It enables you to add an MP3 audio to MP4 video file with ease. Besides the basic playing feature, it is also designed with some editing and recording functions. VLC is a free and open-source media player that available for macOS, Windows, and Linux. Add Audio Track to MP4 Using VLC Media Player Then click Convert All button in the bottom-right corner to do that. Before exporting the edited video, you should select a suitable output format from Convert All to. You are able to trim video, rotate or crop it, adjust output effect, enhance quality, add watermark, and do other editing operations. Step 5: If you want to edit the MP4 file, you can click the Edit icon. After that, click the OK button to save your changes. Step 4: Now you can adjust volume, set delay effect, or change audio track according to your need. Click Edit now button to enter the main audio editing window. Step 3: You will see a message prompting that, this added audio is editable, if you want to open the editor. Moreover, you are allowed to add subtitles to MP4. As it mentioned above, all commonly used audio formats are supported. Then you can browse and select a new audio track for the MP4 file. Choose Add Audio Track option from the drop-down list.

Step 2: Click the audio track like AAC-2Channel of your imported MP4 video.

Here you can click Add Files button or plus icon in the central part to add your MP4 file. As a new user, you will be automatically guided to the Converter feature. Step 1: Select the right download version based on your system, free install and run it on your computer.

Mac edit mp4 audio