h1249862:/home/ffmpeg_svn# ldd /usr/local/bin/ffmpeg
        libm.so.6 => /lib/tls/libm.so.6 (0xb7fbd000)
        libz.so.1 => /usr/lib/libz.so.1 (0xb7fab000)
        libamrnb.so.2 => not found
        libdl.so.2 => /lib/tls/libdl.so.2 (0xb7fa7000)
        libc.so.6 => /lib/tls/libc.so.6 (0xb7e72000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0xb7fe9000)