Make Mp4/h264 Video Work In Qtwebengine On Windows

When I point the QtWebEngine instance at a html5 test page (http://www.quirksmode.org/html5/tests/video.html) I see the WebM video, the Theora video, but not H.264/MP4. Enabling mp

Solution 1:

My solution was to upgrade to Qt 5.6.1. Otherwise, I followed the directions in the original question and this time got a working result. Most notable, the qmake WEBENGINE_CONFIG+=use_proprietary_codecs did confirm it was checking and configuring h264 and mp3.