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How to Merge MKV Videos with Audio Tracks and SRT Files

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How to Merge MKV Videos with Audio Tracks and SRT Files

Many people have searched for how to merge MKV files, and maybe you are one of them. Why do people want to do this? There are many possible reasons. Merging MKV files is a practical solution for combining split movie parts or TV episodes into a seamless viewing experience. By using the powerful tools that support lossless quality and avoid re-encoding, you can preserve the original MKV quality. This article will introduce you to the 2 effective ways to merge MKV files.

Merge MKV Files

Part 1: Merge MKV Files with MKVToolNix (Best Way)

To merge MKV files, you need to understand that MKV is a container format. If you want a lossless merge of all MKV files, you need to make sure the video codec, resolution, and frame rate are identical.

MKVToolNix stands as the industry-standard, free, and open-source solution for managing MKV files, renowned for its precision in lossless merging and multiplexing. Unlike traditional video editors that re-encode footage, this powerful suite allows you to stitch together video segments or incorporate multiple audio and subtitle tracks without any quality degradation. It offers unparalleled control over file headers, track synchronization, and metadata, making it the go-to tool for professionals and hobbyists alike who need a reliable, high-performance environment for processing MKV files.

Here are the steps for merging MKV files using it.

1.Download and install MKVToolNix on your computer

Download MKVToolNix from its official website, and launch the software.

2.Import the MKV files

To import the MKV files you want to merge, drag and drop your MKV file into the Source files window. Otherwise, you can click Add source files to import.

Mkvtoolnix Import MKV

3.Append subsequent MKV files

Right-click the first file in the source window and select 'Append files'. Select your second file, and it will appear indented under the first one, indicating they are now linked in a sequence.

If you need to add more MKV files, repeat the above steps.

Mkvtoolnix Append MKV

4.Adjust audio tracks and subtitles

Below the imported MKV files, you can see the audio tracks and subtitles. Here, you can select them to retain those that you want to preserve. You can also click on a track to change its language or set it as the 'Default' or 'Forced' track.

If you do not need multiple tracks or subtitles, you can keep only the necessary tracks to reduce file size.

Warning: If the internal track structure of the MKV files to be merged is inconsistent (for example, one with 5.1 tracks and another with only stereo), the merge may result in track disorder.

Mkvtoolnix MKV Merge Adjust Other Settings

5.Export merged MKV file

Lastly, choose your destination folder at the bottom and click Start multiplexing to begin the merging process.

Mkvtoolnix Export MKV

MKVToolNix allows us to manually select, sort, and set track properties during MKV merging to prevent track disorder, which is quite powerful. With proper settings, it can ensure the output MKV file has clear tracks and the correct order when played. If you are looking for a reliable tool to join MKV files, try it!

Part 2: Merge MKV Files with AnyMP4 Video Converter Ultimate (Advanced Features)

When you want to combine different MKV clips, trim the desired part, add subtitles into MKV video, and even merge different videos into an MKV file, AnyMP4 Video Convert Ultimate is a versatile MKV merger you should take into consideration. It also provides advanced video editing features, adjust the video and audio settings, or even apply video filters with clicks.

Key Features

  • Merge MKV clips, or even different video formats into a single MKV file.
  • Combine STR files, subtitle and even audio track with MKV files easily.
  • Adjust the frame rate, sample rate, video codec and more other settings.
  • Provide advanced video editing features, such as cut, trim, crop and more.
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1.Download Tool and Import MKV

Download and install the MKV merger, and you can launch the program on your computer. Go to the Converter tab, and click Add Files to add the MKV video clips you want to merge.

Add file

2.Choose Merge MKV Files into One

After adding, you can arrange the order for the MKV videos before merging. And then, check Merge into one file to join multiple MKV clips or combine 2 MKV files into 1.

Merge Videos

3.Adjust Audio Tracks and Subtitles

Click the Edit icon and access the Audio tab. You can click the + icon next to the Audio Track area to add the audio file, such as MP3, AAC, WMA, FLAC, etc. Then, you can adjust the volume and delay time as you need.

Audio

Go to the Subtitle tab. Click the + icon next to the subtitle area to add the SRT file from your computer. After that, you can change the SRT subtitle's position, font, color, transparency, delay time, etc.

Besides, this video merger also supports the subtitle in ssa, .ass, .cdg, .sub, .sup, or .idx, etc., extension.

Add Subtitle

4.Start Merging

After that, click OK to apply the adjustment. Then, choose the Convert All button to save the videos into a single MKV file on your computer.

This high-performing tool provides you with the flexible settings to adjust subtitles to merge soft subtitles (SRT). If an MKV video already has hardcoded subtitles, they cannot be separated or removed.

Note

Moreover, you can also click the Edit icon and choose the start and end time for your clip. You can drag the clipper or enter the time directly. After that, you can cut out the desired part of video before combining MKV files. (Find video cutter here)

Part 3: Combine MKV Videos Online

The above two methods offer you the convenience and efficiency to merge MKV files with ease. Besides them, we want to introduce you to the 3 more MKV merger tools that deliver free and quick MKV merging performance, to combine MKV videos.

1 AnyMP4 Video Merger Online

AnyMP4 Video Merger Online is one of the best free MKV joiners. When you don't want to download any installation, you can try to merge MKV files online using this tool. Besides joining MKV, it supports formats of MP4, MOV, MKV, AVI, 3GP, FLV, SWF, MKV, TOD, WMV, ASF, MXF, etc. Meanwhile, when exporting the joined MKV video, this online tool provides custom video resolution (from SD to 1080p HD).

Merge MKV in Anymp4 Video Merger Online

PROS

  • Easy to use with an intuitive design.
  • It is 100% free for merging videos with audio.
  • Combine multiple MKV files into one without a watermark.

CONS

  • The max video file for merging is 50MB.
  • Merge 2 video files only for one day.

2 VLC Media Player

VLC is a media file player and free MKV joiner. This software can merge or combine MKV videos on Mac or Windows computers. And it also supports joining other popular video formats, such as MP4, WMV, M4V, MOV, etc. Moreover, the merging speed is very fast. That just needs a few seconds.

Merge MKV File in VLC

PROS

  • Support some keyboard shortcuts.
  • Provides customizable conversion profiles.

CONS

  • The interface is old-fashioned.
  • The merging process is complex.

3 HandBrake

HandBrake is a popular video transcoder and free MKV video joiner. This software support combining multiple MKV videos with audio across platforms. And the merged MKV video will keep the original quality. With its user-friendly interface, you can put different MKV videos into one in a few clicks.

Combine MKV Files in Handbrake

PROS

  • Easy to convert videos and rip DVD in HandBrake.
  • No quality loss during the combination of videos.

CONS

  • Output videos in MP4 or MKV format only.
  • Have some audio and video sync problems.

Part 4: FAQs about Merging MKV Files

What is MKV?

MKV stands for Matroska Video Stream, which support a variety of audio and video codecs. It is a media container that combines several multimedia files into one single file. You can add and merge subtitle, audio track and more formation to the MKV video file.

What are SRT Files?

SRT is short for SubRip Subtitle files, which are plain-text files that contain subtitle information. The files include start and stop times next to the subtitle text, position, color and more others that ensure the files will be displayed at exactly the right moment in your video. When you merge MKV files with SRT files, you have to adjust the parameters.

How to Sync The SRT Subtitle to MKV Directly within A Media Player?

When you need to add SRT subtitle to MKV, you can copy the SRT file to the same video library folder as the video you are watching. For example, if your video is in the Videos folder, the SRT file must be located there as well. Make sure that the SRT name matches the name of the video.

Conclusion

If you need to merge MKV files, this article provides effective ways for lossless MKV combination: MKVToolNix, AnyMP4 Video Converter Ultimate, AnyMP4 Video Merger Online, VLC, and HandBrake. Each of them has unique features to show good merging performance.Choose one of these powerful tools to join your MKV files now.

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author Updated by Mark Cristobal to Edit Video
December 26, 2025 04:00

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