Webkitplayer (and video background) doesn't work on Windows and Mac

[Tomas Groth]

Seen in 2.1.3:
Due to changes in QtWebkit the webkitplayer (and thus video backgrounds) doesn't support media-playback on Windows and Mac in Qt 4.8.x. On Linux it still works.

The problem is described here: http://blog.enthought.com/open-source/fun-with-qtwebkit-html5-video

A Qt-bugreport is still unresolved: https://bugreports.qt.io/browse/QTBUG-22883

A few possible solutions:
Build and include qt-mobility (or the needed QtMultimedia module) in the OpenLP bundle (described in the blog post above).
Include and use a flashbased player.
Ignore and wait for OpenLP 2.4 which will use Qt5 where the issue does not exists.

[Tomas Groth (tomasgroth)]

If we go for the flashplayer solution, this simple player could be used: http://flv-player.net/players/js/

[Tomas Groth (tomasgroth)]

This issue will have to wait until 2.4 where our upgrade to PyQt5 will have fixed the problem.

[Phill (phill-ridout)]

"Build and include qt-mobility (or the needed QtMultimedia module) in the OpenLP bundle (described in the blog post above)." This solution has been known to OpenLP devs for quite a while, so I think this can be ruled out.

I would suggest disabling the replace live background button if webkit is not available. IMHO, this feature leads to a bad user experience. Especially if the user has got OpenLP set up to use VLC, in which case videos that play through VLC as a media item, may not necessary play as a live background using webkit.

[Tomas Groth (tomasgroth)]

I've included the workaround that Phill mentions in my bugfixes19 branch.