Getting started with SlowRamp
Start with a clip you want to slow down or reframe. You can preview your changes before exporting a new video for your edit.
Edit your first clip
1. Open a video
Drag a MOV, MP4, or M4V into SlowRamp, or press Command–O to choose one. To keep just part of the clip, move the playhead and use Q to set the start and W to set the end.
2. Adjust the speed curve
Add points to the Speed curve and drag them to change the speed and timing. Use Smooth to make transitions more gradual. Audio changes speed and pitch along with the video.
3. Preview super slow motion
On a supported Mac, SlowRamp marks every part of your curve that is too slow to look smooth in purple and creates new in-between frames there. Choose Render all ranges in the Speed inspector to preview them before exporting. Parts you haven’t rendered play using the original frames. You can choose what counts as smooth motion in SlowRamp → Settings → General (30 fps by default).
4. Set the center keyframes
In Framing, turn on Enable crop and choose an aspect ratio. Move to a point in the clip and drag the crop over your subject. Repeat where the subject changes position. Adjust the points in the Framing curve and use Glide to smooth the movement.
5. Add a timed zoom
Select a range on the zoom lane, set the amount between 1.1× and 4×, choose how quickly it ramps in and out, and drag the focal point on the preview. Modes: in, out, in and out, or constant. The focal point can be keyframed. Zoom blocks sit on the source timeline, so they stay on the action when you change the speed curve. Output resolution is unchanged.
6. Export your video
Choose Export and save the result as a new video. Import that file into your video editor to continue your edit. SlowRamp saves your project so you can return and make changes later.
Press ? in the editor to see the keyboard shortcuts.
System requirements
- Mac
- Intel or Apple silicon, running macOS 14 or later. Speed ramps, audio curves, tracking, and centering work with the original frames on either.
- Optical Flow
- Super slow motion with generated frames requires a supported Apple silicon Mac running macOS 15.4 or later. On other Macs, SlowRamp uses the original frames.
- Video files
- MOV, MP4, and M4V, including H.264, HEVC, and ProRes. SlowRamp preserves supported source formats and colour information; if a codec needs conversion, the app asks before exporting with HEVC.
- Vertical crops
- Choose 9:16, 1:1, or 4:5. The source must be wider than the crop. Crop export currently requires a source without rotation metadata.
If the preview needs adjusting
Slow motion looks distorted
Fast movement, motion blur, and objects crossing each other can confuse Optical Flow. In the Speed inspector, switch off the range where it happens to keep the original frames there.
The crop moves away from your subject
Add or move a center keyframe where the framing goes off course. If you used Track subject, check the whole result: automatic tracking can drift or lose the subject. Manual keyframes let you correct those sections.
You moved the original video
Open the saved project and relink it to the video’s new location. Your edits are stored in the project.
Licence help
Without a licence, SlowRamp is a free trial with every feature. Exports carry a small SlowRamp watermark and are limited to 1080p, and previews render at 720p. To remove these limits, choose Remove watermark next to Export, or open SlowRamp → Settings → Licence, and enter your licence key.
Your Polar purchase email contains your licence key and a link to the customer portal. Use the portal to find your download or manage activations.
Connect to the internet when activating SlowRamp. After activation you can work offline, with periodic online verification. If verification fails, reconnect and choose Retry verification. You can verify your licence or deactivate this Mac in Settings.
Updates install from inside the app: SlowRamp checks on launch and you can choose Check for Updates… from the SlowRamp menu. If you are still on version 0.1.0, download the current version once from your Polar purchase page; later updates arrive automatically.
Installation instructions