title: FFmpeg, av_frame_free - Does not free all memory allocated by av_frame_clone
body: <p>I want to clone <strong>AVFrame</strong>. For this purpose, I call <strong>av_frame_clone</strong> function.
  Then I want to free all memory allocated by old AVFrame. For this purpose I call <strong>av_frame_free</strong> function. Memory which is pointer by data is not freed by <strong>av_frame_free</strong> function. So what is the correct way of cloning and deleting a AVFrame in ffmpeg ? </p>
  
  <p>Thanks for responses.</p>