Fix captions that drift further out of sync as a video plays, after a frame rate change.
Caption files up to 2 MB: SRT, WebVTT, YouTube SBV or ASS.
Runs in your browser. Nothing is uploaded.
Open or paste a caption file to begin.
Studio times the captions again each time it cuts the video.
The captions match at the start and slip steadily further out, reaching several seconds by the end of a film. That happens when a film made at 24 frames a second is sped up to 25 for European television, or slowed back down, and the captions came from the other version.
If the captions are off by the same amount from start to end, nothing was sped up: use the timing shifter. If you exported your own video at a new frame rate, its length did not change, and the captions still fit. Applying this tool to a file that does not need it will break good timing.
Going from 23.976 to 25 frames a second multiplies every time by 23.976 ÷ 25, about 0.959. A caption at 01:00:00 moves to 00:57:32.
Check the video with the metadata viewer. The caption file's origin is usually in its name or on the site it came from.
Yes. Choose Other frame rates and type both.
Then parts were cut or added. Use the timing shifter from the caption where it goes wrong.
Move captions earlier or later, from one point onward, or stretch them to fix drift.
Fix caption text and timing line by line, with your video playing alongside.
Check a caption file for lines that are too long, too fast, too short or overlapping, and fix them.
See what is inside a media file: codecs, resolution, frame rate, bitrate, and the tags it carries.
Upload the raw recording. Studio cuts the ums, retakes and long pauses, adds captions and makes short clips. 30 free minutes, no card.