ldd /usr/lib/libavcodec.so.51
        linux-gate.so.1 =>  (0x003f5000)
        libavutil.so.49 => /usr/lib/libavutil.so.49 (0x0039d000)
        libm.so.6 => /lib/libm.so.6 (0x00110000)
        libz.so.1 => /usr/lib/libz.so.1 (0x00f49000)
        libmp3lame.so.0 => /usr/lib/libmp3lame.so.0 (0x00b3e000)
        libvorbis.so.0 => /usr/lib/libvorbis.so.0 (0x00137000)
        libvorbisenc.so.2 => /usr/lib/libvorbisenc.so.2 (0x00161000)
        libxvidcore.so.4 => /usr/lib/libxvidcore.so.4 (0x0025d000)
        libx264.so.54 => /usr/lib/libx264.so.54 (0x0093d000)
        libfaac.so.0 => /usr/lib/libfaac.so.0 (0x00d57000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00371000)
        libc.so.6 => /lib/libc.so.6 (0x009cc000)
        /lib/ld-linux.so.2 (0x80000000)
        libogg.so.0 => /usr/lib/libogg.so.0 (0x00388000)
        libmp4v2.so.0 => /usr/lib/libmp4v2.so.0 (0x00e4a000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00bb5000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x0038e000)