This video thumbnailer can be used by file managers to create thumbnails
for your video files. The thumbnailer uses ffmpeg to decode frames from
the video files, so supported videoformats depend on the configuration
flags of ffmpeg.

This thumbnailer was designed to be as fast and lightweight as possible.
The only dependencies are ffmpeg and libpng.

WWW: http://code.google.com/p/ffmpegthumbnailer/