How to combine/join multiple video clips into one video file using Avidemux?

Assuming that you have downloaded and installed Avidemux, we will go straight to the example on how to append multiple video clips into one video clip. Here the video clips can be downloaded from your smartphones.

Let's say you have three clips and you want to combine all of them into one. To simplify the example, we will assume that all the clips have the same dimensions.

Append all the video clips

First, you will open the first video clip and then keep appending the other video clips until you are done. That is it. You can save to a new file, and that's it. Keep reading if you want to do something more to the videos. Note: if you have many files to combine, the quickest way to combine them all at once is to select all the files and do a drag and drop to the avidemux program.

Video Output settings

With the video settings, you can tell the program what kind of video format you want to use. Let's assume that the format of the video clips is MOV, but you want to convert it to AVI. In this case, you would change the video output to x264. One of the benefits of doing this is AVI format takes a lot less space than MOV format.
The result of doing this is when you save to a new file, the program will convert MOV to AVI for you. If you have the video output setting as Copy, then it will use the original format.



Each video format will have its own settings so you can view and change its settings by clicking on the configure button.
You can also add filters to the video as well. Clicking on the filter button will show you all the filters that are supported. One example of a common filter is the rotate filter. Applying this filter will rotate the video. Here the video will be rotate 270 degrees as shown in the screenshot below.

Audio Output settings

Same as the video output settings, one can change the audio format embedded into the video as well.

Copy means it will use the original audio format. If one wants to change the audio format to mp3, for example, one can select it from the list. Each audio format also has its own settings.

You can view and change the settings but clicking on the configure button. 

 Finally, you have made all the settings you want. Now you want to see a preview of your changes.
In order to see your changes you need to click on the output button to the right of the input button before you play the video. If you click on the input button, you won't see your changes. It will just play the original video without any of your changes.