This free software converts Matroska video files to MP4 format for playback on many portable devices, including iPhones, iPods, Samsung Galaxies, Microsoft Surfaces, HTCs, and PSPs.

This program offers a variety of video encoders for you to choose from, including the modern H.264/AVC or H.265/HEVC codecs, as well as the old but still popular Xvid encoder. For the audio stream, it uses the AAC (Advanced Audio Coding) or MP3 encoder (LAME) to ensure that the sound quality of the original file is preserved as much as possible during conversion.
While the default settings of the software will automatically select all the encoding parameters that are needed to preserve the highest video and audio quality, advanced users can also customize many different video and audio parameters. This includes the codec, the bitrate, the display aspect ratio, the frames per second, the resolution, and more. You can even convert the color into grayscale or sepia, as well as adjust the brightness, audio sampling frequency, volume, and other options.
One of the best things about this program is that it includes a number of conversion profiles that are designed for typical conversion tasks. Whether you're converting videos for your website or preparing them for a specific device, these profiles will make it easy for you to get started. And if you need more control over the process, you can always customize the output settings to meet your specific needs.
Using Pazera Free MKV to MP4 Converter is extremely simple: all you need to do is drag and drop your MKV files into the main window, and click the "Convert" button on the toolbar. The program is available in both 32-bit and 64-bit versions, with the latter offering faster conversion speeds (up to 50%, depending on the selected video encoder). Overall, this is a reliable and user-friendly software that can help you convert your MKV files to MP4 with ease.
Version 1.1: New conversion engine, added support for H.265/HEVC encoder, improved matching of encoding parameters with automatic settings, new file list control with many additional features (sorting, row and column reordering), better detection of data streams in the source files, new columns, and many more.