Top 3 Ways to Add Audio to MP4 Video Easily

How to add a background music to an MP4 video that already has audio track?

While editing a video, you may often have the need to add a new audio track or background music to it, for different purposes. Do you know how to add audio to MP4 without re-encoding?

Add Audio to MP4

Below is 3 creative ways to add audio to MP4 video with professional video audio editor, HandBrake, and free online audio track to video adding tool.

Part 1. Best Way to Add Audio to MP4 File Without Re-encoding

Video Converter Ultimate is a powerful video and audio editor software that can help you add any audio track to video file like MP4, MOV, FLV, AVI, MKV, and more. All popular lossless and lossy audio formats including AAC, M4A, MP3, FLAC, etc. are supported. For adding audio to MP4, it offers a simple and straight-forward solution.

• Add any audio to MP4 video on Windows 10/11/8/7 PC and Mac with high quality.
• Support almost all 8K/5K/4K, HD/SD video and lossy/lossless audio formats.
• Replace original audio track of video with new music and custom various audio settings.
• Offer toolbox of Media Metadata Editor, Audio Sync, Volume Booster, GIF Maker, 3D Maker, and more.

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

Step 2: Click the audio track like AAC-2Channel of your imported MP4 video. Choose Add Audio Track option from the drop-down list. Then you can browse and select a new audio track for the MP4 file. As it mentioned above, all commonly used audio formats are supported. You can freely add any audio to MP4. Moreover, you are allowed to add subtitles to MP4.

Step 3: You will see a message prompting that, this added audio is editable, if you want to open the editor. Click Edit now button to enter the main audio editing window.

Step 4: Now you can adjust volume, set delay effect, or change audio track according to your need. After that, click the OK button to save your changes.

Step 5: If you want to edit the MP4 file, you can click the Edit icon. You are able to trim video, rotate or crop it, adjust output effect, enhance quality, add watermark, and do other editing operations. Before exporting the edited video, you should select a suitable output format from Convert All to. Then click Convert All button in the bottom-right corner to do that.

Part 2. Add Audio Track to MP4 Using VLC Media Player

VLC is a free and open-source media player that available for macOS, Windows, and Linux. Besides the basic playing feature, it is also designed with some editing and recording functions. It enables you to add an MP3 audio to MP4 video file with ease. You can free install VLC from its official site and then take the following guide to add audio to MP4 with it.

Step 1: Open VLC Media Player, click Media on the top menu bar, choose the Open Multiple Files option from drop-down list. Click Add button to load your video in the Open Media window.

Step 2: Tick the Show more options checkbox and then tick Play another media synchronously.

Step 3: Click Browse button to arise the Open Media window. Here you can click on Add and then the Select button to add the audio track you want to insert to this video.

Step 4: Click the Convert/Save or Play drop-down button in the bottom right corner and choose the Convert option. Then you will be taken to the Convert window. You can click on the Browse button under the Destination section to select a location for the edited video file. Ensure you get a suitable output format, and then click Start button to add audio to MP4.

VLC will start to play the video with your added audio track as background music. It will take a while for VLC to complete the audio to video adding. Don't close VLC until the whole process is finished.

Part 3. How to Free Add Audio to MP4 Video Online with Clideo

To add audio to MP4 file directly on your web browser like Chrome, IE, Firefox, or Safari, you can rely on some online audio to video adding tool like Clideo. It has a separate Add Music to Video page for you to quickly add audio to MP4 video for sharing on YouTube, Facebook, Instagram, TikTok, or another social media. Clideo supports all the common formats like MP4, WMV, VOB, AVI, MP3, WMA, OGG, WAV, and more. You can follow the steps below to add audio to MP4 video online.

Step 1: Go to the Clideo Add Music to Video site on your browser. When you get there, click Choose file button to select and upload your MP4 video. As you can see, it also allows you to edit a file from Google Drive or Dropbox. The max file size of your uploaded video is limited to 500MB.

Step 2: It will take really long time to complete the MP4 uploading. After that, you can click Add audio to browse and add an audio file to this video. The new added audio track will be listed under the video clip.

Step 3: You are allowed to trim the added audio and adjust volume based on your need. Moreover, you can select another format for this edited video. Click Export button in the bottom right to start adding audio to MP4 file.

Part 4. FAQs of How to Add Audio to MP4 File

Conclusion

Want to add audio to MP4 without re-encoding? Here in this post, you can learn 3 effective methods to add a new audio track or background music to video. For more questions, you can leave us a message.