Matroska (MKV) is similar in conception to other containers like AVI, MP4 or ASF, but is entirely open in specification, with implementations consisting mostly of open source software. Matroska file types are .MKV for video (with subtitles and audio), .MKA for audio-only files and .MKS for subtitles only. The most common use of .MKV files is to store HD video files.
How to convert MKV to MP4 format? 4Media MP4 Converter for Windows, professional MP4 converter, can help you easily and fast convert MKV files to MP4 format with high quality reserved. This guide will show you how to convert MKV to MP4 step by step with this MP4 converter.
Launch the MP4 converter, then let’s start the MKV to MP4 conversion.
Step 1: Add the MKV files
Click the “Add” button to add your prepared MKV file, and you can add several files to convert in one time.

Step 2: Set output format as MP4
Open the profile drop down list, and set the output format as MP4 Video (*.mp4) or choose a particular MP4 format for your player: Apple TV, Archos, Creative Zen, iPhone, iPod Touch, iRiver, PS3 and PSP.

And you can set the destination folder yourself: click “Browse” button to change the default destination. And to get customized MP4 videos, in the right setting panel you can set video size, video quality, audio quality, channels (mono or stereo).
Step 3: Start the MKV to MP4 conversion
Click the green “convert” button to start converting the checked MKV video files.
Everything is so easy. Download the converter to have a trial from now on.