mpeg streamclip problem

Hi i used to use this application all the time, and never had any problems with it. Since it as been upgraded to 1.9.1 and since I myself upgraded to Leopard 10.5 ish I cannot do what I could do before. Simple convert of .avi files to dv.

Now I get sound playing in the preview pane, but no picture, have tried to convert but get the same result. Before this was so easy.

Any tips appreciated..

Thx