Speed ramp. Fast, then slow motion, on your own clip, free.

Drop in a clip, pick a ramp, and it comes back retimed in your chat. It runs on Treza's FFmpeg node, which costs nothing.

The manta ray rushing in at double speed, gliding in slow motion over the reef, then rushing on — Speed ramp. Double speed, slow motion on the moment, then fast again.FFmpeg node

Look

Free. It lands in your chat.

Everything on this page was made on Treza. See pricing

The same ramps on other footage

Each one is the FFmpeg node's own output, from the same command the button sends.

A car on a neon street in the rain, rushing forward, slowing to a glide, then rushing again — Speed ramp on a drive
The rush, the hang, the rush.
FFmpeg node

Coffee pouring from a pot into a cup in warm light, easing into slow motion as it fills — Ramp to slow motion on a pour
Real time, then every drop.
FFmpeg node

Waves rolling up a beach at sunset, sped up to twice the speed — Double speed on the tide
Six seconds of waves in three.
FFmpeg node

How it works

01
Drop in a clip
Any video from a phone or a camera. No footage? Switch to "Make it for me" and write one line about the shot.
02
Pick a ramp
Speed ramp, ramp to slow motion or double speed. Every clip on this page is real output of the command your file gets.
03
Sign in and it runs
Google sign-in, then the retimed clip appears in your chat, usually within a couple of minutes. Free: the FFmpeg node costs nothing.

What the button sends

Each option is one FFmpeg filter chain, run by Treza's FFmpeg node on your file: a setpts curve that sets the speed second by second, blended to an even 30 frames a second.

Speed ramp: setpts=PTS-STARTPTS,setpts='(if(lt(T,1.6),0.5*T,if(lt(T,2.2),0.8+0.5*(T-1.6)+1.25*(T-1.6)*(T-1.6),if(lt(T,3.8),1.55+2*(T-2.2),if(lt(T,4.4),4.75+2*(T-3.8)-1.25*(T-3.8)*(T-3.8),5.5+0.5*(T-4.4))))))/TB',framerate=fps=30
Sound: left out (-an)
Ramp to slow motion: setpts=PTS-STARTPTS,setpts='(if(lt(T,2),1*T,if(lt(T,2.6),2+1*(T-2)+0.8333*(T-2)*(T-2),2.9+2*(T-2.6))))/TB',framerate=fps=30
Sound: left out (-an)
Double speed: setpts=PTS-STARTPTS,setpts=PTS/2,framerate=fps=30
Sound: -af "atempo=2.0"

For a video the chain goes into -i {input} -vf "<chain>,format=yuv420p" -c:v libx264 -crf 20 -preset medium <sound> -movflags +faststart {output}. <sound> is the row's sound setting.

Speed ramp, answered

Is the speed ramp on Treza free?

Yes. It runs on the FFmpeg node, which costs nothing; an account with no credits can run it ten times a day. Having the footage generated instead of uploading it is priced like any clip, about $0.28 for a four second one.

What is a speed ramp?

A change of speed inside one shot, eased rather than cut: the clip runs fast, glides into slow motion for the moment that matters, then picks up again. It is the move behind most sports, car and travel edits.

Where in my clip does the slow motion land?

The speed ramp plays the first 1.6 seconds of your clip at double speed, eases into half speed by 2.2 seconds, holds it until 3.8 seconds, and is back at double speed by 4.4. Trim your clip so the moment lands between 2 and 4 seconds. Ramp to slow motion runs in real time for 2 seconds, then stays at half speed to the end.

What happens to the sound?

Double speed keeps it, sped up to match with its pitch unchanged. The two ramps leave it out, because sound stretched and squeezed inside one clip does not hold up; add music to the result in chat.

Will the slow motion look choppy?

Each slow part is blended to an even 30 frames a second, so it glides instead of stuttering. Footage shot at 60 frames a second or more slows the most smoothly, because there are more real frames to spread out.

What formats and sizes can I upload?

MP4, MOV, WebM and the usual phone formats. The result comes back as an MP4 at your clip's own size. Keep a file under 25 MB here; longer footage can be uploaded in chat directly.