How to Sync Video to BPM
The frame-exact way to cut video to the beat — set your tempo once, and every cut lands on the grid. No scrubbing, no counting frames, no drift.
Why sync to BPM instead of 'by ear'?
Cutting by ear works until it doesn't: a few frames of drift across a 2-minute video compounds into visibly off-beat cuts that viewers read as 'amateur' — even when they can't say why. Syncing to BPM (beats per minute) makes every cut land on a mathematically exact musical position, start to finish.
The key distinction from auto beat-detection: BPM sync is deterministic. You tell the system the tempo, and it computes frame-exact cut points. Detection algorithms guess where beats are from the audio signal — and they routinely misfire on type beats (808 subs, pads, synthesized percussion) that lack the sharp transients those algorithms were trained on.
The math (it's simpler than it looks)
One formula drives everything:
secondsPerBeat = 60 / BPM
cutTimestamp[n] = n × secondsPerBeatAt 140 BPM, one beat = 0.4286s, so cuts land at 0.43s, 0.86s, 1.29s, and so on. At 85 BPM (lo-fi), one beat = 0.7059s. To cut on the bar instead of the beat, multiply by 4 (one bar = 4 beats in common time).
| BPM | Seconds / beat | Seconds / bar |
|---|---|---|
| 85 (lo-fi) | 0.706s | 2.824s |
| 120 (house) | 0.500s | 2.000s |
| 140 (trap) | 0.429s | 1.714s |
| 150 (drill) | 0.400s | 1.600s |
The workflow (5 steps)
- Get your exact BPM. If you produced the beat, your DAW shows it. Otherwise tap it out or use a BPM detector.
- Set the BPM in your editor so the timeline grid matches the music.
- Drop clips on the grid. Each clip snaps to beat- or bar-length positions — no manual trimming to hit the beat.
- Preview against the audio. Cuts should feel locked to the kick/snare, not floating near them.
- Export. The render preserves the exact grid positions, so what you previewed is what ships.
In BeatVids this is the default behavior: set BPM, drag clips, every cut is on the grid automatically. No keyframing, no frame-counting. For the full type-beat upload workflow (titles, BeatStars links, free vs Pro), see How to Make Type Beat Videos.
Common Questions
Use the BPM of your beat — the same tempo you produced or that the track was made at. Cutting at the track's real BPM is what makes the edit feel locked to the music. If you want slower cuts, cut on the bar (every 4 beats) instead of every beat; for fast, aggressive edits, cut on the beat or even the half-beat.