In short: most pop music has 4 beats per bar and 8-bar phrases. Cut every 2 or 4 beats for most edits, faster in high-energy sections, and save your best shot for the moment the chorus or drop begins.
Beats, bars and phrases
- Beat — the pulse you tap your foot to. Tempo is measured in beats per minute (BPM); most pop sits between 90 and 130.
- Bar — a group of beats, almost always 4 in popular music. The first beat of a bar (the "downbeat") feels strongest.
- Phrase — usually 4 or 8 bars. Songs change section (verse → chorus) at phrase boundaries.
At 120 BPM a beat lasts 0.5 s, a bar 2 s and an 8-bar phrase 16 s. Knowing this lets you plan: a 30-second video at 120 BPM is roughly two phrases.
How beat detection works
VDOAPP analyses the song in your browser in three steps:
- Onsets. It builds an "onset envelope" — a curve that jumps wherever loudness or high-frequency energy suddenly rises, which is where drum hits and notes begin.
- Tempo. It compares that curve with delayed copies of itself (autocorrelation) to find the repeating interval, searching between 70 and 180 BPM and gently preferring tempos near 120.
- Grid. It fits a beat grid at that tempo and snaps each beat to the nearest actual hit, so beats follow the drummer rather than a metronome.
This works reliably for music with a clear drum pattern. Songs with a free tempo, long ambient intros or tempo changes are harder — check the yellow beat marks against what you hear.
Choosing the cutting pace
| Cut every | Feels | Good for |
|---|---|---|
| 1 beat | Frantic, exciting | Drops, sports peaks, short bursts only |
| 2 beats | Energetic, rhythmic | Travel, events, most montages |
| 4 beats (1 bar) | Relaxed, flowing | Emotional pieces, weddings, slideshows |
| 8+ beats | Contemplative | Landscapes, slow intros |
The best edits vary the pace: every 4 beats in the verse, every 2 in the pre-chorus build, every beat for a few seconds at the drop, then back to 4.
Follow the song's structure
- Start on a downbeat. Your first cut after the intro should land on beat 1 of a bar.
- Change scene with the song. A new location or time of day at a new section makes the edit feel composed.
- Save your hero shot for the drop — the moment the chorus or main hook arrives.
- End with the music. Set the music's Length and Fade out so it finishes with the picture, ideally at the end of a phrase.
Step by step
- Rough-cut your clips in order, each a bit longer than needed.
- Add music in the Audio tab; use Song starts from to skip a long intro.
- In the AI tab, press Find beats. Beats appear as yellow marks on the music track, and the magnet (🧲) snaps edits to them.
- Choose Every 2 beats (or another pace) and press Snap cuts to the beat.
- For varied pacing, snap once, then adjust specific sections by hand — dragging trims snaps to beat marks.
Polish
- Movement on the beat: the Beat pulse effect in the Filter tab adds a subtle zoom pulse; use it on one section, not the whole video.
- Transitions: Zoom punch, Whip pan and Flash land well on strong beats. Keep them short (0.2–0.4 s) so the cut still reads as on-beat.
- Speed curves: Flash in or Ramp up into the drop builds anticipation.
- Hide cuts in motion: cutting during a movement (a turn, a door closing) feels smoother than cutting on a still moment.
Frequently asked questions
The detected tempo is double or half the real one. Is that a problem?
Not usually — cutting "every 2 beats" at double tempo is the same as every beat at the real tempo. Just pick the pace that looks right.
Why didn't every cut move?
A video clip can't be extended beyond its footage. If the next beat is too far away, that cut stays put. Trim less off that clip or choose a faster pace.
Can I use copyrighted songs?
The editor will work with any audio, but publishing a video with a commercial song may be blocked or muted by the platform. Use licensed or royalty-free music for anything public.