The Media Player Codec Pack (version 4.6.1) is a comprehensive software bundle that enables Windows Media Player and other DirectShow-based players to support a wide range of modern video and audio formats, including MKV, HEVC, and 4K media. Available in Standard, Plus, and Lite editions, the pack optimizes playback for various systems while resolving common "unsupported format" errors. For more details and to download, visit Media Player Codec Pack . Media Player : Codec Pack - For Windows 11 / 10 / 8.1 / 7