title: Enabling mp4/mpeg4/avc support for Qt5 WebEngine on Linux
body: <p>i installed Qt 5.4.1 x64 on LUbuntu and created an app which uses the new QtWebEngine.</p>
  
  <p>I`m trying to display a html5 page with that component which is using the  tag. 
  All works fine except if I try to playback a mp4 video. The video area remains black. It works if I use other video types like webm/ogg as source.</p>
  
  <p>I know this is due to license restrictions, so that mp4 is deactivated by default in Ubuntu/Linux for Qt.</p>
  
  <p>What is needed in Qt to activate it to allow mp4 playback and on what do I have pay attention in case of license terms (I read that statically linking the library is allowed?) ?</p>
  
  <p>I`ve already tried to copy over the x64 distribution of libffmpegsuo.so which is included in Chrome (2,2Mb) over to the Qt directory to /plugins/webengine/ and replaced that one that was already there (1,1 Mb) but it had no effect.
  In Chrome playback works fine btw.</p>
  
  <p>If you need more details like paths etc. please tell me.</p>
  
  <p>Thanks !</p>