Poster Image in Strobe Player: Must it be a Bitmap Image?

11-30  Source: Network gathering  Views:1 

Quick question: must the poster image be a bitmap image in the Strobe and Flash players in OSMF?  I would like to use .jpg images because the quality is much better, etc.  When I try to create an image in Photoshop and convert it to a bitmap, the quality is very degraded and must be in black and white.
Thanks so much.
Thanks very much for the reply.  I had uploaded a .gif, which didn't work, then went into the documentation and saw it written that poster images were bitmap images and assumed that meant that I need to use a bitmap in order for it to work.
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