How to convert subtitles to a new frame rate
Add your file
Choose the SRT or VTT file that was timed for the old frame rate.
Choose the rates
In From, pick the frame rate that the subtitles were made for. In To, pick the frame rate of your video. The line under the lists shows how far the times move.
Download
Click Convert frame rate, then click Download. Play the video to check the last subtitle.
When to use Frame rate converter
- A 23.976 fps film was sped up to 25 fps for PAL television and your subtitles are for the original.
- You have subtitles for a 25 fps Blu-ray release and a video file at 23.976 fps.
- A broadcaster asks for 25 fps deliverables and your subtitle file is timed for 29.97 fps.
- The subtitles fit the start of the video and fall behind later, and you know the source frame rate.
- You re-encoded a disc to a new frame rate and its subtitles no longer match.
More free subtitle tools
Timing
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Common questions
How do I convert subtitles from 23.976 to 25 fps?
Pick 23.976 in From and 25 in To, then click Convert frame rate. Every time becomes about 4.1% earlier.
Do SRT files have a frame rate?
No. SRT times use hours, minutes, seconds, and milliseconds. The frame rate matters only when the video speed changes, because the times then need a new scale.
How do I find the frame rate of my video?
Open the file in a media player and look at the file details. A tool such as MediaInfo also shows it. Use the video frame rate that it reports.
What is a PAL speedup?
A film at 24 or 23.976 fps is played at 25 fps for PAL television. The film runs about 4% faster and ends sooner. Subtitles made for the original need new times to match.
Why does 29.97 to 30 change the times so little?
The two rates differ by about 0.1%. Over a two-hour film that is roughly 7 seconds by the end.
What if I do not know the frame rates?
Use Fix drifting subtitles. You give it the correct start of two subtitles, and it works out the change for you.
Is my file uploaded?
No. The tool runs in your browser. Your subtitle file never leaves your computer.
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