Generate frames before the slow-down.
Create smoother source material for slow-motion edits by adding in-between frames first.
For editors trying to avoid judder when slowing clips down.
Prepare footage for smoother slow motion
Slow motion needs enough distinct frames to stretch time cleanly. Interpolating first creates more motion samples for the editing timeline to play back slowly.
- 01
Decide the slow-down
A 120fps output gives a 2× slow-down on a 60fps timeline; 240fps gives a 4× slow-down.
- 02
Generate the intermediate frames
Choose the target based on the final timeline rather than selecting the largest number by default.
- 03
Finish in the editor
Download the high-FPS result, interpret it at the timeline frame rate, then trim and grade as usual.
What is ai slow motion prep in ReframeFX?
Create smoother source material for slow-motion edits by adding in-between frames first.
Does ReframeFX show the cost before rendering?
Yes. ReframeFX estimates charged seconds before a render using input duration, source FPS, target FPS, and interpolation factor.
Can I use ReframeFX without installing desktop software?
Yes. ReframeFX is a browser and API workflow for cloud frame interpolation.
Does changing FPS change the video duration?
No. Frame interpolation adds motion samples while preserving playback duration. Higher targets can also be interpreted at a lower timeline FPS for slow motion.
Related frame interpolation guides
Where ReframeFX fits.
Pick the lane that matches your workflow.
Turn any clip into smooth 60fps or cinematic 240fps slo-mo in minutes, with no desktop app or code, priced transparently by the second.
| Decision | ReframeFX Browser studio + product API | Direct API WaveSpeed, HitPaw, fal.ai | Premium Topaz, Adobe, DaVinci | Local Flowframes, SVP |
|---|---|---|---|---|
| Effective price | $0.005 to $0.008/sec transparent, by processed second | $0.008 to $0.03/sec WaveSpeed floor; HitPaw higher | $25/mo+ license or subscription | $0 plus your GPU + setup time |
| FPS targets & slo-mo | 60 / 120 / 240 pick any target; true 2× / 4× slo-mo | Mostly 2× WaveSpeed fixed 2×; raw endpoints DIY N× | Any target | Any target |
| Scene change detection | Automatic learned cut detection, zero config | Basic SSIM threshold | Per-clip edit shot by shot | Opt-in manually tune sensitivity |
| API access | Same balance simple REST, one balance for studio + API | Yes separate per-product billing | Premium tier | No |
| Skill needed | None drop a clip, pick smoothness | Coding integrate the REST API | Editor skills NLE timeline or app presets | Tinkering GPU config + model files |
| No install | Browser | Browser API-first, not a browser studio | Desktop | Desktop |
| Cost shown before render | Always estimator + API endpoint | Per-second no upfront calc UI | Sub-billed | n/a |
| Setup time | < 1 min sign in, drop a clip | ~5 min create API keys, learn shape | 15+ min install + license + first export | 30+ min GPU drivers + model downloads |