Something

zuki@WhiteCastle:~/Desktop/transcode-1.0.2$ ldd /usr/lib/libavcodec.so
        linux-gate.so.1 =>  (0xffffe000)
        libavutil.so.49 => /usr/local/lib/libavutil.so.49 (0xb7c18000)
        libm.so.6 => /lib/tls/libm.so.6 (0xb7bf5000)
        libz.so.1 => /usr/lib/libz.so.1 (0xb7be3000)
        libmp3lame.so.0 => /usr/local/lib/libmp3lame.so.0 (0xb7b58000)
        libvorbis.so.0 => /usr/lib/libvorbis.so.0 (0xb7b30000)
        libvorbisenc.so.2 => /usr/lib/libvorbisenc.so.2 (0xb7a31000)
        libxvidcore.so.4 => not found
        libfaac.so.0 => not found
        libfaad.so.0 => not found
        libpthread.so.0 => /lib/tls/libpthread.so.0 (0xb7a1e000)
        libc.so.6 => /lib/tls/libc.so.6 (0xb78ef000)
        /lib/ld-linux.so.2 (0x80000000)
        libogg.so.0 => /usr/lib/libogg.so.0 (0xb78e9000)