How to Mix Audio to Video

by Alexis Lawrence

Editing video sometimes includes editing audio files. By mixing audio and video, you can take the video footage from one file and the audio data from another file and create an entirely original video. Though mixing audio and video well takes some practice, getting started is simple. If you have a video file to which you would like to add audio, you can do so using a standard video-editing program that may already be installed on your computer.

Windows Movie Maker


Launch Windows Movie Maker if you have a Windows system. As the native video editor for Windows, Movie Maker comes pre-installed on many Windows computers. But if you do not have Movie Maker, download it free at the Microsoft website.


Open Windows Movie Maker on your computer by going to the “Start” menu, clicking on the “All Programs” option and then clicking on Windows Movie Maker, which appears near the top of the list. Once Movie Maker has opened, import both the video and audio files that you want to mix by clicking “Import Media,” going to the folder that contains the video and double-clicking the video and then to the folder that contains the audio and double-clicking the audio.


Move the video that you want to mix the audio with to the “Video” track on the timeline in Movie Maker. Drag the audio file onto the “Audio/Music” track in the timeline.


Click on the audio track to move it along the timeline to mix it into the part of the video where you want the audio to play. Preview the audio and video mix by clicking the play button on the preview screen to see and hear how the audio and video mix.


Eliminate the audio on the video clip if you want by clicking the “+” sign by the “Video” track to display another “Audio” track that contains the audio from the video and then right-clicking the audio track and choosing “Mute.” To mute only part of the video’s audio track, use the “Split” razor to cut the video track before and after the section of the video in which you want to mute the audio. Then right-click only that section and choose “Mute.”


Change the volume of the video’s audio clip or the audio clip contained in the “Audio/Music” track by right-clicking the track and choosing “Volume.” Use the scroll bar to adjust the volume in the window that comes up and click “OK” to save the change.


Go to “File” and “Publish.” Enter a name for the new video when prompted, choose the folder where you want to save the video and select a video format, such as WMV or AVI. Then click “Publish” to save the newly mixed audio and video as a movie file.



Open Mac’s native video editor, iMovie, by clicking the iMovie icon in the docking bar at the bottom of the desktop. If you do not have iMovie for your Mac, you can download it at the Apple website.


Click “Create Project” and enter a project name in the box that comes up. Then click the “Import” button and navigate to the folder that contains the video. Double-click the video file to import it, click “Import” again, go to the folder that contains the audio file and double-click it to import it.


Press the timeline “Viewer” button just below the preview screen to show more tracks, including two audio tracks. Move the video to the video track of the iMovie timeline and move the audio to the audio track of the timeline so it lines up with the part of the video where you want the audio to play.


Use the volume controls and mute button beneath the audio track to control the volume of the audio track. Right-click and choose “Volume” on any video clip to make changes to the audio contained in the clip.


View your mixed audio and video by clicking play in the program preview screen. Once the audio and video are mixed as you want them, go to the “Share” menu and choose “Share as QuickTime” to publish the project as a QuickTime MOV file.

Items you will need

About the Author

Alexis Lawrence is a freelance writer, filmmaker and photographer with extensive experience in digital video, book publishing and graphic design. An avid traveler, Lawrence has visited at least 10 cities on each inhabitable continent. She has attended several universities and holds a Bachelor of Science in English.

Photo Credits

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