How do I cut a video to the beat automatically?

Add your song to the edit in Valmera, make your cuts, then type "cut it to the beat." The agent measures the song's tempo and beat grid, converts the beats into the timeline the viewer watches, and slides each internal cut onto the nearest beat within 0.35 seconds. It reports how many cuts moved and why any were skipped.

Does beat sync work with any song?

Any song with a clear pulse. With no detectable beat it refuses rather than sync to noise, and a weak pulse (confidence under 0.5) is flagged for you to check in the preview. If you can hear the beat, say the tempo ("it's 128 BPM") and it uses yours.

Does it create the cuts or just move them?

It moves them, and never into the middle of a word. To cut on every beat from scratch, ask for a montage on the beat: the agent builds the shots from the beat times first, then aligns them.

Should every cut land on a beat?

Usually not. At 120 BPM that is a new shot every half second, which reads as strobe. Cut the body of the edit every bar or phrase and save every-beat cutting for a short burst at the peak.

Can a cut land a few frames before the beat?

Beat sync puts cuts on the grid; there is no lead or lag setting. Align first, then nudge individual cuts ("pull the cut at 0:14 back three frames"). Don't run beat sync again afterward: a three-frame nudge is inside the tolerance and would snap back.

Do I need to bring my own music?

Yes. Valmera doesn't generate music or include a music library: upload a track, paste a link or name a specific song. For a trending TikTok sound, cut to its beat in Valmera and add the sound in the app.

Is cutting to the beat free?

Creating an account and uploading are free. Editing, including beat sync, requires a subscription — see plans at valmera.io/subscribe.

Cut Video to the Beat Automatically

To cut a video to the beat in Valmera, add your song, make your cuts and type “cut it to the beat.” The AI agent measures the track’s tempo and beat grid, then slides each internal cut onto the nearest beat within 0.35 seconds, skipping any move that would land inside a spoken word.

It moves the cuts you have; it doesn’t invent them. To cut on every beat from scratch, ask for a montage on the beat and the agent first builds the shots from the beat times, then tightens them. If the song has no clear pulse, it says so instead of syncing your cuts to noise.

Put Your Cuts on the Beat

Upload the footage, add your song, type one sentence. Creating an account and uploading are free; editing requires a subscription.

Create an account →

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How to Cut a Video to the Beat in Valmera

1
Upload your footage
MP4, MOV, M4V, MKV or WebM, up to 100 GB and 3 hours. Valmera indexes the words, shots and silences once.
2
Add your song
Upload the track (MP3, WAV, M4A, AAC or OGG, up to 500 MB), paste a link or name the song. Add it before you sync: the beat you cut to is the song the viewer hears, not the footage’s own sound.
3
Make the cuts
“Keep the best moment of each run,” “cut the slow parts,” or “build a montage that cuts every second beat.” Beat sync moves existing cuts, so one uncut take has nothing to align.
4
Ask for beat sync
Type “cut it to the beat.” The agent reports the tempo and its confidence, how many cuts moved, how many were already on the beat, and how many it skipped and why.
5
Review and export
Watch the preview, nudge any cut by hand (“pull the cut at 0:14 back three frames”), add flashes on the beat if you like, then export the MP4 from Studio.

PROMPTS TO PASTE

Cut this to the beat of the music.

It’s 128 BPM. Snap the cuts to that.

Build a montage that cuts on every second beat and lands the drop on the jump at 0:31.

Add a short white flash on every cut.

What Happens to Each Cut

Each internal cut gets one of three outcomes:

How Beat Sync Works

Finding the beat. Valmera turns the song into an onset envelope, which tracks attacks like kicks and snares rather than loudness. Autocorrelating it gives the tempo and a confidence score; the beat grid is then locked to the strongest onsets and nudged toward nearby peaks, so it follows a human drummer without losing the meter.

Using the right clock. Valmera places the song’s beats in program time (where they land in the finished video, including loops and offsets), then moves each junction left to right, recomputing the timeline after every move because each one shifts the cuts after it. Speed changes are converted the same way.

Settings That Matter

Setting	Default	How to change it
Tolerance	0.35 s	“Use a wider tolerance; some cuts didn’t move.”
Beat source	The song in the edit	“Sync to the footage’s own audio” for a live performance or a drum take.
Tempo	Measured from the song	“It’s 128 BPM.” “There’s a beat every second.”
Which cuts move	Every internal cut	The first and last frames of the video never move.
Words	Protected	A move that would land inside a spoken word is skipped.
Removed sections	Protected	A move never closes a gap you cut, so deleted footage can’t come back.

At 120 BPM every cut is within 0.25 seconds of a beat, so the default tolerance accepts every move; below about 86 BPM, some cuts stay put until you widen it.

When Beat Sync Helps, and When It Hurts

Format	What to do
Montage, travel, product reel	Cut on the beat: the body on every bar, every beat only in a short burst at the peak.
Gameplay and sports highlights	Cut on the beat and put the biggest play on the drop.
Talking head, podcast, interview	Don’t. The words are the structure: keep the music as a bed and cut on speech. Beat-synced speech cuts read as a gimmick.
Talking reel with a hype section	Switch rules at the section boundary: speech-led first, beat-led for the hype.

Music is hierarchical: at 120 BPM a beat lands every 0.5 seconds, a bar (four beats in 4/4) every 2 and a phrase (four or eight bars) every 8 or 16. A new shot on every beat reads as strobe, and Valmera’s analysis gives beats rather than bars, so set the hierarchy in words: “cut every fourth beat.”

Land the Drop, Then Add a Flash

The most produced-sounding move is lining up the song’s biggest energy rise with the video’s peak. Valmera’s audio analysis reports where the track’s energy rises most, and the agent offsets the song so the drop hits on your reveal, with the build leading into it.

Then add a flash, a short white pop that peaks on the cut (0.15–0.4 seconds). Flashes land on real scene changes by default; for a montage cut from one continuous recording, ask for “a flash on every cut.” Other styles are on the video transitions page.

When It Doesn’t Sync

“The pulse isn’t clear enough”

Ambient beds, rubato piano and spoken word often have no measurable beat. If you can hear one, state the tempo and the estimate is skipped.

Cuts land at half or double speed

Tempo estimates can be off by an octave (64 vs 128 BPM). State the BPM you know and run it again.

Nothing moved

Read the counts in the reply. “No beat within tolerance” means widen it; “inside a word” on a talking head is the right outcome; “already on the beat” means an earlier pass did it.

Only part of the video synced

The grid exists only where the music plays, and the longest music item sets it. Extend or loop the track to cover every cut.

Limits

Beat sync needs a song with a clear pulse and moves cuts rather than creating them. It finds one tempo and one beat grid, with no bar or downbeat detection, so a song that changes tempo gets a single grid. Cuts land on the beat with no lead or lag setting. You supply the music: Valmera doesn’t generate it or include a library. Transitions are one style per edit, with no true crossfade.

Part of a Music Edit

Start by adding and fitting the music, pick the strongest moments with the highlight reel maker, and see how short-form creators put it together on the TikTok creators page. Tempo analysis, ducking and loudness are documented in audio and music.

Using Claude, ChatGPT or Cursor? The same beat_align_cuts and get_audio_analysis tools are available through Valmera’s MCP server.