Convert 60 fps to 30 fps
To convert 60 fps to 30 fps, drop frames at a 2 : 1 ratio. The running time and audio stay the same.
How 60 to 30 fps conversion works
Frames are dropped at a regular interval to reach the lower rate. Running time and audio stay the same; motion gets slightly less smooth.
| Spec | Value |
|---|---|
| Frame ratio | 2 : 1 |
| Method | Drop frames |
| Running time | Unchanged |
| Audio | Audio is copied unchanged (-c:a copy); the running time does not change, so sound stays in sync. |
Frame counts
| Source length | Frames at 60 fps | Frames at 30 fps | Output length |
|---|---|---|---|
| 1 second | 60 | 30 | 1 s |
| 10 seconds | 600 | 300 | 10 s |
| 1 minute | 3,600 | 1,800 | 1 min |
| 10 minutes | 36,000 | 18,000 | 10 min |
FFmpeg command
ffmpeg -i input.mp4 -vf fps=30 -c:a copy output.mp4Verified Oct 16, 2026against FFmpeg fps filter
Changelog
- : Published; FFmpeg command tested with FFmpeg 7.1.1.
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