title: Using FFMPEG with QT
body: <p>I'm having a problem with linking FFmpeg libraries to Qt 5.10 Projects.
  I downloaded the source code from the official website and successfully compiled and installed to my Ubuntu. I used: <code>./configure --enable-libvpx --disable-x86asm</code> them: <code>make &amp;&amp; make install</code>
  I'm able to find the installed libraries in <code>/usr/local/lib</code> (which are .a libs).</p>
  
  <p>my .pro looks like this: </p>
  
  <pre><code>INCLUDEPATH += /usr/local/include
  LIBS += -L/usr/local/lib -lavformat -lavcodec -lavutil
  </code></pre>
  
  <p>but i get the output: </p>
  
  <pre><code>/usr/bin/x86_64-linux-gnu-ld: 
  /usr/loca/lib/libavformat.a(http.o):undefined reference to symbol 'inflateEnd'
  //lib/x86_64-linux-gnu/libz.so.1: error adding symbols: DSO missing from command line
  </code></pre>
  
  <p>Does anyone know how to solve it? Thanks for the attention!</p>
  
  <p>Note: I would like to static link it to my project</p>