How to Convert MKV Files to MP4

The Matroska Video (MKV) video file format is used both online and on Windows-based computers, but it is not recognized by Macintosh computers. Converting a MKV file to the MP4 format provides compatibility for Macs and for use on mobile devices, such as iPods and cell phones. The QuickTime Pro program provides the best conversion experience because it works in the same fashion on both Macs and Windows-based computers, and it also enables fine-tuning of the final MP4 file. Converting an MKV file to the MP4 file format will not decrease the video quality of the original MKV file.

Designer focusing on his work on the computer
credit: Ciaran Griffin/Lifesize/Getty Images

Step

Download and install the Mac or Windows version of the free QuickTime Player program from the Apple website to the computer's hard drive (see link in Resources). Restart the Windows-based computer after the installation has been completed.

Step

Run the QuickTime Player program. Go to "QuickTime" if on a Mac or "File" if on a Windows-based computer and select "Registration." Enter your name in the "Registered To" column at the top of the window that has opened.

Step

Return to the Apple QuickTime website and click on the "Upgrade Now" button near the middle of the web page. Purchase the QuickTime Pro registration code. Enter the QuickTime Pro registration code into the "Registration" column of the QuickTime Player window that is still open. Close the window.

Step

Run QuickTime Player again, which has transformed into QuickTime Pro now that the registration code was entered into it. Go to "File" and select "Open File" from the drop-down menu. Navigate to the MKV file on the computer's hard drive. Click once on the MKV file with the mouse. Click "Open" to load the MKV file into QuickTime Pro.

Step

Go to "File" and select "Export" from the drop-down menu. Select “Movie to MPEG-4” from the drop-down menu next to the “Export” tab. Leave “Most Recent Settings” that is next to the “Use” tab alone.

Step

Select the “Options” button and select the “Audio” tab in the window that appears. Select “Best” from the “Encoding Quality” drop-down menu. Click “OK” to close the window.

Step

Name the MP4 file. Click the “Save” button at the lower-right corner to save the MP4 file that was converted from the WMA file to the computer’s hard drive.