media-video/ffmpeg-0.4.9_p20080326 ffplay plays this file ok(image and sound in sync), but mplayer is not able to sync image and sound: http://dl.free.fr/fQAytsYbh/test.ogg use flags and versions: media-video/ffmpeg-0.4.9_p20080326 USE="X aac amr encode ipv6 mmx mp3 network sdl theora threads truetype vorbis xvid zlib -a52 (-altivec) -bindist -debug -doc -hardcoded-tables -ieee1394 -imlib -test -x264" media-video/mplayer-1.0_rc2_p26258 USE="X a52 aac alsa color-console dvd encode gtk iconv ipv6 jpeg mad mmx mp3 png real sse sse2 theora truetype unicode vorbis xinerama xscreensaver xv xvid -3dnow -3dnowext -aalib (-altivec) -amrnb -amrwb -arts -bidi -bindist -bl -cddb -cdio -cdparanoia -cpudetection -custom-cflags -debug -dga -directfb -doc -dts -dv -dvb -enca -esd -fbcon -ftp -ggi -gif -jack -joystick -ladspa -libcaca -lirc -live -lzo -md5sum -mmxext -mp2 -musepack -nas -nemesi -openal -opengl -oss -pnm -pulseaudio -quicktime -radio -rar -rtc -samba -sdl -speex -srt -ssse3 (-svga) -teletext -tga -tivo -v4l -v4l2 (-vidix) (-win32codecs) -x264 -xanim -xvmc -zoran" VIDEO_CARDS="-mga -s3virge -tdfx -vesa" media-libs/libtheora-1.0_beta2-r1 USE="encode -doc -examples" media-libs/flac-1.2.1-r2 USE="cxx ogg sse -3dnow (-altivec) -debug -doc" emerge --info: Portage 2.1.4.4 (default-linux/amd64/2007.0, gcc-4.1.2, glibc-2.6.1-r0, 2.6.24-gentoo-r3 x86_64) ================================================================= System uname: 2.6.24-gentoo-r3 x86_64 Intel(R) Pentium(R) D CPU 3.40GHz Timestamp of tree: Thu, 27 Mar 2008 04:45:03 +0000 app-shells/bash: 3.2_p17-r1 dev-lang/python: 2.4.4-r9 dev-python/pycrypto: 2.0.1-r6 sys-apps/baselayout: 1.12.11.1 sys-apps/sandbox: 1.2.18.1-r2 sys-devel/autoconf: 2.13, 2.61-r1 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10 sys-devel/binutils: 2.18-r1 sys-devel/gcc-config: 1.4.0-r4 sys-devel/libtool: 1.5.26 virtual/os-headers: 2.6.23-r3 ACCEPT_KEYWORDS="amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -fomit-frame-pointer -pipe -march=nocona" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/terminfo /etc/udev/rules.d" CXXFLAGS="-O2 -fomit-frame-pointer -pipe -march=nocona" DISTDIR="/usr/portage/distfiles" FEATURES="distlocks metadata-transfer sandbox sfperms strict unmerge-orphans userfetch" GENTOO_MIRRORS="ftp://ftp.free.fr/mirrors/ftp.gentoo.org/ ftp://mirror.ovh.net/gentoo-distfiles/ http://ftp.club-internet.fr/pub/mirrors/gentoo http://mirror.ovh.net/gentoo-distfiles/" LANG="fr_FR.UTF-8" LINGUAS="fr" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" 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/portage/local/layman/mozilla /usr/portage/local/layman/sbertrand" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="X aac alsa amd64 apache2 audiofile bash-completion bzip2 cairo cli cracklib crypt curl dri encode expat ffmpeg fftw flac gdbm gnutls gstreamer gtk iconv idn ipv6 isdnlog jbig jpeg jpeg2k libsamplerate mad midi mikmod mmx mp3 mudflap ncurses nls no-old-linux nptl nptlonly ogg pam pcre perl png pppd python readline reflection session spell spl sse sse2 ssl svg symlink threads tiff truetype unicode vim-syntax vorbis xinerama xml xorg xulrunner xv xvid zlib" ALSA_CARDS="hda-intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon 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 deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="fr" USERLAND="GNU" VIDEO_CARDS="nv none" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LDFLAGS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
There's really not much we can do about A/V issues since it's a problem with configuration or the original file. Your best bet is to ask on the mplayer-users list.
"-mc 0" solved the issue. Don't know if it would fit in the main mplayer configuration file.