Comment 4 for bug 846379

To update this, it looks like gstreamer is providing binary builds on other platforms:

http://gstreamer.freedesktop.org/data/pkg/

I haven't actually looked at them yet. The description I found said that they don't include additional things like GTK+, which could possibly be a barrier for us. However, it looks like the pygobject stuff is releasing at least WIndows binaries, which could work:

http://sourceforge.net/projects/pygobjectwin32/files/?source=navbar