joost@localhost ~ $ emerge -pv ffmpeg

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] media-video/ffmpeg-0.4.9_p20070525  USE="X a52 aac encode ieee1394 mmx network ogg sdl theora truetype v4l vorbis x264 xvid zlib (-altivec) -amr -debug -doc -imlib -oss -test -threads" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB