upper limit to jit.qt.movie trim?

Brad Garton's icon

Hey jitterers --

Is there an upper bound to the amount that the trim message can do on a qt movie? I have one that is 10 seconds long, I wanted to extract only 8 seconds. I set the units to "milliseconds" and send the message [trim 1 8000]. For some reason it trims it to 4 seconds length.