How to Merge Audio and Video on Windows, Mac, & Online?

WonderFox HD Video Converter Factory Pro is our top recommendation for Windows users who want to easily combine audio and video files.

As a comprehensive video processing program, it allows you to adjust many aspects of your video, including the audio track. You can remove, replace, or merge a new audio file into your video with just a few clicks. The entire process will be quick without re-encoding the video, so you won’t lose image quality.

It supports almost all video and audio formats and offers over 500 output presets. Additionally, you can also use this video editor to cut and split videos, merge multiple files, and much more.

Just downloaddownload it here now, and let’s get started with the audio and video merging task.

To combine video and audio files on Mac, the pre-installed editing app iMovie is enough.

It comes with many useful video editing features like cutting, cropping, and rotating video clips, adding video transitions, boosting audio volume, and, of course, merging audio and video. More than that, it also provides many cool filters, movie templates, special effects, and so on to make your video look professional.

Without further ado, let’s see how to merge video and audio in iMovie.

Step 1: Launch iMovie on your Mac. Create a new project and add a video to it. Then drag the video to the timeline for editing.

Step 2: Switch to the Audio tab and select the wanted audio source from iTunes, Sound Effects, and GarageBand. Then drag the selected one to the timeline.

Step 3: Edit the audio and video clips if needed.

Step 4: After finishing the video and audio combining and other editing processes, you can go to “Share” > “File” to export the video. iMovie also enables you to quickly upload the edited video to YouTube.

Apart from using desktop video editing apps to merge audio and video files, some users may wonder how to combine a video and audio file online, as there are many online video editors now. So this part also shows you how to merge audio and video online with a handy online video editor—Veed.io.

It's one of the most popular online video editors that can do many edits to your video, including combining video and audio together. Just let’s see how to combine audio and video online with Veed.io.

Step 1: Visit the official website of Veed.io: https://www.veed.io/;

Step 2: Click “Create your first video” from the initial interface to enter the video editing workspace;

Step 3: Press “Upload a File” to import the video from your local drive, or you can also choose to add a video from Dropbox and a link.

Step 4: Hit the Audio icon at the left side of the interface to add audio to the video. You can right-click the video on the timeline and select “Audio” to mute the original audio.

Step 5: Click “Export” > “Export Video” and wait for the video audio merging process. You can then preview the video and click the download icon at the right side of the interface or share it to Facebook, Twitter, etc.

As an added bonus, this section will show you an advanced method for merging audio and video files using FFmpeg, a free and open-source video tool known for its versatility.

It’s worth noting that merging audio and video is just one of the many things FFmpeg can do, but due to its command-line based workflow, this method is only suitable for expert users. If you're looking for a challenge, here are the steps you can follow:

Step 1: Download FFmpeg from https://ffmpeg.org/download.html and extract the zipped file.

Step 2: Rename the extracted folder to FFmpeg and move it to the root of your C: drive.

Step 3: Add FFmpeg to your system PATH:

• Press Win + S, type "environment variables", and open Edit the system environment variables.
• Click Environment Variables.
• Under System variables, select Path and click Edit.
• Click New and enter the path to the FFmpeg bin folder, for example: C:\FFmpeg\bin
• Click OK to save the changes.

Step 4: Move the video and audio files you want to merge into the FFmpeg bin folder.

Step 5: Press Win + S, type cmd, and press Enter to open Command Prompt.

Step 6: Run the following command:
ffmpeg -i video.mp4 -i audio.mp3 -c:v copy -c:a copy output.mp4

Replace video.mp4 and audio.mp3 with your actual video file name. Then press Enter.

After the process finishes, the merged file will be saved as: output.mp4.

With the tools provided above, you can now combine video and audio files on Windows, Mac, and online without hassle. Just choose one according to your actual needs and start merging audio and video now. Hope this post can help you with your problem. Thanks for reading. Wish you have a nice day!