what we can do to solve this problem if there some application which is not able to emerge, if libav version is not suitable? Reproducible: Always Actual Results: # emerge app-pda/gtkpod -av !!! Repository 'bitcoin' has sync-uri attribute, but is missing sync-type attribute * IMPORTANT: 1 news items need reading for repository 'gentoo'. * Use eselect news read to view new items. These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild N ] app-admin/killproc-2.13-r1::gentoo 38 KiB [ebuild N ] media-libs/libdiscid-0.6.1::gentoo USE="-static-libs" 358 KiB [ebuild N ] media-libs/mutagen-1.27::gentoo USE="-doc {-test}" PYTHON_TARGETS="python2_7 python3_4 -python3_3" 856 KiB [ebuild NS ] media-libs/gst-plugins-bad-0.10.23-r2:0.10::gentoo [1.4.5:1.0::gentoo] USE="nls orc" ABI_X86="32 (64) (-x32)" 3.087 KiB [ebuild N ] media-plugins/gst-plugins-vorbis-0.10.36-r1:0.10::gentoo ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] media-plugins/gst-plugins-theora-0.10.36-r1:0.10::gentoo ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] media-plugins/gst-plugins-ogg-0.10.36-r1:0.10::gentoo ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] media-plugins/gst-plugins-xvideo-0.10.36-r1:0.10::gentoo ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] media-plugins/gst-plugins-alsa-0.10.36-r1:0.10::gentoo ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] media-plugins/gst-plugins-x-0.10.36-r1:0.10::gentoo ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-cdparanoia-0.10.36-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-faad-0.10.23-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] media-plugins/gst-plugins-xvid-0.10.23-r1:0.10::gentoo ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-resindvd-0.10.23-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-dts-0.10.23-r1:0.10::gentoo [1.4.5:1.0::gentoo] USE="orc" ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-libs/gst-plugins-ugly-0.10.19-r1:0.10::gentoo [1.4.5:1.0::gentoo] USE="nls orc" ABI_X86="32 (64) (-x32)" 862 KiB [ebuild NS ] media-libs/gst-plugins-good-0.10.31-r1:0.10::gentoo [1.4.5:1.0::gentoo] USE="nls orc" ABI_X86="32 (64) (-x32)" 2.674 KiB [ebuild NS ] media-plugins/gst-plugins-jack-0.10.31-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-mad-0.10.19-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-flac-0.10.31-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-a52dec-0.10.19-r1:0.10::gentoo [1.4.5:1.0::gentoo] USE="orc" ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-oss-0.10.31-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-x264-0.10.19-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-lame-0.10.19-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-dvdread-0.10.19-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-wavpack-0.10.31-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] media-libs/musicbrainz-3.0.3:3::gentoo USE="{-test}" 104 KiB [ebuild N ] dev-libs/gdl-3.14.0:3/5::gentoo USE="introspection" 526 KiB [ebuild NS ] media-plugins/gst-plugins-pulse-0.10.31-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-mpeg2dec-0.10.19-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild UD ] media-video/libav-9.17:0/9::gentoo [11.3:0/11::gentoo] USE="X aac alsa bzip2 encode faac gpl hardcoded-tables ieee1394 jack jpeg2k mp3 network oss pulseaudio schroedinger sdl ssl theora threads tools truetype vaapi vdpau vorbis x264 xvid zlib (-altivec) -amr -cdio -cpudetection -custom-cflags -debug -doc -fdk -frei0r -gsm (-neon) -openssl -opus -pic -rtmp -speex -static-libs {-test} -v4l (-vis) -vpx (-armv5te%) (-armv6%) (-armv6t2%) (-armvfp%) (-bs2b%) (-fontconfig%) (-twolame%) (-wavpack%*) (-webp%) (-x265%)" ABI_X86="32 (64) (-x32)" CPU_FLAGS_X86="mmx ssse3 -3dnow -3dnowext -avx -mmxext (-avx2%) (-fma3%) (-fma4%) (-sse%*) (-sse2%*) (-sse3%*) (-sse4_1%) (-sse4_2%) (-xop%)" 3.985 KiB [ebuild N ] media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r3:0.10::gentoo USE="libav orc" ABI_X86="32 (64) (-x32)" 4.199 KiB [ebuild NS ] media-plugins/gst-plugins-mplex-0.10.23-r1:0.10::gentoo [1.4.5:1.0::gentoo] ABI_X86="32 (64) (-x32)" 0 KiB [ebuild NS ] media-plugins/gst-plugins-meta-0.10-r10:0.10::gentoo [1.0-r3:1.0::gentoo] USE="X a52 aac alsa cdda dts dvd ffmpeg flac jack lame mp3 mpeg ogg oss pulseaudio theora vcd vorbis wavpack x264 xv xvid -dv -dvb -http -libass -libvisual -mms -modplug -musepack -opus -taglib -v4l -vpx" ABI_X86="32 (64) (-x32)" 0 KiB [ebuild N ] sys-apps/sg3_utils-1.40::gentoo USE="-static-libs" 1.153 KiB [ebuild N ] sys-apps/rescan-scsi-bus-1.57-r1::gentoo 23 KiB [ebuild N ] media-libs/libgpod-0.8.3::gentoo USE="gtk python udev -ios -mono -static-libs" PYTHON_TARGETS="python2_7" 784 KiB [ebuild N ] gnome-extra/libgda-5.2.2:5/4::gentoo USE="berkdb gtk introspection java ldap ssl -canvas -debug (-firebird) -graphviz -http -json -libsecret -mdb -mysql -oci8 -postgres -reports -sourceview" PYTHON_TARGETS="python2_7" 11.888 KiB [ebuild N ] dev-util/anjuta-3.14.1::gentoo USE="introspection subversion -debug -devhelp -glade (-packagekit) -terminal {-test} -vala" PYTHON_TARGETS="python2_7" 6.163 KiB [ebuild N ] app-cdr/brasero-3.12.1:0/3.1::gentoo USE="css introspection libburn mp3 -nautilus (-packagekit) -playlist {-test} -tracker" 3.598 KiB [ebuild N ] app-pda/gtkpod-2.1.4::gentoo USE="aac cdr flac gstreamer mp3 vorbis webkit -clutter -curl" 3.635 KiB Total: 41 packages (1 downgrade, 20 new, 20 in new slots), Size of downloads: 43.923 KiB !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: media-video/libav:0 (media-video/libav-9.17:0/9::gentoo, ebuild scheduled for merge) pulled in by <media-video/libav-10:0=[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by (media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r3:0.10/0.10::gentoo, ebuild scheduled for merge) ^ ^^^^^ (media-video/libav-11.3:0/11::gentoo, installed) pulled in by >=media-video/libav-11:0= required by (media-video/vlc-2.2.1:0/5-7::gentoo, installed) ^^ ^^^^^ media-video/libav:0/11= required by (media-video/vlc-2.2.1:0/5-7::gentoo, installed) ^^^^^^ (and 8 more with the same problems) It may be possible to solve this problem by using package.mask to prevent one of those packages from being selected. However, it is also possible that conflicting dependencies exist such that they are impossible to satisfy simultaneously. If such a conflict exists in the dependencies of two different packages, then those packages can not be installed simultaneously. You may want to try a larger value of the --backtrack option, such as --backtrack=30, in order to see if that will solve this conflict automatically. For more information, see MASKED PACKAGES section in the emerge man page or refer to the Gentoo Handbook. Portage 2.2.18 (python 3.4.3-final-0, default/linux/amd64/13.0/desktop, gcc-4.9.2, glibc-2.20-r2, 4.0.1-gentoo x86_64) ================================================================= System uname: Linux-4.0.1-gentoo-x86_64-Intel-R-_Core-TM-_i7-3740QM_CPU_@_2.70GHz-with-gentoo-2.2 KiB Mem: 24625988 total, 5273996 free KiB Swap: 25461756 total, 25461756 free Timestamp of repository gentoo: Fri, 01 May 2015 22:30:01 +0000 sh bash 4.3_p33-r2 ld GNU ld (Gentoo 2.25 p1.1) 2.25 app-shells/bash: 4.3_p33-r2::gentoo dev-java/java-config: 2.2.0::gentoo dev-lang/perl: 5.20.2::gentoo dev-lang/python: 2.7.9-r2::gentoo, 3.4.3::gentoo dev-util/cmake: 3.2.1::gentoo dev-util/pkgconfig: 0.28-r2::gentoo sys-apps/baselayout: 2.2::gentoo sys-apps/openrc: 0.14::gentoo sys-apps/sandbox: 2.6-r1::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r1::gentoo sys-devel/automake: 1.11.6-r1::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25::gentoo sys-devel/gcc: 4.9.2::gentoo sys-devel/gcc-config: 1.8::gentoo sys-devel/libtool: 2.4.6-r1::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 4.0::gentoo (virtual/os-headers) sys-libs/glibc: 2.20-r2::gentoo Repositories: gentoo location: /mnt/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 lokal location: /mnt/portage/local/local-overlay masters: gentoo priority: 0 bitcoin location: /mnt/portage/local/layman/bitcoin sync-uri: https://gitlab.com/bitcoin/gentoo.git masters: gentoo priority: 50 brother-overlay location: /mnt/portage/local/layman/brother-overlay masters: gentoo priority: 50 bumblebee location: /mnt/portage/local/layman/bumblebee masters: gentoo priority: 50 dotnet location: /mnt/portage/local/layman/dotnet masters: gentoo priority: 50 dr location: /mnt/portage/local/layman/dr masters: gentoo priority: 50 media-overlay location: /mnt/portage/local/layman/media-overlay masters: gentoo priority: 50 steam-overlay location: /mnt/portage/local/layman/steam-overlay masters: gentoo priority: 50 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=corei7 -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/gnupg/qualified.txt /var/lib/hsqldb" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.6/ext-active/ /etc/php/cgi-php5.6/ext-active/ /etc/php/cli-php5.6/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" CXXFLAGS="-march=corei7 -O2 -pipe" DISTDIR="/mnt/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="de_DE.UTF-8" LC_ALL="" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j9" PKGDIR="/mnt/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp"
media-video/vlc-2.2.1 requires >=media-video/libav-11 media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r3 requires <media-video/libav-10 I guess you should build media-plugins/gst-plugins-meta with USE="-ffmpeg" to solve the conflict.
thanks your very much. this is indeed the solution, which i am looking for.