How do I download and install MkvDefaultTrackChanger?

MkvDefaultTrackChanger is a small open-source tool that sets the default audio and subtitle tracks in MKV video files. To get it, download the build for your operating system from the project page — Windows, Linux (GTK), or MacOS — then run it. The site lists no price or account requirement, so the download is the only step described before you can use it.

What the tool does

It changes which audio and subtitle track an MKV player treats as the default. According to the project page, it is:

• Simple — a plain UI with no extra features.
• Fast — it does not process the whole file, so changes are quick.
• Batch-capable — you can process multiple MKV files at once, provided they have the same order of subtitle and audio tracks.

That last condition matters: batch mode assumes the files share the same track layout. If your files differ in track order, handle them separately.

Download options

Pick the build that matches your system:

The project is open source and hosted on GitHub, so you can also review the source or check for updates there.

Steps to get started

1. Open the MkvDefaultTrackChanger project page.
2. Choose the download matching your operating system (Windows, Linux GTK, or MacOS).
3. Run the downloaded application.
4. Load your MKV file or files.
5. Set the default audio and subtitle tracks you want.
6. Apply the change — because the tool skips full-file processing, this should complete quickly.

Common sticking points

• Batch mode needs matching track order. If your MKV files order their audio or subtitle tracks differently, batch processing may not apply the intended defaults. Verify the track order first.
• Platform build matters. Linux users need the GTK build; there is no separate generic Linux package listed.
• No pricing or login details are given. The page does not mention cost or an account, so treat the download as the starting point and check the project page for any current terms.