Video for win 7

[GoogleCodeExporter]

I'm using datasoul 2.1b0.
When I add a video clip I get sound but no video, the player bar moves along on 
the control scrteen window but there's no output.

I have the same installation at home and it works fine.
The church laptop is a dell inspiron 1545 and my home system is a basic dual 
core PC.

I have reloaded it but its the same, Is there something else that I may need to 
install besides gstreamer

Original issue reported on code.google.com by nanoll...@gmail.com on 9 Jun 2013 at 5:15