It'd be much easier on Linux to tap the video stream from the Silverlight player. You could probably do it in userspace, with a modified X server, or even some

It'd be much easier on Linux to tap the video stream from the Silverlight player. You could probably do it in userspace, with a modified X server, or even something like Xnest. The only way I can think of for Silverlight to get around it would be to talk to the GPU directly. (Even then, it might be possible, with a virtual machine that installs a special GPU.)