Convert subtitles from 24 to 25 fps
Subtitles timed for true 24 fps material (cinema masters, some digital releases) on a 25 fps PAL video. The speed difference is 4.17 %.
Move subtitles by a fixed amount when every line is off by the same delay.
Seconds (2.5), milliseconds (1500ms) or a time (00:00:02,500). Subtitles appear too early → Later.
For subtitles that drift. Pick two cues far apart and enter when each should appear.
Rescale times when the subtitle was made for a video with a different frame rate.
The file open now is part 1 / language 1.
Cues
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Output preview
What the conversion does
Converting from 24 to 25 fps multiplies every subtitle time by 24 ÷ 25 = 0.960000. The subtitles become earlier by 4.00 % of their time, so the change is zero at the start and largest at the end.
Drift between 24 and 25 fps
| Subtitle time | After conversion | Difference |
|---|---|---|
| 00:10:00 | 00:09:36,000 | −24.0 s |
| 00:30:00 | 00:28:48,000 | −1 min 12 s |
| 00:45:00 | 00:43:12,000 | −1 min 48 s |
| 01:00:00 | 00:57:36,000 | −2 min 24 s |
| 01:30:00 | 01:26:24,000 | −3 min 36 s |
| 02:00:00 | 01:55:12,000 | −4 min 48 s |
A 120-minute film timed at 24 fps runs 4 min 48 s shorter at 25 fps.
How to convert subtitles from 24 to 25 fps
- Open the subtitle file. Drop the subtitle file that drifts on the tool.
- Check the frame rates. “Subtitle made for” is set to 24 fps and “Video plays at” to 25 fps.
- Convert. Click Convert frame rate, then compare a line near the end with the video.
- Save. Download in SRT, VTT, ASS or TXT.
Other frame-rate conversions
Background: why subtitles drift between frame rates. Not sure of the rates? Use two-point sync — it detects the ratio for you.
FAQ
How much do subtitles drift between 24 and 25 fps?
4.00 % of the running time: 24.0 s after 10 minutes and 2 min 24 s after an hour.
What is the conversion factor from 24 to 25 fps?
Every time is multiplied by 24 ÷ 25 = 0.960000. A subtitle at 01:00:00 moves to 00:57:36,000.
How do I know this is the right fix?
If the subtitles are close at the start and the error grows steadily, it is a speed mismatch. If the error is the same everywhere, use Shift instead.