How to Add Audio to Video in VLC

This tutorial shows how to combine video and audio tracks stored as separate files into a common video file using VLC player.

Let’s say you have a WebM video track and an MP3 audio track of some video downloaded from the web. Formats may vary, VLC supports a wide variety of video and audio formats.

Open the VLC media player, select the menu command “Media> Convert / Save …”.


In the “Source” window that appears, click the “Add …” button and select a video track on your computer (in our case, a WebM file). Turn on the option “Show advanced options” at the bottom of the “Source” window, and then the option “Play another media file (audio, …) in parallel” and in the “Other file” field specify the audio track (in our case, an MP3 file) using the “Browse … “.

Another “Source” window will appear, in which you need to click the “Add …” button, select an audio file on your computer and click the “Select” button.

As a result, the first “Source” window will contain the paths to both video and audio files. Click the “Convert / Save” button.

The “Convert” window will open. In the “Profile” drop-down list, select a set of codec parameters suitable for your task, which will be used to convert video. You can also create your own profile or change the settings of an existing one.

If the final file needs to be saved in MP4 format, keep in mind that the sound is correctly reproduced when playing such a video in standard Windows and Android players, you must activate the Advanced Audio Codec (AAC) audio codec support in the VLC converter.

In the “Target file” field, specify the name and location of the future file with combined video and audio.

Click the “Start” button to start the conversion process. The playback slider will display the progress of the conversion.

When the converter finishes working, close the VLC media player, open the folder with the saved video and check the merge result in the target player.

Features of merging video and audio in VLC

If the audio track is shorter than the video track, the resulting video will be truncated to the length of the audio.

If the video is shorter in duration than the audio, then the resulting video will be equal to the length of the original video track.

If the video already has an audio track, then the integrated audio track will be added to the final video file as a second audio track, and in order to hear it, you need to use the corresponding option for switching the audio stream in the settings of the media player in which the video is played.

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