Setting the Webcam resolution?

Hello,
I planned to writing some basic motion tracking software in Java using the JMF. The webcam I planned to order is the Creative webcam live mentioned here on amazon:
http://www.amazon.com/exec/obidos/tg/detail/-/B0002UE9WI/qid=1125501861/sr=8-5/ref=pd_bbs_5/103-4724716-5856630?v=glance&s=electronics&n=507846
The webcam is said to have a resolution of 640 x 480, and hoped to use the FrameAccess.java example from Sun to use the webcam rather than a video.
The FrameAccess.java I believe allows access to the pixels of each frame.
I just wondered if anyone knew, if the JMF included any functions to change the resolution of the webcam from 640 x 480 to maybe 320 x 240?
So there are less pixels to process from each frame?
Many thanks

Thank you for replying.
When I use this creative webcam with JMF, do you think using the FrameAccess code and changing this code to work with a webcam rather than video.
The FrameAccess code would display an image less than 620 x 480 in the swing component, and in the process method which allows access the frame pixels the number of pixels would be less than 620 x 480?
Even though the webcam has a default 640 x 240 setting? Would you have any idea how small the 640 x 480 would be reduced to?
Thanks

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