From Codec Guide:
K-Lite Codec Pack Full is a collection of VFW or ACM codecs, DirectShow filters and tools. Codecs and DirectShow filters are needed for encoding and decoding (playing) audio and video formats. The K-Lite Codec Pack is designed as a user-friendly solution for playing all your movie files. With the K-Lite Codec Pack you should be able to play all the popular audio and video formats and even several less common formats.
What's new in this version:
- Updated MPC-HC to version 126.96.36.199
- Updated LAV Filters to version 0.65-36-g6b6bc
- File association improvements for Windows 10
- MPC-HC now has a new WASAPI based internal audio renderer. You can enable it in the MPC-HC output settings.
- Besides (exclusive mode) WASAPI output, it for example also supports pitch correction and stereo crossfeed.