title: Unrecognized option '-enable-libx264'. Error splitting the argument list: Option not found
body: <p>I'm trying to stream MP4 videos from my server to YouTube and so I installed FFMPEG version. When I then look at the configuration of FFMPEG, I am then presented with the following:</p>
  
  <pre><code>ffmpeg version 3.3.6 Copyright (c) 2000-2017 the FFmpeg developers
    built with gcc 4.9.2 (Debian 4.9.2-10)
    configuration: --enable-cross-compile --arch=i686 --target-os=linux --disable-yasm --disable-static --enable-shared --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libsoxr --enable-version3 --enable-nonfree --enable-openssl --disable-decoder=ac3 --disable-decoder=ac3_fixed --disable-decoder=eac3 --disable-decoder=dca --disable-decoder=truehd --disable-encoder=ac3 --disable-encoder=ac3_fixed --disable-encoder=eac3 --disable-encoder=dca --disable-decoder=hevc --disable-decoder=hevc_cuvid --disable-encoder=hevc_nvenc --disable-encoder=nvenc_hevc --extra-ldflags='-L/root/daily_build/64_05/4.4.1/LinkFS/usr/lib -L/root/daily_build/64_05/4.4.1/Model/TS-X72/build/RootFS/usr/local/medialibrary/lib -Wl,--rpath -Wl,/usr/local/medialibrary/lib' --extra-cflags='-I/root/daily_build/64_05/4.4.1/LinkFS/usr/include -I/root/daily_build/64_05/4.4.1/Model/TS-X72/build/RootFS/usr/local/medialibrary/include -D_GNU_SOURCE -DQNAP' --prefix=/root/daily_build/64_05/4.4.1/Model/TS-X72/build/RootFS/usr/local/medialibrary
    libavutil      55. 58.100 / 55. 58.100
    libavcodec     57. 89.100 / 57. 89.100
    libavformat    57. 71.100 / 57. 71.100
    libavdevice    57.  6.100 / 57.  6.100
    libavfilter     6. 82.100 /  6. 82.100
    libswscale      4.  6.100 /  4.  6.100
    libswresample   2.  7.100 /  2.  7.100
    libpostproc    54.  5.100 / 54.  5.100
  </code></pre>
  
  <p>However, when I then try</p>
  
  <p><code>ffmpeg ---enable-libx264</code></p>
  
  <p>I then get an error saying:</p>
  
  <pre><code>Unrecognized option '--enable-libx264'.
  Error splitting the argument list: Option not found
  </code></pre>
  
  <p>Do I need to change the configuaration of FFMPEG somehow or run another configuration option first or is there just something wrong with my call to enable libx264?</p>