the new amr support introduced in pre8-r1 is broken on amd64, because you have to modify some values in the include files. see http://thread.gmane.org/gmane.comp.video.mplayer.user/44009/focus=44009 I attach here the patch and a working ebuild using the patch.
Created attachment 91968 [details, diff] AMR patch for AMD64
Created attachment 91969 [details] An ebuild using the patch
Please, be so kind and include full ebuild name and version in your bug summary and description.
(In reply to comment #3) > Please, be so kind and include full ebuild name and version in your bug summary > and description. Sorry. I'll take care next time.
thanks for the patch, it's fixed now :)