Create Slow Motion from Normal Video

Why this matters

Simply playing 30fps at 25% speed stutters — there are no frames to show. Frame interpolation creates them, so slow motion looks like it was shot that way.

The higher the factor, the more important motion-aware generation becomes; naive blending ghosts fast action.

How it works

Submit with factor=4 and motion=smooth; the API generates the in-between frames, and you play the output at reduced speed.

Submit a job with an input URL (S3, GCS or HTTPS), poll the job URL, and download the rendered output. No GPU, no queues, no ffmpeg builds to babysit.

Code

import requests, time

API = "https://api.mlslabs.io/v1/frame-interpolation/jobs"
headers = {"X-API-Key": "YOUR_API_KEY"}
payload = {"input": "s3://bucket/clip.mp4", "factor": 4, "motion": "smooth"}

resp = requests.post(API, json=payload, headers=headers)
job = resp.json()
while job["status"] not in ("succeeded", "failed"):
    time.sleep(3)
    job = requests.get(job["url"], headers=headers).json()

print("Output:", job["output_url"])

Pro tips

• Shoot at the highest frame rate you have, then interpolate the rest.
• For sports, keep the camera steady — pan blur limits what interpolation can fix.
• Deliver slow-mo as a separate clip; keep the original speed master.

Try the slow-mo preset in Postman.