ffdshow

ffdshow is an open source decoder and encoder mainly used for the fast and high-quality decoding of video in the MPEG-4 and AVC (H.264) formats, but supporting numerous other video and audio formats as well. ffdshow can be configured to display subtitles, to enable or disable various built-in codecs, to grab screenshots, to enable keyboard control, and to enhance movies with increased resolution, sharpness, and many other post-processing filters