Having same issue. Ubuntu 11.04 64bit compiles with trunk last night. using libmp4v2-0 and libmp4v2-dev. Here is ldd. linux-vdso.so.1 => (0x00007fff551ff000) libportaudio.so.2 => /usr/lib/libportaudio.so.2 (0x00007f96c80a7000) libporttime.so.0 => /usr/lib/libporttime.so.0 (0x00007f96c7ea5000) libportmidi.so.0 => /usr/lib/libportmidi.so.0 (0x00007f96c7c9b000) libQtOpenGL.so.4 => /usr/lib/libQtOpenGL.so.4 (0x00007f96c79ad000) libQtXml.so.4 => /usr/lib/libQtXml.so.4 (0x00007f96c7769000) libQtSvg.so.4 => /usr/lib/libQtSvg.so.4 (0x00007f96c7510000) libQtSql.so.4 => /usr/lib/libQtSql.so.4 (0x00007f96c72d2000) libQtScript.so.4 => /usr/lib/libQtScript.so.4 (0x00007f96c6e19000) libQtXmlPatterns.so.4 => /usr/lib/libQtXmlPatterns.so.4 (0x00007f96c67ab000) libQtWebKit.so.4 => /usr/lib/libQtWebKit.so.4 (0x00007f96c5049000) libQtGui.so.4 => /usr/lib/libQtGui.so.4 (0x00007f96c43a8000) libQtNetwork.so.4 => /usr/lib/libQtNetwork.so.4 (0x00007f96c4077000) libQtCore.so.4 => /usr/lib/libQtCore.so.4 (0x00007f96c3be7000) libsndfile.so.1 => /usr/lib/libsndfile.so.1 (0x00007f96c397f000) libFLAC.so.8 => /usr/lib/libFLAC.so.8 (0x00007f96c3734000) libvorbisfile.so.3 => /usr/lib/libvorbisfile.so.3 (0x00007f96c352c000) libvorbis.so.0 => /usr/lib/libvorbis.so.0 (0x00007f96c3300000) libogg.so.0 => /usr/lib/libogg.so.0 (0x00007f96c30f8000) libGL.so.1 => /usr/lib/mesa/libGL.so.1 (0x00007f96c2e7b000) libGLU.so.1 => /usr/lib/libGLU.so.1 (0x00007f96c2c0c000) libtag.so.1 => /usr/lib/libtag.so.1 (0x00007f96c297b000) libmad.so.0 => /usr/lib/libmad.so.0 (0x00007f96c275c000) libid3tag.so.0 => /usr/lib/libid3tag.so.0 (0x00007f96c2546000) libshout.so.3 => /usr/lib/libshout.so.3 (0x00007f96c2334000) libvorbisenc.so.2 => /usr/lib/libvorbisenc.so.2 (0x00007f96c1e65000) libmp4.so.0 => /usr/lib/libmp4.so.0 (0x00007f96c1c46000) libfaad.so.2 => /usr/lib/libfaad.so.2 (0x00007f96c1a03000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f96c16fd000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f96c1478000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f96c1261000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f96c0ecd000) libasound.so.2 => /usr/lib/libasound.so.2 (0x00007f96c0be2000) libjack.so.0 => /usr/lib/libjack.so.0 (0x00007f96c09c4000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f96c07bc000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f96c059e000) libfreetype.so.6 => /usr/lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f96c0304000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f96c0100000) libXrender.so.1 => /usr/lib/x86_64-linux-gnu/libXrender.so.1 (0x00007f96bfef5000) libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f96bfbba000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f96bf9a2000) libsqlite3.so.0 => /usr/lib/x86_64-linux-gnu/libsqlite3.so.0 (0x00007f96bf708000) libphonon.so.4 => /usr/lib/libphonon.so.4 (0x00007f96bf497000) libfontconfig.so.1 => /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007f96bf261000) libaudio.so.2 => /usr/lib/libaudio.so.2 (0x00007f96bf047000) libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f96bed58000) libpng12.so.0 => /lib/x86_64-linux-gnu/libpng12.so.0 (0x00007f96beb31000) libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f96be8df000) libSM.so.6 => /usr/lib/x86_64-linux-gnu/libSM.so.6 (0x00007f96be6d7000) libICE.so.6 => /usr/lib/x86_64-linux-gnu/libICE.so.6 (0x00007f96be4bc000) libXi.so.6 => /usr/lib/x86_64-linux-gnu/libXi.so.6 (0x00007f96be2ab000) libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007f96be099000) libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f96bde93000) libXdamage.so.1 => /usr/lib/x86_64-linux-gnu/libXdamage.so.1 (0x00007f96bdc90000) libXfixes.so.3 => /usr/lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007f96bda89000) libXxf86vm.so.1 => /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1 (0x00007f96bd883000) libdrm.so.2 => /lib/x86_64-linux-gnu/libdrm.so.2 (0x00007f96bd678000) /lib64/ld-linux-x86-64.so.2 (0x00007f96c8510000) libtheora.so.0 => /usr/lib/libtheora.so.0 (0x00007f96bd429000) libspeex.so.1 => /usr/lib/libspeex.so.1 (0x00007f96bd20f000) libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f96bcff2000) libpulse.so.0 => /usr/lib/libpulse.so.0 (0x00007f96bcdb1000) libpulse-mainloop-glib.so.0 => /usr/lib/libpulse-mainloop-glib.so.0 (0x00007f96bcbac000) libQtDBus.so.4 => /usr/lib/libQtDBus.so.4 (0x00007f96bc934000) libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f96bc70a000) libXt.so.6 => /usr/lib/x86_64-linux-gnu/libXt.so.6 (0x00007f96bc4a4000) libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f96bc2a0000) libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f96bc064000) libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f96bbe5f000) libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f96bbc58000) libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f96bba56000) libXtst.so.6 => /usr/lib/libXtst.so.6 (0x00007f96bb84f000) libxcb-atom.so.1 => /usr/lib/libxcb-atom.so.1 (0x00007f96bb64a000) libpulsecommon-0.9.22.so => /usr/lib/libpulsecommon-0.9.22.so (0x00007f96bb3fe000) libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f96bb1b9000) libwrap.so.0 => /lib/libwrap.so.0 (0x00007f96bafae000) libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f96bad93000)