imagemagick uses mpeg2vidcodec. in particular, i use this to do things like: convert movie.miff movie.mpg maybe you could consider noting this in the ebuild, and have a USE var for it. there are also other packages others may use. -brady
it's in the 5.5.3.2 ebuild, sorry for noting this in the bug report sooner.
it works on ~amd64... should make it unstable there