emerge -pvuD world provides: ... !!! One or more updates have been skipped due to a dependency conflict: media-libs/x264:0 ('ebuild', '/', 'media-libs/x264-0.0.20091021', 'merge') conflicts with <media-libs/x264-0.0.20090908 required by ('installed', '/', 'media-video/avidemux-2.5.1-r2', 'nomerge') !!! The following update(s) have been skipped due to unsatisfied dependencies !!! triggered by backtracking: media-video/ffmpeg:0 media-video/mplayer:0 root@lynx:/usr/local/portage/media-video(76)# emerge -pvD ffmpeg mplayer These are the packages that would be merged, in order: Calculating dependencies ... done! [ebuild U ] media-libs/x264-0.0.20091021 [0.0.20090629] USE="threads -debug -pic%" 2,745 kB [ebuild U ] media-video/ffmpeg-0.5_p20373 [0.5_p19928] USE="3dnow 3dnowext X alsa doc encode gsm hardcoded-tables ieee1394 ipv6 jpeg2k mmx mmxext mp3 network sdl speex ssse3 theora threads v4l v4l2 vorbis x264 xvid zlib (-altivec) -bindist -cpudetection -custom-cflags -debug -dirac -faac -faad -jack -opencore-amr -oss -pic% -schroedinger -test -vdpau" VIDEO_CARDS="-nvidia" 3,016 kB [ebuild U ] media-video/mplayer-1.0_rc4_p20091026 [1.0_rc4_p20090919-r2] USE="X a52 aac alsa ass cddb cdio cdparanoia dga dirac doc dts dv dvb dvd dvdnav enca encode esd faac faad gif iconv ipv6 jpeg ladspa libcaca lirc live lzo mad mmx mmxext mng mp2 mp3 network opengl osdmenu png pulseaudio quicktime rar real rtc samba schroedinger sdl shm speex sse sse2 theora tremor truetype unicode v4l2 vorbis x264 xscreensaver xv xvid xvmc -3dnow -3dnowext -aalib (-altivec) -bidi -bindist -bl -cpudetection -custom-cpuopts -debug -directfb -dxr3 -fbcon -ftp -ggi -gmplayer -jack -joystick -md5sum -nas -nut -openal -opencore-amr -oss -pnm -pvr -radio -ssse3 (-svga) -teletext -tga -v4l -vdpau (-vidix) (-win32codecs) -xanim -xinerama -zoran" VIDEO_CARDS="-mga -nvidia -s3virge -tdfx" 15,146 kB Reproducible: Always root@lynx:/usr/local/portage/media-video(77)# emerge --info Portage 2.1.7.1 (default/linux/amd64/10.0/desktop, gcc-4.4.2, glibc-2.10.1-r0, 2.6.31-gentoo-r3 x86_64) ================================================================= System uname: Linux-2.6.31-gentoo-r3-x86_64-Intel-R-_Core-TM-2_Duo_CPU_T8300_@_2.40GHz-with-gentoo-2.0.1 Timestamp of tree: Tue, 27 Oct 2009 09:00:01 +0000 app-shells/bash: 4.0_p35 dev-java/java-config: 2.1.9-r1 dev-lang/python: 2.6.3, 3.1.1-r1 dev-python/pycrypto: 2.0.1-r8 dev-util/cmake: 2.6.4-r3 sys-apps/baselayout: 2.0.1 sys-apps/openrc: 0.5.2-r1 sys-apps/sandbox: 2.2 sys-devel/autoconf: 2.13, 2.63-r1 sys-devel/automake: 1.4_p6, 1.5, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.2, 1.11 sys-devel/binutils: 2.20 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.6a virtual/os-headers: 2.6.30-r1 ACCEPT_KEYWORDS="amd64 ~amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe -fomit-frame-pointer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config /var/lib/hsqldb" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/eselect/postgresql /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c /etc/udev/rules.d" CXXFLAGS="-march=nocona -O2 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="assume-digests distlocks fixpackages news parallel-fetch protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch" FFLAGS="-march=nocona -O2 -pipe -fomit-frame-pointer" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" LDFLAGS="-Wl,-O1" LINGUAS="de fr" MAKEOPTS="-j1" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage/layman/n4g /usr/local/portage/layman/dotnet /usr/local/portage/layman/science /usr/local/portage/layman/java-overlay /usr/local/portage/layman/suka /usr/local/portage/layman/zugaina /usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X Xaw3d a52 aac acl acpi administrator afs aiglx alsa amd64 amrr ao aotuv apache2 asf aspell atlas auctex audacious audiofile automount bash-completion beagle berkdb bjam blas bluetooth bonobo boo boost branding bzip2 c++ cairo cardbus cdda cddb cdf cdio cdparanoia cdr cgi chm cli consolekit corba cracklib cran crypt cups curl cxx daap dbus device-mapper dga dia divx djvu dlloader dmi doc dri ds3490 dts dv dvb dvd dvdr dvi dxr3 dynagraph eds effects elf emacs emboss encode epiphany esd evo examples exif expat extra extras fam fame ffmpeg fftw firefox fits flac fltk foomaticdb fortran fpx fuse galago garmin gd gdal gdbm geolocation geos gif gimp gimpprint ginac glade glib glitz gml gmp gnokii gnome gnome-keyring gnuplot gnutls gphoto2 gpm graphics graphviz gs gsl gsm gstreamer gtk guile hal hardened harness hddtemp hdf hdf5 hlapi http httpd hvm iconv icq icu id3 ide imagemagick imap innodb ipod ipv6 irda irmc isdnlog ithreads jabber java java5 java6 jbig john jpeg jpeg2k kde kde4 kerberos kexi keyring kvm ladspa lame lapack laptop latex lcms ldap libffi libgda libnotify libsamplerate lirc lua lzo lzw mad maildir mailwrapper math matroska mikmod mmx mmxext mng mod modules mono motif mozdevelop mozilla mozsvg mozxmlterm mp3 mp4 mp4live mpeg mpeg2 mplayer mtp mudflap multilib musicbrainz mysql mysqli nautilus ncurses neXt netcdf netpbm network networkmanager nfs nls nntp nptl nptlonly nsplugin ntfs ntp numarray numeric nvidia obex objc ocaml octave odbc ogdi ogg ole openexr opengl openmp pae pam pcre pda pdf perl pipechan plotutils plugins png podcast policykit posix postgres postscript ppds pppd preview-latex proj projectx pstricks pulseaudio python qhull qt3support qt4 quicktime readline reflection reiserfs rhythmbox rle rpc rrdcgi rrdtool samba sasl science sdl server session slang slp smbclient smp sndfile snmp soup sox speex spell spl sql sqlite sse sse2 ssl startup-notification stlport subtitles subversion suexec svg sysfs szip t1lib tcl tcpd tex theora thinkpad threads thunar thunderbird tidy tiff tk tntc truetype unicode usb userlocales utempter v4l2 vorbis wav webdav webdav-serf webkit wifi wmf wxwidgets x264 xattr xcb xemacs xext xine xml xmlreader xmlrpc xorg xpm xulrunner xv xvid xvmc zlib zvbi" ALSA_CARDS="intel8x0" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic auth_digest authn_anon authn_dbd authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite setenvif so speling status unique_id userdir usertrack vhost_alias" DVB_CARDS="usb-wt220u" ELIBC="glibc" INPUT_DEVICES="keyboard mouse synaptics " KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="de fr" NETBEANS_MODULES="ide websvccommon nb harness apisupport groovy gsf j2ee java xml" USERLAND="GNU" VIDEO_CARDS="nv vesa" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
The cause of the trouble is that with USE=x264 media-video/ffmpeg-0.5_p20373 depends on >=media-libs/x264-0.0.20091021 but media-video/avidemux-2.5.1-r2 depends on <media-libs/x264-0.0.20090908 Caused infinite loops of "emerge @preserved-rebuild" for me on portage-2.2_rc46, for which I've just filed bug #290781.
You can thank Diego for that: https://bugs.gentoo.org/show_bug.cgi?id=290233#c1 I'll come up with a better fix for avidemux shortly.
Actually, a "better" fix wasn't needed. The masking of the avidemux snapshot was unwarranted, so unmasking again fixed this issue.
