GSpot is a Windows-based freeware program designed to identify the codecs used in video files. In addition, the application checks if the required DirectShow filters or Video for Windows codecs are installed and configured for proper playback. While originally created to support AVI, it was expanded to include full support for Ogg and limited support for other commercial container formats, including versions of MPEG, QuickTime, and Windows Media Video. It is still used and is listed by on fourcc.org as one of the few FOURCC identifiers.