slackbuilds/desktop/ffmpegthumbnailer

FFmpegthumbnailer is a lightweight video thumbnailer that 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.

ffmpeg (available at SBo) is required to build FFmpegthumbnailer.