How to Combine MKV Files for Smooth & Uninterrupted Playback

You may have several MKV clips from a show or a project, and watching them one by one feels slow and annoying. Why not merge MKV files into a single video? Doing this saves time, keeps everything in sync, and makes sharing easier.

You can achieve that by trying the MKV mergers in this post. Each MKV merger has simple steps you can follow to join your files quickly and keep the clarity intact. Get ready to make it happen right now and enjoy smooth, single-file videos!

Part 1: The Easiest Way to Merge MKV on Windows and Mac

Merging MKV files should be easy, not confusing. You do not need to deal with lags, wrong sync, or hard tools. Fortunately, there is AVAide Video Converter that offers the easiest way to merge MKV files on Windows and Mac.

It works fast and keeps your videos clear and in sync every time. It supports all MKV codecs like H.264, H.265, so you can mix any file without trouble. Moreover, it comes with simple editing tools and smart AI features to enhance your videos.

Step 1First, get AVAide Video Converter installed on your Windows or Mac computer.

Step 2On the top menu, go to the Toolbox tab. From the list of tools, choose Video Merger.

Step 3Once the Video Merger window appears, click the Add button to import your MKV videos. This tool lets you merge MKV files into one clean and complete video.

Step 4You will see all the MKV videos lined up on the timeline. You can drag each clip to arrange them in the right order. It helps make sure your final video plays smoothly and in the correct sequence.

Step 5Once everything looks good, click Export. Please wait for a few moments while the program merges all your MKV videos into one single file. After it finishes, you can open the folder to view your new merged video.

That is how to merge MKV files using AVAide Video Converter. Super easy, right? But it does not end there; you can also use AVAide Video Converter to trim MKV videos with ease. It helps you cut out unwanted parts and keep only the scenes you like.

Aside from trimming, you can also fix the video's orientation if it is upside down or sideways. You can crop to remove black borders, add filters to change the look, and insert watermarks to protect your work.

Part 2: How to Merge MKV Videos with VLC

Besides being an MKV player that you know of, VLC is also a free and easy-to-use MKV merger, which makes it handy for quick editing. Even though it lacks advanced editing options like subtitles or track selection, it still gives a simple and clean way to join MKV videos for basic video projects.

Step 1Open VLC and click the Media tab at the top. Then, choose Open Multiple Files to begin.

Step 2Hit the Add button to upload all the MKV videos you want to merge. Please make sure the videos are listed in the correct order.

Step 3After adding them, click the Small arrow beside the Play button and choose Convert.

Step 4Pick a video format that suits your needs and set the location to save the merged video. Then, click Start to merge the files, and VLC will process the videos and combine them into one output file.

Part 3: How to Merge MKV Videos with MKVToolNix

Unlike VLC, MKVToolNix is built for users who want more control when joining MKV files. It can combine MKV files into one without re-encoding, so the clarity stays perfect. The best part is that it keeps all subtitles and audio tracks. You can even select which ones to include. It works on Windows, Mac, and Linux, making it great for professional video work.

Step 1Download and install MKVToolNix from its official website, then open the MKVToolNix GUI on your computer.

Step 2Click Add Source Files and load your first MKV file. Then, press the Append Files button to add other MKV videos you want to combine. It joins them one after another.

Step 3Please check the track list to ensure the correct video and audio files are selected. After that, set the name and location for the merged output file.

Step 4Hit Start Multiplexing, and MKVToolNix will combine all your MKV videos into one high-quality file without re-encoding.

Part 4: How to Merge MKV with FFmpeg

If you like precision, FFmpeg gives you full control through command lines. It combines MKV videos fast and keeps the original format. It does not reduce video clarity, which makes it a favorite among advanced users. Like MKVToolNix, it ensures lossless merging, but with a technical touch for those who prefer manual video editing.

Step 1Run the command prompt or terminal on your device.

Step 2Create a new text file named "input.txt." Inside it, write the names of your MKV files like this:

file 'video1.mkv'

file 'video2.mkv'

Step 3Save the text file in the same folder as your MKV videos.

Step 4Type this command: ffmpeg -f concat -safe 0 -i input.txt -c copy output.mkv

Step 5Hit Enter to run the command. FFmpeg will quickly merge the MKV files into one. It keeps the same clarity and format, so there is no loss in video clarity.

Part 5: How to Merge MKV on Mac with iMovie

For Mac users, iMovie offers a creative and easy way to join MKV files. It is perfect for beginners who want to combine clips, trim parts, or add smooth transitions. You can import videos from your device, edit them, and turn them into one polished movie. While simple, it still gives a professional look that other free tools may not provide.

Step 1Launch iMovie and click Create New to start a new project.

Step 2Go to File on the top menu and choose Import Media. Then, add the MKV videos you want to combine.

Step 3You can drag each video clip into the timeline below in the order you want them to play.

Step 4Now, hold down the Shift key, click on all the clips you want to join, then choose Modify and click Join Clips. Once combined, you can preview your video and export it as one complete MKV movie.

By Ben Carter on Nov 18, 2025