http://bugs.winehq.org/show_bug.cgi?id=30557
--- Comment #4 from Ruslan b7.10110111@gmail.com 2012-05-21 10:59:02 CDT --- (In reply to comment #3)
What is gstreamer used for in wine anyway? I only recently got it working on my 64bit system (on Debian, using multiarch) only to discover the error message mentioned above.
It's used to at least play some videos in games, e.g. intro videos in GTA 3,VC,SA.