I solved this video playback problem on Windows by removing everything
except the DirectShow plug-in. I got the idea after I noticed the git
commit entry below, which references a bug that describes my exact
issue. Now video playback works in the player.exe demo.

commit 5ec7076982a1269eaba5410c427e3787e5f39c4c
Author: Andrew den Exter <andrew.den-ex...@nokia.com>
Date:   Thu Oct 7 14:41:02 2010 +1000

    Don't build the Windows Media Player plug-in for QtMultimediaKit.

    The DirectShow plug-in is preferred for playback due to better support
    for rendering video, but because they otherwise have equal capabilities
    the WMP plug-in is usually loaded first.

    Task-number: QTMOBILITY-554

On Wed, Oct 6, 2010 at 4:35 PM, Chris Meyer <cmeyer1969...@gmail.com> wrote:
> I'm using qt-mobility (master) with Qt 4.6.2 on Windows.
>
> I'm configuring/building with the following commands:
>
> configure.bat -modules multimedia -demos
> nmake
> nmake install
>
> Everything builds.
>
> Then I run the demo 'player.exe' which is a video player. It finds the
> plug-ins and dlls and launches.
>
> However, when I play a movie, I get SOUND for the movies, but NO VIDEO.
>
> Has anyone else experienced this problem? Has anyone else seen video
> working on Windows? Any ideas on what might be wrong?
>
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