Browser FFmpeg recipe
Denoise Video Online with FFmpeg
Create a cleaner-looking video with moderate denoising.
Command
Run this FFmpeg command
ffmpeg -i input.mp4 -vf nlmeans=s=3:p=7:r=15 -c:v libx264 -crf 23 -preset fast -c:a copy denoised.mp4When to use it
- grainy clips
- low-light footage
- cleanup tests
How it works
- Upload the noisy video.
- Adjust nlmeans strength if needed.
- Run FFmpeg and download the denoised output.
Option reference
| Option | What it does |
|---|---|
nlmeans=s=3 | Sets denoise strength. |
p=7:r=15 | Controls patch and research window sizes. |
-crf 23 | Uses balanced H.264 output quality. |
Practical notes
- Denoising is CPU-heavy and may be slow in the browser.
- Too much denoise can soften detail.
FAQ
Will denoise remove all grain?
No. It reduces noise, but strong noise or compression artifacts may remain.
Why is this slow?
Denoise filters analyze neighboring pixels and cost more than simple conversion.