Subtitles two seconds late, or perfect at the start and a minute off by the credits? The first needs an offset, the second a frame-rate correction. Load the file, nudge the timing with the +/- buttons until a line matches the speaker's lips, and save a corrected copy in the same format or a different one.
When to use this
Reach for it when: downloaded subtitles belong to a release with a longer intro, a video was trimmed after captioning, subtitles made for a 23.976 fps Blu-ray are used with a 25 fps PAL copy, or a client's caption file needs a fixed delay added before delivery.
Frequently Asked Questions
How do I know how much to shift?
Pause on a line of dialogue near the start, note the time the speaker begins and compare it with that cue's start time. The difference is your offset. Positive delays the subtitles, negative brings them forward.
Why do my subtitles drift further out of sync over time?
That is a frame-rate mismatch, not an offset. Subtitles made for 23.976 fps lag further and further behind a 25 fps video. Set 'Timed for' to 23.976 and 'Your video' to 25 to rescale every cue.
Will shifting overwrite my original file?
No. Your original stays as it is; you download a new corrected file. The shift happens in your browser and nothing is uploaded.
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