Windows Essentials Media Codec Pack

Windows Essentials Codec Pack 3.5 (abbreviated as WECP) is a collection of media codecs, filters, splitters and some other tools, allowing you to play up to 99% of video, audio and flash formats available on the Internet. WECP also contains some powerful filters to help you improve video and video quality. WECP has built-in auto-upgrade functionality, ensuring you always have the latest codecs.