; realign cues |
| Only one segment is wrong | Review that edit and its nearby cue boundaries |
| Text is correct but unreadably fast | Revise segmentation or the video pace; do not merely hide text |
Use review flags as prompts, not a pass
The tool flags more than 20 Unicode code points per second, more than two lines, or over 42 code points in a line. Spaces count, line breaks do not count in the rate. These are disclosed local screening choices, not measured accessibility thresholds, LinkedIn limits or a guarantee that an unflagged cue is readable.
Review every cue with the video. Keep meaningful phrases together, allow time to read and prevent text from covering essential controls. A long German compound, technical term or unfamiliar name can require attention even below a numerical cutoff. Do not shorten captions until they contradict the audio just to clear a flag.
Export and check the destination track
Download only after inspecting the shifted cue list. Counters are regenerated sequentially; the tool preserves text and internal line breaks. Editing the input clears the checked result so an old export is not presented as the newly edited track. The input stays in the browser; no video, audio or text is uploaded to Wrapped.li.
LinkedIn documents desktop caption-file attachment and currently exposes caption options during video sharing. The older caption help and newer sharing guide describe different labels, so use the actual current controls and verify language availability in your account. Do not assume that an SRT generated here is accepted or that automatic captions cover every language.
After processing, enable the intended track and check the first cue, several transitions and the ending against the final video. Test speech meaning as well as timing. Burned-in captions and a selectable track can overlap, so inspect that combination deliberately. This is a local formatting and review aid, not transcription or a completed LinkedIn publication.
Sources & product references
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