How do I find my video's fps?

VLC: Tools → Codec Information. mpv: press I. Most file managers show it in properties.

I do not know the subtitle's fps.

Make both 23.976 and 25 versions and keep the one that matches at the end of the video — it is almost always one of those two.

Still slightly off after converting?

Add a shift in seconds with the sync tool. Factor first, shift second.

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Subtitle frame rate converter.

Subtitles made for a 25 fps (PAL) release drift about 2.5 minutes per hour on a 23.976 fps video, and vice versa. Subtitle files carry no frame-rate information, so players cannot fix it. Multiply every time by source fps ÷ target fps and it lines up. If the start is also off, add a shift with the sync tool afterwards.

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Subtitle made for (fps)

Video fps

Factor

×1.04271

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Questions

How do I find my video's fps?: VLC: Tools → Codec Information. mpv: press I. Most file managers show it in properties.
I do not know the subtitle's fps.: Make both 23.976 and 25 versions and keep the one that matches at the end of the video — it is almost always one of those two.
Still slightly off after converting?: Add a shift in seconds with the sync tool. Factor first, shift second.

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