title: Extracting image from QMediaPlayer Video
body: <p>i am using Qt Creator to implement an application that reads a video and by clicking on a button i will save the frame that is being showed. Then i will process that frame with Opencv. </p>
  
  <p>Having a video being displayed with QmediaPlayer, how can i extract a frame from the video? I should then be able to convert that frame to a Mat image in Matlab. </p>
  
  <p>Thanks</p>