Network connection slow when capturing video to SAN, dropping frames

I'm currently connected to a storage area network via Windows Server 2003 64bit (with ExtremeZ-IP for AFP connections) with 1000baseTX Gigabit Ethernet speeds. When transferring files through the finder I'm getting about 50-70MB transfer upload/download. When I am capturing HD video I noticed the upload speed is roughly 3MB/sec with many peaks and valleys in the transfer. Quite often I get dropped frames.
Does anyone know why this would happen? It seems to me the issue is somewhere in the network. I don't know for sure but I would think 3MB/sec is to slow to capture 1080p HD video. My CPU and memory have plenty of inactivity so I don't think the issue is there.

HDV video runs at 3.6MB/s. If that's what you are capturing, that data rate makes some sense.
Capturing from tape is not the same as transfering files as FCP wants the next packet of data to arrive RIGHT NOW and if it doesn't, it will interpret the delay, not as a lost packet to be re-sent, but as a dropped frame.
FCP is not designed to work this way. It really is set up to work as a stand alone workstation with connectivity. People have gotten it to work as you wish, but there are lots of tricky issues.
x

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s.haider
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sctbrd,
I have the exact same problem as you do with my Fx5600-vtr-128 capture card..
"jorge' does also have the same problem..Looks like it's systemic with the Nvidia card or drivers not being able to work with the WDM driver..I'll try to post a screen shot but jorge already has and I'll bet if you check his post you will find your exact bar or srtip...
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https://discussions.apple.com/message/16241503#16241503
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have the same problem...still waiting
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http://waugh.cchem.berkeley.edu/licence/faq/14/map.html
http://waugh.cchem.berkeley.edu/licence/faq/15/map.html
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http://waugh.cchem.berkeley.edu/licence/faq/18/map.html
http://waugh.cchem.berkeley.edu/licence/faq/13/index.html
http://waugh.cchem.berkeley.edu/licence/faq/14/index.html
http://waugh.cchem.berkeley.edu/licence/faq/15/index.html
http://waugh.cchem.berkeley.edu/licence/faq/16/index.html
http://waugh.cchem.berkeley.edu/licence/faq/17/index.html
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http://www.youtube.com/watch?v=aNNgJiZMrRA
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Network connection slow when capturing video to SAN, dropping frames

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