ffmpeg: execute with more options

I installed FFMPEG using apt-get. It comes by default compiled with some options:

configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads
      --enable-libvorbis --enable-libtheora --enable-libogg --enable-libgsm
      --enable-dc1394 --disable-debug --enable-shared --prefix=/usr

How can I execute it and add more options without recompiling it开发者_开发技巧? I'm looking for a way to execute including the option: -enable libspeex1.

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You don't. Changing those options requires recompiling.