Mute Video (Remove Audio)

Take the sound out of a video before you post it — wind noise, a private conversation in the background, music that would get the clip blocked — or silence just a few seconds, such as a name or a swear word. Removing the whole sound track copies the picture without re-encoding, so it takes seconds even for long videos and the quality stays exactly the same. It works in your browser with the ffmpeg engine (about 30 MB, downloaded the first time); your videos are not uploaded.

How to use this tool

1. To remove all sound, leave the parts box empty. To silence only some moments, type them, e.g. 0:05-0:12, 1:30-1:45.
2. For parts, choose silence or a lower volume.
3. Choose one or more videos; muting starts right away.
4. Play the result to check and download it in its original format.

Formula

Whole video: output = video streams copied + no audio. Parts: volume × 0 (or the chosen %) where start ≤ t ≤ end

Removing the track is a stream copy: the picture data is not decoded at all. Muting parts has to re-encode the sound (AAC for MP4/MOV/MKV, Vorbis for WebM, MP3 for AVI), while the picture is still copied. The sound is processed in blocks of about 21 ms, so muted parts are accurate to about 1/40 of a second. Subtitle tracks are kept when the format allows it.

Example

A 1.2 GB, 10-minute phone video with its sound removed is ready in well under a minute and is about 19 MB smaller, because a 256 kbps AAC track takes 256,000 ÷ 8 × 600 = 19.2 MB. Silencing 0:41-0:43 instead re-encodes the 10 minutes of sound, which takes around half a minute.