Join videos when one clip has no audio
Combine an audible clip and a silent clip into one MP4, keeping the sound in its original part of the timeline.
Keep the clips in order
Load the example to select two small local videos. sample-1.webm is approximately three seconds long and contains a tone. sample-2.webm is approximately two seconds long and has no audio track. Keep that order, then run the tool. For your own files, choose at least two clips and use the file-order controls before joining.
Give the silent clip its own part of the audio timeline
The joiner keeps the first audio track from each audible clip and supplies silence for clips with no audio track. This gives every clip a compatible audio segment when the videos are combined. You do not need to add a separate silent audio file or mute the clip that already has sound.
Check the five-second example
The example produces a 320 by 240 pixel MP4 lasting about five seconds. Play it with your device volume enabled: the tone should be audible during the first three seconds, followed by roughly two seconds of silence. Check once near one second and again near four seconds. Small differences in the final duration can result from frame and audio encoding boundaries.
Choose the output size and review the result
The joiner converts supported clips to one output size, fitting the picture with black bars where aspect ratios differ. Re-encoding can change quality and file size. Choose up to 20 files totalling at most 200 MiB. Each input must be at most 100 MiB, 1080p and 30 frames per second, with at most five minutes of combined input duration. Only the first audio track is kept. Processing happens in this browser, with engine files downloaded from this site when needed. Review the output before sharing it and keep your originals.
Reviewed 2026-09-13. Open Video Joiner with all settings.