This allows you to use almost any type of codec. Since it is an open format that does not require any licensing requirements, it is best if it is compatible with free software. MP4 has more compatibility but lower quality, while MKV has better quality but more space and poor compatibility. MP4 is a common compression format/container for converting movies to a portable player format (such as iPad/iPod/iPhone). In the Open File dialog box, select the MKV file and click Open. To open an MKV file in VLC media player, you need to launch it and then choose File > Open from the main menu. If the file does not open, then you need to install the VLC Media Player software. If the MKV player software is properly connected, the file will open. Try double clicking the MKV file in Windows Explorer. The chance of a long-term commitment is greater with MKV if you make the right choices.MKV support is better than MP4 for some functions including multiple tracks and sub.It's an open format that doesn't require a license, so it works best with mmmmecia programs.

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