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Sequence Grabber: subsampled images with multiple cameras on different FW ports?

Hi,

I based a project upon the WackedTV sample code. 

However when I am trying to use multiple cameras - and camcorder connected to the front port of my g5 and an iSight connected to the back FW800 *or* back FW400, the resolution seems to be downsampled by 2 automatically, or more exactly the calls CVImageBufferGetCleanRect(pixelBuffer) and CVImageBufferGetDisplaySize(pixelBuffer) in the displayData callack of SGVideo.mm returns a size subsampled by two.

I understand why this would be on the same FW400 port, but in my mind the FW800 and front FW400 were independant? Why does this happen? Do I need to change some code to avoid that? 

Thanks for any help!

The subsampling happens as soon as I *plug* a second camera, I do not even need to start capturing.

Kevin
CVI
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