$ ldd /usr/bin/ffmpeg 
        libavformat.so.51 => /usr/lib/libavformat.so.51 (0x00002ab1c5ade000)
        libavcodec.so.51 => /usr/lib/libavcodec.so.51 (0x00002ab1c5c63000)
        libavutil.so.49 => /usr/lib/libavutil.so.49 (0x00002ab1c60f0000)
        libm.so.6 => /lib/libm.so.6 (0x00002ab1c61fa000)
        libz.so.1 => /lib/libz.so.1 (0x00002ab1c6350000)
        libswscale.so.0 => /usr/lib/libswscale.so.0 (0x00002ab1c6463000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00002ab1c6585000)
        libc.so.6 => /lib/libc.so.6 (0x00002ab1c669b000)
        liba52.so.0 => /usr/lib/liba52.so.0 (0x00002ab1c68c3000)
        libxvidcore.so.4 => /usr/lib/libxvidcore.so.4 (0x00002ab1c69cf000)
        libx264.so.54 => /usr/lib/libx264.so.54 (0x00002ab1c6bbe000)
        libfaad.so.0 => /usr/lib/libfaad.so.0 (0x00002ab1c6d45000)
        /lib64/ld-linux-x86-64.so.2 (0x00002ab1c59c2000)