Convert subtitles from 25 to 24 fps
PAL subtitles used with a 24 fps video, for example a cinema DCP-derived file or some festival and digital copies.
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
Save options
Output preview
What the conversion does
Converting from 25 to 24 fps multiplies every subtitle time by 25 ÷ 24 = 1.041667. The subtitles become later by 4.17 % of their time, so the change is zero at the start and largest at the end.
Drift between 25 and 24 fps
| Subtitle time | After conversion | Difference |
|---|---|---|
| 00:10:00 | 00:10:25,000 | +25.0 s |
| 00:30:00 | 00:31:15,000 | +1 min 15 s |
| 00:45:00 | 00:46:52,500 | +1 min 53 s |
| 01:00:00 | 01:02:30,000 | +2 min 30 s |
| 01:30:00 | 01:33:45,000 | +3 min 45 s |
| 02:00:00 | 02:05:00,000 | +5 min 0 s |
A 120-minute film timed at 25 fps runs 5 min 0 s longer at 24 fps.
How to convert subtitles from 25 to 24 fps
- Open the subtitle file. Drop the subtitle file that drifts on the tool.
- Check the frame rates. “Subtitle made for” is set to 25 fps and “Video plays at” to 24 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 25 and 24 fps?
4.17 % of the running time: 25.0 s after 10 minutes and 2 min 30 s after an hour.
What is the conversion factor from 25 to 24 fps?
Every time is multiplied by 25 ÷ 24 = 1.041667. A subtitle at 01:00:00 moves to 01:02:30,000.
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.