How to Merge Multiple MP4 Video Files into A Single One

Step 3. Check "Merge" item on the right.
On the right of the main interface, click to check the "Merge" option on the right.

Step 4. Change the video sequence if you need.
You can adjust the sequence of the video files you added, or delete any of them to disable its merging.

Plus, WinX also offers basic video editing features such as cut MP4 video, crop your video for full-screen playback, add subtitles, adjust parameter settings and more. All these tasks can be down without too much learning curve.

• Sequence: move the mouse on the file you want to adjust, click Up or Down icon on its right to move up or down.
• Delete: move the mouse on the file you want to adjust, click Trash Bin and the file will be removed.

Step 5. Customize the merged MP4 file if necessary.
On the top of the video section, click the Settings icon and make adjustments of video audio parameters according to your need. Or edit any file by clicking "Edit" icon, say, adjust Audio Volume, add subtitle, crop, expand, trim the video.

Step 6. Start merging the video files.
Hit "RUN" button on the bottom right. After seconds, you can get the merged MP4 video file in the destination folder you set on your computer.

You may also be interested in: How to Merge Two or More MKV Files into One

#2. MP4Joiner

MP4Joiner is a part of MP4Tools package, which wins a good reputation for a long time in combining MP4 files. It's designed for merge MP4 videos with different codecs, resolution, etc. In our test, it successfully combined an MP4 file encoding in H.264 and an MP4 file encoding in HEVC without any trouble. Let's take a closer look on how to merge MP4 footage with it.

Step 1: Download MP4Tools package and install it on your computer.

Step 2: Launch it. And click on the green + Add button to import your target MP4 video clips into the program.

Step 3: Click the Up and Down arrow to adjust the sequence of the imported MP4 video clips if needed.

Step 4: After all done, just click the Join button and choose the output folder to make them into one new file.

#3. VLC

You know what, merging MP4 is also available on VLC Media Player. Besides being a free media player, VLC can do more with various hidden features, including merging videos. You can put multiple MP4 clips together within like a couple of clicks. But you have to ensure the multiple videos are in the MP4 format. VLC seems not support merge videos of different formats.

To merge videos using VLC, follow these steps:

1. Open VLC media player on your PC.
2. Click on Media > Open Multiple Files.
3. Click the Add button and choose your files.
4. Expand the drop-down list and choose the Convert option.
5. Select MP4 as the video profile, and tick the Append "-convert’" to filename checkbox.
6. Click the Start button.

Besides, you can also rotate MP4 video with media player from its Tools. Click for more tools to rotate MP4 >>

#4. Windows Photos App

If you don't want to download any software for merging MP4 video, you can also apply the Windows 10 built-in Photos App to combine MP4 videos. The Photos app is an in-built image viewer for Windows 10, but it still can be used to merge videos. Creating a video using the Photos app is not much time consuming as it requires no installation. Here's how to merge video with Photos app.

1. Open the Photos app on your PC.
2. Click the New video > New video project.
3. Enter a name for your video project.
4. Click the Add button.
5. Choose the location of your files and select them.
6. Drag them to the Storyboard.
7. Click the Finish video option.
8. Choose a Video quality.
9. Click the Export button.
10. Choose a location, enter a name, and click the Export button.

#5. FFmpeg

You might subconsciously think it's complicated to concatenate mp4 files with FFmpeg. But actually, if you know the right way, it can be fairly easy. There are two ways to merge videos of the same type with FFmpeg, the concat "demuxer" and the concat "protocol". The demuxer is more flexible. It requires the same codecs, but different container formats can be used; and it can be used with any container formats, while the protocol only works with a select few containers. Let's go into the details.

Concat ''demuxer''

Let’s create the list first. Here is an example and let us call the list fileList.txt. In this example, both the files are in the home directory. each line starts with the keyword file and contains the path of the file within single quotes.

$ cat fileList.txt
file '/home/file1.mp4'
file '/home/file1.mp4'

Now, you can concatenate them using the following FFmpeg command: ./ffmpeg -f concat -safe 0 -i fileList.txt -c copy mergedVideo.mp4

Concat protocol

"ffmpeg -i "concat:input1.ts|input2.ts|input3.ts" -c copy output.ts". The command can be used to concatenates three MPEG-2 TS files and concatenates them without re-encoding. But it's not usually not used to merge MP4 videos. To join MP4 files, the videos could be losslessly concatenated by first transcoding them to MPEG-2 transport streams. With H.264 video and AAC audio, the following can be used:

ffmpeg -i input1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i input2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc output.mp4

#6. iMovie

If you're running on MacOS and willing to join MP4 files, iMovie could be the best choice for you. iMovie is a video editing tool developed by Apple, which comes with several editing features that support creating customized features. Among the list, video merging is one of the features supported by the software. By using iMovie, video clips in all popularly used formats can be added, edited, and merged in good quality. If you want to merge MP4 with iMovie on Mac, the following steps could do you a favor.

Step 1: Open up iMovie on your Mac computer and click "File" > "New Project" to build a new project.

Step 2: Go to "File > Import > Movies" to browse and select the MP4 video clips you want to merge on your computer.

Step 3: Now you can choose the clips you want to join, drop them into the Project window, and arrange the order of them according to your needs. You can press the "Play" button to preview your merged MP4 video clips.

Step 4: When you're done, export your merged video by going to "Share". And there are a variety of different options. The common export option is "File" since it's the most basic way to create a new clip. If you want to send to file to iTunes, select the "iTunes" option. After clicking the File, set up the resolution, format, quality in the pop-up dialogue.

#7. Clideo

For those who don't want to install any programs on their computer, they can also concatenate MP4 video files with online MP4 joiners like Clideo. It's based on web browsers. Thus you can directly upload your MP4 video clips to the Clideo, and merge them into one. It also allows you to set the desired aspect ratio and output format, add an audio track. By using the predefined settings, you can quickly create an ideal video for YouTube, Facebook, Instagram or Instagram Story.

How to use the Clideo video merger:

Step 1: Click "Choose Files" button to choose the MP4 videos you would like to merge.

Step 2: Rearrange them using drag-and-drop until they're the desired order. Then you can set duration, add audio, change its length and volume, choose the aspect ratio etc.

Step 3: At last, click the "Export" button. Once your files have been merged, watch the preview and click "Download" button to save the video.