video_decoder: no plugin available to handle 'XviD' equery files media-libs/xvid [ Searching for packages matching media-libs/xvid... ] * Contents of media-libs/xvid-1.1.0-r1: /usr /usr/include /usr/include/xvid.h /usr/lib /usr/lib/libxvidcore.a /usr/lib/libxvidcore.so -> libxvidcore.so.4.1 /usr/lib/libxvidcore.so.4 -> libxvidcore.so.4.1 /usr/lib/libxvidcore.so.4.1 /usr/share /usr/share/doc /usr/share/doc/xvid-1.1.0-r1 /usr/share/doc/xvid-1.1.0-r1/AUTHORS.gz /usr/share/doc/xvid-1.1.0-r1/ChangeLog.gz /usr/share/doc/xvid-1.1.0-r1/INSTALL.gz /usr/share/doc/xvid-1.1.0-r1/README.gz /usr/share/doc/xvid-1.1.0-r1/TODO.gz emerge --info Portage 2.1_pre10-r3 (default-linux/x86/2006.0, gcc-3.4.5, glibc-2.3.6-r3, 2.6.16-beyond2 i686) ================================================================= System uname: 2.6.16-beyond2 i686 AMD Athlon(tm) XP 2800+ Gentoo Base System version 1.12.0_pre19 distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [enabled] dev-lang/python: 2.4.2 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: [Not Present] dev-util/confcache: [Not Present] sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.16.1 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=athlon-xp -msse -mmmx -m3dnow -momit-leaf-frame-pointer -fomit-frame-pointer -ftracer -ffast-math -fprefetch-loop-arrays -freduce-all-givs -finline-limit=600 -mfpmath=387 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/NX/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/eselect/compiler /etc/gconf /etc/splash /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=athlon-xp -msse -mmmx -m3dnow -momit-leaf-frame-pointer -fomit-frame-pointer -ftracer -ffast-math -fprefetch-loop-arrays -freduce-all-givs -finline-limit=600 -mfpmath=387 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distcc distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="http://gentoo.osuosl.org/ http://mirror.datapipe.net/gentoo http://distro.ibiblio.org/pub/linux/distributions/gentoo/ http://cudlug.cudenver.edu/gentoo/" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude='/distfiles' --exclude='/local' --exclude='/packages'" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.us.gentoo.org/gentoo-portage" USE="x86 3dnow 3dnowext X a52 aac acpi alsa apache2 arts athena audiofile automount avi berkdb bitmap-fonts bl cli cpudetection crypt css cups dbus divx4linux dnd dri dv dvd dvdr dvdread encode esd firefox foomaticdb fortran gdbm gif gnome gpgme gpm gtk gtk2 hal hpn ieee1394 imap imlib ipv6 isdnlog jpeg kde kdeenablefinal kdexdeltas libg++ libwww lm_sensors mad matroska mbox mikmod motif mp3 mpeg mpeg4 mplayer musicbrainz ncurses new-login nls nptl nptlonly nsplugin ntlm nvidia ogg opengl oss pam pcre pdflib perl png pppd python qt quicktime rdesktop readline real reflection sdl session spell spl sse sse2 ssl tcpd truetype truetype-fonts type1-fonts udev userlocales vcd vorbis win32codecs xanim xface xml xmms xorg xv xvid xvmc zlib elibc_glibc input_devices_keyboard input_devices_mouse kernel_linux userland_GNU video_cards_nvidia video_cards_nv video_cards_vesa video_cards_fbdev" Unset: ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTAGE_RSYNC_EXTRA_OPTS
Well, xvid is not used directly by xine-lib. Please provide the output of emerge -pv xine-lib ffmpeg and make sure that if you have the ffmpeg useflag enabled you have revdep-rebuilt the system after last ffmpeg update. Finally, please provide the output of xine --verbose=3 /some/xvid/file
Reopen after providing the requested information.