How to mute part of a video

Mute a section in Clipchamp on Windows

Clipchamp is Microsoft’s free video editor for Windows, available from the Microsoft Store. Its mute button works on a whole clip, so the trick is to split out the part you want silent first.

1. Open Clipchamp, create a new video, import your file and drag it onto the timeline.
2. Click the clip so it’s highlighted, move the seeker to where the unwanted sound starts, and press S or click the scissors icon to split it.
3. Move the seeker to where the unwanted sound ends and split again. You now have three pieces.
4. Select the middle piece and click the speaker icon on its left side. It changes to a crossed-out speaker. You can also turn the volume down in the audio tab of the property panel.
5. Play the section to check the cut points, then export the video.

Exporting from an editor re-encodes the video. Choose the same resolution as your original (for example 1080p) to keep the loss to a minimum.

Mute a range in iMovie on Mac

iMovie can change the volume of part of a clip without splitting it.

1. Create a project and add your video to the timeline.
2. Hold down the R key, and when the pointer changes to the range selection pointer, drag across the part of the clip you want to silence.
3. Drag the horizontal volume line inside the selection all the way down. Only the selected range changes, and iMovie adds a short fade at each edge.
4. Play it back, then export the movie as a file from iMovie’s share options.

Mute a time range with FFmpeg

If you know the exact timestamps, FFmpeg can silence them without touching the picture. This example mutes seconds 10 to 20:

ffmpeg -i input.mp4 -c:v copy -af "volume='if(between(t,10,20),0,1)':eval=frame" -c:a aac output.mp4

The video stream is copied unchanged, while the audio is re-encoded to AAC because it has to be modified. To mute several ranges, add them together, for example if(between(t,10,20)+between(t,45,50),0,1).

On a phone

Gallery apps such as iPhone Photos only mute the whole video. To silence one section on a phone, use a mobile editor such as iMovie or CapCut: split the clip at both ends of the section, select the middle piece and set its volume to zero. Button names vary between app versions, but the split-then-mute pattern is the same.

When removing all the sound is the better fix

If most of the clip is wind noise or background chatter, or you’re going to lay music over it anyway, removing the whole audio track is faster and avoids an editor export. A tool like MuteVideo does that with a stream copy, so the picture keeps its original quality. If the unwanted sound sits at the very start or end, trimming that part off may also be simpler than muting it.

A sudden silent gap is noticeable. For speech you want to hide, a short beep or a quiet music bed over the muted range often sounds more natural.