Measure the Timing Gap or Overlap Between Two Subtitle Cues

How to Use This Tool

Subtract one cue end from the next cue start before merging or translating captions. Calculate the timing gap or overlap between adjacent subtitle cues with editable frame and synchronization adjustments.

The failure Subtitle Gap Check is designed to catch

A negative result is an overlap, while a tiny positive gap can still render like continuous text at common frame rates. The boundary is the job stated in Measure the Timing Gap or Overlap Between Two Subtitle Cues; Subtitle Gap Check is not intended to score or transform a different workflow.

The Subtitle Gap Check input contract

The fields used for this specific operation are Current cue end seconds, Next cue start seconds, Frame adjustment seconds, Sync offset seconds. Keep the source values beside the Subtitle Gap Check result, because replacing the original would remove the evidence needed to reproduce or reverse the operation.

• For Subtitle Gap Check, Current cue end seconds starts at 58 in the worked case; replace that example with the matching source value.
• For Subtitle Gap Check, Next cue start seconds starts at 60 in the worked case; replace that example with the matching source value.
• For Subtitle Gap Check, Frame adjustment seconds starts at 0 in the worked case; replace that example with the matching source value.
• For Subtitle Gap Check, Sync offset seconds starts at 0 in the worked case; replace that example with the matching source value.

Worked result for Subtitle Gap Check

The executable case called Default decision scenario expects out: 2.0. Verify that observation before entering real material, and then change one Subtitle Gap Check field at a time so an unexpected direction or formatting change can be traced to a specific input.

Reading the Subtitle Gap Check output

It combines current cue end seconds, next cue start seconds, frame adjustment seconds and sync offset seconds into one decision result using the formula explained on the page. Apply that answer only when Current cue end seconds, Next cue start seconds, Frame adjustment seconds, Sync offset seconds describe the same scope and format as the worked operation. If the source uses different units, quoting, nesting, timing or account rules, a plausible-looking Subtitle Gap Check output is not sufficient validation.

Assumptions attached to Subtitle Gap Check

• Subtitle Gap Check assumes that all inputs describe the same unit or reporting period unless the field explicitly says otherwise.
• Subtitle Gap Check assumes that the model includes only the four visible inputs and does not infer hidden platform charges.

If one of these Subtitle Gap Check assumptions is false, keep the result as a diagnostic rather than production or decision data, and choose an implementation that explicitly supports the missing rule.

Evidence maintained for Subtitle Gap Check

The recorded reference is YouTube Help — creator resources. Reopen that source when the definition, format, fee or policy behind Subtitle Gap Check changes; private configuration and downstream acceptance still have to be checked in the user's own system.

Where Subtitle Gap Check runs

The named operation executes in browser JavaScript without an ecech calculation API. For Subtitle Gap Check, local execution reduces transmission but does not control browser extensions, device security or the destination where the result is pasted, so sensitive inputs still require the user's normal handling rules.