joost@localhost ~ $ emerge -s ffmpeg
Searching...
[ Results for search key : ffmpeg ]
[ Applications found : 4 ]

*  media-plugins/gst-plugins-ffmpeg
      Latest version available: 0.10.2
      Latest version installed: 0.10.2
      Size of files: 2,456 kB
      Homepage:      http://gstreamer.freedesktop.org/modules/gst-ffmpeg.html
      Description:   FFmpeg based gstreamer plugin
      License:       GPL-2

*  media-video/ffmpeg
      Latest version available: 0.4.9_p20070525
      Latest version installed: 0.4.9_p20070525
      Size of files: 2,211 kB
      Homepage:      http://ffmpeg.org/
      Description:   Complete solution to record, convert and stream audio and video. Includes libavcodec. SVN revision 8560
      License:       GPL-2

*  media-video/ffmpeg2theora
      Latest version available: 0.18
      Latest version installed: [ Not Installed ]
      Size of files: 223 kB
      Homepage:      http://www.v2v.cc/~j/ffmpeg2theora/
      Description:   A simple converter to create Ogg Theora files.
      License:       GPL-2

*  media-video/ffmpegthumbnailer
      Latest version available: 1.1.1-r1
      Latest version installed: [ Not Installed ]
      Size of files: 78 kB
      Homepage:      http://code.google.com/p/ffmpegthumbnailer
      Description:   Lightweight video thumbnailer that can be used by file managers
      License:       GPL-2