The following projects make use of the ffmpegthumbnailer library:

• 2mandvd (http://2mandvd.tuxfamily.org/)
• kde4-ffmpegthumbnailer (http://code.google.com/p/kde4-ffmpegthumbnailer/)
• Mediatomb (http://mediatomb.cc/)
• thunar-thumbnailers (http://goodies.xfce.org/projects/thunar-plugins/thunar-thumbnailers)